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96-104503114 ra- "7 CITY OF FEDERAL WAY DEPARTMENT OF COMMUNITPDEVELOPMENT FINAL STAFF EVALUATION FOR ENVIRONMENTAL CHECKLIST PLAT OF CENTURY, LOT 14 STORM FACILITY REVISION MEAL WAY FILE NO: SEP 96-0039 RELATED FILE NO's: LSM 96-0003, UPR 96-0060 EXFIIBTT4 Exhibit A Reduced Scale site plan. Exhibit B Vicinity Map. Exhibit C SEPA checklist dated December 5, 1996. I. USEDACIM The applicant proposes to abandon an existing interim storm water detention pond and facilities, and fill and grade the lot for future development at 1401 South 312th Street, in Federal Way, (Exhibit A). II. Project Name: Plat of Century Lot 14 Storm Facility Revision Applicant: Century Square Associates Contact: Chris Leady, Century Square Associates 2000 - 124th Ave NE Bellevue, WA 98005 (206) 455-0504 Location: Lot 14, Plat of Century 1401 South 324th Street, Federal Way, WA 98003, (Exhibit B). S-T-R: NW 17-21-04 Parcel Size: 49,900 square feet Zoning: BC, Community Business Comprehensive Plan Designation: Community Business NOTE: Technical reports and attachments referenced below may not be attached to all copies of this decision. Copies of exhibits, reports, attachments, or other documents may be reviewed and/or obtained by contacting the Department of Community unitDevelop ment Services, 3353� lst Way South, Federal Way, Washington, 98003, phone( ) 661�411g The following information was submitted as part of the application for development: • Topographic Survey prepared by Bush Roed and Hitchings dated October 1996 • Environmental SEPA checklist dated 12/5/96, • Geotechnicial Engineering Study prepared by Geo Group Northwest, Inc, dated November 25, 1996 • Plat certificates for lot 14 prepared by Stewart Title dated December 4, 1996 • TIR by Bush Roed and Hitchings dated December 11, 1996. • Grading & drainage plan prepared by Bush Roed and Hitchings dated December 5, 1996 • Correspondence from Hal Hagenson to the City of Federal Way dated December 6, 1996 At the creation of the fourteen lot Plat of Century in 1974, lot 14 was established as an interim storm drainage facility. The face of the plat states "Lot 14 is subject to a temporary storm drainage easement, said easement to expire when an adequate drainage pipe system is constructed in Pacific Highway South eliminating the requirements for a retention basin on this lot." In the summer of 1996, the City of Federal Way began construction of the Kitts Corner/So. 336th Regional Stormwater Detention facility. This facility was designed to provide regional stormwater detention for the city and is sized to accommodate the drainage currently handled by the Plat of Century lot 14 drainage facility. The Kitts Corner/So.336th project is 9� percent complete. Upon completion of the city project and 'issuance of the land surface modification approval for plat of Century lot 14, the drainage easement can be administratively removed by the Director of Community Development Services. The applicant submitted a land surface modification application (in conjunction with Use Process I) and SEPA checklist on December 16, 1996. The Community Development Review Committee (CDRC) reviewed the proposal on January 2, 1997. The checklist was determined complete on January 15, 1997. .►►1.0 ►ful *� -� The following lists the elements of the Environmental with the applicant Checklist response to the EPA nse to each: 1. Whether city staff concurs or does not co checklist item, or r clarification 2. City staff's additional comments oto each checklist item. [.MI—YXIf a Zr a►r � 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. & 12. Concur with Checklist. I _�►I I.� 1 ►ICJ ►fl :_ �� r. rlr 1. Earth: Pursuant to WAC 197-11-340(2), the City of Federal Way is required to send any DNS which may result from this environmental review, along with the checklist, to DOE, the U.S. Army Corps of Engineers, other agencies with jurisdiction, affected tribes, and interested parties. Therefore, the city will not act on this proposal for 15 days after the DNS issuance. a. & b. Concur with checklist. c. The 1973 USDA Soil Conservation Service's (SCS) "Soil Survey for the King County Area" classifies the soils as EwC, Everett-Alderwood gravelly sandy loams with 0 to 6 percent slopes. d. e. f. g. & h . Concur with checklist. 2. Air: a. Short term impacts to air quality occur during construction and paving operations. Construction activity, especially site preparation work, contribute to a short term increase in local suspended particulate levels. Construction activity also contributes to carbon monoxide levels through the operation of construction machinery, the use of trucks to deliver equipment and materials, and worker access to the site by automobile. b. & c. Concur with checklist 3. Water: a. 1. Based on FWCC Section 22-1248, surface water facilities are exempt from the standards of the Environmentally Sensitive Areas chapter if a maintenance plan has been approved by the Public Works Director. In a March 27, 1996 interpretation, the Director of Community Development Services stated that human created surface water ponds are not considered regulated wetlands if they meet six specific criteria. The criteria are: 1) the drainage facility must have been originally constructed on uplands, 2) the facility must be actively operated for use as a surface water drainage facility, 3) the drainage feature must been intentionally human created, 4) wetland conditions have not expanded beyond the originally constructed drainage facility boundary, 5) the drainage facility was not required or designated to fulfill mitigation requirements 3 from previous wetland impacts, and 6) The Director finds that limited functions and values and the intended design of the wetland as a detention facility do not warrant application of the cities wetland regulations. Based on satisfaction of these criteria, Lot 14 and the primary detention pond north of lot 14 are not regulated wetlands. 2. 3. 4. 5. & 6. Concur with checklist. b. 1. & 2. Concur with checklist. c. 1. As with all developed areas, the site will contribute some pollutants to ground and surface waters; as these will be washed off by storm drainage across the site. Compliance with runoff standards of the adopted King County Surface Water Design Manual (KCSWDM) will be determined during the land surface modification process. c. 2. A correctly implemented TESC should not allow storm water contamination. d. Concur with checklist. In addition, exposed soils must be covered during all construction phases. 4. Plants: a. b. & c. Concur with checklist. d. Concur with checklist. The proposed hydroseeding will be reviewed during the land surface modification permit process. 5. Animals: a. b. c. & d. Concur with checklist. 6. Energy and Natural Resources: a. b. & c. Concur with checklist. 7. Environmental Health: a. 1. & 2 Concur with checklist. b. 1. & 2. Concur with checklist. S. Land and Shoreline Use: a. Current uses of the site and surrounding area include the following: 4 Site: Vacant. North: South 324th Street, Mixed use commercial South: Retail car dealership East: Mixed use commercial West: Vacant land, City Park b. c. & d. Concur with checklist. e. The lot is zoned Community Business (BC) f. The comprehensive plan designation is Community Business g. h. I. j . & k. Concur with checklist. 1. This SEPA application and the associated land surface modification do not reflect a proposed use. Once a use is proposed, the subsequent application(s) will be reviewed for conformance with various FWCC codes, including zoning, landscaping and design guideline standards. 9. Housing: a. b. & c. Concur with checklist. 10. Aesthetics: a. b. & c. Concur with checklist. 11. Light and Glare: a. b. c. & d. Concur with checklist. 12. Recreation: a. b. & c. Concur with checklist. 13. Historic and Cultural Preservation: a. b. & c. Concur with checklist. 14. Transportation: a. b. c. d. e. f. & g. Concur with checklist. 5 15. Public Services: a. & b. Concur with checklist. 16. Utilities: a. & b. There is a BPA easement on the north eastern portion of the site. C. CONCLUSION: The proposal can be found to not have a probable adverse impact on the environment pursuant to a mitigated determination of non -significance (DNS) The DNS is based on the impacts identified within the environmental checklist, attachments and the above 'FINAL STAFF EVALUATION FOR ENVIRONMENTAL CHECKLIST APPLICATION #SEP96-0039' and are supported by the findings attached, plans, policies, and regulations formally adopted by the City of Federal Way for the exercise of substantive authority under SEPA to approve, condition, or deny proposed actions. The city reserves the right to review any future revisions or alterations to the site or to the Proposal in order to determine the environmental significance or non -significance of the project. Prepared by: W=L Date: March 10- 1997 sepafde\centurylsepamal.doe n � I••'i-•;ter. - .�.-:•;s.',•r•v4:: _;iY;c-� f.� '.,,at'ru-t w,u;.��Y �.e w• �' .� _ Has _ 3Yas saox3nans arm If sa33Nar3 vna l ONI 'SONIHOIIH V 030H 'Hsne aL p p p 2 Lu p F U 5 -��< 3 p I Z Z G URN- W 8f w RM rA A1M107 d1M AYIII lYl[1Qif' t S31tlYJOSSV 38vnos A?jn1N3O C n (NOISmm /.inovi nuois) AWILN30 -40 lYfd—bl 101 a " NVId 30VNIV80 PP 9NIOVHD N f � nit wwls ...,. CITY OF 0_ �• 33530 1 ST WAY SOUTH March 10, 1997 Mr. Chris Leady, Century Square Associates 2000 - 124th Ave NE Bellevue, WA 98005 RE: ENVIRONMENTAL THRESHOLD DETFIUMINATION (206)661-4000 FEDERAL WAY, WA 98003-6210 APPLICATION NO: SEP 96-0039 PLAT OF CENTURY, LOT 14, STORM FACILITY REVISION 1401 South 324th Street Federal Way, WA Dear Mr. Leady: The Environmental Checklist you have submitted has been reviewed by this office and other City staff. We have determined that the proposal will not have a probable significant adverse impact on the environment. As a result, an Environmental Impact Statement (EIS) is not required to comply with the State Environmental Policy Act (SEPA). A copy of this determination is enclosed. A fifteen (15) day comment period is required by the SEPA Rules (WAC 197-11-340). A notice inviting comments will be published in the Federal Way News on March 15, 1997. At the end of the comment period, the Department will determine if the DNS should be withdrawn, modified, or issued as proposed. All final determinations may be appealed within 14 days following the comment deadline. No licenses, permits or approvals will be issued until completion of the appeal period. Our decision not to require an EIS does not mean that the license, permit or approval you are seeking from the City has been granted. Approval or denial of the proposal will be made by the appropriate administrative or legislative body vested with that authority. The environmental record is considered by the decision maker(s) and conditions will be imposed to reduce identified environmental impacts as long as the conditions are based on adopted and designated City policy. After a final decision has been made on your proposal (i.e., after a permit has been issued or City Council action taken, as applicable), you may, but are not required to, publish a Notice of Action as set forth in RCW 43.21C.075. The Notice of Action sets forth a time period after which no legal challenges regarding the proposal's compliance with SEPA can be made. A copy of the Notice of Action form and copies of RCW 43.21C.080 and WAC 197-11-680 providing instructions for giving this notice are available from the Department of Community Development. The City is not responsible for publishing the Notice of Action. However, the City is responsible for giving a notice (to parties of record) stating the date for commencing a judicial appeal (including the SEPA portion of that appeal) if your proposal is one for which the City's action on it has a specified time period within which any court appeals must be made. If you need further assistance, feel free to contact Deb Barker, Associate Planner, at 661- 4103. Sincerely, . 71M�'Le Grego re, AICP Directo of ommunity Development Services enc: Staff evaluation DNS sepafile\century\dnsletter.txt CITY OF 4 X �� (206) 661-0 33530 1ST WAY SOUTH FEDERAL WAY, WA 98003-6216210 May 13, 1997 Mr. Hal Hagenson Bush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, WA 98102 RE: Plat of Century Storm Facility Land Surface Modification 1401 South 324th Street Federal Way File Nos. LSM 96-0003, SEP 96-0039, UPR 96-0060 Dear Mr. Hagenson: The Surface Water Management Division of the Public Works Department has completed an initial technical review of the proposed land surface modification request for lot 14 of the Plat of Century. The following review comments must be addressed prior to continuation of the land surface modification request. 1. The down stream analysis has not been satisfactorily completed, as discussed between yourself and Mr. Fei Tang, SWM Engineer, on March 18, May 6, 9, and 13, 1997, and based on the revised TIP, dated April 1,1997, and the April 26, 1997 faxed supplemental TIR Downstream capacity must be satisfactorily determined before LSM approval can be considered With this letter, the 120 day time line for project approval has stopped The 120 day clock will re -start when we determine the additional information submitted by you satisfies this request for additional information or fourteen days after the additional information has been submitted to the City, whichever comes first. Please be advised that the Planning and Public Works Engineering Departments may have additional review comments at a later date. To assure that your permit proceeds in a timely manner it is in your best interest to submit a complete package of any required information as soon as possible. Permits requiring additional information are generally handled on a first-come/first-serve basis. Please contact me at (206) 661-4019 if you have any questions or if I can be any assistance.. Sincerely, Deb Barker Associate Planner C: Fei Tangi Gary Bamett file spr\centurylstopclkl.ltr AFFIDAVIT OF PUBLICAI ION No. F46 STATE OF WASHINGTON ) COUNTY OF KING ) ss. I, Marjorie Wooster, being first duly sworn on oath deposes and says: That she is the Administration/Human Resources Director of The Federal Way News, a bi-weekly newspaper which is now and at all times herein mentioned has been published and printed in an office maintained at the place of publication at Federal Way, King County, Waslington, that by order of the Superior Court of the State of Washington in and for King County, said newspaper is now and at all times mentioned herein has been approved as a legal newspaper for the publication of any advertisement, notice, summons, report, proceedings, or other official document required by law to be published, that said newspaper was published regularly at least once each week, in the English language, as a newspaper of general circulation in Federal Way, King County, Washington, at the time of application to the aforementioned Superior Court for approval as a legal newspaper, and was so published for at least six months prior to the date of said publication, and is now and at all times mentioned herein has been so published. That the annexed is a true copy of a Notice by the City of Federal Way, of Land Use Application to Abandon an Existing Interim Storm Water Detention Pond and Facilities and Fill and Grade for Future Development: File Nos. LSM96-0003. UPR96- 0060 SEP96-0039 as it was published in regular issues of said newspapers once each week for a period of one consecutive week(s), commencing on the 25th day of January 1997, and ending on the 25th day of January 1997, both dates inclusive, and that said newspaper was regularly distributed to its subscribers and as a newspaper of general circulation during all of said period. That the full amount of the fee charged for the foregoing publication is the sum of $ 38.50 scribed and sworn to before me this 30th day of Janu , 1997. vi�Y I otary Public in and for the State of Washington Residing at Seattle. My commission expires 06/19/00. NOTICE OF LAND USE APPLICATION The City of Federal Way Community Development _ ices has received a land use application to abandon an ex- isting interim storm water detention Pond and facilities, and fill and grade lot #14, Plat of Century, for future de- veiopmenl. The site is located at 1401 South 312th Street in Federal Way. The file numbers are LSM96-0003. UPS96.0060, and SEP96.0039. The following documents were submitted in conjunction with the application: Envi- ronmental Checklist, Geotechnicai En- gineering Study, Technical Information Report, Topographic Survey, grading and drainage plan, and a plat certifi- cate for lot 14. Plat of Century. This application will be reviewed for compliance with Federal Way City Code: Article VI, Process I; Division 7, Land modifications; and the State En- vironmental Policy Act (SEPA). The application was deemed complete on January 14, 1997. Any person or public agency ex- pressing an interest in this matter is in- vited to submit written comments to Greg Moore, Development Services Director, on or before February 10, 1997. The official file is available for review at Federal Way City Hall, Community Development Services, 33530 First Way South, Federal Way, WA 98003• Written comments may also be sub- mitted to this address. For further in- formation on the above project, con- tact Del) Barker, Associate Planner, at (206) 661-4103. Published in the Federal Way News on January 25, 1997. F46 .AFFID.AYIT OF DISTRIBUTION I �pYY114S t7� hereby declare, under penalty of perjury of the laws of the State of Washington, that: Notice of Application ❑ Notice of Action ❑ Notice of Application for Shoreline Management Permit ❑ Notice of Determination of Significance ❑ Notice of Determination of Non - Significance and Scoping Notice ❑ Notice of Environmental Determination of Non -Significance (SEPA) ❑ Notice, of Environmental Mitigated Determination of Non -Significance (SEPA) ❑ Notice of Proposed Land Use Action ❑ Notice of Public Meeting ❑ Notice of Public Land Use Hearing ❑ Shoreline Management Permit ❑ Official Notice ❑Other ❑Other was mailed/faxed/posted to/at each of following addresses (see other side) on Ow 02q 1W. Project Name File Number(s) Signature_ lad L5MI iC0o3 v�Rv� o0�bo ssr�b-ao35 �— Date �� l APFIDAVLDoc 1Zcviscn 1/4/96 CAI IAA \� F w I?e � %ov%a MEMO: Date: May 27, 1997 To: Fei Tang, City of Federal Way From: Hal Hagenson, Bush, Roed & Hitchings, Re: Lot 14, Century Square In response to your recent comments, we have revised the backwater calculations to show both the 25 year and 100 year events, and have conservatively assumed that pipe run # 1 is 24 " diameter (versus the 40" box that exists for part of the run). All flows are well confined within the system and there is no overtopping, even for the 100 year event. You had inquired about the invert elevations at Manhole 5 and 4 as well as the pipe lengths which we used in the analysis. Starting at manhole #3, the invert is given as 399.69 on Wilsey Ham as Builts. The as built showed a change to the design, and we have scaled the pipe lengths for runs 2 (52 feet) and 1 (73 feet) from those drawings. The existing invert at manhole 5 is shown on the attached Wilsey and Ham Comprehensive Drainage Plan excerpt at elevation 399.0, which we have conservatively assumed applied to the 24" inlet from the west, although a lower outlet invert is shown on that plan and may well apply to the inlet from the west. The as built profile indicates that the run between manhole 4 and 3 (pipe 2) is laid @ 0.5%. Using the scaled length from the as -built, the new invert should be 399.4, and this is the value we have assumed for our analysis. It is important to note that there is only 0.69 feet of fall between manholes 3 & 5. Given that the hydraulic backwater elevation is well above the crown (see backwater profiles) even if manhole 4 elevation is assumed to be as high as 399.69 ( which probably is not the case since line 2 would have to have been laid flat), we believe the analysis is conservative, and clearly demonstrates that the downstream system is more than adequate to support the project. AFFIDAVIT OF PUBL` 1 CATION i f No. F87 STATE OF WASHINGTON ) COUNTY OF KING ) ss. I, Marjorie Wooster, being first duly sworn on oath deposes and says: That she is the Director of Administration/Human Resources for The Federal Way News, a bi-weekly newspaper which is now and at all times herein mentioned has been published and printed in an office maintained at the place of publication at Federal Way, King County, Washington, that by order of the Superior Court of the State of Washington in and for King County, said newspaper is now and at all times mentioned herein has been approved as a legal newspaper for the publication of any advertisement, notice, summons, report, proceedings, or other official document required by law to be published, that said newspaper was published regularly at least once each week, in the English language, as a newspaper of general circulation in Federal Way, King County, Washington, at the time of application to the aforementioned Superior Court for approval as a legal newspaper, and was so published for at least six months prior to the date of said publication, and is now and at all times mentioned herein has been so published. That the annexed is a true copy of a Notice by the City of Federal Way of Environmental DNS for App. No. SEP 96-0039; Lot 14, Plat of Century Storm Facility Revision as it was published in regular issues of said newspapers once each week for a period of one consecutive week(s), commencing on the 15th day of March 1997, and ending on the 15th day of March 1997, both dates inclusive, and that said newspaper was regularly distributed to its subscribers and as a newspaper of general circulation during all of said period. That the full amount of the fee charged for the forego:A;�� ribed and sworn to before me this 27th day of March , 1997. No Public in and for the State of Washington Residing at Seattle. My commission expires 9/19/97. NOTICEgEE RNM iX OFNiA1- lypN-SIGNIFI&s NON -SIGNIFICANCE Federal W ay, W EP 96-0ngton 039 Appticatiun No: 5 Y s-rOPI Jt LOT 14, PLAT OF CENTI3I� FACILITY FtEV'Sld has deter - The City of Federal Way project does mined that the probable adverse not have pEnv impact on the environment. An ronmentat Impact Statement LEIRCW not required under 43,21 C.03%2){c), This decisionletedwo - made after review Of a comp vironmeniai checklist and other infor- mation on file with the city, applicant pro proposed Action'- �' existing intar+m poses to abandon an and facil- storm water detention t�,entot for future ities, and l}lt and grade development, Applicant: Chris LeadY Century Square Associates 20001241h Ave. N Bellevue. WA 98005 Location: Lot 14, plat of Century 140, South 324th Street, Federal way. WA 98003 arcing this ac Further information regarding upon re- tian is avaitable to the ailment quest at the Federal e pevel pm nt A Federal of Community 3 e" Frrst Way South, way City WA 98.043, Contact: Federal Way Planner, la Deb Barker, AssomThs DNS is is Phone: (20fi)661-4103• 5:00 sued under WAG i97-tip 34p[2} Comments must be submitted by p m• On March 31,199i a City,this de Unless moditied by termination will become ny a sloe 9' the comrne t deadline, the City,s i nal determina- grieved by oat with the Cn Lion may flte an app comment within 14 days of the above deadline- Federat Way Dews Published in the F87 on March 15, 1997. W�44 AFFIDAVIT OF DISTRIBUTION = r I y' C Fw hereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Application ❑ Notice of Action ❑ Notice of Application for Shoreline Management Permit ❑ Notice of Determination of Significance ❑ Notice of Determination of Non - Significance and Scoping Notice 2' Notice of Environmental Determination of Non -Significance (SEPA) ❑ Notice of Environmental Mitigated Determination of Non -Significance (SEPA) ❑ Notice of Proposed Land Use Action ❑ Notice of Public Land Use Hearing ❑ Notice of Planning Commission Public Hearing ❑ Shoreline Management Permit ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Land Use Application ❑ Other was mail faze osted to/at each of following addresses (see attached) on 121c c 10 - 1997. Project Name File Number(s) '`�L I��-C� ` Cr Signature Date "�� Ci AmDAvi.Fpw REVISED 1/8/97 neiin/Q7 mnN 17-15 FAX 2066614129 CITY OF FEDERAL WAY [goo] x x� TX REPORT - LTRANSMISSION OK 2593 CONNECTION TEL 92412776 CONNECTION ID ST. TIME 03/10 17:34 USAGE T 00'54 PGS. RESULT 0 CI"I�Y OF ABC�-- 33530 15T WAY SOUTH Mayor Mahlon "Skip" Priest GYty Manager Kenneth E. Nyberg (206) 661-40M FEDERAL WAY, WA 99003-6210 FAX TRANSMITTAL AL MEMORANDUM TO; .r r,Q 1 DATE: I)IL-A to — NUMBER OF PAGES (Including Memo Sheet) ram. FROM: OFFICE OF: RE: Council Members Yaok Dovey Hope Elder Mary Gates Ron Gintz Michael Park Phil Watlaus FAX #: ? % 6 .e - —,-, r 0 -,CL- /;7 NOTICE OF ENVIRONMENTAL DETERMINATION OF NON -SIGNIFICANCE Federal Way, Washington Application No: SEP 96-0039 LOT 14, PLAT OF CENTURY STORM FACILITY REVISION The City of Federal Way has determined that the following project does not have a probable significant adverse impact on the environment. An Environmental Impact Statement (EIS) is not required under RCW 43.21C.030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the City. Proposed Action: The applicant proposes to abandon an existing interim storm water detention pond and facilities, and fill and grade the lot for future development. Applicant: Chris Leady Century Square Associates 2000 - 124th Ave NE Bellevue, WA 98005 Location: Lot 14, Plat of Century 1401 South 324th Street, Federal Way, WA 98003. Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development, Federal Way City Hall, 33530 First Way South, Federal Way, WA, 98003, Contact: Deb Barker, Associate Planner, Phone: (206) 661-4103. This DNS is issued under WAC 197-11-340(2). Comments must be submitted by 5:00 p.m. on March Unless modified by the City, this determination will become final following the comment deadline. Any person aggrieved by the City's final determination may file an appeal with the City within 14 days of the above comment deadline. Published in the Federal Way News on March 150 1997 AFFIDAVIT OF DISTRIBUTION hereby declare, under penalty of perjury of the laws of the State of Washington, th t a: ❑ Notice of Application ❑ Notice of Action ❑ Notice of Application for Shoreline Management Permit ❑ Notice of Determination of Significance ❑ Notice of Determination of Non - Significance and Scoping Notice ur"Notice of Environmental Determination ofNon-Significance (SEPA) ❑ Notice of Environmental Mitigated Determination of Non -Significance (SEPA) ❑ Notice of Proposed Land Use Action ❑ Notice of Public Land Use Hearing ❑ Notice of Planning Commission Public Hearing ❑ Shoreline Management Permit ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Land Use Application ❑ Other wa maile crxedlposted to/at each of following addresses (see attached) on d,Y) I997. Project Name File Number(s) AF_. n t— - Signature -^ AFFmDAvi.Fw REVISED 1/8/97 Date 3 7 CITY OF FEDERAL WAY DEPARTMENT OF COMMUNITYDEVEr-OPMENT SERVICES 33530 Ist Way South, Federal Way, WA 98003 (206) 661-4118 State Environmental Policy Act Determination of Non -significance PLAT OF CENTURY, LOT 14 STORM FACILITY REVISION FEDERAL WAY FILE NO: SEP 96-0039 RELATED FILE NO's: LSM 96-0003, UPR 96-0060 Description of Proposal: The applicant proposes to abandon an existing interim storm water detention pond and facilities, and fill and grade the lot for future development at 1401 South 312th Street, in Federal Way. Proponent: Chris Leady, Century Square Associates 2000 - 124th Ave NE Bellevue, WA 98005 (206) 455-0504 Location: Lot 14, Plat of Century 1401 South 324th Street, Federal Way, WA 98003. Lead Agency: City of Federal Way City Contact: Deb Barker Associate Planner, 661-4103 The responsible Official of the City of Federal Way hereby makes the following decisions based upon impacts identified in the environmental checklist, the Federal Way Comprehensive Plan, the final staff evaluation for this action, and other municipal policies, plans, rules, and regulations designated as a basis for exercise of substantive authority under the Washington State Environmental Policy Act Rules pursuant to R.C.W. 43.31C.060. 1. The lead agency for this proposal has determined that it does not have probable significant adverse impact on the environment, and an Environmental Impact Statement (EIS) is not required under R.C.W. 43.21C.032(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. This information is available to the public on request. This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for 15 days from the date of issuance. Comments must be submitted by 5:00 p.m. on Mardi -IL 1997. Unless modified by the City, this determination will become final following the above comment deadline. Any person aggrieved of the City's final determination may file an appeal with the City within 14 days of the above comment deadline. Responsible Official: Gregory D. Moore, AICP Position/Title: Director of Community Development Services Address: 33530 First Way South, Federal Way, WA 98003 Date Issued: March 15, 1997 Signature: fur, a.n wm vxrwr mu.�.+nonrsn .��0°siic toou cr - wrptwrwa ��(rI FA/IlY3 0��41'] ATFIDAWT OF DISTRIBUTION I 1 hereby declare, under penalty of perjury of the laws o the ,State of Washington, that: ❑ Notice of Application ❑ Notice of Action ❑ Notice of Application for Shoreline Management Permit ❑ Notice of Determination of Significance ❑ Notice of Determination of Non - Significance and Scoping Notice z Notice of Environmental Determination of Non -Significance (SEPA) ❑ Notice, of Environmental Mitigated Determination of Non -Significance (SEPA) ❑ Notice of Proposed Land Use Action ❑ Notice of Public Meeting ❑ Notice of Public Land Use Hearing ❑ Shoreline Management Permit ❑ Official Notice ❑Other ❑Other was mailed/faxed/6o�st4 to0each of following addresses (see other side) on 1991t Project Name 0 j-�- rm Ea ��,v feyis'L File Number(s) , �p —C,) -3 ® LSD+ C jo-0003 �xOro O Signature^ t Date ArrIDAVI-Doc REVISED 1/4/96 . Oafy 42-1 4 i CITY OF 4 (206) 661-0 33530 1ST W) FEDERAL WAY, WA 98003-6216210 AFFIDAVIT OF DISTRIBUTION hereby declare, under penalty of perjury of the laws of the State of Washinglo , that a: ❑ Notice of Application ❑ Notice of Action ❑ Notice of Application for Shoreline Management Permit ❑ Notice of Determination of Significance ❑ Notice of Determination of Non - Significance and Scoping Notice Er"'NNotice of Environmental Determination of Non -Significance (SEPA) ❑ Notice of Environmental Mitigated Determination of Non -Significance (SEPA) ❑ Notice of Proposed Land Use Action ❑ Notice of Public Land Use Hearing ❑ Notice of Planning Commission Public Hearing ❑ Shoreline Management Permit ❑ 'Notice of Public Hearing before the Hearing Examiner ❑ Notice of Land Use Application ❑ Other ►v • rrrailedl edlposted to/at each of following addresses (see attached) on 4a v- 1997. Project Name 01 File Number(s) Signature AFFJ)Av[.FRm REVISED 3/14/97 Date 3 ` `{ -.` ? JOE HENRY DEPT OF ECOLOGY FISH & WILDLIFE SERVICE NATURAL RESOURCES CVN SVC ENVIRON RVIEW SECT ECOLOGICAL SRV DIVISION 935 POWELL AVE SW PO BOX 47703 3704 GRIFFIN IN SE STE 102 RENTON WA 98055 OLYMPIA WA 98504-7703 OLYMPIA WA 98501 DEPT OF HEALTH FEDERAL WAY AIRDUSTRIAL CENTER BLDG 2 LAKEHAVEN UTILITY DIST FIRE DISTRICT #39 PO BOX 47820 PO BOX 4249 31617 - 1 ST AVE S OLYMPIA WA 98504-7820 FEDERAL WAY WA 98063 FEDERAL WAY WA 98003 MUCKLESHOOT INDIAN TRIBE PLANNING DEPARTMENT PUYALLUP INTERNATIONAL PUYALLUP TRIBE 39015 - 172ND AVE SE 3702 MARINE VIEW DR NE 2002 E 28TH ST AUBURN WA 98002 TACOMA WA 98422 TACOMA WA 98404 OFFICE MANAGER PAT PROUSE KATHY LARSON WASHINGTONNATURAL GAS US WEST PUGET POWER 1400 W MAIN ST 450 - 110TH NE RM 409 2020 S 320TH ST BLDG A STE M AUBURN WA 98001-5201 BELLEVUE WA 98004 FEDERAL WAY WA 98003 BONNEVILLE POWER ADMIN VICTOR GONZALES TACK HOPKINS OFFICE OF ENVIRONMENT - AJ TACOMA NEWS TRIBUNE SEATTLE PI 905 NE 11THAVE 32050 - 23RD S 101 ELLIOTT AVE W PORTLAND OR 97232 FEDERAL WAY WA 98003 SEATTLE WA 98121 NANCY BARTLEY SEAN MCCARTHY JOHN KIM SEATTLE TIMES FEDERAL WAY NEWS KOREA POST PO BOX 70 533 S 336TH ST STE C 1804 S 324TH PL SEATTLE WA 98111 FEDERAL WAY WA 98003 FEDERAL WAY WA 98003 FEDERAL WAY HAL HAGENSON CHAMBER OF COMMERCE BUSH ROED & HITCHINGS PO BOX 3440 2009 MINOR AVE E FEDERAL WAY WA 98063 SEATTLE WA 98102 CITY OF FEDERAL WAY DEPARTMENT OF COMMUNITYDEVELOPMENT SERVICES 33530 Ist Way South, Federal Way, WA 98003 (206) 661-4118 State Environmental Policy Act Determination of Non -significance FLAT OF CENTURY, LOT 14 STORM FACILITY REVISION FEDERAL WAY FILE NO: SEP 96-0039 RELATED FILE NO's: I-SM 96-0003, UPR 96-0060 Description of Proposal: The applicant proposes to abandon an existing interim storm water detention pond and facilities, and fill and grade the lot for future development at 1401 South 312th Street, in Federal Way. Proponent: Chris Leady, Century Square Associates 2000 - 124th Ave NE Bellevue, WA 98005 (206) 455-0504 Location: Lot 14, Plat of Century 1401 South 324th Street, Federal Way, WA 98003. Lead Agency: City of Federal Way City Contact: Deb Barker Associate Planner, 661-4103 The responsible Official of the City of Federal Way hereby makes the following decisions based upon impacts identified in the envirorimenW checklist, the Federal Way Comprehensive Plan, the final staff evaluation for this action, and other municipal policies, plans, rules, and regulations designated as a basis for exercise of substantive authority under the Washington State Environmental Policy Act Rules pursuant to R.C.W. 43.31C.060. The lead agency for this proposal has determined that it does not have probable significant adverse impact on the environment, and an Environmental Impact Statement (EIS) is not required under R.C_W. 43.21C.032(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. This information is available to the public on request. This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for 15 days from the date of issuance. Comments must be submitted by 5:00 pm. on March 31. IM. Unless modified by the City, this determination will become final following the above comment deadline. Any person aggrieved of the City's final determination may file an appeal with the City within 14 days of the above comment deadline. Responsible Official: Gregory D. Moore, AICP Position/Title: Director of Community Development Services Address: 33530 First Way South, Federal Way, WA 98003 Date Issued: March 15, 1997 Signature: CITY OF FEDERAL WAY DEPARTMENT OF COMMUNITYDEVELOPMENT FINAL STAFF EVALUATION FOR ENVIRONMENTAL CHECKLIST PLAT OF CENTURY, LOT 14 STORM FACILITY REVISION FEDERAL WAY FILE NO: SEP 96-0039 RELATED FILE NO's: LSM 96-0003, UPR 96-0060 ,Xli H�� Exhibit A Reduced Scale site plan. Exhibit B Vicinity Map. Exhibit C SEPA checklist dated December 5, 1996. I. 11NIMA I' OF Pit FT) A TI N The applicant proposes to abandon an existing interim storm water detention pond and facilities, and fill and grade the lot for future development at 1401 South 312th Street, in Federal Way. (Exhibit A). H. GENERAL INFORMATION Project Name: Plat of Century Lot 14 Storm Facility Revision Applicant: Century Square Associates Contact: Chris Leady, Century Square Associates 2000 - 124th Ave NE Bellevue, WA 98005 (206) 455-0504 Location: Lot 14, Plat of Century 1401 South 324th Street, Federal Way, WA 98003, (Exhibit B). S-T-R: NW 17-21-04 Parcel Size: 49,900 square feet Zoning: BC, Community Business Comprehensive Plan Designation: Community Business NOTE: Technical reports and attachments referenced below may not be attached to all copies of this decision. Copies of exhibits, reports, attachments, or other documents may be reviewed and/or obtained by contacting the Department of Community Development Services, 33530 1st Way South, Federal Way, Washington, 98003, phone (206) 661-4118. The following information was submitted as part of the application for development: a Topographic Survey prepared by Bush Roed and Hitchings dated October 1996 • Environmental SEPA checklist dated 12/5/96, a Geotechnicial Engineering Study prepared by Geo Group Northwest, Inc, dated November 25, 1996 • Plat certificates for lot 14 prepared by Stewart Title dated December 4, 1996 c TIR by Bush Roed and Hitchings dated December 11, 1996. a Grading & drainage plan prepared by Bush Roed and Hitchings dated December 5, 1996 a Correspondence from Hal Hagenson to the City of Federal Way dated December 6, 1996 At the creation of the fourteen lot Plat of Century in 1974, lot 14 was established as an interim storm drainage facility. The face of the plat states "Lot 14 is subject to a temporary storm drainage easement, said easement to expire when an adequate drainage pipe system is constructed in Pacific Highway South eliminating the requirements for a retention basin on this lot." In the summer of 1996, the City of Federal Way began construction of the Kitts Corner/So. 336th Regional Stormwater Detention facility. This facility was designed to provide regional stormwater detention for the city and is sized to accommodate the drainage currently handled by the Plat of Century lot 14 drainage facility. The Kitts Corner/So.336th project is 90 percent complete. Upon completion of the city project and issuance of the land surface modification approval for plat of Century lot 14, the drainage easement can be administratively removed by the Director of Community Development Services. The applicant submitted a land surface modification application (in conjunction with Use Process I) and SEPA checklist on December 16, 1996. The Community Development Review Committee (CDRC) reviewed the proposal on January 2, 1997. The checklist was determined complete on January 15, 1997. IV. E.NVTRONMENTAI, CHECKL1T The following lists the elements of the Environmental Checklist and a response to each: 1. Whether city staff concurs or does not concur with the applicant response to the SEPA checklist item, or 2. City staff's additional comments or clarification to each checklist item. 2 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. & 12. Concur with Checklist. 1. Earth: Pursuant to WAC 197-11-340(2), the City of Federal Way is required to send any DNS which may result from this environmental review, along with the checklist, to DOE, the U.S. Army Corps of Engineers, other agencies with jurisdiction, affected tribes, and interested parties. TFierefore, the city will not act on this proposal for 15 days after the DNS issuance. a. & b. Concur with checklist. c. The 1973 USDA Soil Conservation Service's (SCS) "Soil Survey for the King County Area" classifies the soils as EwC, Everett-Alderwood gravelly sandy loams with 0 to 6 percent slopes. d. e. f. g. & h . Concur with checklist. 2. Air: a. Short term impacts to air quality occur during construction and paving operations. Construction activity, especially site preparation work, contribute to a short term increase in local suspended particulate levels. Construction activity also contributes to carbon monoxide levels through the operation of construction machinery, the use of trucks to deliver equipment and materials, and worker access to the site by automobile. b. & c. Concur with checklist 3. Water: a. 1. Based on FWCC Section 22-1248, surface water facilities are exempt from the standards of the Environmentally Sensitive Areas chapter if a maintenance plan has been approved by the Public Works Director. In a March 27, 1996 interpretation, the Director of Community Development Services stated that human created surface water ponds are not considered regulated wetlands if they meet six specific criteria. The criteria are: 1) the drainage facility must have been originally constructed on uplands, 2) the facility must be actively operated for use as a surface water drainage facility, 3) the drainage feature must been intentionally human created, 4) wetland conditions have not expanded beyond the originally constructed drainage facility boundary, 5) the drainage facility was not required or designated to fulfill mitigation requirements from previous wetland impacts, and 6) The Director finds that limited functions and values and the intended design of the wetland as a detention facility do not warrant application of the cities wetland regulations. Based on satisfaction of these criteria, Lot 14 and the primary detention pond north of lot 14 are not regulated wetlands. 2. 3. 4. 5. & 6. Concur with checklist. b. 1. & 2. Concur with checklist. c. 1. As with all developed areas, the site will contribute some pollutants to ground and surface waters; as these will be washed off by storm drainage across the site. Compliance with runoff standards of the adopted King County Surface Water Design Manual (KCSWDM) will be determined during the land surface modification process. c. 2. A correctly implemented TESC should not allow storm water contamination. d. Concur with checklist. In addition, exposed soils must be covered during all construction phases. 4. Plants: a. b. & c. Concur with checklist. d. Concur with checklist. The proposed hydroseeding will be reviewed during the land surface modification permit process. 5. Animals: a. b. c. & d. Concur with checklist. 6. Energy and Natural Resources: a. b. & c. Concur with checklist. 7. Environmental Health: a. 1. & 2 Concur with checklist. b. 1. & 2. Concur with checklist. 8. Land and Shoreline Use: a. Current uses of the site and surrounding area include the following: 4 Site: Vacant. North: South 324th Street, Mixed use commercial South: Retail car dealership East: Mixed use commercial West: Vacant land, City Park b. c. & d. Concur with checklist. e. The lot is zoned Community Business (BC) f. The comprehensive plan designation is Community Business g. h. I. j . & k. Concur with checklist. 1. This SEPA application and the associated land surface modification do not reflect a proposed use. Once a use is proposed, the subsequent application(s) will be reviewed for conformance with various FWCC codes, including zoning, landscaping and design guideline standards. 9. Housing: a. b. & c. Concur with checklist. 10. Aesthetics: a. b. & c. Concur with checklist. 11. Light and Glare: a. b. c. & d. Concur with checklist. 12. Recreation: a. b. & c. Concur with checklist. 13. Historic and Cultural Preservation: a. b. & c. Concur with checklist. 14. Transportation: a. b. c. d. e. f. & g. Concur with checklist. 4 15. Public Services: a. & b. Concur with checklist. 16. Utilities: a. & b. There is a BPA easement on the north eastern portion of the site. C. CONCLUSION: The proposal can be found to not have a probable adverse impact on the environment pursuant to a mitigated determination of non -significance (DNS) The DNS is based on the impacts identified within the environmental checklist, attachments and the above 'FINAL STAFF EVALUATION FOR ENVIRONMENTAL CHECKLIST APPLICATION #SEP96-0039' and are supported by the findings attached, plans, policies, and regulations formally adopted by the City of Federal Way for the exercise of substantive authority under SEPA to approve, condition, or deny proposed actions. 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OF. .,.-,. 4 ENVIRONMENTAL CHECKLIST Purpose of Checklist: 56-Pl6-al9 Ale � lst/� The State Environmental Policy Act (SEPA), Chapter 43.21C RCW, requires all governmental agencies to consider the environmental impacts of a proposal before making decisions. An environmental impact statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help you and the agency identify impacts from your proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help the agency decide whether an EIS is required. Instructions for Applicants: This environmental checklist asks you to describe some basic information about our proposal. Governmental agencies use this checklist to determine whether the environmental impacts of your proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most precise information known, or give the best description you can. You must answer each question accurately and carefully, to the best of your knowledge. In most cases, you should be able to answer the questions from your own observations or project plans without the need to hire experts. If you really do not know the answer, or if a question does not apply to your proposal, write "do not know" or "does not apply." Complete answers to the questions now may avoid unnecessary delays later. Some questions ask about governmental regulations, such as zoning, shoreline, and landmark designations. Answer these questions if you can. If you have problems, the governmental agencies can assist you. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. Page I 0} At. tVA' L:,J;_ iNG 0`JT Use of Checklist for Non -project Proposals: Complete this checklist for non -project proposals, even though questions may be answered "does not apply." In addition, complete the Supplemental Sheet for Non -project Actions (part D). For non -project actions, the references in the checklist to the words "project," "applicant," and "property or site" should be read as "proposal," "proposer," and "affected geographic area," respectively. EVALUATION FOR AGENCY USE ONLY A. BACKGROUND 1. Name of proposed project, if applicable: Lot 14, Plat of Century, Storm Facility Revision 2. Name of applicant: Century Square Associates 3. Address and phone number of applicant and contact person: Chris Leady Century Square Associates 2000 - 124th Ave. NE Bellevue, WA 98005 Ph (206) 455-0504 4. Date checklist prepared: December 2, 1996 5. Agency requesting checklist: City of Federal Way 6. Proposed timing or schedule (including phasing, if applicable): Filling and grading is expected to commence in the spring of 1997. The completion date will depend on the availability of fill material. 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. Yes. Ultimately, the site is expected to be developed as a commercial facility, in compliance with pertinent codes and zoning. This development may be done by either the current owner, or the future owner. The current owner has no specific development plans, nor timetable for same. Page 2 Y' W 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. Geotechnical Engineering Study; (November 1996) Geo Group Northwest Inc., Bellevue, WA Phase One Environmental Audit, (October, 1996) Environmental Associates, Inc. Bellevue, WA Topographic Survey, (October, 1996), Bush, Roed & Hitchings, Inc., Seattle, WA Technical Information Report (including level one and level two down stream analysis); (December, 1996), Bush, Roed & Hitchings, Inc. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. Yes. Master Land Use Application, City of Federal Way. for Land Surface Modification, Process One. This application has been submitted concurrently with the SEPA checklist. 10. List any government approvals or permits that will be needed for your proposal, if known. Land Surface Modification Permit, Process One (Grading Permit), City of Federal Way Right of Way Use Permit, City of Federal Way Page 3 ?CHI&IT PAGE:--'I=� or' 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. The proposal includes filling and grading the existing onsite interim stormwater detention pond so that the property can be marketed as a commercially developable parcel. The site consists of about 1.2 acres. The interim stormwater detention pond (currently located on this site) was intended to mitigate impacts on the Highway 99 storm trunk. Once the City's 336th street regional detention facility is constructed and the highway 99 storm trunk restrictor plates removed, the pond and non essential appurtenances can be removed through the appropriate Land Surface Modification Process. These improvements are currently under construction and completion is expected early 1997. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The project is located on South 324th Street, approximately 500 feet west of it's intersection with Highway 99, at 1401 South 324th Street, in Federal Way, Washington. A Boundary and Topographic Survey is submitted concurrently with the Master Use Application. It includes a vicinity map and legal description of the project. B. ENVIRONMENTAL ELEMENTS 1. EARTH a. General description of the site (circle one): Flat, rolling, hilly, steep slopes, mountainous,,other_ A stormwater detention facility occupies the entire site. It is approximately 12 feet deep with 2:1 side slopes Page 4 EXHIERTI-0-a b. What is the steepest slope on the site (approximate percent slope)? Approximately 2:1 (or 50 per cent). C. What general types of soils are found on the site (for example, clay, sand, gravel, peat, mulch)? if you know the classification of agricultural soils, specify them and note any prime farmland. Review of the geotechnical report indicates the soils consist of "loose to medium dense silt and medium dense to dense silty sand underlain by dense to very dense silt, sand and gravel." Surfical deposits consist of weathered native material or sediment from operation of the retention pond. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. No. Casual observations show there are no indications of solifluction, creep, slides or lateral ground movement. However, the on site fill material is unsuitable for foundations per the geotechnical report. No areas of seismic hazard were identified at or near the project site in the King County's Senzi_ ' ip FQ] j fl. The geotechnical report indicates " the dense to very dense silts, sands and gravel encountered in the exploration are not susceptible to liquefaction for the design earthquake." e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. General filling would be conducted to achieve design grades. Unsuitable excavation would be disposed of either in on site non structural areas, or removed from the site. Embankment fills, where required, would be created from imported material. Imported fill material would come from approved sources such as commercial gravel pits or permitted excavation projects. According to calculations provided by Bush, Roed & Hitchings, (civil engineer) earthwork volumes are as follows: Stripping 1,000 Cubic Yards Import fill 12,000 Cubic Yards Page 5I Q URAIC E j- f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Yes. Erosion could occur as a result of the site clearing and construction. Most of the site will be exposed to the elements during construction. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? None of the site will be impervious after completion of the filling operation. Ultimately, however, future commercial development could render about 85 % of the site impervious. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any. The project would be subject to meeting the City's current codes for Erosion Control. These include the best management and practices elements of the King County Surface Water Manual, latest adopted revision. Pending final design approval, gravel construction entrances, silt fencing, erosion control ponds, silt traps, and catch basin filters would be the expected means and methods used to achieve erosion control. 2. AIR a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. Construction related air impacts could include dust generation from site clearing and grading and other construction related activities. Some emissions from construction equipment may also be anticipated. b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. No off site air emission sources have been identified. C. Proposed measures to reduce or control emissions or other impacts to air, if any. Page 6 EXHIBIT PAC E�, C)F.,_, Measures will be instituted to reduce potential emissions during construction. These will include the following as recommended by the Puget Sound Air Pollution Control Agency (PSAPCA): - The site will be periodically wetted to reduce dust. - Dirt will be eliminated on roadways accessing the project site the extent practical. - A street cleaning program will be instituted on roadways accessing the project site. - Dump trucks will have adequate freeboard or will cover loads. - Appropriate seeding/hydro-seeding of disturbed areas will be completed. In addition to the above measures, all wood waste/slash would be chipped, recycled, or hauled to an approved dump site so as not to create adverse emissions. No burning will be allowed. 3. WATER a. Surface. 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? if yes, describe type and provide names. If appropriate, state what stream or river it flows into. Yes. The century plaza primary detention pond is located directly north of the site, across S 324th Street. Its' outfall pipe connects directly to the street storm sewer. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. Yes. Construction would occur as close as 100 feet to the primary detention pond. This pond is man made and not subject to state shoreline jurisdiction. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. No material would be dredged from or placed in the primary detention pond. Page 7 lYN H OT OFF. 3 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. Surface water runoff from the site would be collected in a system of catch basins and piped to the South 324th Street storm sewer. The 24" diameter pipe connection between the site and the primary detention pond would be plugged and abandoned. Consequently, the site will no longer be tributary to the primary detention basin. It is the applicants' opinion that this system would not constitute a drainage diversion. 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. No. According to the King County's the project site does not lie within a 100 year floodplain. 6) : Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. Yes. Some low concentrations of oils, greases, and contaminants associated with construction vehicles on the site may be expected to enter the storm drainage system which eventually discharges to downstream waters. b. Ground. 1) Will ground water be withdrawn, or will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known. No. The proposal will neither withdraw groundwater nor discharge to the groundwater. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. Not Applicable. Page 8 E IT C. Water Runoff (including storm water). 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. Storm water runoff will be collected in a series of catch basins and conveyed by pipes and open ditches to a temporary erosion control pond. From there, the drainage will be piped to the piped stormwater conveyance system lying within South 312th street. 2) Could waste materials enter ground or surface waters? If so, generally describe. Yes. See response to Item 3.a.6 above. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any. See response to Item 3.c.1 above. The surface water runoff from the site will be reduced from current levels due to the increase in pervious surfaces (hydroseeded earth will be substituted for impervious water which has a coefficient of runoff of 1). The temporary erosion control pond will reduce siltation. 4. PLANTS a. Check or circle types of vegetation found on the site. 9 deciduous tree: alder, maple, aspen, other x evergreen tree: fir, cedar, pine, other 9 shrubs O grass O pasture O crop or grain 9 wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other 9 water plant: water lily, eelgrass, milfoil, other 9 other types of vegetation Blackberry, Scotch Broom b. What kind and amount of vegetation will be removed or altered? Essentially all of the on site vegetation will be cleared. It consists primarily of alder saplings, brush, and grasses. No significant trees exist on the site. Page 9 AGE OF C. List threatened or endangered species known to be on or near the site. No threatened or endangered species have been identified on or near the project site. An inventory of endangered flora was not conducted for this project. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any. The site will be hydroseeded after completion of the filling operation. No other planting or landscaping is proposed. 5. ANIMALS a. Circle any birds and animals which have been observed on or near the site or are known to be on or near the site. birds: hawk, heron, eagle, songbirds, other:_ mammals: Mgr, bear, elk, beaver, other: fish: bass, salmon, trout, herring, shellfish, other: b. List any threatened or endangered species known to be on or near the site. No threatened or endangered species have been identified on or near the project site. An inventory of fauna was not conducted for this project. C. Is the site part of a migration route? If so, explain. According to city staff, this site is part of the Pacific Flyway. d. Proposed measures to preserve or enhance wildlife, if any. No preservation nor enhancement measures are proposed. It is the applicants opinion that none are warranted. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. Page 10 .;.,Y The completed project will consist of bare ground. Ultimately, should future commercial development occur, natural gas and electricity will likely be used for heat and power. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No. For potential future commercial development, current building height restrictions and setbacks would make any such impacts virtually impossible. C. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any. No energy conservation is warranted since the project will result in bare ground. For ,potential future commercial development, the building mould likely include insulation, glazing, and energy managements systems in compliance with the Washington State Energy Code as adopted by the City. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. No. The completed project will involve no such risks. The potential future commercial development would need to be reviewed for it's impacts as part of the building permit process. 1) Describe special emergency services that might be required. No special emergency services should be required for the completed filling operation. For the potential future commercial development, normal emergency services from the local fire department, police department and ambulance service would likely be required. 2) Proposed measures to reduce or control environmental health hazards, if any. Page 11 No mitigation measures for environmental health hazards are warranted in the applicants opinion. b. Noise. 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment operation, other)? Some traffic noise exists currently. No quantitative field measurements have been conducted. 2) What types and levels of noise would be created by or associated with the project on a short-term or long-term basis (for example: traffic, construction operation, other)? indicate what hours noise would come from the site. The project would not be expected to increase noise significantly once construction is completed. Project construction would be expected to generate additional noise over the sh r_=tgrm, although the exact amount of increase has not been determined. Noise impacts would be limited to construction periods and would most likely not be significant. The hours of construction activity would comply with the current City noise ordinance. 3) Proposed measures to reduce or control noise impacts, if any. Construction related noise would be reduced by the following: - Compliance with the City's noise ordinance which limits Construction to Monday thru Saturday, 7:OOAM to 8:OOPM - Mufflers and other noise suppression devices will be used. - Idling equipment will be shut off whenever feasible. - Noisiest operations will be scheduled for mid -day where practical. - Noisy operations will be scheduled to reduce concurrence, where practical. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? The site is currently an interim stormwater detention pond, with no structures. A commercial development (restaurant and shops) is located immediately to the east. A new car dealership is located immediately to the south. The area immediately to the west is vacant land owned by -the City on which a small parking and city park are planned for future development. � W b. Has the site been used for agriculture? If so, describe. The site has not been used for agriculture in the last 10 years, to the best of the applicant's knowledge. C. Describe any structures on the site. Not Applicable. No structures exist on the site. d. Will any structures be demolished? If so, what? a9p e. What is the current zoning classification of the site? Y According the information provided by staff, and according to (� the Federal Way Zoning Map, the site is zoned for commercial development. Q_ MOO n i" - --,7- g �, f. What is the current comprehensive plan designation of the site? CpMW-1 BI� >,The Comprehensive Plan designates the site as Business. g. If applicable, what is the current shoreline master program designation of the site? Not applicable. h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. No. Not to the best of the applicant's knowledge. i. Approximately how many people would reside or work in the completed project? T, None. The potential future commercial development would need to be reviewed at the time of building permit application. Page 13 :E" / I SiT -�' j. Approximately how many people would the completed project displace? None. k. Proposed measures to avoid or reduce displacement impacts, if any. Not Applicable. 1. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any. An application for Master Land Use Approval (MLUA)is being made with the City concurrently with SEPA. The intent of the MLUA is to ensure the project's compatibility with respect to zoning, land use, and infrastructure. 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. None. See response to item 8.i above. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income -'` housing. None. C. Proposed measures to reduce or control housing impacts, if any. Not Applicable. No housing impacts are expected. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? Since the project will involve only grading and filling, this question is irrelevant. The potential future commercial development will need to meet codes which will be in effect at the time of application. Page 14 EHMI G i I b. What views in the immediate vicinity would be altered or obstructed? Views of the existing interim detention pond will be altered to the extent that the pond is filled and graded. Ultimately, L/ potential future commercial development may or may not impact views within the vicinity, and will need to be evaluated at the time at which a building permit application is made. C. Proposed measures to reduce or control aesthetic impacts, if any. No aesthetic impact mitigation is planned. The potential future commercial development will need to meet applicable codes at the time of permit application. These may include extensive architectural modulation, sensitive material selection, landscaping and architecturally balanced mass and form to create an attractive structure and grounds. -• 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? The proposed filling and grading operation would create no light nor glare. It is likely that the potential future commercial development would generate direct and reflected low intensity light from interior spaces as seen through windows and glazing. Limited use of low intensity outdoor illumination (on the order of 1 to 5 foot candles average) would be necessary at entrances, stairs, walkways and parking areas. b. Could light or glare from the finished project be a safety hazard or interfere with views? For the potential future commercial development, lighting and glare would be minimal. Impacts to safety and views from light and glare are not expected. C. What existing off -site sources of light or glare may affect your proposal? The existing normal light and glare from surrounding structures is not expected to impact the project. Page 15 0 r__ -A� 3 d. Proposed measures to reduce or control light and glare impacts, if any. For the potential future commercial development, outdoor lighting would be accomplished to minimize glare -with cutoff luminaires or directional lighting to insure that light is directed either inward towards the project or downward toward the target area, and away from neighboring properties. Landscaping will also screen lighting to some extent. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? The area immediately to the west of the site is vacant land owned by the City. The City is in the process of developing this site as a park, including constructing a small parking lot. This facility will provide recreation opportunities for walking, hiking, bird watching or similar activities. b. Would the proposed displace any existing recreational uses? If so, describe. No. There is no evidence of current recreational use on the site, either formal or casual. Further, since the site is surrounded by a 6 foot high chain link fence, access is restricted. C. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any. None 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any places or objects listed on, or proposed for, nation, state, or local preservation registers known to be on or next to the site? If so, generally describe. Unknown. No inventory of historic registers was conducted for the project. Page 16 E XH' B�__ P L: ,m b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. Unknown. C. Proposed measures to reduce or control impacts, if any. None. 14. TRANSPORTATION a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The site fronts South 324th Street. South 324th intersects Highway 99 approximately one block east of the site. One access driveway exists currently. b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? Yes. Highway 99 is a designated bus route. Bus stops currently exist both north bound and south bound near the intersection with South 324th Street. C. How many parking spaces would the completed project have? How many would the project eliminate? The completed filling and grading will provide no formal parking spaces. Parking for any potential future commercial development would need to comply with code requirements in effect at the time of building permit application. d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). No. However, site grading will be configured so that access could potentially be created between the site and the adjoining properties lying to the east, west and south of the project. Page 17 XHI'12;rirft�. CA* - J f "-� t - CL l e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. No. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. No vehicular trips would generated by the proposed project. The potential future commercial development will likely generate vehicular trips. However, the quantity of these trips is currently unknown. g. Proposed measures to reduce or control transportation impacts, if any. No measures are planned. However, for the potential future commercial development, driveways could be aligned to coincide with other drive accesses onto public streets and could be located at reasonable distances from the existing intersection so as to minimize vehicle operational turning movement conflicts. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? if so, generally describe. While the completed filling and grading project would result in no additional public service needs, the potential future commercial project would incrementally increase the need for all public services with the possible exception of schools. b. Proposed measures to reduce or control direct impacts on public services, if any. None. 16. UTILITIES a. Circle utilities currently available at the site: septic system, other (please list). Page 18 b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. Franchise utility service from the power (Puget Power), gas(Washington Natural Gas), telephone (US WEST) and television purveyors(unknown) are available in the immediate vicnity and could be extended to the site in the future. Public water and sewer mains lie within the South 324th Street frontage. A Developer Extension Agreement could be entered into to provide water for domestic and fire protection purposes. A side sewer could be connected to the existing main. Sewer and Water are provided by Lakehaven Sewer District. Since all the utilities exist along the frontage, the majority of construction will be on site. C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Signature: Hai Hagensoft, P.E. Date Submitted: /12' /5/� � Page 19 file:94188/report/SEPA1 CITY OF FEDERAL WAY DEPARTMENT OF COMMUNITYDEVELOPMENT SERVICES 33530 Ist Way South, Federal Way, WA 98003 (206) 661-4118 State Environmental Policy Act Determination of Non -significance PLAT OF CENTURY, LOT 14 STORM FACILITY REVISION FEDERAL WAY FILE NO: SEP 96-0039 RELATED FILE NO's: LSM 96-0003, UPR 96-0060 Description of Proposal: The applicant proposes to abandon an existing interim storm water detention pond and facilities, and fill and grade the lot for future development at 1401 South 312th Street, in Federal Way. Proponent: Chris Leady, Century Square Associates 2000 - 124th Ave NE Bellevue, WA 98005 (206) 455-0504 Location: Lot 14, Plat of Century 1401 South 324th Street, Federal Way, WA 98003. Lead Agency: City of Federal Way City Contact: Deb Barker Associate Planner, 661-4103 The responsible Official of the City of Federal Way hereby makes the following decisions based upon impacts identified in the environmental checklist, the Federal Way Comprehensive Plan, the final staff evaluation for this action, and other municipal policies, plans, rules, and regulations designated as a basis for exercise of substantive authority under the Washington State Environmental Policy Act Rules pursuant to R. C. W. 43.31C.060. The lead agency for this proposal has determined that it does not have probable significant adverse impact on the environment, and an Environmental Impact Statement (EIS) is not required under R.C.W. 43.21C.032(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. This information is available to the public on request. This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for 15 days from the date of issuance. Comments must be submitted by 5:00 p.-m. on March 31, 1997. Unless modified by the City, this determination will become final following the above comment deadline. Any person aggrieved of the City's final determination may file an appeal with the City within 14 days of the above comment deadline. Responsible Official: Gregory D. Moore, AICP Position/Title: Director of Community Development Services Address: 33530 First Way South, Federal Way, WA 98003 Date Issued: March 15, 1997 Signature: _4z"Le-14 ire a.� u,.or .czrw sw�+x fsacu+ra 13 ljunoo if1>» uc. cr - eyrpnrn.e �ILG�1 R41� IAC fO� CITY OF 33530 1 ST WAY SOUTH June 13, 1997 Mr. Hal Hagenson (253) 661-4000 FEDERAL WAY, WA 98003-6210 Bush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, WA 9810 2 RE: Plat of Century Storm Facility Land Surface Modification 1401 South 324th Street Federal Way File Nos. LSM 96-0003, UPR 96-0060 Dear Mr. Hagenson: The Development Review Division of the Public Works Department has completed an initial technical review of the proposed land surface modification request for lot 14 of the Plat of Century. The following review comments must be addressed prior to approval of the land surface modification request. Contact Trent Ward, Engineering Plans Reviewer II, at 661-4132 if you have any questions. Provide a recorded copy of the "Temporary Construction Easement" indicated along the south property line. 2. Revise sediment trap cross section to clearly indicate it discharges to the new Type 1 CB in S. 324th St. It is recommended that 2 sections cut at 90 degrees to one another be provided to adequately detail the trap and outlet structure. 3. Verify elevations of sediment trap, spillway, and berms. The elevations on Cl for the sediment trap do not coincide with those detailed on C3. Sediment trap cross section shall comply with the specifications in the King County Surface Water Design Manual. 4. Temporary construction entrance will encroach onto adjacent lot 15. Revise temporary construction entrance location to the west to eliminate conflicts with adjacent properties and driveways. 5. Where existing pipes are to be abandoned and plugged, they shall be plugged with commercial concrete taking care that the opening of the pipe is completely filled and thoroughly plugged. This information must be depicted on the plans. Hal Hagenson June 13, 1997 page 2 In addition, The TIR revised May 21, 1997 failed to correct a technical error which was pointed out by Fei Tang, SWM Engineer, during a phone conversation on May 9, 1997. Specifically, in the ear runoff calculation, the precipitation should be 3.40 inches instead of 0.43 inches tot for subbasin B-25. While the error will not affect the final conclusion of 'ie T , the error must be corrected for documentation within the TIR report before the land surface modification request can be approved. With this letter, the 120 day time line for project approval has stopped. The 120 day clock Will re -start when we determine the additional information submitted by you satisfies this request for additional information or fourteen days after the additional information has been submitted to the City, whichever comes first. Please be advised that the Planning and Public Works Engineering Departments may have additional review comments at a later date. To assure that your permit proceeds in a timely manner it is in your best interest to submit a complete package of any required information as soon as possible. Permits requiring additional information are generally handled on a first-come/first-serve basis. Please contact me at (253) 661-4103 if you have any questions or if I can be any assistance. Sincerely, kw- Deb Barker Associate Planner c: Fei Tangi Trent Ward file spr\century\stopcloklt2 CITY OF g 33530 1 ST WAY SOUTH July 7, 1997 Mr. Hal Hagenson Bush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, WA 98102 FILE (253) 661-4000 FEDERAL WAY, WA 98003-6210 RE: Approval, Plat of Century Storm Facility Land Surface Modification 1401 South 324th Street Federal Way File Nos. LSM 96-0003, UPR 96-0060 Dear Mr. Hagenson: The Planning and Public Works Departments have concluded their review of your Process I Land Surface Modification application. The proposal to abandon an existing interim storm water detention pond and facilities, and fill and grade the lot for future development at 1401 South 312th Street, in Federal Way, is approved subject to the following conditions. Conditions of Approval - Below are conditions of Land Surface Modification approval established through the city's administrative review process. 1. A grading permit application which shall include recommendations of the geotechnical report shall be submitted for work approved under this Land Surface Modification application. 2. The applicant shall record the July 7, 1997 easement elimination letter from Gregory D. Moore, Director of Community Development Services, against the property before the grading permit shall be issued. A recorded copy of the elimination letter must be submitted for documentation. 3. No clearing, grading or filling activities shall be conducted on the subject property between November and April unless an amended Temporary .Erosion Sedimentation Control plan is approved. A request for reconsideration of this decision may be filed by any person who received a copy of the decision. The request for reconsideration must be filed within seven calendar days after issuance of this decision pursuant to the procedural requirements of FWCC Section 22-396. Pursuant to FWCC Section 22-397 this decision may also be appealed by any person receiving a copy of the decision. The appeal must be in the form of a letter delivered to the Federal Way Department of Community Development Services within fourteen calendar days after issuance Plat of Century LSM Approval July 7, 1997 Page 2 of this decision. The appeal must contain a clear reference to the matter being appealed and a statement of specific factual findings and conclusions of the Director of Community Development Services disputed by the person filing the appeal. Please be advised that no activity may occur based on this decision until the third working day after the time to appeal has expired and a grading and filling/building permit has been issued. If the decision is appealed or if a request for reconsideration is granted, the applicant may not engage in any activity based on the decision until the third working day after the city issues a final decision on the appeal or request for reconsideration. Unless modified or appealed, this approval is valid for a period of one year from the date of approval. A one time extension of up to one year may be granted only if a written request is submitted to the Federal Way Department of Community Development Services pursuant to Federal Way City Code (FWCC) Section 22-409. This decision shall not waive compliance with future city codes, policies and standards relating to this development. it A grading permit is required to perform the work approved through the land surface modification process. The approved grading permit may be issued after the land surface modification appeal period has concluded. As of this date, a grading permit application has not been received. The grading permit should include the following information: 1. Prpyide a copy of the recorded "Temporary Construction Easement" indicated along the south property line. 2. The grading permit shall include specific measures for site revegetation. Specify all proposed seed mixes for hydroseeding or planting on the grading permit sets. 3. Provide a Traffic Control Plan for City approval addressing impacts to traffic on South 324th Street during construction activities. 4. Provide a Construction Schedule which shall reflect the one-time limited opportunity to fill the pond in accordance with the approved plans, permanently stabilize the site, establish permanent erosion and sediment control and establish a regular maintenance schedule for the site (per the TIR Maintenance and Operations Manual). All work must be completed within 120 days of permit issuance to insure that the site remains secure and does not become a dump site. Plat of Century LSM approval July 3, 1997 Page 3 5. Specify limits of work within right-of-way. All restoration work in rights -of -way shall be per the K.C.R.S. and WSDOT Standard Plans. Provide Standard Plan details for patching roadway, restoration of curb and gutter and restoration of sidewalks, etc. on the grading permit sets. A right of way permit is required, a copy is enclosed. 6. See attached "Project Construction Sign Off Checklist" for required prints and bonding. Additionally, complete the attached "Bond Quantity Worksheet" and the applicable bond information sheets. 7. Copies of haul slips and copies of special inspection reports from the geotechnical engineer and/or testing agency shall be provided to the City during construction activities. If you have any questions regarding this decision, please contact Deb Barker, Associate Planner, at (253) 661-4103. Sin r y, Gre Z Mr AICP DirectCo unity Development Services c: Trent Ward, PW Engineering review Dick Mumma, Building Official Deb Barker, Associate Planner Fei Tang, PW Surface Water Engineer e 4 Attachment: Findings of Fact City of Federal Way Department of Community Development Services FINDINGS FOR PROCESS ONE LAND SURFACE MODIFICATION APPROVAL APPLICATION NUMBER UPR96-0060/LSM96-0003 LOT 14, PLAT OF CENTURY Storm Facility Land Surface Modification 1401 South 324th Street Federal Way, WA 98003 The following are findings related to a Process I Land Surface Modification application to perform grading and filling at lot 14, Plat of Century. 1. The applicant proposes to abandon an existing interim storm water detention pond and facilities, and fill and grade lot 14, plat of Century for future development. The lot is 1.2 acres in size and is located at 1401 South 324th Street in Federal Way. 2 Process I Land Surface Modification (ISM) approval is necessary because the proposal is not categorically exempt from LSM permit requirements. 3. An Environmental Determination of Nonsignificance (DNS) was issued for this project on March 15, 1997 under SEP 96-0039. The comment and appeal period for this determination expired April 14, 1997 with no changes or corrections to the city's initial determination. 4. According to the Technical Information Report dated December 1996, storm drainage which flows into lot 14, will be diverted into Kitts Corner Regional Detention facility, which was constructed by the City of Federal Way. Plat of Century easement language which established the temporary storm drainage easement upon lot 14 was administratively eliminated in a July 3, 1997 letter from the Director of Community Development Services. The administrative decision will be recorded against the property. 5. The city may approve an application for land surface modification only if all of the following decisional criteria of FWCC Section 22-1094(c) are met: a. Except as allowed under the zoning code, it will not adversely affect streams, lakes, wetlands or significant trees, either on or off the subject property. 1 Plat of Century LSM findings of fact - July 7, 1997 Page 2 Response: The project site does not contain nor is in proximity to any environmentally sensitive areas. Conclusion: The project will not alter or adversely affect streams, lakes or wetlands. There are no significant trees on the property. b. It will not violate any express policy of the city. Response: The City of Federal Way 1995 Comprehensive Plan (FWCP) contains numerous policies, none of which specifically relate to the proposed land surface modification for reuse of a temporary drainage facility. However, the project does not in any way violate city policy or code. Conclusion: Review of the proposed land surface modification development plans, in conjunction with environmental review, applicable city regulations and permitting authority, will ensure that no violation of city policy will result from the proposed activity. C. It meets at least one of the following criteria: I) It is necessary to correct an erosion or drainage problem on an undeveloped site. Response: Not applicable. ii) It is necessary to create new utility or access corridors. Response: Not applicable. iii) Other unusual circumstances exist which make it reasonable to permit land surface modification in advance of the issuance of a development permit, subdivision or short subdivision approval or shoreline substantial development permit. Response: The unusual circumstance of the project is that according to the easement language on the plat of Century, the detention facility was intended to be temporary and was required to be in operation until such time as sufficient permanent detention facilities could 0 Plat of Century LSM findings of fact July 7, 1997 Page 3 be constructed to handle the flows associated with the associated area. With the completion of the Kitts Corner Regional Detention facility, the interim storm drainage facility can be abandoned and filled, in order to provide a building pad in advance of a land use application which would establish a use for the site. Conclusion: It meets at least one of the required decisional criteria. d. It is consistent with the comprehensive plan. Response: The proposed land surface modification is consistent with policy direction of the FWCP as discussed in item b above. Conclusion: It is consistent with the comprehensive plan. e. It is consistent with all applicable provisions of this chapter. Response: The proposed land surface modification has been reviewed for compliance with the FWCP, pertinent zoning regulations and all other applicable city regulations. Final grade and fill/building plans and technical documents will be reviewed for compliance with specific regulations, conditions or other applicable city requirements. Conclusion: It complies with applicable City of Federal Way provisions. f. 4 _ It is consistent with the public health, safety and welfare. Response: The development plans, in conjunction with environmental review, city regulations and permitting authority, will ensure that all impacts resulting from proposed development are properly addressed. No elements of the proposed land surface modification will impact public health, safety or welfare. Conclusion: It is consistent with public health, safety and welfare. 6. This decision shall not waive compliance with future city codes, policies and standards relating to this project. Prepared by: Deb Barker, Associate Planner Date: July 7, 1997 V CITY OF 33530 1 ST WAY SOUTH Mr. Hal Hagenson Bush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, WA 98102 RE: Easement Elimination, Plat of Century lot i#14 and #15 1401 South 324th Street Federal Way File Nos. LSM 96-0003, UPR 96-0060 Dear Mr. Hagenson: (253) 661-4000 FEDERAL WAY, WA 98003-6210 July 7, 1997 I am in receipt of your December 10, 1996 letter requesting elimination of a temporary storm drainage easements on the above referenced parcels. The easement provisions for Plat of Century lots #14 and #15 states: EASEMENT PROVISION: Lot 14 is subject to a temporary storm drainage easement, said easement to expire when an adequate drainage pipe system is constructed in Pacific Highway South: eliminating the requirement for a retention basin upon this lot. A ten foot wide temporary storm easement and 20 foot wide temporary building setback in lot 15 to expire with lot 14 storm drainage easement. The land surface modification application submitted on December 16, 1996, subsequent environmental analysis and technical review satisfactorily documents the adequacy of the drainage system within Pacific Highway South associated with lot 14. Therefore, based on satisfactory completion of all technical regiiirernetits, the following is determined: Based on the December 10, 1996 request to remove the drainage easement from Lots 14 and 15 of the Plat of Century, and based on the documented adequacy of drainage pipe system constructed in Padif;<c Highway South in conjunction with the Kitts. Corner.Regional Stormwater Detention facility to accommodate the flows associated with the drainage easements, the temporary storm drainage easement is hereby eliminated from lot 14, Plat of Century, and the temporary storm easement and temporary building setback is eliminated from lot 15, Plat of Century. If you have any questions regarding this decision, please contact Deb Barker, Associate Planner, at 661- 4103. Sincerely, Gregory Moo a AICP Director Co nity Development Services c: Dick Mumma, Building Official Deb Barker, Associate Planner Fei Tang, Surface Water Manager Engineer Trent Ward, Public Works Engineering Plans Reviewer l:\spr\century\easeelinLtXt L • I I 2122 - 112th Ave. N.E. Suite B-100 Bellevue, WA 98004 PHASE I ENVIRONMENTAL AUDIT Lot 14 Century Plat South 324th Street Federal Way, Washington CENTURY SQUARE STORAGE ASSOCIATES RECEIVED OCT 0 8195� BUSH, ROED & HITCHINGS INC. NMENTAL .IATES, INC. Spencer, M.Sc. President (206) 399-6041 (206)455-9025 FAX: (206) 455-2316 -A C I It,' CI T Y OF FCt7r; F..iiii.f]1111G CY��T. I I ENVIRONMENTAL ASSOCIATES, INC. 2122 - 112th Avenue North East, Suite B-100 Bellevue. Washington 98004 (206) 399-6041 (206) 455-9025 FAX. (206) 455-2316 October 3, 1996 JN 6380 Century Square Storage Associates 2000 124th Avenue Northeast Bellevue, Washington 98005 Attention: Chris Leady Subject: PHASE I ENVIRONMENTAL. AUDIT Lot 14 of Century Plat South 324th Street Federal Way, Washington Dear Mr. Leady: Environmental Associates, Inc. has completed -a Phase I Environmental Audit of the property located at South 324th Street in Federal Way, Washington. This report, prepared in accordance with the terms of our proposal dated September 11, 1996, and in a manner generally consistent with the intent and methodologies of ASTM E 1527-94 "Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process", summarizes our approach to the project along with results and conclusions. The contents of this report are confidential and are intended solely for your use and those of your representatives. Four copies of this report are being distributed to you. No ether distribution or discussion of this report will take place without your prior approval in writing. Additional copies are available for a small fee. Relying solely upon the information reviewed or otherwise developed in the course of our study, it appears that the property is free from contamination by potentially hazardous, dangerous, or toxic materials. Associate Offices: Oregon / San Francisco Bay Area Century Square Storage Associates JN 6380page - 2 October 3, 1996 We appreciate the opportunity to be of service on this do not hesitate gtn contact usent. if u have any questions or if we may be of additional service, please Respectfully submitted, ENVIRONMENTAL ASSOCIATES, INC. Don W. Spencer, M.Sc., P.G., R.E.A. Principal EPA -Certified Asbestos Inspector/Management Planner I.D. # AM 48151 Registered Site Assessor/Licensed UST Supervisor Washington Department of Ecology State Certification # 947458636 License: W000010 (Washington) License: 11464 (Oregon) License: 876 (California) I E 1 I 4 ENVIRONMENTAL ASSOCIATES, INC. PHASE " 1 " ENVIRONMENTAL AUDIT Lot 14 of Century Plat South 324th Street Federal Way, Washington Prepared for: Century Square Storage Associates 2000 124th Avenue Northeast Bellevue, Washington 98005 Questions regarding this investigation, the conclusions reached and the recommendations given should be addressed to one of the following undersigned. David Bair Environmental Engineer EPA -Certified AHERA Asbestos Building Inspector I.D. No. J&J960222-BIR-06 Don W. Spencer, Sc., P.G., R.E.A. Principal EPA -Certified Asbestos Inspector/Management Planner I.D. # AM 48151 Registered Site Assessor/Licensed UST Supervisor Washington Department of Ecology State Certification # 947458636 License: W000010 (Washington) License: 11464 (Oregon) License: 876 (California) IReference Job Number: 6380 October 3, 1996 A ENVIRONMENTAL ASSOCIATES, INC. TABLE OF CONTENTS METHODOLOGY/SCOPE OF WORK .............. • • .. • • • • • . 5 6 FINDINGS................................................... 6 1 General Description .......................... 7 Geologic Setting . • • • • ... • ....... • • " ' .... ................ Development History and Land Use ...... ........ ..... Property Conveyance/Ownership Data ... : : : 9 Site Reconnaissance ............... :. • • . 10 Check For PCB -Containing Materials Radon Evaluation ............................ . 11 Water Supply, Waste Water and Solid Waste Management ............. Electromagnetic Fields ......... • • • • . • . • ......... .. Review: Washington DOE Listing Of Underground Storage Tanks 12 Review: EPA & State Records Of Potentially Hazardous Sites ........... 14 14 Superfund.......................................... MTCA......................... .......... .I........ RCRA/FINDS I.. 15 ..................................... ERNS...................................... 17 Review: Landfill Documents .................................. 18 CONCLUSIONS ............................................ 18 LIMITATIONS ................................................ 19 REFERENCES ................................................ PLATES Plate 1 - Vicinity Map Plate 2 - Site Photographs Plate 3 - Site Plan Plate 4 - Topographic Map ENVIRONMENTAL ASSOCIATES, INC. Century Square Storage Associates page - JN 6380 0 October 3, 1996 METHODOLOGY/SCOPE OF WOR v<: Our study approach consisted of completing a series of investigative tasks intended to satisfy the level of effort often referred to as "due diligence" by the "innocent purchaser" in the context of the Superfund Amendment and Reauthorization Act of 1986 (SARA), and nearly identical requirements set forth in the Model Toxics Control Act (MTCA), Chapter 70.105 D (Section 040) RCW pertaining to standards of liability. The objective of a Phase I audit is to minimize potential future liability for environmental problems by demonstrating that at the time of acquisition or refinancing, the owner, buyer, or lender had no knowledge or reason to know that any hazardous substance had been released or disposed of on, in, or at she property. In an effort to evaluate condition and previous uses of the property in a manner consistent with good commercial and customary practice and in general accordance with methods outlined under ASTM E 1527-94 Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process", our scope of work for this study included: Review of chronology of ownership and site history using the resources of the King County Assessor's Office, the King County branch of the Washington State Archives, and aerial photography as primary resources. This included an attempt to identify former uses or tenants presenting some potential for generating sta a and federal lawsmay and regularions defined b dangerous or hazardous substances as y s Acquisition and review of available reports and other documentation pertaining to the subject site or nearby sites. • A reconnaissance of the subject property and neighboring areas to look for evidence of potential contamination in the form of soil stains, odors, vegetation stress, discarded drums, discolored water, careless manufacturing or industrial practices, etc. • Risk evaluation for natural -occurring radon. 1 Review of the current EPA Comprehensive Environmental Response, Compensation, and Liability Information System (CERCLIS), the EPA National Priority List (NPL), the EPA Resource Conservation and Recovery Act (RCRA) Notifiers, and Emergency Response Notification System (ERNS) lists of sites which are potentially contaminated or which produce hazardous substances as a normal part of their commercial operation in the vicinity of the site. I I ENVIRONMENTAL ASSOCIATES, INC. Century Square Storage Associates JN 6380 October 3, 1996 Page - 6 • Review of the current Washington Department of Ecology (WDOE) Site Management Information System list of potentially contaminated sites which have been the subject of hazardous waste investigation and/or cleanup activity in conjunction with the Washington Model Toxics Control Act (MTCA) Chapter 173-340 WAC. ■ Review of the current WDOE listing of underground storage tanks (USTs) along with the WDOE's Leaking Underground Storage Tank (LUST) listing for WDOE-documented leaking USTs in the vicinity of the subject property. • Review of documents from the WDOE and the Seattle -King County Department of Public Health regarding current and abandoned landfills. • Preparation of a summary report which documents the audit process and findings. FINDINGS GENERAL DESCRIPTION The subject property consists of a rectangular -shaped parcel of land covering approximately 1.23 acres (53,646 square feet) that is graded as a storm water detention pond. Currently the property is unoccupied and undeveloped. The approximate location of the site is shown on the Vicinity Map, Plate 1, appended herewith. The property is located in a business and commercial area approximately one quarter mile southwest of the SeaTac Mall in Federal Way, Washington. Photographs reflecting the character of the subject property are provided with this report as Plate 2. A brief description of land use on nearby parcels is provided below. The Site Plan, Plate 3, depicts the setting of the subject property and land use for adjacent sites. North: The subject property is bordered to the north by South 324th Street. Farther north is a two-story commercial building whose tenants include the Department of Licensing, financial services companies, a dance studio, an insurance office, and a chiropractic clinic. The centerline of a Bonneville Power Administration (BPA) right-of-way for 230 kilovolt (kV) and 500 kV transmission lines lies just to the north of the subject property, with its southern edge falling onto the subject property. I ENVIRONMENTAL ASSOCIATES, INC. Century Square Storage Associates JN 6380 October 3, 1996 Page - 7 East: To the east of the subject property is a commercial building whose tenants include a restaurant, a car stereo dealer, a home appliance dealer, a window coverings store, and an auto parts store. Farther east is Pacific Highway South (Highway 99). South: Immediately to the south of the subject property is an automobile dealership. West: To the west of the subject property is a large parcel of undeveloped land which has been acquired by the City of Federal Way for a park. According to the City of Federal Way Zoning Department, the subject property is zoned as commercial (CC). GEOLOGIC SETTING Physiographically, the site is situated on a gently rolling el a ated drift glaciation. plain Published approximately 13,500 years ago during the last period of con geologic maps for the site vicinity (Luzier, 1959) suggest that much of the material underlying the subject site is glacial till, a dense heterogenous mixture of silt, sand, and gravel. Typically, the till exhibits relatively low vertical hydraulic conductivity which frequently results in formation of a perched water table along its upper contact. The perched water table (if present) is frequently seasonal and derives recharge primarily from infiltration of precipitation through more permeable overlying soils. Topographically, the site is situated on an east -facing slope, approximately 420 feet above sea level (see Topographic Map, Plate 4). Based upon inference from topography and local drainage patterns, it appears that shallow seated groundwater (if present) in the vicinity of subject property may flow east, then toward the south. With respect to surface water resources, the site is located in the Hylebos Creek drainage area of the Puget Sound Drainages, approximately two and one quarter miles northwest of Hylebos Creek. Hylebos Creek flows south, then west, eventually discharging into Puget Sound at Commencement Bay. Steel Lake lies approximately one mile northeast of the subject property while North Lake lies approximately one mile to the southeast. DEVELOPMENT HISTORY AND LAND USE Sources reviewed for information regarding site and area development and land use included aerial photographs of the subject property and surrounding area, the King County branch of the Washington State Archives, and city directories. I ENVIRONMENTAL ASSOCIATES, INC. Century Square Storage Associates JN 6380 October 3, 1996 Page - 8 Aerial photographs of the area were reviewed for the years 1936, 1960, 1969, 1974, 1980, 1985, 1990, and 1995. The time interval between the various historical aerial photographs selected for this particular project is, in our opinion, entirely adequate for the intended purpose, which was to permit a general assessment of overall development and land use in the vicinity of the subject property. The following paragraphs provide an interpretative summary of our observations in each photograph. 1936 In this photograph, the subject property is undeveloped and covered by low vegetation, as is the surrounding land. Highway 99 is visible to the east and South 320th Street, which extends west only to Highway 99, can be seen to the northeast. Other than a commercial building at the intersection of Highway 99 and south 320th Street, there is very little development in the area. 1960 No apparent change to the subject property from the 1946 photograph. A power line right of way has been cleared immediately to the north of the subject property, and farther north land has been cleared for development. A shopping plaza can be seen one half mile to the north. Residential development in the area is now visible. 1969 The subject property remains undeveloped as it did in earlier photographs. Power lines and transmission towers are visible along the right-of-way to the north. To the north, large areas have been cleared along South 320th Street. Residential and commercial development in the area continues to increase. 1974 No apparent change to the subject property from the 1969 photograph. A strip mall building has been constructed to the east and an automobile dealership is visible to the south of the subject property. 1980 The central portion of the subject property has been excavated for a storm water detention pond. A large shopping plaza has been constructed to the north, across South 324th Street. SeaTac Mall is now visible to the east, across Highway 99. Commercial and residential development in the area continues to increase. 1985 Standing water is visible on the subject property (March photograph). Development in the area continues to increase. 1990 The subject property appears dry. A mini -storage facility has been constructed to the northwest, across South 324th Street. 1995 No apparent change to the subject property from the 1990 photograph. The area is nearly fully developed with commercial development, with the exception of a large undeveloped area to the west of the subject property. I ENVIRONMENTAL ASSOCIATES, INC. JN 6380 Century Square Storage Associates Page - 9 October 3, 1996 City directories (R. L. Polk and Co.) did not list the subject property. Sanborn Fire Insurance maps available at the King County Library system did not cover the area of the subject property. In summary for this section, based upon our research, it would appear that the site does noot have � a history of industry, chemical/petroleum distillation, manufacturing, disposal, other use which might otherwise have exposed the property to toxic, hazardous, or dangerous substances. PROPERTY CONVEYANCE/OWNERSHIP DATA From the resources of the King County Assessor's Office and Washington State Archives, the following limited history of ownership spanning a period of at least 64 years has been established - OWNER DATE OF PURCHASE INSTRUMENT S. Michael &Maria 12 02-88 warranty deed Rogers, Alan & Betty Deutsch, and Christopher & Penelope Leady 11-30-78 quit claim deed Sutter Hill Ltd. 07-28-78 quit claim deed Hanover Enterprises 1 not listed not listed Hanover Management, Inc. 02-23-51 not listed Evergreen Air Park Co. 12-30-41 not listed J. M. Jensen 01-03-24 not listed Pearl E. Jensen SITE RECONNAISSANCE An environmental engineer/EPA-certified AHERA Asbestos Building Inspector from Environmental Associates, Inc., visited the property on September 27, 1996 to review on -site conditions and land use practices in the surrounding area. As described previously, the subject property consists of a 1.23-acre parcel of undeveloped land. The property is surrounded by a chain -link fence and has been graded for use as a storm water detention pond. At the time o our site visit, it was vegetated with small trees, brush, aounbof beverage contd other ainers ive vegetation. and other There was no standing water on the property. M litter were scattered across the property. Two piles of soil were mounded on the northeast corner of the property and along the eastern border. One empty 55-gallon lacquer thinner drum was noted ad�,.acent to the southern border of the subject property, on the automobile dealership. ENVIRONMENTAL ASSOCIATES, INC. Century Square Storage Associates October 3, 1996 JN 6380 Page - 10 A BPA transmission line right-of-way extends south approximately 100 feet over the subject property. A 500 kV transmission line runs east-west -spp roxi approximately subjt 0 pet north of the property, while a 230 kV transmission line No hazardous waste appeared to be generated on the storage tanks the course vent lines, business. caps evidence to suggest the presence of underground etc.) was noted on the property. Similarly, no water wells or groundwater monitoring wells were noted on the property. No evidence of casual mentioned, unauthorized observed. dumping ed. At the time of the vista v than the litter and soil mounds previously men stains, odors, or unusual vegetation conditionsmightproperty. indicate the potential presence of hazardous materials were observed on thesubject CHECK FOR PCB -CONTAINING MATERIALS Prior to 1979, polychlorinated biphenyls (PCBs) were widely used in electrical equipment such as fluorescent light ballasts, transformers, capacitors, switches, and voltage regulators owing to their excellent heat transfer properties and thermal iSubstances Control Act (TSCA}stability. In 1976, the EPA �These tiated regulation of PCBs through issues pursuant to the regulations generally control the use, manufacturing, storage, documentation, and disposal of PCBs. EPA eventually banned PCB use in 1978, and adoption of amendments to TSCA under Public Law 94-469 in 1979 prohibited any further manufacturing of PCBs in the United States. Main Service No pad -mounted, vault -mounted, or pole -mounted electrical transformers Electrical were noted on the site. Transformers RADON EVALUATION Occurrence Radon is a naturally occurring, highly mobile, and chemically inert radioactive gas created through radioactive decay of uranium and thorium. The potential for occurrence of radon varies widely and is dependent upon (1) the concentration of radioactive materials in the underlying bedrock; (2) the relative permeability of soils with respect to gases; and (3) the amount of fracturing or faulting in surficial materials (EPA, 1987). Health Risks The concern regarding radon and its potential effects upon humans arlses from the results of studies (EPA 1987) which suggest that approximately fifteen percent of all lung cancer mortalities in the United States may be attributable to exposure to radon. ENVIRONMENTAL ASSOCIATES, INC. JN 6380 Century Square Storage Associates Page - 11 October 3, 1996 The EPA has established a concentration of radon of four (4) picocuries per liter (pCill) as a maximum permissible concentration "action level". Concentrations above this value would signal a potential health threat. According to some studies, an average concentration in homes across the United States is on the order of 1.4 pCi/l. Risk of The Bonneville Power Administration (BPA) recently published the results Potential of measurements for radon made in residences throughout the region they Exposure in 5erve, which includes Washington, Oregon and Idaho. For the area in the Federal Way immediate vicinity of the subject property (Township 21 North, Range 4 Area East), 62 tests were performed. The average radon level measured was 0.89 pCi/l, with the highest level 11.80 pCi/l. Only one of the sites tested had a radon level above 4.0 pCi/l. Based on the findings presenote na the occ rringAi.adoneyn levelswe nclude that exceeding the potential for exposure EPA's threshold of concern is very low. WATER SUPPLY, WASTE WATER AND SOLID WASTE MANAGEMENT Information supplied by the Public Works Department of the City of Federal Way revealed that they provide both water and sewer service in the vicinity of the subject property. No solid waste containers were observed on the subject property. ELECTROMAGNETIC FIELDS As mentioned earlier, a BPA right-of-way with 230 kV and 500 kV transmission lines extends over a portion of the subject property, with the 230 kV line running directly over the subject property. Passible biological effects of electromagnetic fields (EMF) produced by power lines, electric appliances, and other electrical devices have been the abject of scientific research for several decades. In .Tune of 1989, BPA published a comprehensive discussion and analysis of power transmission lines and their effects on biological organisms (Bonneville Power Administration, 1989, revised 1993), and in it summarizeder te f he existing and Washington has notosed guidelines yet developed formulated by six states and by BPA itself. The guidelines addressing these issues. Standards for electric fields on the right-of-way range from 2.5 kilovolts per meter {kVlm} to 11.8 kVlm, While those forthe field dge of sitrengthsoof lay kVlgm from I kV/m to 5 kV/m. BPA's measurements show typical g at the edge and 2.0 kV/m at the center for 230 kV line and 3.0 kVlm at the edge and 7.0 kV/m at the center for 500 kV lines. Thus far, only Florida and New York have set standards for magnetic fields, and they range from 100 milligauss (mG) to 250 mG measured at the edge of ENVIRONMENTAL ASSOCIATES, INC. Century Square Storage Associates October 3, 1996 JN 6380 Page -12 eld strengths the right-of-way. BPA.'s measurements at over t Ianeras averageand118 mG peak ical 3for 1 0 kV Iiines at the center of the rights -of -way range from 58 g BPA's measurements straw to 87 mG average and 183 mG peak for 500 kV lines. In summary, electric and magnetic field strengths to be below the most conservative guidelines at nearly all locations. In summary for this section, based upon BPA's reported measurements, it would appear that electromagnetic fields from the transmission lines do not pose a significant environmentai risk at the subject property. REVIEW OF WASHINGTON DOE LISTING OF UNDERGROUND STORAGE TANKS Review of the current Washington Department of Ecology within a undoneerlf mile ground storageradius t the (USTs) suggests that several registered USTs are located subject property. Information regarding these USTs and their status is provided below: COMPANY & AGE GAL.x 1,000 STATUS HYDRO. P05.` CONTENTS ADDRESS Leaded ARCO #5243 09 09 10-20 10-20 IU IU X Unleaded 31855 Pac. Hwy. So. 09 09 10-20 IU Unleaded Belmore Mobile Home Park NL < 1 1 RM X Leaded 2101 S. 324th St. X Used oil Cal Worthington Ford NL < 1.1 RM 33207 Pac. Hwy. So, NL Ernie's Fuel Stops NL NL NL RM lU X NL 33101 Pac. Hwy. So. 03 NL RM Leaded NL NL RM Unleaded NL NL RM Unleaded NL NL RM Unleaded NL NL IU Leaded 03 NL CL Htg. oil NL IU Unleaded 03 NL Unleaded 03 10-20 IU Federal Stores (Bon Marche) 20 < 1.1 IU X NL SeaTac Mall NL Federal Way SD #210 NL NL NL RM RM X Leaded 1066 S. 320th St. NL NL <1.1 RM Used oil 23 10-20 lU NL NL 23 10-20 IU Unleaded 23 10-20 IU ENVIRONMENTAL ASSOCIATES, INC. JN 6380 Century Square Storage Associates Page - 13 October 3, 1996 COMPANY & AGE (years) GAL.x 1,000 STATUS HYDRO. POS." . CONTENTS ADDRESS Firestone #3192 21 <1.1 IU X Used oil 32529 Pac. Hwy. So. K-Mart #3374 19 <1.1 RM X Used oil 1207 S. 320th St. Minit-tube #1512 09 05-10 IU X NL NL 32836 Pac. Hwy. So. 09 02-05 IU lU - Used oil 09 <1.1 Sear Roebuck & Co. NL <1.1 RM X Used oil 1101 S. 320th St. SeaTac Tire Co. NL <1.1 UK X Used oil Used oil 31629 Pac. Hwy. So. 21 <1.1 IU Texaco #63-232-0501 03 10-20 IU X NL Leaded 31660 Pac. Hwy. So. 28 NL RM RM Unleaded 28 26 NL 05-10 RM Unleaded 03 <1.1 IU Leaded 03 05-10 IU Unleaded 03 10-20 IU Unleaded 03 10-20 IU Used oil NL RM Used oil U.S. Postal Service NL :t4 RM X Unleaded 32829 Pac. Hwy. So. UNOCAL #4830 NL 10 CP X Leaded Unleaded 31832 Pac. Hwy. So. NL 10-20 CID CID Unleaded NL 10-20 Status Code: EX Exempt IU In Use RM TO Removed Temporarily Out UK Unknown CL Closure NL- Information regarding age of tanks, status, capacities, and/or content was not included for these sites in the WDOE UST list. Note: "Hydro. Pos." (hydrologic position) in the table refers to the position of the LISTS in direction of groundwater flow. Cross (X), relation to the subject property and the probable direction. In general, concern arises when USTs Down (D), and Up (U) indicate gradient are located up -gradient from the subject property. According t0 the most recent listing of leaking underground storage tanks from the WDOE, six tank facilities located within approximately a one-half mile radius of the subject property have reported accidental releases or leakage to the WDOE in the past. • ARCO Station #5243, 31855 Pacific Highway South, is awaiting cleanup for contaminated soil and groundwater. This site is cross -gradient, approximately mile of the subject property. ENVIRONMENTAL ASSOCIATES, INC. Century Square Storage Associates JN 6380 October 3, 1996 Page - 14 • Belmore Mobile Home Park, 2101 South 324th Street, completed a cleanup for contaminated soil. This site is cross -gradient, approximately mile of the subject property. • Ernie's Truck Stop, 33101 Pacific Highway South, completed a cleanup for contaminated soil. This site is cross- to down -gradient, approximately one half mile south of the subject property. • Federal Way Schools maintenance facility, 1066 South 320th Street, completed a cleanup for contaminated soil. This site is cross -gradient, approximately one quarter mile north- northwest of the subject property. ■ Sears, Roebuck store # 1099, 1701 South 320th Street, completed a cleanup for contaminated soil. This site is cross -gradient, approximately one quarter mile east of the subject property. ■ Shell Station (also listed as Texaco), 31660 Pacific Highway South, has a cleanup in progress for contaminated soil and groundwater. This site is cross -gradient, approximately one half mile north of the subject property. Considering the substantial separation distances and cross- to down -gradient hydrologic positions of the above -listed tank sites in relation to the subject property as positive risk -mitigating factors, it is our opinion that the potential for environmental impairment of the subject property from these sources is very low. The approximate locations of the WDOE-documented underground storage tanks within a one-half mile radius of the subject property are indicated on the Vicinity Map attached to this report as Plate 1. EPA &STATE RECORDS OF POTENTIALLY HAZARDOUS SITES Superfund Review of the current EPA Comprehensive Environmental Response, and NPL Compensation, and Liability Information System (CERCLIS) and National Priority List (NFL} listings revealed no CERCLIS and no NFL sites within an approximate one mile radius of the subject property that have been designated as potentially hazardous or eligible for participation in the Superfund cleanup program. MTCA The Washington Department of Ecology hazardous waste cleanup and investigation program was launched in 1989 as a part of the Model Toxics Control Act (MTCA), Chapter 173-340 WAC, in order to evaluate potential and actual hazards at sites within the state. Of the more than 630 sites currently on the program list, one is located within a one mile radius of the subject property: I ENVIRONMENTAL ASSOCIATES, INC. IJ Century Square Storage Associates October 3, 1996 JN 6380 Page - IS ■ Midway Seatac Auto Wrecking, 1403 South 320th Street, is listed as having contaminated soil and potentially contaminated groundwater, sediment, and surface water. Suspected and confirmed contaminants include halogenated organic compounds, metals, petroleum products, and corrosive wastes. This site is cross -gradient, approximately one half mile south of the subject property. Acknowledging the substantial separation distance and cross -gradient hydrologic position of the listed MTCA site in relation to the subject property as positive risk -mitigating factors, it is our opinion that the potential for environmental impairment of the subject property from this source is very low. RCRA/FINDS Review of the EPA's Facility Index System (FINDS) listing, revealed several sites within a one-half mile radius of the subject property which are regularly monitored by EPA/DOE for the use or generation of small amounts of hazardous substances as a normal part of their business activities. These include: REGULATORY GENERATOR COMPANY AGENCY CODE & ADDRESS ARCO Products Co. #5243 RCRIS 2 3855 Pac. Hwy. S. Bob Bjorneby's FW Collision RCRIS 3 1750 S. 327th Bon Marche RCRIS 2 1901 SeaTac Mall Car Tec Federal Way RCRIS 2 32610 Pac. Hwy. S. Crystal Cleaners RCRIS 3 1320 S. 324th Al Federal Way Schools Maint. NCDB,RCRIS 2 1066 S. 320th St. Federal Way Cleaners RCRIS 3 31601 Pac. Hwy. S. Good Times Kawasaki RCRIS 2 33003 Pac. Hwy. S. Happy Maid Cleaners RCRIS N 31607 Pac. Hwy. S. Jiffy Engines RCRIS N 32610 Pac. Hwy. S. 1 ENVIRONMENTAL ASSOCIATES, INC. JN 6380 Century Square Storage Associates Page - 16 October 3, 1996 REGULATORY. GENERATOR COMPANY: AGENCY. CODE ADDRESS K-Mart #3374 RCRIS 2 1207 S. 320th St. RCRIS 1 Kits Cameras 1823 SeaTac Mall Maaco Auto Painting RCRIS 2 32828 Pac. Hwy. S. Midway Seatac Auto Wrecking RCRIS 2 1403 S. 330th St. 1 Penske Auto Center RCRIS 3 1207 S. 320th St. Premium Transmission RCRIS 2 i 32610 Pac. Hwy. S. j Puget Sound Nat'l Bank Trust RCRIS N 1809 S. 330th SeaTac Tire Co. RCRIS 2 31629 Pac. Hwy. S. Sears Roebuck Co. RCRIS N 1701 SeaTac Mall SeaTac Pontiac GMC RCRIS 2 32427 Pac. Hwy. S. RCRIS 3 Sun Cleaner 1400 S. 312th St. RCRIS N Texaco USA 31660 Pac. Hwy. S. WDOE NRO 32657 9th PI. RCRIS N 32657 9th PI. S. ENVIRONMENTAL ASSOCIATES, INC. 11 Century Square Storage Associates JN 6380Page - 17 October 3, 1996 REGULATORY GENERATOR COMPANY AGENCY CODE & ADDRESS Worthington Suzuki RCRIS N 32747 Pac. Hwy. S. Regulatory Agency: NCDB National Compliance Data System RCRIS RCRA Listing Generator Code: 1 Large Quantity Generator, more than 1,000 kilograms per month of hazardous materials. 2 Small Quantity Generator, between 100 and 1,000 kilograms per month of hazardous materials. 3 Very Small Quantity Generator, less than 100 kilograms per month of hazardous waste. N - Business is a registered waste oil generator or has a registered spill plan. Businesses named in the FINDS listing are users or generators of potentially hazardous or toxic materials as a normal aspect of their business practices. Listed businesses are required to closely monitor and report their use or generation of such materials to the EPA. There were no registered treatment, storage, and disposal (TSD) facilities located within a one mile radius of the subject property. Based upon this information, upon the monitoring and reporting requirements unposed by the EPA, and upon the presumption that the above -mentioned user/generators exercise prudence in management of these materials to minimize liability and EPA penalties, it is our opinion that the potential for environmental impairment of the subject property from these sources is very low. ERNS Review of the EPA's Emergency Response Notification Systems (ERNS) list for the State of Washington revealed that the subject site has not reported a spill. This list has been compiled, with periodic updates, since October 1987. LANDFILLS nt of Public A review of documents from the WDOE revealed that there are o documeg County nted ted landfills Health regarding current and abandoned landfills located within a one mile radius of the subject property. ENVIRONMENTAL ASSOCIATES, INC. Century Square Storage Associates October 3, 1996 CONCLUSIONS JN 6380 Page - 18 Relying solely upon the information reviewed or otherwise developed in the course of our study, it appears that the subject property is free from contamination by potentially dangerous, hazardous, or toxic substances, and that such substances as defined under the Resource Conservation and Recovery Act (RCRA-42 USC-6901, et seq.), the Federal Water Pollution Control Act (33 USC 1257, et seq.), the Clean Air Compensation and Liability Act (42 USC 2001, et seq.), the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA: 42 USC 9601, et seq.), and the Dangerous Waste Regulations of the State of Washington, Chapter 173-303 WAC, have not been generated, stored, or disposed of on the property. LIMITATIONS This report has been prepared for the exclusive use of Century Square Storage Associates and their several representatives for specific application to this site. Our work for this project was conducted in a manner consistent with that level of care and skill normally exercised by members of the environmental science profession currently practicing under similar conditions in the area, and in accordance with the terms and conditions set forth in our proposal dated September 11, 1996. No other warranty, expressed or implied, is made. If new information is developed in future site work which may include excavations, borings, studies, etc., Environmental Associates, Inc., must be retained to reevaluate the conclusions of this report and Ito provide amendments as required. I I 4 In ENVIRONMENTAL ASSOCIATES, INC. Century Square Storage Associates JN 6380 October 3, 1996 Page - 19 REFERENCES GENERAL Bishop, Greg, Turnberg, Wayne L., and VanDusen, Karen. April 1985, Abandoned Landfill Study 'in King County. Seattle -King County Department of Public Health. Seattle, Washington. Bonneville Power Administration. 1993. Radon Monitoring Results from BPA's Residential Conservation Programs Report Number 15. Bonneville Power Administration. Portland, Oregon. Bonneville Power Administration. 1989, revised 1993. Electrical and Biological Effects of Transmission Lines - A Review. Bonneville Power Administration. Portland, Oregon. Environmental Protection Agency. September 1987. Radon Reference Manual EPA 520/1-87-20. U.S. Environmental Protection Agency, Office of Radiation Programs. Washington, D.C. Luzier, J. M. 1969. Water Supply Bulletin No. 28, Geology and Ground -Water Resources of ] Southwestern King County, Washington. Department of Water Resources. Olympia, 1 Washington. R. L. Polk and Co. Various years. Polk's South King County Directory. R. L. Polk and Co. Kansas City, Missouri. U.S. Geological Survey. 1951, photorevised 1981. Poverty Bay, Washington Quadrangle, 1,24,000. U.S. Geological Survey. Deriver, Colorado. ENVIRONMENTAL ASSOCIATES, INC. Century Square Storage Associates JN 6380 October 3, 1996 Page - 20 DATABASE The following table lists the various governmental databases reviewed for this project, the ASTM search radius, the search radius for this project, and the date that the agency produced the listing. I I ENVIRONMENTAL ASSOCIATES, INC- ■ Location of WDOE-Listed Underground Storage Tank N Location of WDOE-Listed Leaking Underground Storage Tank �— Probable Direction of Shallow -Seated Groundwater Flow (Source. 71#e somas Guide, 1995) 0 SO& ]mile L12 + ENVIRONMENTAL ASSOCIATES, INC. _ 2122 - 112th Avenue N.E., Stc. B-100 �Z Bellevue, Washington 98004 4- ~ VICINITY MAP Lot 14 of Century Plat South 324th Street Federal Way, Washington Job Numbe►: DWe. JN 6380 1 October 1996 11a1r 1 s _ �•w.is +� �17 7`1hr'•,�+iri• �f�, i • - ';: !. � mS�-:% � ' _ - - �:. ,.., '`kip .: s�',_ • _ -�. K':.�.�r' ,-: _ ��i Ki�y� ;�•,.:. fin" -".:} -.+_, ace;pew ov* .: � • "rr•,�`'' : r ;fix*i; mot..•• f:1• '_' ai � - r :i'-L� ENVIRONMENTAL SITE PHOTOGRAPHS EN Lot 14 of Century Plat ASSOCIATES, INC. South 324th Street 2122 _ 112th Avenue N.E., Ste. �-100 Federal Way, Washington Bellevue, Washington 98004 .�� Job Number. Date: P/ate- •. JN 6380 October 1996 Ross Plaza dance Dept. of insurance & studio Licensing financial services chiropractor F 500 kV transmission line South 324th Street I I Subject 1 city Property park offices bodyshop N Not to Scale bank 230 kV transmission 6ne ---------------- restaurant car stereo appliance store window coverings auto parts shop approximate direction ofgroundwaterJlow ENVIRONMENTAL. -Ar 1 ASSOCIATES, INC- -A— 2122 -112th Avenue N.E., Ste. B-100 Bellevue, Washington 98004 Seatac Pontiac GMC showroom SITE PLAN Lot 14 of Century Plat South 324th Street Federal Way, Washington Job Number. Date: Ptatet JN 6380 1 October 1996 1 1 3 r.l N Scale 0 L2 I mile Inferred direction ofgroundwater flow ENVIRONMENTAL 1, ASSOCIATES, INC. — — 2122 -112th Avenue N.E., Ste. B-100 t - Bellevue, Washington 98004 LUGS Tq-grirhic Map of Pol-V Bay, Washington Quadrmrgle TOPOGRAPHIC MAP Lot 14 of Century Plat South 324th Street Federal Way, Washington Job Number. Dote: JN 6380 October 1996 +l 4 GEOTECHNICAL ENGINEERING STUDY CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON G-0660 Prepared for Mr. Chris Leady Century Square Associates c/o Hal Hagenson, P.E. Bush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, Washington November 25, 1996 Geo Group Northwest, Inc. 13240 NE 20th Street, Suite 12 Bellevue, WA 98005 Phone: (206) 649-8757 DEC 3 19 G1 fy or FECi'sr�L WV,"Y EJ'! DWC �E? i NMIGroin Northwest, Inc Geotechnical Engineers, Geologists ► &Environmental Scientists �r r�r November 25, 1996 Mr. Chris Leady Century Square Associates c/o Hal Hagenson, P.E. Bush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, WA 98102 SUBJECT: GEOTECHNICAL ENGINEERING STUDY CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON Dear Mr. Leady: r 1••1 We are pleased to submit this report entitled "Geotechnical Engineering Study, Century Square, Tax Lot 14, South 324th Street, Federal Way, Washington." This report presents our subsurface exploration findings and geotechnical recommendations for foundation support, pavement subgrade, settlements, seismic hazards, slope stability and earthwork considerations. According to discussions with Mr. Hal Hagenson, we understand that Century Square Associates has plans to develop the subject property with one or two story commercial buildings. However, Geo Group Northwest, Inc. did not receive plans for the proposed development. The subject site was explored with eight test pits on October 29, 1996, in accordance with our proposal dated October 10, 1996. Due to the dense soils encountered, the test pits reached a maximum depth of 5 feet below the ground surface. The soils at the site consisted of loose to medium dense SILT and medium dense to dense silty SAND underlain by dense to very dense silt, sand and gravel. The depth to the dense to very dense soils varied between one (1) and three (3) feet below the ground surface. For a more detailed explanation of the soils, please refer to the report or the boring logs. Based on the results of our study, it is our opinion that the site is suitable for potential development. Structures may be supported on conventional footing foundations bearing 13240 NE 20th Street, Suite 12 ■ Bellevue, Washington 98005 Phone 206/649-8757 • FAX 206/649-8758 November 25, 1996 Century Square, Tax Lot 14 G-0660 Page ii on the dense to very dense soils (sand, silt and gravel one to three feet below the current ground surface) or structural fill bearing on the dense to very dense soils. Our recommendations, along with other geotechnically related aspects of the project, are discussed in more detail in the text of the attached report. We appreciate this opportunity to have been of service to you on this project. Should you have any questions regarding this report or need additional consultation, please feel free to call us. Sincerely, GEO GROUP NORTHWEST, INC. �)Azo'� � William Chang, PE. Principal Geo Group Northwest, Inc. TABLE OF CONTENTS JOB NO. G-0660 Page 1.0 INTRODUCTION 1.1 Project Description and Understandings ........................ 1 1.2 Scope of Services ......................................... 1 2.0 SITE CONDITIONS 2.1 Surface Conditions ........................................ 3 2.2 Subsurface Conditions ..................................... 3 2.3 Groundwater Conditions ................................... 4 3.0 DISCUSSION AND RECOMMENDATIONS 3.1 General ..................................... .......... 5 3.2 Seismic Design Considerations ............................... 5 3.3 Site Preparation and General Earthwork ....................... 6 3.4 Structural Fill ........................................... 6 3.5 Foundations ............................................ 7 3.6 Slab -on -Grade Floor ...................................... 9 3.7 Site Drainage .......................................... 10 3.8 Slope Stability and Excavations ............................. 10 3.9 Pavement Areas ........................................ 11 4.0 LIMITATIONS .............................................. 11 5.0 ADDITIONAL SERVICES ..................................... 12 ILLUSTRATIONS Plate 1 - Plate 2 - Plate 3 - Plate 4 through 11 - Plate 12 - Vicinity Map Site Plan Legend Test Pit Logs Typical Footing Subdrain Geo Group Northwest, Inc. GEOTECHNICAL ENGINEERING STUDY CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON G-0660 1.0 INTRODUCTION 1.1 Project Description and Understandings The subject property is located on the south side of South 324th Street, near the intersection between South 324th Street and Pacific Highway South, as shown in Plate 1 - Vicinity Map. The subject site is currently vacant and was used as a retention pond for the nearby shopping center development. According to our discussions with Mr. Hal Hagenson, we understand Mr. Chris Leady of Century Square Associates has plans to develop the subject property. The survey and site maps supplied by Bush, Roed & Hitchings, Inc., indicate the subject property as Tax Lot 14. No plans specifying the proposed development were supplied to Geo Group Northwest, Inc., however we assume that proposed development will be similar to neighboring properties. Geo Group Northwest, Inc. should be retained to review the final plans for the project to confirm the validity of the recommendations contained in this report. 1.2 Scope of Services The scope of the work performed for this study was generally consistent with that outlined in our proposal dated October 10, 1996. The completed scope of work included the following: Perform subsurface exploration at the site using a backhoe to excavate 8 test pits at the site. Geo Group Northwest, Inc. November 25, 1996 Century Square, Tax Lot 14 G-0660 Page 2 = An engineering geologist or geotechnical engineer to monitor excavating, collect representative soil samples for laboratory analysis, log the test pits and visually classify the soils encountered. = In our laboratory, selected soil samples will be examined to verify field classification. Tests for moisture content will be performed on each sample and grain size distribution may be performed. Perform engineering analysis for foundation support, pavement subgrade, settlements, subgrade stabilization, seismic hazards, slope stability, groundwater and earthwork considerations. = Prepare a geotechnical report including the results of our analysis and recommendations for the development of the site. This report has been prepared for the specific application to this site for the exclusive use of Mr. Chris Leady, Century Square Associates and their representatives. We recommend that this report in its entirety be included in the project contract documents for the information of the contractor. Geo Group Northwest, Inc. November 25, 1996 G-0660 Century Square, Tax Lot 14 Page 3 2.0 SITE CONDITIONS 2.1 Surface Conditions The subject property is located on the south side of South 324th Street, near the intersection between South 324th Street and Pacific Highway South, as shown in Plate 1 - Vicinity Map. The subject site is currently vacant and was used as a retention pond for the nearby shopping center development. The subject property is rectangular shaped, approximately 53,685 square feet or 1.23 acres in size. The subject site is bordered to the north by South 324th Street, the east by a one story strip mall building, the south by a car dealership and a two story wood frame building and to the west by undeveloped property for City Center Park. • The subject property is secured with a chain link fence and access is provided by a gate at the northeast corner at South 324th Street. The sides of the subject site slope towards the center of the property and vary in elevation from 422 to 405 feet. The center of the subject property is relatively level, varying in elevation between 404 and 405 feet. At the time of our study, the site was covered by grass, brush and small alders. The small alder trees were concentrated at the southern portion of the site. Areas of standing water (maximum of 2 inches deep), were observed near the northwest and southeast corners of the level portion of the site. Occasional litter was scattered around the subject site, usually near the chain link fence. Power lines were observed running east to west over the subject site at a height of approximately 25 to 30 feet above the elevation of South 324th Street. 2.2 Subsurface Conditions According to the map Geology of the Poverty Bay Quadrangle, Washington, by Waldron and published in 1961 by the USGS, the site is located in an area designated as Ground Moraine Deposits (Qgt). Ground Moraine Deposits (Qgt) typically consist of a very dense mixture of sand, silt and gravel. Geo Group Northwest, Inc. November 25, 1996 G-0660 Century Square, Tax Lot 14 Page 4 The subject site was explored with eight (8) test pits on October 29, 1996, in accordance with our proposal dated October 10, 1996. The test pits reached a maximum depth of 5 feet below the ground surface. The approximate locations of the test pits are shown on Plate 2 - Site Plan. Representative soil samples were obtained from the test pits for later examination and laboratory testing. The soils at the site consisted of loose to medium dense SILT and medium dense to dense silty SAND underlain by dense to very dense silt, sand and gravel. The depth to the dense to very dense soils varied between one (1) and three (3) feet below the ground surface. It appears that the surficial deposits consist of weathered native material (sand and silty sand) or sediment from operation of the retention pond (silty sand and silt). above the dense to very dense soils (silt, sand and gravel). For a more detailed explanation of the encountered soils, please refer to the boring logs. 2.3 Groundwater Conditions Groundwater seepage was encountered in 3 test pits, TP-2, TP-3 and TP-6, at depths of 0 to 3 feet below the ground surface (bgs). Slight seepage was encountered in TP-2 at 3 feet bgs and TP-3 at 0.5 and 1.5 feet bgs. The surface at TP-6 was covered with standing water and slight to moderate seepage was encountered at 0 to 2.0 feet bgs. No groundwater seepage was observed in the other test pits. It is our opinion that the groundwater encountered does not represent a true groundwater table, but due to the configuration of the site as a pond, the water is perched or ponded at the site. It is important to note that water levels can fluctuate seasonally, depending on rainfall, surface runoff and other factors. Geo Group Northwest, Inc. November 25, 1996 G-0660 Century Square, Tax Lot 14 Page 5 3.0 DISCUSSION AND RECOMMENDATIONS 3.1 General Based on the results of our study, it is our opinion that the site is suitable for potential development. Proposed structures may be supported on conventional footing foundations bearing on the dense to very dense soils (sand, silt and gravel one to three feet below the current ground surface) or structural fill bearing on the dense to very dense soils. Specific recommendations regarding the site development are presented in the following sections. 3.2 Seismic Design Considerations The greater Puget Sound area has experienced a number of small to moderate earthquakes and occasionally strong shocks during the brief 155-year historical record in the Pacific Northwest. The major earthquakes in the region are believed to be associated with deep-seated plate tectonic activity. Major faults within the region have not been active in the Holocene Age (geologic period dating since the last glacial retreat 14,000 years ago), consequently, none are known to be associated with historical seismicity. Historical records for the region indicate that the Olympia earthquake of April 13, 1949, with a Richter magnitude of 7.1, produced ground -shaking of intensity VIII near its epicenter; and the Seattle -Tacoma earthquake of April 29, 1965, with a Richter magnitude of 6.5, produced a ground -shaking of intensity IV to VIII on the Modified Mercalli Scale near its epicenter. This level of ground -shaking is estimated to be the maximum that has occurred in the region during the 155 years of historic record. Based on the Uniform Building Code (UBC), 1994, the Puget Sound region is classified as Seismic Zone 3 (Figure 16-2, UBC), and the structure is assigned a zone factor, Z, peak ground acceleration of 0.30 (Table 164, UBC). The encountered soil conditions best correspond to the description of the S2 profile with a Site Coefficient Factor of 1.2 (Table 16-J, UBC). The dense to very dense silts, sands and gravels encountered in the test pit exploration are not susceptible to liquefaction for the design earthquake. Geo Group Northwest, Inc. November 25, 1996 G-0660 Century Square, Tax Lot 14 Page 6 3.3 Site Preparation and General Earthwork We anticipate that the site will be regraded as part of the proposed development, however, at the time of this report we did not have specific information regarding any cuts or fills proposed for the site, therefore, the recommendations contained herein are for grading operations in general, applicable for the existing site. The areas of proposed development should be stripped and cleared of surface vegetation. Disturbance to the site should be kept to a minimum to prevent unnecessary erosion. Silt fences should be installed below areas disturbed by construction activity to prevent sediment -laden surface runoff from being discharged off -site. We recommend that the dense to very dense soils (sand, silt and gravel one to three feet below the current ground surface) be compacted to structural fill requirements as described in Section 3.4 - Structural Fill. To verify proper compaction, we recommend the proposed development areas be proof -rolled, such as with a fully loaded dump truck, under the supervision of the geotechnical engineer. Any soft spots or disturbed areas thus detected should be recompacted or excavated and replaced with compacted structural fill. To protect utilities from settlement, we recommend that the bottom of utility trenches be compacted using a backhoe mounted "hoe -pack". 3.4 Structural Fill All structural fill material used to achieve design site elevations should meet the requirements for structural fill. During wet weather, the material to be used as structural fill should have the following specifications: 1. Be free draining granular material, which contains no more than five (5) percent fines (silt and clay -size particles passing the No. 200 mesh sieve); 2. Be free of organic and other deleterious substances; 3. Have a maximum size of three (3) inches. Geo Group Northwest, Inc. November 25, 1996 G-0660 Century Square, Tax Lot 14 Page 7 All fill material should be placed at or near the optimum moisture content. The optimum moisture content is the water content in soil that enables the soil to be compacted to the highest dry density for a given compaction effort. The silty sand and silt encountered at the site are considered to be moisture sensitive and should not be used as structural fill material during wet weather conditions. During dry weather, any compactable non -organic soil meeting the above minimum size criteria may be used as structural fill, provided the material is near the optimum moisture content for compaction purposes. Structural fill should be placed in thin horizontal lifts not exceeding ten inches in loose thickness. Structural fill in building areas, including foundation and slab areas, should be compacted to at least 95 percent of maximum density, as determined by ASTM Test Designation D-1557-91 (Modified Proctor). Structural fill under pavement areas should be compacted to at least 90 percent of maximum dry density with the exception of the top 12 inches. The top 12 inches should be compacted to at least 95 percent of the maximum dry density, as determined by ASTM Test Designation D-1557-91. We recommend that Geo Group Northwest, Inc. be retained to evaluate the suitability of structural fill material and to monitor the compaction requirement during construction for quality assurance of the earthwork. 3.5 Foundations Based on the encountered site conditions, it is our opinion potential structures may be supported on conventional footing foundations bearing on the dense to very dense soils (sand, silt and gravel one to three feet below the current ground surface) or structural fill bearing on the dense to very dense soils. The subgrade of the foundation area should be compacted to structural fill requirements (95 percent of maximum dry density according to ASTM D-1557-91, Modified Proctor). If structural fill is required under footings, the fill should extend out beyond the edges of the footings a distance at least equal to the fill depth. For example, if one foot of structural fill was Geo Group Northwest, Inc. November 25, 1996 Century Square, Tax Lot 14 G-0660 Page 8 placed below the a 16 inch wide continuous footing, the total minimum width of the structural fill (and the footing over -excavation) would be 40 inches. Individual spread footings may be used for supporting columns and strip footings for bearing walls. Our recommended design criteria for foundations are as follows: Allowable bearing pressure = 3,000 psf for dense to very dense native soils (sand, silt and gravel); 2,000 psf for structural fill underlain by dense to very dense native soils; • Minimum depth to bottom of perimeter footing below adjacent final exterior grade = 18 inches; • Minimum depth to bottom of interior footings below top of floor slab = 12 inches; Minimum width of wall footings = 16 inches; • Minimum lateral dimension of column footings = 24 inches; Estimated post -construction settlement = 1/2 inch or less; s Estimated post -construction differential settlement; across building width =1/2 inch or less. A one-third increase in the above allowable bearing pressures can be used when considering short-term transitory wind or seismic loads. Lateral loads can also be resisted by friction between the foundation and the supporting compacted fill subgrade or by passive earth pressure acting on the buried portions of the foundations. For the latter, the foundations must be poured "neat" against the existing undisturbed soil or backfilled with a compacted fill meeting the requirements of structural fill. Structural fill requirements can be found in Section 3.4 - Structural Fill, of this report. Our recommended parameters are as follows: Geo Group Northwest, Inc. November 25, 1996 Century Square, Tax Lot 14 G-0660 Page 9 Passive Pressure (Lateral Resistance) = 350 pcf equivalent fluid weight for dense to very dense native soils and structural fill; • Coefficient of Friction (Friction Factor) = 0.35 for dense to very dense native soils and structural fill. We recommend that footing drains be placed around all perimeter footings. More specific details of perimeter foundation drains are provided in Section 3.7 - Site Drainage of this report. 3.6 Slab -on -Grade Floor Based on the encountered site conditions, it is our opinion that a slab -on -grade floor may bear on the compacted existing soils or on compacted engineered structural fill. Compaction of the existing soils and placement and compaction of structural fill should be as specified in Section 3.4 - Structural Fill of this report. In preparing the subgrade, native soils disturbed by construction activity should be either recompacted, or excavated and replaced with compacted, well -draining, structural fill or crushed rock. Prior to placing the capillary break, we recommend the subgrade be proof - rolled. Any soft spots or disturbed areas thus detected should be recompacted or excavated, replaced and compacted. To avoid moisture build-up on the subgrade, slab -on -grade floors should be placed on a capillary break, which is in turn placed on the prepared subgrade. The capillary break should consist of a minimum of six (6) inch thick free -draining layer of 1.5 inch minus gravel or 2 inch size crushed rock containing no more than five (5) percent finer than No. 4 sieve. A vapor barrier, such as a 6-mil plastic membrane, can be placed over the capillary break beneath the slab to reduce water vapor transmission through the slab. Two (2) to four (4) inches of sand may be placed over the barrier membrane for protection during construction. Geo Group Northwest, Inc. November 25, 1996 G-0660 Century Square, Tax Lot 14 Page 10 3.7 Site Drainage The surface of the site should be graded such that surface water is directed off the site and away from the proposed structures. Water should not be allowed to stand in any area where footings, slabs or pavements are to be constructed. During construction, loose surfaces should be sealed at night by compacting the surface to reduce the potential for moisture infiltration into the soils. Final site grades should allow drainage away from buildings. We suggest that the ground be sloped at a gradient of three (3) percent for a distance of at least 10 feet away from buildings except in areas that are to be paved. We recommend that footing drains be installed around the perimeter foundations. The drains should consist of a four (4) inch minimum diameter, perforated or, slotted, rigid drain pipe laid at or just below the invert of the footing with a gradient sufficient to generate flow. The drain line should be bedded on, surrounded by, and covered with a free -draining rock, pea gravel, or other free -draining granular material that is separated by geotextile filter fabric, as shown on Plate 12 - Typical Footing Subdrain. Under no circumstances should roof downspout drain lines be connected to the footing drainage system. All roof downspouts must be separately tightlined to discharge into the storm water collection system. We recommend that sufficient cleanouts be installed at strategic locations to allow for periodic maintenance of the footing drains and downspout tightline systems. 3.8 Slope Stability and Excavations Under no circumstances should temporary excavation slopes be greater than the limits specified in local, state and national government safety regulations. Temporary cuts, such as trenching, greater than four feet in height should be sloped at an inclination no steeper than 1H:1V (Horizontal:Vertical). Permanent slopes should be at an inclination no steeper than 2H:1V and preferably at 3H:1V for slopes with maintained lawns. Should groundwater seepage be encountered during construction, excavation of cut slopes should be halted and the cut slopes reevaluated by Geo Group Northwest, Inc. Geo Group Northwest, Inc. November 25, 1996 G-0660 Century Square, Tax Lot 14 Page 11 3.9 Pavement Areas The adequacy of site pavements is strictly related to the condition of the underlying subgrade. If this is inadequate, no matter what pavement section is constructed, settlement or movement of the subgrade will be reflected up through the paving. In order to avoid this situation, we recommend the subgrade be treated and prepared as described in Section 3.2 - Site Preparation and General Earthwork This means at least the top twelve (12) inches of the subgrade should be compacted to 95 percent of the maximum dry density (per ASTM D-1557-91). It is possible that some localized areas of soft, wet or unstable subgrade may still exist after this process. If so, they may require overexcavation of the unsuitable materials and their replacement with a compacted structural fill or crushed rock. A typical pavement section for the proposed development consists of three (3.0) inches of asphalt concrete over six inches of crushed rock. Asphalt concrete should be placed in horizontal lifts no greater than one and half (1.5) inches. 4_0 LIMITATIONS Our findings and recommendations stated herein are based on the field observations, our experience and judgement. The recommendations are our professional opinion derived in a manner consistent with the level of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area and within the budget constraint. No warranty is expressed or implied. In the event the soil conditions vary from those described herein, during site excavation or construction, Geo Group Northwest, Inc. should be notified and the above recommendations should be re-evaluated. Geo Group Northwest, Inc. November 25, 1996 Century Square, Tax Lot 14 5.0 ADDITIONAL SERVICES G-0660 Page 12 We anticipate that the site will be regraded as part of the proposed development, we recommend that Geo Group Northwest Inc. be retained to perform a general review of the final design and specifications of the proposed development to verify that the earthwork and foundation recommendations have been properly interpreted and implemented in the design and in the construction documents. We also recommend that Geo Group Northwest Inc. be retained to provide monitoring and testing services for geotechnically-related work during construction. This is to observe compliance with the design concepts, specifications or recommendations and to allow design changes in the event substance conditions differ from those anticipated prior to the start of construction. Should you have any questions regarding this report or need additional consultation, please feel free to call us. Respectfully Submitted, GEO GROUP NORTHWEST, INC. Troy arke Geotechnical Engineer William Chang, PE. Principal I EXPIRES 2119/178 1 Geo Group Northwest, Inc. ILLUSTRATIONS G-0660 Geo Group Northwest, Inc. 0 : PL oL x: MM N7 VICINITY MAP Group Northwest, Inc. CENTURY SQUARE, TAX LOT 14 Geotechnical Engineers, Geologists, & SOUTH 324TH STREET r Environmental Scientists FEDERAL WAY, WASHINGTON SCALE: 1 " = 2400' DATE: 1 1 /12/96 1 MADE: TP CHKD: WC JOB NO: G-0660 PLATE: 1 LOT 8 SOUTH 324TH , STREET SSM" TOP.423.26r%.NUWENT i MV.::M48 NV..40e.66 HE 91V..409.30 C _ 4C (Woo CD•OIDON) 4VV-.400.66 E � c0 •' TOP SU rr ISQSITE NOTES) Faun TACZa / OOIIeIE IIILOr LANE STRPE / / w S=1 TOP.413.29 4 S INV..419]7 N �~ ETdWATION.421.71 AT PROPER r ` INV..4" 9EY..40.T.49 C CH Nrv..41l.72 E I f A 1: - Soo' TOP.412.31 e1V..40e.76 Sr 91K.40166 S NV..403.66 NE ♦, (S rauW REOAR 'n Ou h !cam ARIIEp SAA) i i (3£L six NOTES) AT RTT WRMM { N [LEVA1R7t.41O,6f SEi If i 4M LEAD V EAST 7.5' Cr P _ ,;, - 4e r X' a' is S,r +v .y+, . r 4• ' r�' r' 7.S' cTr .•itiR,t iPo� �A' cD �' 1 a'i .+`r 'a .�' F .Af • A`6.: NR71 CL FtIRI. � �i' a,a - - ^ - w _ {, s: . . Y r :�•'� a f j-&U7H LOW OF NE,J!•Nf ��/.SEL 17 s • -- • 0.0 {r - 4,6 J .3; 246.58•pp� - (P� Y--�n1,..4a.,3 ismo �.►,� 0.10 (P&M) NOTE: j .ti SLK TRASH RACK AT CULVERT JP c -p END a DISLODGED AND THE N aLTI l _+( o oPPE SED 1/4t FILL / T7 •' C - I Tp_8 ,.i r TP 3 L A� I ) l l I I I � I ""-------J----------------- SOUTH LRE OF WA EASEUENI I I n -- - -- - - - - - - - - - - - - - - - - - - - - -- i- - -- 1----------- I I I �'• �j z LOT 14 _ o Tp- O z+ Tp.2 I �I I NOTE: SITE a coVVED WITH BRUSH 0 511ALL ALDERS I � I � l k e- ` 7 P a fro - / DUMPSTER LOCATION \ /� A' (CI LOT ,S ) FOUND REHAR ! CA `c+*T?-S'(MARKED SM) O4 6' HIHIGHCL FENCE r,'r -- ao6• E ! a24 s OF PROPERTY IOiPLR _ r N 420 � 6' t!P/ CL iT7MCi � � •� AC EXM1M 2 STCPf WOOD FRAMED NURJWM FLOOR . 42&M --- � ioP'oF filet i � af., it§W9 422 'r j p+� h i f� 420 AC I -AIM. LOT LEGEND ' TEST PIT NUMBER AND ' TP_1 APPROXIMATE LOCATION SITE PLAN ADAPTED FROM SURVEY BY BUSH, ROED & HITCHINGS, INC. AND DATED OCTOBER,1996 0 20 40 80 SCALE: I inch = 40 feet LEGEND OF SOIL CLASSIFICATION AND PENETRATION TEST UNIFIED SOIL CLASSIFICATION SYSTEM (USCS) FSY=MBO LABORATORY MAJOR DIVISION TYPICAL DESCRIPTION CLASSIFICATION CRITERIA GRAVELS CLEAN GRAVELS OJRLEOR Nlo lMas Than Het FTNw COARSE Carve Grains Larger GRAINED Than No. 4 SIM) DIRTY SOILS GRAVELS Mum soME GIN GRADED GRAVELS, GRAVESi1PDMIXTURE. LITTLE OR NORNES LITTLE DET�INE PEFICENTAGES OF GRAVEL AND SAND FROM GP POORLY GRADED GRAVELS .AND GRAVEL -SAND MDC URESUTREORNORNES GRAIN SIZE DISTRIBUTION GM SILTY GRAVELS, GRAVELZA DSILT MIXTURES CURVE GC More Than Hal byweight CLEAN SW Larger Than No. SANDS SANDS 200 Sine Orr FOR NO (Mors Than Hag FH2% Sp Coarse Grains Smeller T Then No. 4 Sieve) I SM DIRTY SANDS MITH SOME FDOR SC Liquid Limit ML SILTS FINE- (Below A4ineon GRAINEDr Plasticity Chart L�� a MH SOILS Negligible Organic) Liquid Land CL CLAYS < 30% More Than HdF (Above A -Line on Liquid Limit by Weight Plecticity Chart, > 50% CH Smaller Than Negligible Organic) No. 2DO Sieve ORGANIC Liquid Lxnit OL SILTS & CLAYS < 50% PlacteilyChart) (Below A -Line on rLUquidLimR OH > 50% HIGHLY ORGANIC SOILS I Pt SOIL PARTICLE SIZE U.S. STANDARD SIEVE Passing Retained FRACTION ' Sieve S'¢e rem Sieve Sae rem SILT / CLAY #t200 0.075 SAND FINE #40 0.425 #r200 0.075 MEDIUM #E10 0 *40 0.425 COURSE #r4 4.75 #10 2 GRAVEL FINE 19 #r4 4.75 COURSE 78 1 19 COBBLES 76 mm to 203 mm BOULDERS > 203 mm ROCK > 76 mm -RAGMENTS ROCK 1 >0.76 cubic meter in volume CLAYEY GRAVELS, GRAVELSArDCLAYMXrURFS COARSEGRWNED SOILS ARE FI®AS WELLCLASGRADED SANDS, GRAVELLY SANDS, UITL E OR FOLLOWINGS: FOLL NO FINES POORLY GRADED SANDS, GRAVELLY SANDS, LITTLE < 5% Fine Graded: OR NO FINES GW. GP, SW, SP; SILTY SAND& SAND -SILT MIXTURES CLAYEY SANDS, SANIMAY MXTURES INORGANIC SILTS AND VERY FINE SANDS, ROCK FLOUR, SILTY SANDS OF SUCfIT PLASTICITY > 12% Fine Grained: GM, GC. SM. SC; 5 b 12% Fine Greiner use dud symbols INORGANIC SILTS, MICACEOUS OR ' DIATOMACEOUS, FINE SANDY OR SILTY SOIL K 40 . INORGANIC CLAYS OF LOW PLASTICITY. GRAVELLY, SANDY, OR SILTY CLAYS, CLEAN CLAYS 0 30 INORGANIC CLAYS OF HIGH PLASTICITY, FAT CLAYS 0 5 20 � ORGANIC SILTS AND ORGANIC SILTY CLAYS OF LOW PLAsncrTY 10 7 4 ORGANIC CLAYS OF HIGH PLASTICITY p Cu - (De0 / D10) greeter Cron 4 Cc - (D30 • D30 / Di 0 / De0) baiween 1 and 3 NOT MEL nNG ABOVE REQUIREMENTS ATTERSEAG UMITS BEAM W UNE CONTENT or P.I. LESS THAN 4 OF FINES ATTERBERGUMRSABOVE '/1 LINE. EXCEEDS 12% or P.I. MORE THAN 7 Cu = (D60 / DI 0) greater than 6 Cc = P30 • D30 / DI / 1360) bebmen 1 and 3 NOT MEB nNG ABOVE REQUIREMENTS ATTERBERG LIMITS BELOW W LINE CONrB� with P.I. LESS THAN 4 OF FINES ATTERBEnGUMITSABOVEWLINE DCC®S 12% wilh P.I MORETHAN 7 Bonn son 0 RON 0 10 20 30 40 50 60 70 Bo 90 100 PEAT AND OTHER H IC+ILY ORGANIC SOILS LIQUID LIMIT (%) GENERAL GUIDANCE OF SOIL ENGINEERING PROPERTIES FROM STANDARD PENETRATION TEST (SPT) SANDY SOILS SILTY & CLAYEY SOILS Blow Relative Friction Blow Unconfined Counts Density Angle Description Counts StrerKjth pesn�lption N % O, degree N Su, tsf 0 - 4 0 -15 Very tense < 2 < 0.25 Very soft 4-10 15 - 35 26 - 30 Loose 2-4 0.25 - 0.50 Soft 10-30 1 35 - 65 28 - 35 Medium Dense 4-8 0.50 - 1.00 Medium Stiff 30-50 65 - 85 35 - 42 Derlse 8 - 15 1.00 - 2.00 Stiff i > 50 85 - 100 38 - 46 Very Dense 15 - 30 2.00 - 4.00 Very Stilt > 30 > 4.00 ! Hard 7 Group Northwes Inc. G.otechnlcal Engineers, Geologists, a Environmental Scientists 3 13240 NE 20th Street. Suite 12 Bellevue, WA 98005 PLATE Phone (208) 64"757 Fax (206) 649-8758 TEST PIT NO. TP- 1 LOGGED BY: TP TEST PIT DATE: 10/29/96 GROUND ELEV: 405 feet +/- DEPTH ft. USCS SOIL DESCRIPTION SAMPLE No. Water % OTHER TESTS/ COMMENTS SM Brown silty SAND, fine with occ. gravel, dense, moist. 11 S1 11.1 SP Gray SAND, fine to medium, dense to very dense, moist. 9 S2 7.3 SP/ Brown SAND, fine with gravel to GRAVEL, fine to coarse GP with sand, dense to very dense, moist. Occasional weak cemented deposits on gravels. 0 33 8.4 Bottom of test pit @ 4.0 feet 5 Ground surface covered with leaves and alder saplings. No seepage observed in test pit. 10 15 20 Group Northwest, Inc. Geotechnical Engineers, Geologists, & r~ Environmental Scientists TEST PIT LOG CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON JOB NO: G-0660 I DATE: 11/6/96 1 PLATE 4 TEST PIT NO. TP- 2 LOGGED BY: TP TEST PIT DATE: 10/29/96 GROUND ELEV: 412 feet +/- DEPTH ft. USCS SOIL DESCRIPTION SAMPLE No. Water % OTHER TESTS/ COMMENTS SM Brown silty SAND, fine with occ. gravel, trace organics, medium --- dense, moist. -----------------•--------••--------------- S 1 12.4 ML/ Gray sandy SILT with gravel to silty SAND with gravel, occ. SM orange staining, dense to very dense, moist. S2 10.7 5 Bottom of test pit @ 4.0 feet Ground surface covered with brush and grasses. Slight seepage observed @ 3.0 feet in test pit. 10 15 20 Group Northwest, Inc. Geotechnical Engineers, Geologists, & !� Environmental Scientists TEST PIT LOG CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON TEST PIT NO. TP- 3 LOGGED BY: TP TEST PIT DATE: 10/29/96 GROUND ELEV: 405 feet +/- DEPTH ft. USCS SOIL DESCRIPTION SAMPLE No. Water % OTHER TESTS/ COMMENTS SM Brown silty SAND, fine with occ. gravel, medium dense, wet. a S1 12.2 -... ML .-----••-•------•-------•---••------------- Brown to gray SILT, laminated, loose to medium dense, moist. 0 S2 18.6 Gray silty SAND, fine to medium with gravel, dense to very SM dense, moist. S3 8.4 Bottom of test pit @ 3.0 feet Ground surface covered with grasses and thin, dark organics. 5 Slight seepage observed @ 0.5 and 1.5 feet in test pit. 10 15 20 Group Northwest, Inca Geotechnical Engineers, Geologists, & Environmental Scientists TEST PIT LOG CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON TEST PIT NO. TP- 4 LOGGED BY: TP TEST PIT DATE: 10/29/96 GROUND ELEV: 411 feet +/- DEPTH n. USCS SOIL DESCRIPTION SAMPLE No. Water % OTHER TESTS/ COMMENTS Brown silty SAND, fine with occ. gravel, trace organics, medium SM S1 10.6 dense, moist. S2 13.8 MU Gray sandy SILT with gravel to silty SAND with gravel, dense to SM very dense, moist. 5 Bottom of test pit @ 4.0 feet Ground surface covered with brush and grasses. No seepage observed in test pit. 10 15 20 ME r Group Northwest, Inc. Geotechnical Engineers, Geologists, & Environmental Scientists TEST PIT LOG CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON JOB NO: G-0660 I DATE: 11/6/96 1 PLATE TEST PIT NO. TP- 5 LOGGED BY: TP TEST PIT DATE: 10/29/96 GROUND ELEV: 410 feet +/- DEPTH ft. USCS SOIL DESCRIPTION SAMPLE No. Water % OTHER TESTS/ COMMENTS Brown silty SAND, fine, with occ. gravel, medium dense to SM dense, moist. ------••---•-------------------- S1 14.5 Gray SAND, fine to coarse, with gravel and orange staining, SP dense to very dense, moist. S2 5.0 5 Bottom of test pit @ 4.0 feet Ground surface covered with brush and trees. No seepage observed in test pit. 10 I 15 20 Group Northwest, Inc. Geotechnical Engineers, Geologists, & Environmental Scientists TEST PIT LOG CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON JOB NO: G-0660 I DATE: 11/6/96 1 PLATE 8 -- TEST PIT NO. TP- 6 LOGGED BY: TP TEST PIT DATE: 10/29/96 GROUND ELEV: 404 feet +/- DEPTH R USCS SOIL DESCRIPTION SAMPLE No. Water % OTHER TESTS/ COMMENTS SP- Brown SAND, fine, with silt, occ. gravel and orange staining, SM medium dense, wet. SI 21.8 Gray SAND, fine to coarse, with gravel and occ. orange staining, w S2 17.9 SP dense to very dense, moist to wet. 5 Bottom of test pit @ 5.0 feet Ground surface covered with thin organics and standing water. Slight to moderate seepage observed @ 0 to 2.0 feet in test pit. 10 15 20 r Group Northwest, Inc. r Geotechnical Engineers, Geologists, & Environmental Scientists TEST PIT LOG CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON TEST PIT NO. TP- 7 LOGGED BY: TP TEST PIT DATE: 10/29/96 GROUND ELEV: 409 feet +/- DEPTH ft. USCS SOIL DESCRIPTION SAMPLE No. Water % OTHER TESTS/ COMMENTS SM Brown to gray silty SAND, fine, trace to occ. gravel, medium _ dense to dense, moist. S1 10.3 Gray silty SAND, fine, trace to occ. gravel, dense to very dense, 0 32 10.8 SM moist. 5 Bottom of test pit @ 5.0 feet Ground surface covered with brush and grasses. No seepage observed in test pit. 10 15 20 Group Northwest, Geotechnical Engineers, Geologists, & r Environmental Scientists Inc. TEST PIT LOG CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON JOB NO: G-0660 I DATE: 11/6/96 1 PLATE 10 TEST PIT NO. TP- 8 LOGGED BY: TP TEST PIT DATE: 10/29/96 GROUND ELEV: 405 feet +/- DEPTH ft. USCS SOIL DESCRIPTION SAMPLE No. Water % OTHER TESTS/ COMMENTS Gray silty SAND, fine with occ. gravel and occ. orange staining, S1 17.3 SM medium dense to dense, moist. SP Black SAND, with charcoal debris, medium_ dense, m_o_ist._ _ _ _ _ . - - - ML --- Orange sandy SILT, medium dense, moist. ................................. ....... --- S2 28.0 SM Gray sandy SILT, with gravel, dense to very dense, moist. S3 22.9 Bottom of test pit @ 4.0 feet 5 Ground surface covered with thin organics and bark. No seepage observed in test pit. 10 15 20 Group Northwest, Inc. Geotechnical Engineers, Geologists, & Environmental Scientists TEST PIT LOG CENTURY SQUARE, TAX LOT 14 SOUTH 324TH STREET FEDERAL WAY, WASHINGTON JOB NO: G-0660 I DATE: 11/6/96 1 PLATE 11 ` T Il�l�i 6 " to 12" SLAB BACKFILL WITH COMPACTED NATIVE, RELATIVE IMPERMEABLE SOIL CAPILLARY BREAK GEOTEXTILE FILTER FABRIC, MIRAFI 140 NSL, 140NS, OR EQUAL FREE DRAINING BACKFILL CONSISTING OF WASHED GRAVEL, PEA GRAVEL, ETC. MINIMUM 4 INCH DIAMETER PERFORATED PVC PIPE WITH POSITIVE GRADIENT TO DISCHARGE NOT TO SCALE NOTES: 1. Do not replace rigid PVC pipe with flexible corrugated plastic pipe. 2. Perforated or slotted PVC pipe should be tight jointed and laid with perforations or slots down, with positive gradient to discharge. 3. Do not connect roof downspout drains into the footing drain lines. TYPICAL FOOTING SUBDRAIN Group Northwest, Inc. CENTURY SQUARE, TAX LOT 14 Geotechnical Engineers, Geologists, & SOUTH 324TH STREET �r Environmental scientists FEDERAL WAY, WASHINGTON SCALE: NONE DATE: 11/13/96 MADE: TP I CHKD: WC I JOB NO: G-0660 PLATE: 12 P11: r-- BRH December 10, 1996 BUSH, ROED & HITCHINGS, INC. Civil Engineers and Land Surveyors Greg Moore City of Federal Way - Community Development 33530 - lst Way South Federal Way, WA 98003-6210 Re: PRE 96-0039 Lot 14, Plat of Century - Storm Facility Revision Proposal Dear Mr. Moore: CEO Robert M. Roed, P.LS., P.E. President Ronald G. Goldy, P.E. Senior Vice President Steven A. Hitchings, P.LS. Vice President Hugh R. Johnston, P.LS. Project Managers John E. Anderson, P.E. Brent D. Cummings, P.E. Harold E. Hagernson, P.E. James V. Harrison Jeffrey J. McManus, P.LS. Darrell C. Nance, P.LS. John J. Weed, P.E. We are preparing submittals for a Land Use Modification Permit on the subject property. The site is currently occupied by an interim detention pond. This pond was intended to mitigate the impacts generated by the Century Square development on the Highway 99 drainage system, until such time as the Highway 99 system could be adequately improved. The system was improved in the 1970's, but restriction plates were installed until a downstream detention facility could be built to buffer the impact of the increased flows on properties lying even farther downstream. The South 336th Street regional detention facility will accomplish this task. When construction is completed on the South 336th Street detention facility, the restriction plates will be removed and the "interim" detention facility will no longer be necessary. Public works staff has indicated that the project should be completed by the end of this year. A temporary easement was recited on the face of the Plat of Century to enable this interim detention function. We have included a copy of a current plat certificate (reference page 3, item 3). In her September 18, 1996 letter to me, Deb Barker required that "the applicant shall submit a letter to Greg Moore,....requesting the easement be eliminated." We respectfully request that the easement be eliminated and we ask that you process this in the, appropriate manner. Please feel free to call should you require additional information from our office.' Thank you for your time and consideration. Sincerely, BUSH, ROED & HITCHINGS, INC. Hal Hagenson, P.E. Project Manager HEH/t1s cc: Chris Leady Century Square Associates 2009 Minor Avenue East, Seattle, Washington 98102-3513 - Phone 206/323-4144; Fax 206/323-7135 1-800/935-0508 Internet: brhinc.com 12709/'aildAar �jq& COMPANY ]F WASHINGTON, INC. 1201 Third Avenue, Suite 3800 Seattle, Washington 98101 Senior Title Officer, Julie Goodman Title Officer, Tara M. Doherty Unit No. 8 FAX Number 206-343-8403 Telephone Number 206-343-1328 Bush, Roed and Hitchings, Inc. Order No. 305078 2009 Minor Avenue East Your Ref. 94188-OH Seattle, Washington 98102 CERTIFICATE FOR Attention: Steve Hitchings FILING PROPOSED PLAT PLAT CERTIFICATE SCHEDULE A GENTLEMEN: In the matter of the plat submitted for your approval, this Company has examined the records of the County Auditor and County Clerk of King County, Washington, and the records of the Clerk of the United States Courts holding terms in said County, and from such examination hereby certifies that according to said records the title to the following described land: Lot 14, Century, according to the plat thereof recorded in Volume 104 of Plats, pages 68 through 72, inclusive, in King County, Washington. IS VESTED IN: S. MICHAEL RODGERS and MARCIA RODGERS, husband and wife and ALLAN M. DEUTSCH-and BETTI'M. DEUTSCH, husband and wife; and CHRISTOPHER C. LEADY and PENELOPE LEADY, husband and wife as community property SUBJECT TO THE FOLLOWING EXCEPTIONS: As on Schedule B, attached hereto. CHARGE: $200.00 TAX: 16.40 TOTAL CHARGE: $216.40 RECORDS EXAMINED TO: December 4, 1996 at 8:00 a.m. STEWART TITLE COMPANY OF WASHINGTON, INC. Julie Goodman Senior Title Officer Unit No. 8 PAGE 01 125TE (11* 42-d GUARANTY COMPANY PAGE 02 PLAT CERTIFICATE Schedule B Order No. 305078 GENERAL EHCEPTIONS: 1. Rights of claims of parties in possession not shown by the public records. 2. Public or private easements, or claims of easements, not shown by the public record. 3. Encroachments, overlaps, boundary line disputes, or other matters which would be disclosed by an accurate survey or inspection of the premises. 4. Any lien, or right to a lien, for services, labor or material heretofore or hereafter furnished, imposed by law and not shown by the public records, or Liens under the Workmen's Compensation Act not shown by the public records. 5. Any title or rights asserted by anyone including but not limited to persons, corporations, governments or other entities, to tide lands,' or lands comprising the shores or bottoms of navigable rivers, lakes, bays, ocean or sound, or lands beyond the line of the harbor lines as established or changed by the United States Government. 6. (a) Unpatented mining claims; (b) reservations or exceptions in patents or in Acts authorizing the issuance thereof; (c) water rights, claims or title to water. 7_ Any service, installation, connection, maintenance, capacity, or construction charges for sewer, water, electricity or garbage removal. B. General taxes not now payable or matters relating to special assessments and special levies, if -any, preceding the same becoming a lien. 9. Indian tribal codes or regulations, Indian treaty or aboriginal rights, including, but not limited to, easements or equitable servitudes. B. SPECIAL EFICEPTIONS: As on Schedule B. attached. 12/09/96 11 :55AM Order No,--�05078 PAGE 03 PLAT CERTIFICATE SCHEDULE B Page 2 SPECIAL EXCEPTIONS: 1. EASEMENT AND THE TERMS AND CONDITIONS THEREOF, INCLUDING, BUT NOT LIMITED TO, THE FOLLOWING: 2 IN FAVOR OF: U.S.A. CONDEMNED IN CAUSE NUMBER: 269, 272, 535 and 685 UNITED STATES DISTRICT COURT HOLDING TERMS AT SEATTLE PURPOSE: Electric transmission lines AREA AFFECTED: Portion of said premises and other property Copies of the decrees entered in said cases were recorded under Recording Numbers 3128470; 3128474, 3253846 and 3308820, respectively. EASEMENT AND THE TERMS AND CONDITIONS REFERENCED THEREIN, INCLUDING, BUT NOT LIMITED TO, THE FOLLOWING: GRANTEE: City of Tacoma PURPOSE: To construct, reconstruct, install, operate, inspect and maintain a water transmission pipeline, or pipelines, and appurtenant equipment AREA AFFECTED: Portion of said premises and other property RECORDED: RECORDING NUMBER: February 27, 1974 7402270262 3. EASEMENT PROVISION CONTAINED IN SAID PLAT AS FOLLOWS: Lot 14 is subject to a temporary storm drainage easement, said easement to expire when an adequate drainage pipe system is constructed in Pacific Highway South eliminating the requirement for a retention basin upon this lot. (continued) 12/09/96 11:56AM Order No---305078 PLAT CERTIFICATE SCHEDULE B Page 3 4. NOTES FROM THE FACE OF THE PLAT: There shall be no direct vehicular access to and from South 320th Street to and from Lot 13, and Lot 4, except for common access with Lot 11. Lot 2 is restricted to one direct access point on South 320th Street. Lot 11 is restricted to the maximum of two direct vehicular access points on South 320th Street. (One in common with Lots 3 and 4). There shall be no direct vehicular access to and from Pacific Highway South to and from Lots 15 and 16. Direct vehicular access to and from Pacific Highway South to Lots 9, 10, 11 and 12 is restricted to the maximum of four access points. Two of these access points are reserved, one each for Lots 10 and 12. There shall be no direct vehicular access to and from South 320th Street, to and from Lot 1, except for the westerly 10.00 feet, provided that said access complies with King County standards: Prior to issuance of building permits on any of the lots shown on the subdivision, a site plan must be submitted and approved by the appropriate agency (currently King County Building and Land Development Division) and in accordance with Federal Way Community Plan Policy FWF1-9. Future installation of utilities to serve the subdivision shall be underground. 5. AGREEMENT AND THE TERMS AND CONDITIONS THEREOF: BY AND BETWEEN: Lakehauen Sewer District and Hanover Management, Inc. DATED: December 15, 1977 RECORDED: December 28, 1977 RECORDING NUMBER: 7712280844 REGARDING: Construction of sewage facilities and costs relating to same 6. Right of the public to make necessary slopes for cuts or fills upon said premises in the reasonable original grading of streets, avenues, alleys and roads, as dedicated in the plat. (continued) PAGE 04 12/ 09 // 9 6 11 : 5 7 A M Order N'—)305078 j PLAT CERTIFICATE SCHEDULE B Page 4 7. DELINQUENT SECOND HALF GENERAL AND SPECIAL TAXES AND CHARGES: YEAR: TAX ACCOUNT NUMBER: LEVY CODE: CURRENT ASSESSED VALUE: 1996 150050-0140-03 1205 Land: $53,600.00 Improvements: $ 0.00 DELINQUENT SECOND HALF GENERAL TAMES: AMOUNT BILLED: AMOUNT PAID: AMOUNT DUE: $823.49 $411.74 $411.75 PLUS INTEREST DELINQUENT SECOND HALF SPECIAL DISTRICT: AMOUNT BILLED: AMOUNT PAID: AMOUNT DUE: 8. ASSESSMENT: AMOUNT: INTEREST: FROM: ANNUAL INSTALLMENTS: INSTALLMENTS PAID: INSTALLMENTS DELINQUENT: NEXT INSTALLMENT DELINQUENT: LEVIED BY: FOR: DISTRICT NUMBER: ACCOUNT NUMBER: $1.25 $ .63 $ .62 PLUS INTEREST $23,628.81 10.695X March 23, 1983 20 11 0 March 23, 1997 Road Improvement District Road 74R 0265-150050-0140-03 END OF SCHEDULE B Title to this property was examined by: Anne Knight Any inquiries should be directed to one of the title officers set forth in Schedule A. AWK/tdt/9013K PAGE 05 r ®RH December 6, 1996 BUSH, ROED & HITCHINGS, INC. Civil Engineers and Land Surveyors Deb Barker City of Federal Way - Community Development 33530 - 1st Way South Federal Way, WA 98003-6210 Re: PRE 96-003 9 Lot 14, Plat of Century Storm Facility Revision Proposal Dear Ms. Barker: CEO Robert M. Roed, RLS., P.E. President Ronald G. Goldy, P.E. Senior Vice President Steven A. Hitching% P.LS. Vice President Hugh R. Johnston, RLS. Project Managers John E. Anderson, P.E. Brent D. Cummings, P.E. Harold E. Hagenson, P.E. James V. Harrison Jeffrey J. McManus, P.LS. Darrell C. Nance, P.L.S. John J. Weed, P.E. We would like to take this opportunity to respond to your letter of September 18, 1996, wherein you state " The city may approve the LSM if it complies with the criteria of FWCC section 22-1094(c) (below). The application should reflect how these criteria are met. 1) Except as allowed under this chapter, it will not alter or adversely affect streams, lakes, wetlands, or significant trees either on or off the subject property. 2) It will not violate any express policy of the city. 3) It meets at least one of the following criteria: a. It is necessary to correct an erosion of drainage problem on an undeveloped site. b. It is necessary to create new utility or access corridors. C. Other unusual circumstances exist which make it reasonable to permit land surface modification in advance of the issuance of a development permit, subdivision or short plat approval." Our responses are enumerated in kind. 1) The Land Surface Modification submittal includes a geotechnical engineering report, a phase one environmental audit, a stormwater technical information report (including a level one and level two downstream analysis) , a topographic survey and a SEPA checklist. These documents support the conclusion that the project will not alter or adversely affect streams, lakes or wetlands. The survey supports the conclusion that there are no significant trees on the subject property. 2) The proponent intends on complying with all applicable city codes and policies. It is our understanding that it is the intent of the land surface modification process to identify these codes and policies and to enforce compliance as a condition of the permit. Therefore, it would not violate any express policy of the city. 3) We assert that the proposed project meets both criteria a. and b. as follows: 2009 Minor Avenue East, Seattle, VAshington 98102-3513 - Phone 206/323-4144; Fax 206/323-7135 1-800/935-0508 Internet: brhinc.com BUSH, ROED & HITCHINGS, INC. CITY OF FEDERAL WAY Deb Barker December 6, 1996 Page 2 The site is currently occupied by an interim detention pond. This pond was intended to mitigate the impacts generated by the Century Square development on the Highway 99 drainage system, until such time as the Highway 99 system could be adequately improved. The system was improved in the 1970's, but restriction plates were installed until a downstream detention facility could be built to buffer the impact of the increased flows on properties lying even farther downstream. The South 336th Street detention facility will accomplish this task. When construction is completed on the South 336th street regional detention facility, the restriction plates will be removed and the "interim" detention facility will no longer be necessary. Public works staff has indicated that the project should be completed by the end of this year. Consequently, the function of the current interim detention pond is redundant to the function of the new South 336th regional detention facility. In effect, tax lot 14 is being needlessly flooded by these "unusual circumstances" and we regard this as a "drainage problem on an undeveloped site." Sincerely, Hal Hagenson, P . E. Project Manager cc: Chris Leady Century Square Associates. CITY OF G FM00'33530 1ST WAY SOUTH FEDERAL WAY, IIW gASHINGTON 98003 Grade and Fill Questio-nna-ke Please fill out the following questionnaire to determine if a grading permit is required. If you have any questions, contact the Building Division at 661-4000. LOT 14 - PLAT OF CENTURY Owner: CENTURY SQUARE A55bL. Project Name: STORM FAJUT4 REV15IDN Project Address: l 4DI S . - 3 Z 4 M'-' 5TREE T' - FEDERAL WADI . WA 1. Will the excavation be two (2) feet or more in depth at any point? Yes No _ 2. Will the excavation create a cut slope greater than 5 feet in height or steeper than 1-1 /2 horizontal feet to 1 vertical foot? Yes _ No 3. Will the fill exceed 50 cubic yards? Yes V/ No _ 4. Is the fill intended to support structures and is it 3 or more feet in depth? Yes v No _ 5. Will the fill be 1 foot or more in depth and placed on natural terrain with a slope of 5 horizontal feet to 1 vertical foot? Yes Z No _ 6. Will the excavation or fill change the points where the storm water or ground water enters or exits the subject property, or change the quality, quantity, or velocity of storm water or ground water? Yes � No 7. Will any trees be removed that are defined as significant trees under the Federal Way Zoning Code or any vegetation be removed that was required to be retained by or through any development permit? Yes _ No y 8. If the subject property is 2 acres or larger and has 20% or more of its area covered with native vegetation, will more than 20% of the native vegetation be removed? Yes _ No N b► 9. Using the midpoint of each property line, will the average elevation of the subject property be increased more than 2 feet or decreased more than 1 foot? Yes I No 10. Is the subject property vacant? (The subject property does not contain buildings nor is actively being used.) U5E 15 AS SToRK DC E."170u PDMD Yes f No Signature: Phone: For Staff Use. Only >'9rrnit Required: Yes No Staff f'arsan: Date eOF:N00or 33530 1 ST WAY SOUTH September 18, 1996 Mr. Hal Hagenson Bush Roed and Hitchings 2009 Minor Avenue East Seattle, WA 98102 RE: PRE 96-0039 rLE (206)661-4000 FEDERAL WAY, WA 98003-6210 Lot 14, PLAT OF CENTURY STORM FACILITY REVISION PROPOSAL 1401 South 324th Street, Federal Way Dear Mr. Hagenson: Thank you for meeting with the city's Community Development Review Committee (CDRC) regarding a preapplication meeting for the subject application. This committee includes representatives from the Lakehaven Utility District, King County Fire District, and staff from the city's planning, public works, and building departments. The following is a summary of zoning and land use comments from our meeting on September 5, 1996, where your request to abandon a temporary storm water detention pond, and fill and grade the lot for future development was discussed. Where appropriate, I have enclosed pertinent ordinance sections. Please note that the following comments and enclosures do not include all regulations applicable to the subject proposal. LAND USE REQUIREMENTS (Contact Deb Barker, 661-4103) 1. Easement Elimination — The storm drainage easement on lot 14, plat of Century, may be removed through an administrative process reviewed by the Department of Community Development Services. The applicant shall be responsible for submitting documentation that'the easement has expired on its own terms, including history of the easement, verification that an adequate drainage pipe system is constructed in Pacific Highway South, and that the system has the capacity to functionally handle the runoff from the storm drainage easement. To process the administrative review the applicant shall submit a letter to Greg Moore, Director of Community Development Services, requesting the easement be eliminated. IV Mr. Hal Hagenson September 18, 1996 Page 2 2. Land Surface Modification — The proposal to grade and fill the lot would be reviewed through Federal Way City Code (FWCC) Division 7, Land Modifications (LSM). A LSM that is not permitted outright may be approved through Process I pursuant to FWCC Section 22-1094, Discretionary approval. Process I is an administrative process which requires a public notification application. The city may approve the LSM if it complies with the criteria of FWCC section 22-1094(c) (below). The application should reflect how these criteria are met. 1) Except as allowed under this chapter, it will not alter or adversely affect streams, lakes, wetlands, or significant trees either on or off the subject property. 2) It will not violate any express policy of the city. 3) It meets at least one of the following criteria: a. It is necessary to correct an erosion or drainage problem on an undeveloped site. b. It is necessary to create new utility or access corridors. c. Other unusual circumstances exist which make it reasonable to permit land surface modification in advance of the issuance of a development permit, subdivision or short plat approval. Please refer to FWCC Section 22-1094(b) Required information, and the enclosed LSM handout for the information necessary to process the application. As discussed in the preapplication meeting, a recent survey of the area is required. An existing site survey with project specific notation could be submitted to meet this requirement. 3. SEPA — Projects involving grading or filling of more than 500 cubic years of soil are subject to State Environmental Policy Act (SEPA) review. An environmental checklist (enclosed) must be submitted and reviewed prior to the city issuing an environmental threshold determination. A public notice is also issued which includes a 15-day comment and 14-day appeal period. The determination notice is sent to all property owners and residents of properties within 300 feet of the subject property. SEPA review can run concurrently with LSM, but must be concluded before the LSM is approved. The SEPA checklist must contain a report on the nature, level and proposed remedy for potentially contaminated soils at the site. If the contaminants in the sediments are below the Dangerous Waste levels specified in the Dangerous Waste Regulations (Chapter 173- 303 WAC), the solids are considered "solid waste" and may be disposed of at an approved Mr. Hal Hagenson September 18, 1996 Page 3 solid waste facility. Vactor solids that contain contaminants below the levels listed in Table 2, Methods A Cleanup Levels, as identified in the Model Toxics Control Act (MTCA) Chapter 173-340 WAC, may not require a waste clearance authorization and can be disposed of as "clean" fill. In many situations it may be more conservative (safe) to cover MTCA level contaminated soils with hard surfaces on a site that will be developed for commercial/industrial purposes than it would be to remove those soils from the site for disposal. Removing the soils may create an exposure risk at another site, or in the removal process, that would not otherwise be present. It may be appropriate, in this instance, to prepare an environmental assessment for the site to determine the level of contamination and provide recommendations for cleanup or securing the site. 4. Processing Fees — As proposed, administrative review for easement elimination, land surface modification, and SEPA requires the following zoning code processes and fees (fees indicated in parentheses): Administrative review ($40.00 per hour); SEPA environmental determination ($472.00, includes fire review fee); and LSM ($1,190.00 plus $10.00 per acre). Additional fees are associated with other city and district regulations and permits. 5. Hearing Examiner's Report — A copy of the Hearing Examiner's report for the plat of Century must be provided for the administrative review. 6. Other — The subject site is within the City Center - Frame (CC-F) zoning district. Permitted uses for the zone are stated in FWCC section 22-803 through FWCC section 22-816 (enclosed). Development is subject to the standards of FWCC Article XIX - Design Guidelines (enclosed). R iBLIC WORKS (Contact Julie Pappa, 661-4132) A memorandum, which includes comments from the Surface Water Division, will be available at a later date. BumDING DEPARTMENT (Contact Ken Cornwall, 661-4123) Buildings will require compliance with Uniform Building Code (UBC) Appendix Chapter 33 for all grading activity associated with this project. Mr. Hal Hagenson September 18, 1996 Page 4 Please be advised that the preapplication review is preliminary only and does not take the place of the required technical review that will follow the submittal of a formal land use application. If I can be of assistance, please contact me at 661-4103. I look forward to working with you. Sincerely, Deb Barker Associate Planner enc: LSM Handout FWCC Division 7, LSM SEPA Checklist Procedures for Notification CC-F Zoning District Design Guidelines Comments from Building Department c: Ken Cornwall, Plans Examiner Julie Pappa, Engineering Plans Reviewer Fei Tang, Surface Water Engineer pmapp1A=ntury\3umm afy At r interoffice M E M O R A N D U M Public Works Development Services Division To: Deb Barker, Associate Planner From: Julie M. Pappa, Engineering Plans Reviewer II Subject: Plat of Century Storm Facility Revision Propos : PRE 96-0039 Lot 14, Plat of Century, 1401 South 324th Street Date: September 23, 1996 Public Works Development Services Division has reviewed the Subject application to abandon an existing storm water detention pond and associated facilities, then fill and grade the lot for future development. Public Works has received plans and related correspondence for review as follows: ► Interim Plan, Master Drainage Plan for Century prepared by Wilsey & Ham, Inc. ►Plan and Profile Drawing for 324th Street, dated December 21, 1976 prepared by Wilsey & Ham, (Sheets 5 and 8 of 14). ► Correspondence dated May 26, 1995 to Mr. Hal Hagenson of Bush, Roed & Hitchings, Inc. from the City. ► Correspondence dated November 29, 1994 to Mr. Hal Hagenson of Bush, Roed & Hitchings, Inc. from the City. ► Correspondence dated November 4, 1994 to Mr. Jerry Bibee of CH2M Hill from Mr. Hal Hagenson of Bush, Roed & Hitchings, Inc. As a result of the collective review of the plans and related correspondence, Public Works has the following pre -application comments: Storm Water The application proposes a Land Surface Modification (LSM) and Administrative approval for abandonment of a recorded easement on the Plat of Century. A Level 1 Off -site Analysis of each down stream system is required per the King County Surface Water Design Manual (KCSWDM), the City's amendments, and any conditions through the SEPA process. Surface water runoff control is required for this project, including collection and conveyance of stormwater runoff to an acceptable discharge location. Also required is a written narrative on the relevance of the 7 Core and 12 Special Requirements in the KCSWDM to this proposal. The applicant maintains that the storm water detention pond located at Lot 14 of the Century Plat "was intended to mitigate impacts on the Highway 99 storm pipe trunk and that the pond and non -essential appurtenances could be removed once the Highway 99 storm trunk was adequately improved." The attached correspondences between Wilsey and Ham, Inc., and King County, dated May 17, 1976 and June 29, 1976 concur with this contention. A Surface Water Management Model (SWMM) input file was prepared by CH2M HILL (excerpt attached), for both existing and future conditions. Model simulations from the SWMM input file did not include the Tax Lot 14 detention pond. This means improvement of the Highway 99 trunk system was designed to accommodate abandonment of the detention pond on Lot 14. As stated in the letter from Bush, Roed & Hitchings, Inc. (BRH) to the City of Federal Way dated February 10, 1995, in order for the pond to be abandoned and filled, the proposed Capital Improvement Program (CIP) project design and construction on Highway 99 must be completed and accepted by the City. The Kitts Corder and South 336th Street Regional Stormwater Detention and Wetlands/Stream Restoration Project is under construction and is scheduled for completion in the Fall of 1996. The detention facility cannot be abandoned until this project is complete and operational. The attached BRH letter to the City, dated February 10, 1995, also states that project proponents, Century Square Associates, must pay a pro rata share of the CIP project to mitigate detention facilities abandoned with development of Lot 14. It is necessary for the applicant to provide information to demonstrate that sufficient conveyance capacity exists from the project site to the Highway 99 trunk to convey the increase in runoff associated with abandonment of the pond. This information must include an analysis extending at least one block south of South 324th Street on Highway 99. Provisions must also be made for diversion of any pipes currently discharging into the existing detention facility. Water Quality Fill of the detention pond does not release the applicant from the obligation to comply with on - site water quality requirements. Erosion Control A Temporary Erosion and Sediment Control Plan must be prepared prior to the issuance of a permit for Land Surface Modification, (LSM). Frontage Improvements Proposed site improvements exceed 25 percent of the assessed or appraised value of the property. Per City Code Section 22-1473, full width street improvements must be installed along the entire frontages. The property frontages are currently improved; therefore, the proposed project is not subject to City Code Section 22 requirements. Any proposed improvements associated with this project that encroach upon the public right-of-way will require a Right -of -Way Permit before construction of improvements. Any damage to the public right-of-way because of construction shall be repaired by the applicant. Traffic A haul route plan for the proposed import of earth material shall be submitted to the Public Works Development Services Division for review and approval before issuance of a permit for Land Surface Modification. Title Report A preliminary title report for the property shall be prepared and submitted to the City Public Works Development Services Division. The title report should include any easements within or of benefit to the property. Soils Report Over 4,000 cubic yards of earthwork are proposed for the project. Pursuant to Section 22- 1286 of the City Code, a soils report must be prepared by a qualified professional engineer licensed in the State of Washington describing how the proposed development will impact each of the following on the subject property and nearby properties: P. Slope stability and land sloughing. No. Seismic hazards. P. Groundwater. ► Seeps, springs and other surface waters. For this project, the report should also address: ► Subsurface conditions. No. Material testing. IN. Site preparation. ► Import material recommendations. No. Structural fill placement. No. Compaction requirements. ► Potential for differential settlement. ► Construction methods. ► Slope stabilization. ► Construction monitoring and testing. ► Site drainage. No. Erosion control. Bonds IN. A performance bond in the amount of 120 percent of the engineer's estimate of cost of site work and, if applicable, street improvements to be performed is required prior to issuance of any building permits. Fees Public Works fees for this project will include the following: ► Commercial development construction plans $480.00 (Up to 12 hours of review time) Supplemental plan review $ 40.00/hour Construction inspection $ 35.00/hour c Stephen Clifton, Development Services Manager Jeff Pratt, Surface Water Manager Gary Barnett, Senior Development Engineer Fei Tang, SWM Engineer L:\PRMSYS\DOCUMENT\PRE96_00.39\PW091796.DOC 631 STRANDER BOULEVARD TUKWILA, WASHINGTON 98188 May 17, 1976 File No. 3-1885-0101-20 King County Division of Hydraulics Department of -Public Works 900 County Administration Building Seattle, Washington 98104 Attention: Mr. Larry Gibbons, P.E. Dear Larry: Earl P Wilsey (1892-1957) TeJeghang_(2 6) 0814 I r 7 r_.1 L, 1� L 7 ,L KING COUNTY RE: CENTURY CITY-- DRAINAGE Over the past few months we have met several times to discuss the procedures and development of drainage plans for the expansion of the Century project located on the west side of Pacific Highway (US 99) between South 320th Street and South 324th Street. Based on your informal approval of the approach taken to this problem, we have prepared the attached master.drainage concept plan with accompanying calculations for your. review and approval. The basic criteria for design as set forth. by you was as .follows: 1. The basic storm criteria will be a 1:25 year storm with a 24 hour storm placed in the third day of a 7 day storm cycle. 2. At the time, during this storm cycle, where the capacity of the existing drainage basin system is exceeded and flooding becomes imminent, the drainage outflow from the expansion area of Century must be -fully retained until the flooding has passed, at which time the outflow from Century may be resumed. 3. At such time as downstream drainage facilities are improved on Pacific Highway the requirement of full retention.will.be removed and the system may then operate on partial retention of the expansion area such that peak runoff rates will not be increased over those existing prior to development. In order to establish a reasonable pattern for the full 25 year, 7 day storm cycle and 24 hour storm, a synthetic curve of cumulative rainfall was developed using the accumulative precipitation data provided for the West Campus Development, in the same area of King County. This curve is shown on Sheets 1 and 2 of the attached calculations. Utilizing data from the Pacific Highway drainage basin study it was determined that 137.81 equivalent acres of 100% runoff were tributary to the 18 inch drainage engineering - planning - surveying - environmental analysis - riappinq - systems 41 Mr. Larry Gibbons, P.E. Page Two May 17, 1976 system restriction immediately south of the Century site as shown on Sheet 3 of the attached calculations. Sheet 4 of the calculations develops the cumulative runoff from the existing tributary basin for the 7 day cycle, and indicates average rates over this 7 day cycle. Also indicated is the runoff resulting from the 3rd day 24 hour storm with its associated average runoff rates over this period. This calculation is also shown for the tributary basin with the Century expansion area deleted. A check of the capacity of the 18 inch outfall line from this area determined that a reasonable capacity for this line without backup or flooding was approximately 10 c.f.s. Sheets 5, 5A & 5B of the calculations develop the areas to be fully retained and the required storage capacity for the interim and permanent storage basins. All of the preceding data was then plotted on the graph shown on Sheet 6. This plot indicates the total runoff from the tributary area as curve "A" the synthetic 7 day storm. During the 1st 2 days of this cycle the rate of runoff is within the capacity of the existing system therefore no backup occurs. Commencing with the third day, and the imposition of the 24 hour storm, runoff begins to exceed the 10 cfs outfall system capacity until at approximate elevation 404, flooding begins. At this point the outlet from the proposed. Century system must be shut off until flooding ceases and the existing system again becomes adequate. Following shutdown runoff is being taken from the area through -the existing system at the calculated rate of 10 c.f.s, curve "C". :-Y1hen_ the cumulative out- flow (curve "C") meets the cumulative runoff of the area tributary all backup has been removed from the area and the Century system,.which has been storing its total runoff, may then begin emptying its storage reservoir: This point is shown at day 4.3 on the graph. From this point the average outflow rate until day 7 (end of rainfall) for the total basin, including Century City is approximately 4.3 c.f.s., well within the capability of the outfall system. Page 7 compares the total storage requirement to contain the runoff from the beginning of day 3 until the system opens at day 4.3 with the available storage developed on Sheets 5, 5A & 5B. This calculation indicates a storage require- ment of 329,045 cubic feet for the full development of the expanded Century site. This indicates that in addition to the permanent retention basin for the site, a temporary basin of 288,439 cubic feet will be required until the downstream facilities on Pacific Highway are improved. The Vaster Drainage Plan established preliminary sizing and working elevations for these basins. It is proposed that when the hydraulic gradient on Pacific Highway at South 324th Street rises to elevation 404, the Century City system will close automatically and commence storage. When the gradient lowers to this point the system will open automatically and empty the storage reservoirs. It is proposed that an overflow device, bypassing the shutoff gate, be installed in the reservoir to guard against the occurrence of a higher intensity storm and prevent over -topping. Jrlr. Larry Gibbons, P.E. Page Three Flay 17, 1976 With regard to those westerly areas of the site, which are presently in another water- shed draining westerly from the site, it is proposed to maintain this drainage, with appropriate retention facilities to reduce the peaks after development to previously existing peaks. A copy of the drainage calculations for this area is also attached herewith for your review and approval. I believe the above system as proposed conforms with the criteria as set forth by you, however, if any questions should arise please call me as we are anxious to proceed with the final design as rapidly as possible. Very truly yours, WILSEY & HAM, C. 1 Dick Reeves, P.E. Project Engineer DR/kss King County State of Washington John D. Spellman, County Executive Department of Public Works Jean L. DeSpain, Director 900 King County Administration Building Seattle, Washington 98104 June 29, 1976 r- @ f JIJt� 's 75 1Ir. Dick Reeves, P.E. Project Engineer Wilsey and Ham, Inc. 631 Strander Boulevard Tukwila, Washington 98188 Dear Mr. Reeves:'...,,,= t f RE: Plat of Century WILS Y & HAM, ►��. Reference is made to your letter to us dated May 17, 197.6, and to your blaster Drainage Plans and Computations submitted to us on June 10, 1976. We have reviewed your Master Drainage Plan and Computations for the proposed plat of Century and found them satisfactory. However, detail drainage plans and computations will be required before we can recommend approval of th`e final plat. If you have any questions, please feel free to contact Larry Gibbons of my staff on 344-3874. Very truly yours, ' WILLIAM B_ GILLESPIE Division Engineer Division of Hydraulics S'- BG LRG; ', b I. IL //�v�x2s,Di�f ✓ * * STORAGE DATA * * WH11 SUBBASIN * * SeaTac Mall West Pond E1 199-18245' 405.0 9000.0 0 * Detetion pond west of SR-99 @ 324th Ave. E1 999-WPOND' 410.0 7500.0 0 * Artificial storage node to enhance run stability at weir/orfice junction E1 199-15250' 361.0 2000 0 * Storage behind KinderCare E1 199-15200' 350.0 4356 0 * * * * ORIFICE DATA * * WH11 SUBBASIN F1 199-1824S' 199-1824M' 1 3.14 0.62 0.0 * MODEL POND OUTLET WITH ENLARGED PIPE IN Cl CARDS *F1 199-WPOND' 199-1824M' 1 1.77 0.62 0.0 * MODEL ENTRANCE TO UPGRADED PIPE AS 3.0' ORIFICE F1 199-15200' 199-1520J' 1 7.07 0.50 0.0 * Hwy 99 system orifice control restrictions * ORIFICE MODELED AS EQUIVALENT PIPE *F1 199-15250' 199-1525J' 1 3.14 0.62 0.0 * * ORIFICES ON TRUNK SYSTEM REMOVED *F1 199-17260' 199-1726M' 1 3.14 0.62 0.0 *F1 199-1804o' 199-1804M' 1 3.14 0.62 0.0 �"1 Z S FX- FYT. iJA i * * raise i.e. to allow for positive drainage D1 18CB0241 400.0 274.05 0.0 0.0 D1 w 18CB0201 400.0 274.04 0.0 0.0 *D1 18CB0241 400.0 272.37 0.0 0.0 *D1 IBC80201 400.0 272.9 x 0.0 0.0 * East-West culvert in wetland D1 18T00501 400.0 274.03 0.0 0.0 D1 18T00401 400.00 273.95 0.0 0.0 * D1 18CB0161 400.0 271.0 0.0 0.0 D1 18CB0131 400.0 267.8 0.0 0.0 D1 x 18CB011, 400.0 266.0 0.0 0.0 * Pipe system through development D1 18T0035, 400.0 265.16 0.0 0.0 D1 18T00301 273.4 263.9 0.0 0.0 D1 18T00251 400.0 260.9 0.0 0.0 D1 x 18T0020, 400.0 254.61 0.0 0.0 D1 ISCA0161 400.0 242.5 0.0 0.0 D1 * 18CA014, 400.0 237.3 0.0 0.0 * Pipe system to outfaLL D1 18T17/15' 400.0 230.88 0.0 0.0 D1 18T07/051 400.0 227.55 0.0 0.0 D1 x 18D002' 400.0 227 0.0 0.0 * x END OF WH08 SYSTEM * **w*x*wxwxwwxxxxw****-k*w+v+wirwwwwxww*w*frx** e w*+tw*xwxdr**r �* wxx �r wwwww wx * x STORAGE DATA * * WH11 SUBBASIN * SeaTac Mall West Pond E1 199-1824S' 405.0 9000.0 0 * Detetion pond west of SR-99 a 324th Ave. E1 199-WPONDI 410.0 7500.0 0 * Artificial storage node to enhance run stability at weir/orfice junction E1 199-1525ol 361.0 2000 0 * Storage behind KinderCare E1 x 199-1520ol 350.0 4356 0 * x UPPER WH10 SUBBASIN * Storage nodes for stability EllOVDUMI 413.0 50.0 0 E1'11181 w 409.0 50.0 0 * Upper detention pond #1100 (data from "Regional Retention Facility" Dwgs.) E111100' 430.7 -1 3 * Lower invert of pond 0.6' to allow for orifice outlet *E2 0.293 0 0.691 10.2 0.854 13.9 E2 w 0.001 0 0.293 0.6 0.691 10.8 0.854 14.5 * Middle detention pond #1111 (data from "Evergreen Plaza Pond" Dwgs.) BRH BUSH, ROED & HITCHINGS, INC. Civil Engineers and Land Surveyors February 10, 1995 CEO Robert M. Rood, P.LS., P.E. President Ronald O. Goldy, P.E. Senior Vice President Mr. Ron Garrow Steven A. Hitchings, P.LS. City of Federal Way Vice President Hugh R. JJohnston, P.LS. 33530 1st Way South Project Managers Federal Way, WA 98003-6210 JohnE. Anderson, P.E. Robert M. Anderson, P.LS. Re: Century Square Property Brent D. Cummings, P.E. Tax Lot 14, NE Section 17, Township 21, Range 4 East HaroldE. Hagenson, P.E. BRH Job No. 94188.00 JeffreyJ. McManus, P.LS. Darrell C. Nance, P.LS. John J. Weed, P.E. Dear Mr. Garrow: Thank you for the opportunity to meet this last December 14, 1994, and discuss the potential for abandonment of the existing "auxiliary" stormwater retention facility located on the above referenced site. We hope that this letter will document our mutual understanding. Prior BRH correspondence November 4, 1994) and the City's reply (November 29, 1994) establish that the "off -site downstream analysis of stormwater impacts... were performed in the Regional Drainage Study done by CH2M Hill," and that the impact of filling the auxiliary pond wilt be mitigated by the regional detention facility proposed in the Capital Improvement Plan (CIP). In order for the pond to be abandoned and filled, the following sequence of events must take place. 1. The proposed CIP project design and construction must be completed and accepted by the City. The project is currently funded and in design. Construction completion is tentatively anticipated for the fall of 1995. 2. The proponent (Chris Leady/Century Square Associates) must pay a pro rats share of the CIP project. This share will be established by the City following completion of the design. Additionally, the proponent suggests that Tax Lot 14 may be a good location to place the waste material from the CIP project. It is our understanding that the probable process might involve obtaining a Land Surface Modification permit. This matter will be pursued further by the proponent in the near future. We appreciate your assistance in this matter and ask that you alert us immediately if our understanding is incorrect. Sincerely, BUSH, ROED & HITCHINGS, INC. At 41w� Hal Hagenson, P.E. HEH/scc 2009 Minor Avenue East, Seattle, Washington 98102 - Phone 206/323-4144; Fax 206/323-7135 KING COUNTY FIRE PROTECTION DISTRICT NO. 39 FEDERAL WAY FIRE DEPARTMENT 31617 • 1 ST AVENUE SO. FEDERAL WAY, WASHNGTON 98003 September 9, 1996 To: Community Development Review Committee RE: Plat of Century Storm Facility/PRE96-0039/Barker The Fire Marshal's Office has no comments pertaining to this project. Respectfully Submitted, Greg Brozek Fire Marshal's Office Business Phones: Seattle 206-839-6234 Tacoma 206-927-3118 FAX: 206-946-2086 DATE: TO CITY OF FEDERAL WAY DEPARTMENT OF COMMUNITY DEVELOPMENT MEMORANDUM August 15, 1996 Community Development Review Committee (CDRC) Members Stephen Clifton, PW Development Services Manager Dick Mumma, Building Official Mary Cossette, Lakehaven Utility District Greg Brozek, Fire Marshal's Office, KC Fire District #39 FROM: Deb Barker, Associate Planner PROJECT PLANNER: Deb Barl.c; PHONE: 661-4103 PLEASE RESPOND BY: August 29, 1996 (internal), September 5, 1996 (with applicant) FILE NUMBER: PRE 96-0039 PROJECT NAME: Plat of Century storm facility revision proposal 1401 PROJECT ADDRESS: Lot 14, Plat of Century, lAft S. 324th Street PROJECT DESCRIPTION: Proposal to abandon existing interim storm water detention pond and facilities, then fill and grade the lot for future development. PROJECT CONTACT: Hal Hagenson Bush Roed and Hitchings 2009 Minor Ave. East Seattle, WA 98102 (206) 323- q (q U SEPA: Required with more than 400 cubic yards of grading. NOTES: Meeting with applicant is on September 5, 1996 at 9:00 AM utrOF �_ : E C E I V E D MASTL LAND USE APPLICATION JUL17 1996 �� Ry DEPARTMENT OF COMMUNITY DEVELOPMENT BUSH, ROED & HITCHING$ INC. 33530 Ist Way South+Federal Way, WA 98003 APPLICATION NO. CO 3-9 Date A U G. 7 ) 9 % Agent Name of Applicant H �XL H AL EM S DM] Owner - Address 2OD9 MDR AVE, r_ SENT LE, DNA . W6IDL Phone CL)b)- 1221- 4141 41-q Signature�'E'1� BE --\ICIE— WQ cltm C2D(o)4S�-L5504 Owner Name/Address CtNl ORH -S UA` t- ASSDL . 20W-124 ! Al !C- WE one (if different than applicant) Property Location . APPQby SAD WE SI C TI1 t IIJ I L2 ECTjDJ OF 5 314't 4 F Qd' 99 Kroll Pt\ G'E r726 gone Legal Description LDT 14 OF THE CEt•T02LIPLAT AS RECORDED /N VDLOmff 14, PAG'ES (off-'72, VCLDRDS OF bUL CLM-111; WA-941OLZU. Project Description Af3AODDIQ E)OSTINF. 1NTEXIK STOKMO1M DETRMCAIPOND AWD FACJ TIES_ 'Flit AUD 6Wt LDT FOIL FLTL72E DEVELCUPMtLE-- Parcel Number(s) 15 00 50 - D N D IC 1UG CDOWN ASSESSODTLS fl(ORN-L Type of Permit Required: SEPA Cli eklis Notice Mailed Sign Board Site Plan Review R R x Land Surface Modification R R Boundary Line Adjustment Binding Site Plan R R R Short Subdivision * x x Subdivision R R R Shoreline R R Variance R R R Conditional Use R R R Use - Process I R R RFr`cF�l'1 R Use - Process II R R W.A".11,117 JLvcL. J'PkI NT Use - Process III R Quasi -Judicial Rezone R R R Variance R* R R AUG Comp. Plan/Rezone R R Annexation R R ing on *Pre- A [ication Mee R = Re E ed * = Op tional by City MAMR.LA. FRM BUSH, ROED & HITCHINGS, INC. Civil Engineers and Land Surveyors August 7, 1996 Mr. Mike Thomas City of Federal Way 22520 1st Way South Federal Way, WA 98003-6210 Re: Century Square Property Tax Lot 14, NE Section 17, BRH Job No. 94188.04 Dear Mr. Thomas: Township 21, Range 4 East CEO Robert M. Roed, P.L.S., P.E. President Ronald G. Goldy, P.E. Senior Vice President Steven A. Hitchings, P.L.S. Vice President Hugh R. Johnston, P.L.S. Project Managers John E. Anderson, P.E. Brent D. Cummings, P.E. Harold E. Hagenson, P.E. James V. Harrison Jeffrey J. McManus, P.L.S. Darrell C. Nance, P.L.S. John J. Weed, P.E. We are submitting this letter along with a Master Land Use Application package to clearly state the intent of our proposed project. The application package includes prior correspondence establishing the property as an "interim" detention pond which can now be abandoned and filled in preparation for marketing as a legitimate, developable parcel. Our understanding from a July 2, 1996 conversation with Marwan Salloum of the City Surface Water Department, is that the 356th Street Regional Detention Facility is currently under construction and will be completed in November of this year. Further, we understand that the Highway 99 restrictor plates will be removed as part of the project. While the owner has no immediate plans to construct any building or structures on the parcel, their hope is to have a land surface modification permit and grading permit in place so that they may take advantage of fill material which may become available as other local development occurs. We request that a pre -development meeting be scheduled with city personnel from planning, surface water management and plan review as you feel necessary. Please let us know when the earliest meeting can be scheduled. Thank you for your assistance and direction in this matter. Sincerely, BUSH, ROED & HITCHINGS, INC. Hal Hagenson, P.E. Project Manager HEH/acw 2009 Minor Avenue East, Seattle, Washington 98102-3513 - Phone 206/323-4144; Fax 206/323-7135 1-800/935-0508 Internet: brhinc.com CITYJFj'C 33530 1ST WAY SOUTH August 15, 1996 Mr. Hal Hagenson Bush Roed and Hitchings 2009 Minor Avenue East Seattle, WA 98102 RE: PRE-96-0039MEETING FOR PLAT OF CENTURY STORM FACILITY PROPOSAL LOT 14, PLAT OF CENTURY, FEDERAL WAY Dear Mr. Hagenson: (206)661-4000 FEDERAL WAY, WA 98003-6210 The above referenced proposal has been assigned to me as project planner. At this time, the submittal packet has been routed to members of the Development Review Committee. A meeting with project proponents has been re -scheduled as follows: September 5, 1996 - 9:00 AM Community Development, City Hall, first floor 33530 ist Way South Federal Way, WA 98003 We look forward to meeting with you at that time. Please call me at 661-4103 if you have any questions. Sincerely, k'd Deb Barker Associate Planner FILE CITY OF� �ANO, May 26, 1995 33530 1ST WAY SOUTH Mr. Hal Hagenson Bush, Roed & Hitchings, Inc. 2009 Minor Ave. E. Seattle, WA. 98102 Re: Century Square Property Tax Lot 14 Dear Hal: (206) 661-4000 FEDERAL WAY, WA 98003-6210 RECEI VED MAY 3 0 J9Q5 BUSH, ROED 6 HITCHINCS INC. I have received you letter of February 10, 1995 and your recent FAX on the subject of placing fill on Tax Lot 14 of Century Square. The placement of fill would eliminate the supplemental stormwater detention area for the Century Square development. As discussed in our meeting of December 14, 1994 and as summarized in your February 10, 1995 letter, the site may not be filled in until the Kitts Corner and South 336th Street Regional Stormwater Detention and Wetlands/Stream Restoration Project is completed and online. This project is nearing design -completion and is now scheduled for construction in spring of 1996. There is some question regarding the availability of fill material for Tax Lot 14. I strongly suggest that you coordinate with the SWM Manager on this issue. If material excavated from the Kitts Corner project can be -used as fill on Tax Lot 14, the following issues must be satisfied: 1. material is acceptable by the owner; 2. agreement can be reached between the owner and the contractor of the Kitts Corner project on delivery to the site; 3. agreement can be reached between the owner and the city's Surface Water Manager on the schedule for placement of the fill material (filling in facility before the Kitts Corner project is completed); 4. the owner of the site obtain a Land Surface Modification (LSM) approval and a subsequent grading permit for the proposed work; (This process takes a minimum of 90 days and there is no assurance of obtaining such approvals. There are specific criteria for granting LSM's which are listed in the Federal Way City Code, a copy of which is attached. SEPA review may also be required.) 5. the owner of the site pay a pro-rata share of the construction of the Kitts Corner project to mitigate for the elimination of the stormwater storage on Tax Lot 14. (This share will be established after completion of construction.) As I had mentioned in our December meeting and you have reiterated in your February letter, because of the scheduling of the Kitts Corner project and the time it takes to obtain a LSM approval and grading permit, the property owner should submit the application for the LSM and permit as soon as possible. In regard to your questions of schedule and emergency work, you will have to coordinate with the Cityfs Surface Water Manager on the Kitts Corner project schedule and its relation to your schedule for obtaining. LSM approval and a grading permit. Any questions regarding the criteria for obtaining the LSM approval and permit should be directed to the Community Development Department. Also, the work for filling the site is not considered an "emergency". Other fill locations for the materials can be used for the project and the work you propose on Tax Lot 14 is not to alleviate a threat to public health, safety and welfare. If there are any other questions, please give me a call. Sincerely, /&."a ALA�� Ronald Garrow, P.E. Sr. Development Engineer c: Jeff Pratt, SWM Mgr. .. I room,* BUSH, ROED &HITCHINGS, INC. �� BRH Civil Engineers and Land Surveyors CEO February 10, 1995 Robert M. Rood, P.LS., P.E. President Ronald o. ooldy, P.E. Senior Vice President Mr. Ron Garrow SWm A. Hhddnm P•LS. Cityof Federal Way y vice President Hugh R. Johnston. P.LS. 33530 1st Way South ProjectManngets Federal Way, WA 98003-6210 John E.Ande:sou,P-E. Robot M. Anderson. P.LS. Re: Century Square Property Brat D. Cunmings, P.E. Tax Lot 14, NE Section 17, Township 21, Range 4 East HffreyIarold I�agc,�sos, P.E. BRH Job No. 94188.00 McManus, —S. Daercll C. Nance, P.LS. Darrell John J. Weed, P.E. Dear Mr. Garrow: Thank you for the opportunity to meet this last December 14, 1994, and discuss the potential for abandonment of the existing "auxiliary" stormwater retention facility located on the above referenced site. We hope that this letter will document our mutual understanding. Prior BRH correspondence November 4, 1994) and the City's reply (November 29, 1994) establish that the "off -site downstream analysis of stormwater impacts— were performed in the Regional Drainage Study done by CH2M Hill," and that the impact of filling the auxiliary pond will be mitigated by the regional detention facility proposed in the Capital Improvement Plan (CIP). In order for the pond to be abandoned and filled, the following sequence of events must take place. The proposed CIP project design and construction must be completed and accepted by the City. The project is currently funded and in design. Construction completion is tentatively anticipated for the fall of 1995. 2. The proponent (Chris L.eady/Century Square Associates) must pay a pro rata share of the CIP project. This share will be established by the City following completion of the design. Additionally, the proponent suggests that Tax Lot 14 may be a good location to place the waste material from the CIP project. It is our understanding that the probable process might involve obtaining a Land Surface Modification permit. This matter will be pursued further by the proponent in the near future. We appreciate your assistance in this matter and ask that you alert us immediately if our understanding is incorrect. Sincerely, BUSH, ROED & HITCHINGS, INC. 7W 4ro--, Hal Hagenson, P.E. HEH/scc 2009 Minor Avenue East, Seattle, Washington 98102 — Phone 206/3234144; Fax 206/323-7135 c1TY of ►� . * Ed V eqDW00", 33530 1ST WAY SOUTH November 29, 1994 Hal Hagenson, P.E. Bush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, WA 98102 Subject. Tax Lot #14; Century Square Shopping Center Dear Mr. Hagenson: (206) 661-4000 FEDERAL WAY, WA 98003-6210 Per your November 16, 1994 telephone request, this letter responds to your November 4, 1994 letter to Jerry Bibee of CH2M Hill. One conclusion of your November 4, 1994 letter seems to be that off -site downstream analysis of storrnwater impacts for Tax Lot #14 of Century Shopping Center were performed in the Regional Drainage Study done by CH2M Hill. We concur with this conclusion. Other discussion in the referenced letter suggests that prior agreements between the developer of Century Square and King County allow the filling of an "auxiliary" pond located on Tax Lot 14. While this does appear to be the case, we would suggest that you confirm the agreements with Ron Carrow, Federal Way's Senior Development Review Engineer. He can be reached by calling 661-4137. I hope that this letter meets your needs. If you have any further questions or require any additional information, please do not hesitate -to call me at 661-4095. �ir,cere y, of t, P.E. P ect Engineer JTP\jg cc: Ron Garrow, Sr Development Review Engineer o:cMmry.er R E C E I V E C: DEC 6 Z BUSH. ROED 8 HIiCHINGS INC M BRH BUSH, ROED & HITCHINGS, INC. Civil Engineers and Land Surveyors President November 4, 1994 Robert M. Road, P.LS., P.E. Senior Vice Prvddent Stevan A HitrJ bw6 P.LS. Vice Presidents A Pdnclpda Ronald 0. Goldy, P.E. Mr. Jerry Bibee Hugh R. Johnston, P.LS. CH2M Hill Project Manager' P. O. Box 91500 John L "'dersm P.E. Bellevue, WA 98009-2050 Robot M. Aoderaoq P Boat D. Cluaminga. P - Herold L Hagauati P.E. Re: Century Square Property Je&ry J. McMarnu, P.LS. Tax Lot 14, NE Section 17, Township 21, Range 4 East Daman C. Naacq P.LS. BRH Job No. 94188.00 John J. weed. P.E. CH2M Hill Ref. No. NPW37403.A0 Dear Mr. Bibee: Pursuant to our conversation yesterday, we would like to take this opportunity to document our understanding. First, for contextual clarity, some background history is in order. The subject site, located on the south side of South 324th Street, about 400 feet west of Highway 99, in Federal Way, Washington, is currently occupied by an auxiliary stormwater detention pond. This pond -is hydraulically connected to the primary detention pond for the Century Square complex, located directly to the north on South 324th Street (see attachment). Both ponds discharge to a single control manhole, which is equipped with an electric motor operated valve and liquid level sensors. When water in the primary pond reaches a designated elevation, the valve closes, and the ponds retain all tributary runoff until overflow conditions are attained or storm conditions subside. Correspondence and designs by Wilsey and Ham, circa, 1976 (on file at the City) indicates this auxiliary system was intended to mitigate impacts on the Highway 99 storm pipe trunk and that the pond and non -essential appurtenances could be removed once the f hgway 99 trunk was adequately improved. At that time the trunk consisted of 18" diameter piping and was hydraulically inadequate. Subsequently, the trunk system was replaced with 24" to 48" diameter piping. However, post construction downstream flooding and ensuing litigation led to the installation of 18" diameter orifice plates within the trunk to constrict trunk capacity back to the pre -improvement levels. Currently, the city of Federal Way has contracted with CH2M Hill to prepare a Comprehensive Drainage Plan, consisting of a Regional Drainage Analysis and Capital Improvement Plan for the WH08, WH10, and WH11 sub -catchments of the Hylebos Basin. Contemplated improvements include additional regional detention facilities improvements, and removal of the Highway 99 trunk system orifice constrictions. Hydraulic analysis results indicate that the Highway 99 trunk system will operate within acceptable limits after implementation of recommended improvements. These projects are funded, design is underway, and construction competition is currently scheduled for the fall of 1995. 2009 Minor Avenue East, Seattle, Washington 98102 - Phone 206/3234144; Fax 206/323-7135 WSH, ROED do HUCHINGS, INC. CH2M HELL Mr. Jerry Bibee November 4, 1994 Page 2 CONVERSATION UNDERSTANDING As I described in our phone conversation, Jeff Pratt, with the City Public Works Department, had asked that BRH verify pertinent assumptions used in the Comprehensive Drainage Plan. To that end, BRH has received and reviewed CH2M Dill Technical Memos Nos. 1-1 and 2-1. Although the memo's make reference to the fact that SWM model flows were routed through detention pond facilities located on the west lateral at South 324th Street, you have indicated to us that the referenced pond is the primary pond located north of South 324th Street and not the auxiliary pond located on tax lot 14. Both the SWM and HSPF models assume that the tax lot 14 pond does not exist. Further, city zoning maps (which form that basis of the studies existing and future condition scenarios) show tax lot 14 to be zoned for commercial uses. We appreciate your assistance in this matter, and ask that you alert us immediately if our understanding is incorrect. Sincerely, BUSH, ROED AND HTTCHINGS, INC. 1�d wwl� Hal Hagenson, P.E. W. Chris Leady, Century Square Associates Jeff Pratt, city of Federal Way e E1• r• 0 '91-A rm f23 l' 1 7 / 101007b0 �� CET T 1z 20 PORTION Of THE NE.114, S'EC.17,121NJAE,W.M. 17KING CGUallNTY, Z! 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H :.. 324 th STREETS 7 ell lo •.�„, �'i ._ - F�� pp Max W S. 409 IN1F-RIM F&TENTiON POND L I NOTE: SL ❑s Gx�[3 tLS tit. ..� � _ ^•� u- '. ,�•• � � . T•f' . ! . r WitESq •IEVEt Rti5fa5.. �!tr�ra.+:r'•�r r[r,,�•�rr)% • '" F •• `, •' � `egg � • � f �1_ ' a. f - • _ ,' � - � . ,: - ii:,"�r . 1i17r-B4`C.M.P.. .i?.�-r J �Y •{Q� ! :w .-,.• Lr`,�d FLAY• rY _ trf�• �Q�fJ ) ! I .. i' .. ^,.c.• _ -4 10 Sti ",1:. .. - , .. ...r '..J».•y 6 . •gip-T'CC Roc . INTERIM PLAN TER DRAINAGE PLAN FDR `^` � �Wft SI:l'�:H M r MASTER }, CENTURY I I RINl: r., qr�' . 1 w�IM13•.•Mx��l�l wUYrla.. ��rX.. �. ... FEDERAL WAY, WASHINGTON , �i • ... .. Shw... i4_we/ Sh�In FYr[•+ 8e+•n I .. � � e"e • s�1` r r ' ` { � . 7 �£ ' 1 I •. `�..---•-r•+�.+w�•rio"�r•nY'.+..�..r _ -. �+•rr iN �'^`^�`�^' - wYr� "•�• "r" '&WNW& "'y'1+•Wlk.- •411.�-01 NwOo v r. - interoffice M E M G R A N D U M to: Julie Pappa from: Fei Tang subject: Plat of Century storm facility revision date: August 22, 1996 SWM has reviewed the proposal to abandon the existing interim storm water detention pond in lot 14, Plat of Century and facilities (file number PRE 96-0039). We have the following comments: The applicant contends that the storm water detention pond located at Lot 14 of the Century Plat "was intended to mitigate impacts on the Highway 99 storm pipe trunk and that the pond and non -essential appurtenances could be removed once the Highway 99 storm trunk was adequately improved." The attached correspondence between Wilsey and Ham, Inc., and King County circa 1976 seems to bear out this contention. 2. As indicated in the attached SWMMiinput file prepared by CH2M HILL, ,for both existing and future conditions, SWNfM model simulations were made based on the assumption that the tax lot 14 pond does not exist. This means that the improvement of the Highway 99 trunk system was designed to accommodate the abandonment of the pond on lot 14. As stated in the letter from BRH to the City of Federal Way dated February 10, 1995, in order for the pond to be abandoned and filled, the proposed CIP project design and construction on Highway 99 must be completed and accepted by the City. The Kitts Corner and South 336th Street Regional Stormwater Detention and Wetlands/Stream Restoration Project is under construction and is scheduled for completion in the Fall of 1996. The pond cannot be abandoned until this project is complete and on line. 4. As stated in the letter from BRH to the City of Federal Way dated February 10, 1995, the proponent (Chris Leady/Century Square Associates) must pay a pro rata share of the CIP project should they desire to offset any detention associated with the development of this lot. It is necessary for the applicant to provide information to demonstrate that the sufficient conveyance capacity exists from the project site to the Highway 99 trunk to convey the increase in runoff associated with the abandonment of the pond. 6. The permission to fill the detention pond does not release the applicant from the obligation to comply with on -site water quality requirements. CC: Jeff Pratt Day File C:\PLNREV\V\CENTLJRY\PREI.WPD CITY ❑F 33530 1 ST WAY SOUTH May 26, 1995 Mr. Hal Hagenson Bush, Roed & Hitchings, Inc. 2009 Minor Ave. E. Seattle, WA. 98102 Re: Century Square Property Tax_ Lot 14 Dear Hal: (206) 661-4000 FEDERAL WAY, WA 98003-6210 RECEIVED MAY 3 0 lq45 . BUSH, ROEO & HITCH'"S INC. I have received you letter of February 10, 1995 and your recent FAX on the subject of placing fill on Tax Lot 14 of Century Square. The placement of fill would eliminate the supplemental stormwater detention area for the Century Square development. As discussed in our meeting of December 14, 1994 and as summarized in your February 10, 1995 letter, the site may not be filled in until the Kitts Corner and South 336th Street Regional Stormwater Detention and Wetlands/Stream Restoration Project is completed and on line. This project is nearing design -completion and is now scheduled for construction in spring of 1996. There is some question regarding the availability of fill material for Tax Lot 14. I strongly suggest that you coordinate with the SWM Manager on this issue. If material excavated from the Kitts Corner project can be used as fill on Tax Lot 14, the following issues must be satisfied: 1. material is acceptable by the owner; 2. agreement can be reached between the owner and the contractor of the Kitts Corner project on delivery to the site; 3. agreement can be reached between the owner and the city's Surface Water Manager on the schedule for placement of the fill material (filling in facility before the Kitts Corner project is completed); 4. the owner of the site obtain a Land Surface Modification (LSM) approval and a subsequent grading permit for the proposed work; (This process takes a minimum of 90 days and there is no assurance of obtaining such approvals. There are specific criteria for granting LSM's which are listed in the Federal Way City Code, a copy of which is attached. SEPA review may also be required.) 5. the owner of the site pay a pro-rata share of the construction of the Kitts Corner project to mitigate for the elimination of the stormwater storage on Tax Lot 14. (This share will be established after completion of construction.) As I had mentioned in our December meeting and you have reiterated in your February letter, because of the scheduling of the Kitts Corner project and the time it takes to obtain a LSM approval and grading permit, the property owner should submit the application for the LSM and permit as soon as possible. In regard to your questions of schedule and emergency work, you will have to coordinate with the Cit.y's Surface Water Manager on the Kitts Corner project schedule and its relation to your schedule for obtaining LSM approval and a grading permit. Any questions regarding the criteria for obtaining the LSM approval and permit should be directed to the Community Development Department. Also, the work for filling the site is not considered an "emergency". Other fill locations for the materials can be used for the project and the work you propose on Tax Lot 14 is not to alleviate a threat to public health, safety and welfare. If there are any other questions, please give me a call. Sincerely, le&� AAAOj Ronald Garrow, P.E. Sr. Development Engineer c: Jeff Pratt, SWM Mgr. n BUSH, ROED & HITCHINGS, INC. BRH Civil Engineers and Land Surveyors CEO February 10, 1995 Robert K Rood, RLS., P.E. President Ronald d. Goldy, P.E. Senior Vice President Mr. Ron Garrow Steven A. Hitcldngs, P.LS. Cityof Federal Wayvice President Hugh R. Johnston, P.LS. 33530 1st Way South Project Mwmgers Federal Way, WA 98003-6210 JohnE. Anderson, P.E. Robert M Anderson, P.LS. Re: Century Square Property Brent D. Cummings, P.E. Tax Lot 14, NE Section 17, Township 21, Range 4 East McManus,, P.E. HaroldJeffrey BRH Job No. 94188.00 McManus, Nance,P.1-S. Darrell C. Nance, P.LS. Darrell John J. Weed, P.E. Dear Mr. Gar -row: Thank you for the opportunity to meet this last December 14, 1994, and discuss the potential for abandonment of the existing "auxiliary" stormwater retention facility located on the above referenced site. We hope that this letter will document our mutual understanding. Prior BRH correspondence November 4, 1994) and the City's reply (November 29, 1994) establish that the 'off -site downstream analysis of stormwater impacts... were performed in the Regional Drainage Study done by CH2M Hill," and that the impact of filling the auxiliary pond will be mitigated by the regional detention facility proposed in the Capital Improvement Plan (CIP). In order for the pond to be abandoned and filled, the following sequence of events must take place. 1. The proposed CEP project design and construction must be completed and accepted by the City. The project is currently funded and in design. Construction completion is tentatively anticipated for the fall of 1995. 2. The proponent (Chris Leady/Century Square Associates) must pay a pro rasa share of the CIP project. This share will be established by the City following completion of the design. Additionally, the proponent suggests that Tax Lot 14 may be a good location to place the waste material from the CIP project. It is our understanding that the probable process might involve obtaining a Land Surface Modification permit. This matter will be pursued further by the proponent in the near future. We appreciate your assistance in this matter and ask that you alert us immediately if our understanding is incorrect. Sincerely, BUSH, ROED & HITCHINGS, INC. 4t 4PO40-- Hal Hagenson, P.E. HEH/scc 2009 Minor Avenue East, Seattle, Washington 98102 - Phone 206/323-4144; Fax 206/323-7135 CITY OF 33530 1ST WAY SOUTH November 29, 1994 Hal Hagenson, P.E. Bush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, WA 98102 Subject: Tax Lot il14; Century Square Shopping Center Dear Mr. Hagenson: [206] 6.61-4000 FEDERAL WAY, WA 98003-6210 Per your November 16, 1994 telephone request, this letter responds to your November 4, 1994 letter to Jerry Bibee of CH2M Hill. One conclusion of your November 4, 1994 letter seems to be that off -site downstream analysis Of stormwater impacts for Tax Lot #E14 of Century Shopping Center were performed Regional Drainage Study done by CH2M Hill. We concur with this conclusion, in the Other discussion in the referenced 'letter suggests that prior agreements between the developer Of Century Square and King County allow the filling of an "auxiliary" pond located on Tax Lot 14. While this does appear to be the case, we would suggest that you confirm the agreements with Ron Garrow, Federal Way's Senior Development Review Engineer. He can be reached by calling 661-4137. I hope that this letter meets your needs. If you have any further questions or _require any additional information, please do not hesitate "to call me at 661-4095. y, ct, P.E. Sincere r TrP\Jg cc: Ron Garrow, Sr Development Review Engineer r e:CMtUry.hr R E C, E: d `,� E i.: DEC b 1 BUSH, ROED & HIiCHINGS INC BUSH, ROED & HITCHINGS, INC. ®RH November 4, 1994 Mr. Jerry Bibee CH2M Hill P. O. Box 91500 Bellevue, WA 98009-2050 Civil Engineers and Land Surveyors Re: Century Square Property Tax Lot 14, NE Section 17, BRH Job No. 94188.00 Township 21, Range 4 East CH2M Hill Ref. No. NPW37403.AO Dear Mr. Bibee: President Robert M. Rood, P.LS., P.E. Senior Vice PresWewt Steven a Hitdiinga, P.LS. Vice Presidents A Principle Ronald a. Goldy, P.E. Hugh R. Johnston, P.LS. Project Managers John E. Anderson, P.E. Robert M. Anderson. P.LS. &gat D. Qunmingt, P.E. Harold E Hagernoq P.E. Jefliey J. McManus, P.LS. Darrell C. Nance, P.LS. John J, weed, P.E. Pursuant to our conversation yesterday, we would like to take this opportunity to document our understanding. First, for contextual clarity, some background history is in order. The subject site, located on the south side of South 324th Street, about 400 feet west of Highway 99, in Federal Way, Washington, is currently occupied by an auxiliary stormwater detention pond. This pond -is hydraulically connected to the primary detention pond for the Century Square complex, located directly to the north on South 324th Street (see attachment). Both ponds discharge to a single control manhole, which is equipped with an electric motor operated valve and liquid level sensors. When water in the primary pond reaches a designated elevation, the valve closes, and the ponds retain all tributary runoff until overflow conditions are attained or storm conditions subside. Correspondence and designs by Wilsey and Ham, circa, 1976 (on file at the City) indicates this auxiliary system was intended to mitigate impacts on the Highway 99 storm pipe trunk and that the pond and non -essential appurtenances could be removed once the Highway 99 trunk was adequately improved. At that time the trunk consisted of 18" diameter piping and was hydraulically inadequate. Subsequently, the trunk system was replaced with 24" to 48" diameter piping. However,, post construction downstream flooding and ensuing litigation led to the installation of 18" diameter orifice plates within the trunk to constrict trunk capacity back to the pre -improvement levels_ Currently, the city of Federal Way has contracted with CH2M Hill to prepare a Comprehensive Drainage Plan, consisting of a Regional Drainage Analysis and Capital Improvement Plan for the WH08, WH10, and WHI I sub -catchments of the Hylebos Basin. Contemplated improvements include additional regional detention facilities improvements, and removal of the Highway 99 trunk system orifice constrictions. Hydraulic analysis results indicate that the Highway 99 trunk system will operate within acceptable limits after implementation of recommended improvements. These projects are funded, design is underway, and construction competition is currently scheduled for the fall of 1995. 2009 Minor Avenue East, Seattle, Washington 98102 - Phone 206/3234144; Fax 206/323-7135 WSH, ROED & HITCHINGS, INC. CH2M HILL Mr. Jerry Bibee November 4, 1994 Page 2 CONVERSATION UNDERSTANDING As I described in our phone conversation, Jeff Pratt, with the City Public Works Department, had asked that BRH verify pertinent assumptions used in the Comprehensive Drainage Plan. To that end, BRH has received and reviewed CH2M Bill Technical Memos Nos. 1-1 and 2-1. Although the memo's make reference to the fact that SWM model flows were routed through detention pond facilities located on the west lateral at South 324th Street, you have indicated to us that the referenced pond is the primary pond located north of South 324th Street and not the auxiliary pond located on tax lot 14. Both the SWM and HSPF models assume that the tax lot 14 pond does not exist. Further, city zoning maps (which form that basis of the studies existing and future condition scenarios) show tax lot 14 to be zoned for commercial uses. We appreciate your assistance in this matter, and ask that you alert us immediately if our understanding is incorrect. Sincerely, BUSH, ROED AND HITCHINGS, INC. Hal Hagenson, P.E. CC.' Chris Leady, Century Square Associates Jeff Pratt, city of Federal Way 1,11 - 'I . ' ti1ULSEY&ANT1 NCI 631 STRANDER BOULEVARD TUKWILA, WASHINGTON 98188 May 17, 1976 File No. 3-1885-0101-20 King County Division of Hydraulics Department of.Public Works 900 County Administration Building Seattle, Washington 98104 Attention: Mr. Larry Gibbons, P.E. Dear Larry: E Earl P. Wilsey (1892-1957) Tejephorip(2 6) �g814 LPIL�' t • rli,�'I' � -i � ,, 1� j4'' ij . KING COUNTY � l'y�� I • "--:C:l J.YDP.ULIC- fut-� RE: CENTURY CfTi-- DRAINAGE Over the past few months we have met several times to discuss the procedures and development of drainage plans for the expansionof the Century project located on the west side of Pacific Highway (US 99) between South 320th Street and South 324th Street. Based on your informal approval of the approach taken to this problem, we have prepared the attached master drainage concept plan with accompanying calculations for your. review and approval. The basic criteria for design as set forth by you was as .follows: I. The basic storm criteria will be a 1:25 year storm with a 24 hour storm placed in the third day of a 7 day storm cycle. 2. At the time, during this storm cycle, where the capacity of the existing drainage basin system is exceeded and flooding becomes imminent, the drainage outflow from the expansion area of Century must be -fully retained until the flooding has passed, at which time the outflow from Century may be resumed. 3. At such time as downstream drainage facilities are improved on Pacific Highway the requirement of full retention will -be removed and the system may then operate on partial retention of the expansion area such that peak runoff rates will not be increased over those existing prior to development. In order to establish a reasonable pattern for the full 25 year, 7 day storm cycle and 24 hour storm, a synthetic curve of cumulative rainfall was developed using the accumulative precipitation data provided for the West Campus Development, in the same area of King County. This curve is shown on Sheets 1 and 2 of the attached calculations. Utilizing data from the Pacific Highway drainage basin study it was determined that 137.81 equivalent acres of 100% runoff were tributary to the 18 inch drainage engineering • planning • surveying • environmental analysis • mapping • systems Mr. Larry Gibbons, P.E. Page Two May 17, 1976 system restriction immediately south of the Century site as shown on Sheet 3 of the attached calculations. Sheet 4 of the calculations develops the cumulative runoff from the existing tributary basin for the 7 day cycle, and indicates average rates over this 7 day cycle. Also indicated is the runoff resulting from the 3rd day 24 hour storm with its associated average runoff rates over this period. This calculation is also shown for the tributary basin with the Century expansion area deleted. A check of the capacity of the 18 inch outfall line from this area determined that a reasonable capacity for this line without backup or flooding was approximately 10 c.f.s. Sheets 5, 5A & 5B of the calculations develop the areas to be fully retained and the required storage capacity for the interim and permanent storage basins. All of the preceding data was then plotted on the graph shown on Sheet 6. This plot indicates the total runoff from the tributary area as curve "A" the synthetic 7 day storm. During the lst 2 days of this cycle the rate of runoff is within the capacity of the existing system therefore no backup occurs. Commencing with the third day, and the imposition of the 24 hour storm, runoff begins to exceed the 10 cfs outfall system capacity until at approximate elevation 404, flooding begins. At this point the outlet from the proposed Century system must be shut off until flooding ceases and the existing system again becomes adequate. Following shutdown runoff is being taken from the area through the existing system at the calculated rate of 10 c.f.s, curve "C".' Wheri the cumulative out- flow (curve "C") meets the cumulative runoff of the area tributary all backup has been removed from the area and the Century system, which has been storing its total runoff, may then begin emptying its storage reservoir This point is shown at day 4.3 on the graph. From this point the average outflow rate until day 7 (end of rainfall) for the total basin, including Century City is approximately 4.3 c.f.s., well within the capability of the outfall system. Page 7 compares the total storage requirement to contain the runoff from the beginning of day 3 until the system opens at day 4.3 with the available storage developed on Sheets 5, 5A & 5B. This calculation indicates a storage require- ment of 329,045 cubic feet for the full development of the expanded Century site. This indicates that in addition to the permanent retention basin for the site, a temporary basin of 288,439 cubic feet will be required until the downstream facilities on Pacific Highway are improved. The roaster Drainage Plan established preliminary sizing and working elevations for these basins. It is proposed that when the hydraulic gradient on Pacific Highway at South 324th Street rises to elevation 404, the Century City system will close automatically and commence storage. When the gradient lowers to this point the system will open automatically and empty the storage reservoirs. It is proposed that an overflow device, bypassing the shutoff gate, be installed in the reservoir to guard against the occurrence of a higher intensity storm and prevent over -topping. gr. Larry Gibbons, P.E. Flay 17, 1976 Page Three With regard to those westerly areas of the site, which are presently in another water- shed draining westerly from the site, it is proposed to maintain this drainage, with appropriate retention facilities to reduce the peaks after development to previously existing peaks. A copy of the drainage calculations for this area is also attached herewith for your review and approval. I believe the above system as proposed conforms with the criteria as set forth by you, however, if any questions should arise please call me as we are anxious to proceed with the final design as rapidly as possible. ,. Very truly yours, WILSEY & HAM, C. l Dick Reeves, P.E. Project Engineer DR/kss interoffice M E M O R A N D U M Public Works Development ervices Divislon To: Deb Barker, Associate Planner From: Julie M. Pappa, Engineering Plans Reviewer II� Subject: Plat of Century Storm Facility Revision Proposal: PRE 96-0039 Lot 14, Plat of Century, 1401 South 324th Street Date: September 23, 1996 Public Works Development Services Division has reviewed the Subject application to abandon an existing storm water detention pond and associated facilities, then rill and grade the lot for future development. Public Works has received plans and related correspondence for review as follows: ► Interim Plan, Master Drainage Plan for Century prepared by Wilsey & Ham, Inc. ► Plan and Profile Drawing for 324th Street, dated December 21, 1976 prepared by Wilsey & Ham, (Sheets 5 and 8 of 14). ► Correspondence dated May 26, 1995 to Mr. Hal Hagenson of Bush, Roed & Hitchings, Inc. from the City. ► Correspondence dated November 29, 1994 to Mr. Hal Hagenson of Bush, Roed & Hitchings, Inc. from the City. ► Correspondence dated November 4, 1994 to Mr. Jerry Bibee of CH2M Hill from Mr. Hal Hagenson of Bush, Roed & Hitchings, Inc. As a result of the collective review of the plans and related correspondence, Public Works has the following pre -application comments: Storm Water The application proposes a Land Surface Modification (LSM) and Administrative approval for abandonment of a recorded easement on the Plat of Century. A Level 1 Off -site Analysis of each down stream system is required per the King County Surface Water Design Manual (KCSWDM), the City's amendments, and any conditions through the SEPA process. Surface water runoff control is required for this project, including collection and conveyance of stormwater runoff to an acceptable discharge location. Also required is a written narrative on the relevance of the 7 Core and 12 Special Requirements in the KCSWDM to this proposal. The applicant maintains that the storm water detention pond located at Lot 14 of the Century Plat "was intended to mitigate impacts on the Highway 99 storm pipe trunk and that the pond and non -essential appurtenances could be removed once the Highway 99 storm trunk was adequately improved." The attached correspondences between Wilsey and Ham, Inc., and King County, dated May 17, 1976 and June 29, 1976 concur with this contention. A Surface Water Management Model (SWMM) input file was prepared by CH21A HILL (excerpt attached), for both existing and future conditions. Model simulations from the SWMM input file did not include the Tax Lot 14 detention pond. This means improvement of the Highway 99 trunk system was designed to accommodate abandonment of the detention pond on Lot 14. As stated in the letter from Bush, Roed & Hitchings, Inc. (BRH) to the City of Federal Way dated February 10, 1995, in order for the pond to be abandoned and filled, the proposed Capital Improvement Program (CIP) project design and construction on Highway 99 must be completed and accepted by the City. The Kitts Corner and South 336th Street Regional Stormwater Detention and Wetlands/Stream Restoration Project is under construction and is scheduled for completion in the Fall of 1996. The detention facility cannot be abandoned until this project is complete and operational. The attached BRH letter to the City, dated February 10, 1995, also states that project proponents, Century Square Associates, must pay a pro rata share of the CIP project to mitigate detention facilities abandoned with development of Lot 14. It is necessary for the applicant to provide information to demonstrate that sufficient conveyance capacity exists from the project site to the Highway 99 trunk to convey the increase in runoff associated with abandonment of the pond. This information must include an analysis extending at least one block south of South 324th Street on Highway 99. Provisions must also be made for diversion of any pipes currently discharging into the existing detention facility. Water Ouality Fill of the detention pond does not release the applicant from the obligation to comply with on - site water quality requirements. Erosion Contras A Temporary Erosion and Sediment Control Plan must be prepared prior to the issuance of a permit for Land Surface Modification, (LSM). Frontage Improvements Proposed site improvements exceed 25 percent of the assessed or appraised value of the property. Per City Code Section 22-1473, full width street improvements must be installed along the entire frontages. The property frontages are currently improved; therefore, the proposed project is not subject to City Code Section 22 requirements. Any proposed improvements associated with this project that encroach upon the public right-of-way will require a Right -of -Way Permit before construction of improvements. Any damage to the public right-of-way because of construction shall be repaired by the applicant. Traffic A haul route plan for the proposed import of earth material shall be submitted to the Public Works Development Services Division for review and approval before issuance of a permit for Land Surface Modification. Title Regori A preliminary title report for the property shall be prepared and submitted to the City Public Works Development Services Division. The title report should include any easements within or of benefit to the property. Soils Report Over 4,000 cubic yards of earthwork are proposed for the project. Pursuant to Section 22- 1286 of the City Code, a soils report must be prepared by a qualified professional engineer licensed in the State of Washington describing how the proposed development will impact each of the following on the subject property and nearby properties: ► Slope stability and land sloughing. No. Seismic hazards. ► Groundwater. IN. Seeps, springs and other surface waters. For this project, the report should also address: ► Subsurface conditions. ► Material testing. ► Site preparation. ► Import material recommendations. ► Structural fill placement. ► Compaction requirements. ► Potential for differential settlement. ► Construction methods. ► Slope stabilization. ► Construction monitoring and testing. ► Site drainage. ► Erosion control. Bonds ► A performance bond in the amount of 120 percent of the engineer's estimate of cost of site work and, if applicable, street improvements to be performed is required prior to issuance of any building permits. Fees Public Works fees for this project will include the following: ► Commercial development construction plans $480.00 (Up to 12 hours of review time) Supplemental plan review $ 40.00/hour Construction inspection $ 35.00/hour c Stephen Clifton, Development Services Manager Jeff Pratt, Surface Water Manager Gary Barnett, Senior Development Engineer Fei Tang, SWM Engineer L:\PRMSYS\DOCUMENT\PR.E96-00.39\PWO91796.DOC January 2, 1997 Mr Hal Hagenson, P.E. Bush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, WA 98102-3513 RE: Lot 14, Plat of Century Storm Facility Revision Proposal Applications LSM96-0003 and SEP96-0039 Dear Mr. Hagenson: The geotechnical engineering study, provided by Geo Group Northwest, Inc., is lacking definitive information about the proposed fill that must be placed to create a buildable site at the present detention pond. Without a specific proposed plan for filling the pond it shall be assumed that the engineer's recommendation for structural fill placement is to be followed. Therefore, the following conditions will apply to the land surface modification proposal until a fill plan is provided. The site preparation work shall comply with the conditions of Section 3.3 of the geotechnical report. Remove surface vegetation and strip the soil containing organic materials. Include proof rolling of the pond basin surface to find any soft spots or disturbed ground conditions. Over -excavate and re - compact the subsoil at individual weak spots. The existing earth in the pond basin shall be re -compacted to meet structural fill requirements of Section 3.4 to three feet below the surface. All fill material to be placed in the pond basin shall meet the requirements of Section 3.4 from the geotechnical report. Provide fill material that is not moisture sensitive when working in wet conditions. Compact the structural fill to 95% maximum density every where since there is no proposed building footprint with the site fill proposal. Comply with the requirements of Appendix Chapter 33 of the 1994 Uniform Building Code for all grading and fill work that will occur as part of the pond infill project. Respectfully, Ken Cornwall Lead Plans Examiner KSC/ksc(KC60039A.DOC) C: Deb Barker, Associate Planner Julie Pappa, Engineer Plans Reviewer Dick Mumma, Building Official BUSH, ROED & HITCHINGS, INC. BRH Civil Engineers and Land Surveyors CEO December 6, 1996 Robert M. Roed, P.L.S., P.E. President Ronald G. Goldy, P.E. Senior Vice President Steven A. Hitchings, P.L.S. Julie M. Pappa Vice President City of Federal Way - Public Works Hugh R. Johnston, P.L.S. 33530-1st Way South Project Managers Federal Way, WA 98003-6210 John E. Anderson, P.E. Brent D. Cummings, P.E. Harold E. Hagenson, P.E. Re: PRE 96-0039 James V. Harrison Lot 14, Plat of Century Storm Facility Revision Proposal Jeffrey J. McManus, P.L.S. Darrell C. Nance, P.L.S. John J. Weed, P.E. Dear Julie: In your September 23, 1996 Memo, under the heading of Traffic, you requested that " a haul route plan for the proposed import of earth material shall be submitted to the Public Works Development Services Division for review and approval before issuance of a permit for Land Surface Modification. This requirement presents a problem. The owner anticipates that he will procure fill dirt from local construction projects where the contractor is looking for an approved "dump site". This strategy will hopefully save the owner significant cost since he will have more: latitude to negotiate price as opposed to simply buying and importing material from a gravel pit or similar source. Implicit in this strategy is the distinct probability that the fill material may come from several different sources, none of which can presently be identified. The owner has deferred identifying potential fill sources until he has a permit in hand because any negotiation for a potential source would be dependent on the source excavation construction schedule, such that the owner could place himself in jeopardy of contractual non-performance should the permit be unobtainable for any reason. We respectfully request that this requirement be waived or modified to eliminate this problem. We'd be happy to discuss this with you in hopes that we can arrive at a mutually satisfactory solution. r' Sincerely, BUSH, ROED & HITCHINGS, INC. h" /�� Hal Hagenson, P.E. Project Manager cc: Chris Leady Century Square Associates 2009 Minor Avenue East, Seattle, Washington 98102-3513 - Phone 206/323-4144; Fax 206/323-7135 1-800/935-0508 Internet: brhinc.com i n#eroff ice M E M O R A N D U M to: Deb Barker from: Fei Tang 7 T subject: Lot 14 Plat of Century date: June 10, 1997 The TIR that revised May 21, 1997 failed to correct a technical error which I pointed to the applicant during our phone conversation on May 9, 1997. Specifically, in the 25-year runoff calculation, the precipitation should be 3.40 inches instead of 0.43 inches that was used for the subbasin B-25. I checked the calculation with the corrected value. The error will not affect the final conclusion of the TIR. However, the error should be corrected for the documentation. CC: Jeff Pratt Trent Ward DayFile IGiPEIPROAPLNREVWV2 NIURYIHRROILW PD interoffice M E M O R A N D U M to: Trent Ward from: Fei Tang T—� T, subject: TIR for Lot 14 - Plat of Century date: June 4, 1997 I have reviewed the TIR of the subject project dated on December 11, 1996, and its revisions dated on April, 1, 1997, April, 22, 1997, and May 27, 1997. The analysis is satisfactorily completed and I have no further comment. CC Jeff Pratt Deb Barker DayFile K:\FEIPROAPLNREVW\CENTURY\FINALWPD OWNERS LOT 14 - PLAT OF CENTURY BRH JOB NO. 94188 RECEIVED CITY OF FEDEN [AL WAY BUILDIN CENT. COMMENTS 038090-0010-09 JOUFLAS PETER T & SANDRA H 504135 C/O WESTERN STATES REALTY 13010 NE 20TH ST 4C BELLEVUE-WA 98005 038090-0020-07 PIZZA HUT INC W101025 PO BOX_970 WICHITA KS 150050-0050-01-• KAUFMAN RONALD 05197.8 X EXECUTIVE-HOUSE.-INC 7517 GREENWOOD,AVE N SEATTLE WA 36AO14 67201 961399 98103 ° 150050-DO70-07 LABROC-II°LP/ROSS PLAZA 610205 { C/O FLANAGAN:-.BAL` PO BOX:811097 CHICAGO'IL' 60681 150050-0080-05 LABROC II LP/ROSS PLAZA 610206� C/O FLANAGAN - BAL PO BOX 811097 CHICAGO'IL 150050-0090-03 KEY BANK.OF WASH 1119 PACIFIC,AVE MS0291 TACOMA WA 150050-0140-03 RODGERS S MICHAEL+MARCIA CHRIS C LEADY 2000 124TH AVE NE BLDG B BELLEVUE WA 60681 451105 98411 919999 STE 100 ' 98005 150050-0150-00 KIMBALL WILLIAM R 741962 PO BOX 26867 SAN FRANCISCO CA 94126 172104-9014-07 CITY OF FEDERAL WAY. 179700 33530. 1ST WAY S FEDERAL WAY.WA 98003 172104-9083-03, JOUFLAS PETER-T & SANDRA.H 504135 C/O•WESTERN STATES REALTY 13010 NE 20TH ST.xC BELLEVUE WA 98005 172104-9084-02' ALHADEFF:JACK C ET=AL! 249999 POBOX 19435 SEATTLE WA. 98109 172104-9097-07 SSC PROPERTY.HOLDINGS INC: 479999 OPERATIONS ACCOUNTING' 1201:THIRD AYE■ SUITE 2200 SEATTLE WA 98101 OCCUPANTS LOT 14 - PLAT OF CENTURY DEC 1 6 199B BUILDINC CENTURY SQUARE SELF- SCOREBOARD PUB MARTY'S FOR HAIR STORAGE 1200 SOUTH 324TH STREET 1200 SOUTH 324TH STREET 1120 SOUTH 324TH STREET FEDERAL WAY, WA 98003 FEDERAL WAY, WA 98003 FEDERAL WAY, WA 98003 ALLSTATE INSURANCE CO. 1200 SOUTH 324TH STREET FEDERAL WAY, WA 98003 JEFFERY'S JEWERY 1200 SOUTH 324TH STREET FEDERAL WAY, WA 98003 TERYAKI SUITE A-3 1320 SOUTH 324TH STREET FEDERAL WAY, WA 98003 MULTIMEDIA KID SUITE A-8 1320 SOUTH 324TH STREET FEDERAL WAY, WA 98003 PLAY IT AGAIN SPORTS SUITE A-116 1320 SOUTH 324TH STREET FEDERAL WAY, WA 98003 ROUND TABLE PIZZA SUITE B-213 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 AMERICAN SUITE B-210 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 INSIGNIA 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 ELECTRIC BEACH 1200 SOUTH 324TH STREET FEDERAL WAY, WA 98003 CRYSTAL CLEANERS SUITE A-1 1320 SOUTH 324TH STREET FEDERAL WAY, WA 98003 FIT RITE ALTERATIONS SUITE A-5 1320 SOUTH 324TH STREET FEDERAL WAY, WA 98003 BRAS SFIELD'S SUITE A-9 1320 SOUTH 324TH STREET FEDERAL WAY, WA 98003 ROSS 32075 PACIFIC HWY SOUTH FEDERAL WAY, WA 98003 HEAVEN SENT 1200 SOUTH 324TH STREET FEDERAL WAY, WA 98003 WEIGHT WATCHERS SUITE A-2 1320 SOUTH 324TH STREET FEDERAL WAY, WA 98003 PET JUNGLE SUITE A-7 1320 SOUTH 324TH STREET FEDERAL WAY, WA 98003 PJPOCKETS SUITE A-10 1320 SOUTH 324TH STREET FEDERAL WAY, WA 98003 FABRICLAND 32065 PACIFIC HWY SOUTH FEDERAL WAY, WA 98003 CENTURY CITY SHOE REPAIR TCI SUITE B-212 SUITE B-211 1414 SOUTH 324TH STREET 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 FEDERAL WAY, WA 98003 ART COLLECTOR'S GALLERY SUITE B-207 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 KANG'S GIFTS SUITE B-201 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 OLAN MILLS 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 KRONLUND CHIROPRATIC SUITE B-111 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 H & R BLOCK FARMERS INSURANCE COMMERCIAL CREDIT SUITE B-110 SNYDER AGENCY SUITE B-109 SUITE B-108 1414 SOUTH 324TH STREET 1414 SOUTH 324TH STREET 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 FEDERAL WAY, WA 98003 FEDERAL WAY, WA 98003 DEPT.. OF LICENSING SUITE B-105 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 AL'S AUTO SUPPLY SUITE Al 32411 PACIFIC HWY SOUTH FEDERAL WAY, WA 98003 PRO AUTO SOUND SUITE C 32411 PACIFIC HWY SOUTH FEDERAL WAY, WA 98003 ARTHUR MURRY DANCE SCHL KEY BANK SUITE B-102 32303 PACIFIC HWY SOUTH 1414 SOUTH 324TH STREET FEDERAL WAY, WA 98003 FEDERAL WAY, WA 98003 THE FINISHING TOUCH SUITE A2 32411 PACIFIC HWY SOUTH FEDERAL WAY, WA 98003 VINCE'S SUITE E 32411 PACIFIC HWY SOUTH FEDERAL WAY, WA 98003 FITNESS OUTLET SUITE B 32411 PACIFIC HWY SOUTH FEDERAL WAY, WA 98003 SEA-TAC PONTIAC GMC 32427 PACIFIC HWY SOUTH FEDERAL WAY, WA 98003 PIZZA HUT FIRESTONE SHURGARD STORAGE 32521 PACIFIC HWY SOUTH 32529 PACIFIC HWY SOUTH 32615 PACIFIC HWY SOUTH FEDERAL WAY, WA 98003 FEDERAL WAY, WA 98003 FEDERAL WAY, WA 98003 N V = 2DO" "ov�'.000v�/ W_, C-MIRUI SRO RZEE. LDT 1 ic 305N. ROED � HITCAING5, INC. SEA 71 LE , VVA . ry Ln J, o D9-qF7 ad m0001W�� ELI 000j REVISION DATE 3 AN 14 1997 AFFIDAVIT OF DISTRIBUTION I r f i - i , 1 _ hereby declare, under penalty of perjury of the laws of the State of Washington, that a: M"'Notice of Application ❑ Notice of Action ❑ Notice of Application for Shoreline Management Permit ❑ Notice of Determination of Significance ❑ Notice of Determination of Non - Significance and Scoping Notice ❑ Notice of Environmental Determination of Non -Significance (SEPA) ❑ Notice of Environmental Mitigated Determination of Non -Significance (SEPA) ❑ Notice of Proposed Land Use Action ❑ Notice of Public Land Use Hearing ❑ Notice of Planning Commission Public Hearing ❑ Shoreline Management Permit ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Land Use Application ❑ Other was mai ed/faxe osted to/at each of following addresses (see attached) on - 1997. Project Name 44 File Numbers) Signature r Date AFFiDAvr.FRM REVISED 1/8/97 nii99/47 WF.n 17:08 FAX 2066614129 CITY OF FEDERAL WAY ig001 CITY OF (206) 661-4000 33530 1ST WAY SOUTH FEDERAL WAY, WA 98MI-6210 Adayor Council mannbaY3 Mahlon'Skip` Priest lack Davey HQpc F-ldcr CFry Monagtr Mary Gates Kenneth E. Nybcrg kon Gimz michdel Park Phil Watkins FAX TRANSMITTAL MEM(.3-101A TO., DATE. Si FAX #: l - ;P_ -2 -NUUMER O)FSAGES (Including Memo Sheet) • FROM: ~ OFFICE OF: CI 1�0 F � (206) 661- 33530 1ST WAY SOUTH FEDERAL WAY, WA 98003-6210 6210 NOTICE OF LAND USE APPLICATION The City of Federal Way Community Development Services has received a land use application to abandon an existing interim storm water detention pond and facilities, and fill and grade lot #14, Plat of Century, for future development. The site is located at at 1401 South 312th Street in Federal Way. The file numbers are LSM96-0003, UPR96-0060, and SEP96-0039. The following documents were submitted in conjunction with the application: Environmental Checklist, Geotechnical Engineering Study, Technical Information Report, Topographic Survey, grading and drainage plan, and a plat certificate for lot 14, Plat of Century. This application will be reviewed for compliance with Federal Way City Code:Article VI, Process 1, Division 7, Land modifications, and the State Environmental Policy Act (SEPA). The application was deemed complete on January 14, 1997. Any person or public agency expressing an interest in this matter is invited to submit written comments to Greg Moore, Development Services Director, on or before February 10, 1997. The official file is available for review at Federal Way City Hall, Community Development Services, 33530 First Way South, Federal Way, WA 98003. Written comments may also be submitted to this address. For further information on the above project, contact Deb Barker, Associate Planner, at (206) 661-4103. Date of Publication in the Federal Way News: January 25,1997 PUBNOW.= CITY OF FIN00or 33530 1ST WAY SOUTH The City of Federal Way Community Development Services has received a land use application to abandon an existing interim storm water detention pond and facilities, and fill and grade lot #14, Plat of Century for future development. The site is located at at 1401 South 312th Street in Federal Way. The file numbers are LSM 96-0003, UPR 96-0060 and SEP 96- 0039. The following documents were submitted in conjunction with the application: Environmental Checklist, Geotechnical Engineering Study, Technical Information Report, Topographic Survey, Grading and drainage plan and a plat certificate for lot 14, Plat of Century. This application will be reviewed for compliance with Federal Way City Code (FWCC) Article VI - Process I, FWCC Division 7 - Land modifications and the State Environmental Policy Act (SEPA). The application was deemed complete on January 14, 1997. Any person or public agency expressing an interest in this matter is invited to submit written comments to Greg Moore, Development Services Director, Qn or befoLe Febniary 10,1927. The official file is available for review at Federal Way City Hall, Community Development Services, 33530 1st Way South, Federal Way, WA 98003. Written comments may also be submitted to this address. For further information on the above project, contact Deb Barker, Associate Planner at (206) 661-4103. (Date of Publication in the Federal Way News: January 25, 1997) CITY OF y (206)-0 33530 1ST WAY SOUTH FEDERAL WAY, WA 3800003-6216210 January 15, 1997 Mr. Hal Hagenson Bush, Roed & Hitchings, Inc. 2009 Minor Avenue East Seattle, WA 98102 RE: NOTICE OF COMPLETE APPLICATION PLAT OF CENTURY, STORM FACILITY LAND SURFACE MODIFICATION 1401 South 324th Street — File Nos: LSM96-0003, SEP96-0039, UPR96-0060 Dear Mr. Hagenson: The Department of Community Development Services received the following information you submitted on December 16, 1996, and January 13, 1997: • Topographic Survey prepared by Bush Roed and Hitchings, October 1996. ■ Environmental SEPA checklist, December 5, 1996. • Geotechnicial Engineering Study prepared by Geo Group NW, Inc, November 25, 1996. • Plat certificates for lot 14 prepared by Stewart Title, December 4, 1996. • TIR by Bush Roed and Hitchings, December 11, 1996. • Grading & drainage plan prepared by Bush Roed and ltchings, December 5, 1996. • Correspondence from Hal Hagenson to the City of Federal Way, December 6, 1996. • 400 foot radius map. The information is for the proposal to abandon an existing interim storm water detention pond and facilities, and fill and grade the lot for future development at 1401 South 312th Street, in Federal Way. Pursuant to the requirements under the state mandated regulatory reform requirements, the city has 28 days to determine whether an application is complete. Mr. Hal Hagenson January 15, 1997 Page 2 Please consider this letter as a Letter of Completeness. Pursuant to the requirements under the state mandated regulatory reform requirements, the application is deemed complete as of January 14, 1997, based on the submittal requirements for State Environmental Policy Act (SEPA) and Process I review. A 120 day time line for reviewing the project has started as of this date. The city has 120 days from the date that an application is deemed complete to take action on the application. However, the 120 day time line can be stopped at any time that the city requests additional information. You will be informed of the status of the 120 day time line when you are notified in writing that additional information is needed. Having met the submittal requirements, your application is now ready for processing. Therefore, pursuant to the requirements under the state mandated regulatory reform requirements, a Notice of Application will be published in the Federal Way News within 14 days, and other public notice will be given based on city procedures. The Department of Community Development Services has responsibility to notify other agencies who may have jurisdiction over your development project or an interest in it. If you should have any questions regarding this letter or your development project, please feel free to call me at 661-4103. Sincerely, Deb Barker Associate Planner c: Julie Venn, Engineering Plans Reviewer Ken Comwall, Building Plans Examiner Greg Brozek, King County Fire District Mary Cossette, Lakehaven Utility District File SPR%c tmy\v pleteltr CITY OF FEDERAL WAY DEPARTMENT OF COMMUNITY DEVELOPMENT MEMORANDUM DATE: December 18, 1996 TO Community Development Review Committee (CDRC) Members Stephen Clifton, PW Development Services Manager Dick Mumma, Building Official Mary Cossette, Lakehaven Utility District Greg Brozek, Fire Marshal's Office, KC Fire District #39 FROM: Deb Barker, Associate Planner, 661-4103 PLEASE RESPOND BY: January 2, 199if FILE NUMBER: LSM 96-0003, SEP 96-0039 PROJECT NAME: Plat of Century storm facility revision proposal PROJECT ADDRESS: Lot 14, Plat of Century, 1401 S. 324th Street PROJECT DESCRIPTION: Proposal to abandon existing interim storm water detention pond and facilities, fill and grade the lot for future development. PROJECT CONTACT: Hal Hagenson, Bush Roed and Hitchings 2009 Minor Ave. East Seattle, WA 98102 (206) 323-4144 SEPA: Required with more than 400 cubic yards of grading. Please provide your SEPA related comments. NOTES: Preapplication meeting occurred on September 5, 1996. Please respond: Is the application complete? �„� ►'" � C E 1 V E D MASTF' ,1AND USE APPLICATION Ry J U L If DEPARTMENT OF CONDAUNTTY DEVELOPMENT BUSH, ROED b HITCIi1N63 INC. 33M tot Way sa,�s#tcd«.h way. WA "M G Date Q U �. APPLICATION NO. � � `'7 Agent Name of Applicant H AL H ki E,ERSo1J Owner r Address 2009 MINDR AVE.E- SEATFLF, WA. q$IDZ one (200- st3-4)4 Signature 511L\2t2Ete�►VA gbODS C2oio� 455-b5�4 OwnerNamelAddress C�11OR4 SQUAIZE As&cL. ❑od-n-4V AuE 1.1E Phone (Vd(fferentthan applkant) APPfRnX. Goo UkCi CFF Illt 10-jEKCTICu OF S3Z4— 4 IIWff'-99 Property Location �6]! Kroll PAGE r1210 1� -.� Zone • Legal Description - Project Description FACILITIE(. RU- AUD 6WE Lei- FOX FMN-E DEVEDPM LM. Parcel Number(s) I S ©O 50 - D I9 O IC I6 COWT4 ALSr- �DF-S Ai om Ef[_ LOT 14 OF TIME CEWT004 PLAT AS F-ELDRDED /M VDLOME 14, PAGES (A- r1Z . VELDRDS OF V-IUI. CaUUTH h W»06irA1. . A8AWDDW RISTIfJG. INMZK SMIN1WM DETF-KM6m -ft1D'AWD_' Type of Permit Required: SEPA Site Plan Review R (X Land Surface Modilica da Boundary Line Adjustment --- Binding Site Plan R Short Subdivision ' Subdivision R Shoreline R Variance R Conditional Use R Use - Process I R Use - Process II R Use - Process III R Quasi -Judicial Rezone R YarUnce R* Comp. Plan/Rezone R Annexation R Lot Line ElimbmUkd" RPre-Application Meeting Notice Sign Mailed Bnacd R a R R R a s R R R s R R R R R R R R R R R a R R R R R= AdAMMA.rux a = �a BUSH, ROED & HITCHINGS, INC. BRH Civil Engineers and Land Surveyors CEO December 6, 1996 Robert M. Roed, P.L.S., P.E. President Ronald G. Goldy, P.E. Senior Vice President Steven A. Hitcbings, P.L.S. Julie M. Pappa Vice President City of Federal Way - Public Works Hugh R. Johnston, P.L.S. 33530-1st Way South Project Managers Federal Way, WA 98003-6210 John E. Anderson, P.E. Brent D. Curnmings, P.E. Harold E. Hagenson, P.E. Re: PRE 96-0039 James V. Harrison Lot 14, Plat of Century Storm Facility Revision Proposal Jeffrey J. McManus, P.L.S. Darrel C. Nance, P.L.S. Dear Julie: John J. Weed, P.E. In your September 23, 1996 Memo, under the heading of Traffic, you requested that " a haul route plan for the proposed import of earth material shall be submitted to the Public Works Development Services Division for review and approval before issuance of a permit for Land Surface Modification. This requirement presents a problem. The owner anticipates that he will procure fill dirt from local construction projects where the contractor is looking for an approved "dump site". This strategy will hopefully save the owner significant cost since he will have more latitude to negotiate price as opposed to simply buying and importing material from a gravel pit or similar source. Implicit in this strategy is the distinct probability that the fill material may come from several different sources, none of which can presently be identified. The owner has deferred identifying potential fill sources until he has a permit in hand because any negotiation for a potential source would be dependent on the source excavation construction schedule, such that the owner could place himself in jeopardy of contractual non-performance should the permit be unobtainable for any reason. We respectfully request that this requirement be waived or modified to eliminate this problem. We'd be happy to discuss this with you in hopes that we can arrive at a mutually satisfactory solution. Sincerely, BUSH, ROED & HITCHINGS, INC. 4t), 404�� Hal Hagenson, P.E. Project Manager cc: Chris Leady Century Square Associates 2009 Minor Avenue East, Seattle, Washington 98102-3513 - Phone 206/323-4144; Fax 206/323-7135 1-800/935-0508 Internet: brhinc.com BUSH, ROED & HITCHINGS, INC. ®RH Civil Engineers and Land Surveyors CEO December 6, 1996 Robert M. Roed, P.L.S., P.E. President Ronald G. Goldy, P.E. Deb Barker Senior Vice President Steven A. Hitchings, P.L.S. City of Federal Way - Community Development Vice President 33530 - 1st Way South Hugh R. Johnston, P.L.S. Federal Way, WA 98003-6210 Project Managers Jolui E. Anderson, P.E. Brent D. Cunmiings, P.E. Re: PRE 96-0039 Harold E. Hagenson, P.E. Lot 14, Plat of Century Storm Facility Revision Proposal James V. Harrison Jeffrey J. McManus, P.L.S. Dear Ms. Barker: Darrell C. Name, P.L.S. John J. Weed, P.E. We would like to take this opportunity to respond to your letter of September 18, 1996, wherein you state " The city may approve the LSM if it complies with the criteria of FWCC section 22-1094(c) (below). The application should reflect how these criteria are met. 1) Except as allowed under this chapter, it will not alter or adversely affect streams, lakes, wetlands, or significant trees either on or off the subject property. 2) It will not violate any express policy of the city. 3) It meets at least one of the following criteria: a. It is necessary to correct an erosion of drainage problem on an undeveloped site. b. It is necessary to create new utility or access corridors. C. Other unusual circumstances exist which make it reasonable to permit land surface modification in advance of the issuance of a development permit, subdivision or short plat approval." Our responses are enumerated in kind. 1) The Land Surface Modification submittal includes a geotechnical engineering report, a phase one environmental audit, a stormwater technical information report (including a level one and level two downstream analysis) , a topographic survey and a SEPA checklist. These documents support the conclusion that the project will not alter or adversely affect streams, lakes or wetlands. The survey supports the conclusion that there are no significant trees on the subject property. 2) The proponent intends on complying with all applicable city codes and policies. It is our understanding that it is the intent of the land surface modification process to identify these codes and policies and to enforce compliance as a condition of the permit. Therefore, it would not violate any express policy of the city. 3) We assert that the proposed project meets both criteria a. and b. as follows: 2009 Minor Avenue East, Seattle, Washington 98102-3513 - Phone 206/323-4144; Fax 206/323-7135 1-800/935-0508 Internet: brhinc.com BUSH, ROED & HITCHINGS, INC. CITY OF FEDERAL WAY Deb Barker December 6, 1996 Page 2 The site is currently occupied by an interim detention pond. This pond was intended to mitigate the impacts generated by the Century Square development on the Highway 99 drainage system, until such time as the Highway 99 system could be adequately improved. The system was improved in the 1970's, but restriction plates were installed until a downstream detention facility could be built to buffer the impact of the increased flows on properties lying even farther downstream. The South 336th Street detention facility will accomplish this task. When construction is completed on the South 336th street regional detention facility, the restriction plates will be removed and the "interim" detention facility will no longer be necessary. Public works staff has indicated that the project should be completed by the end of this year. Consequently, the function of the current interim detention pond is redundant to the function of the new South 336th regional detention facility. In effect, tax lot 14 is being needlessly flooded by these "unusual circumstances" and we regard this as a "drainage problem on an undeveloped site." Sincerely, }/-401j Hal Hagenson, P.E. Project Manager cc: Chris Leady Century Square Associates. i BUSH, ROED & HITCHINGS, INC. BRH Civil Engineers and Land Surveyors CEO Robert M. Roed, P.L.S., P.E. December 10, 1996 President Ronald G. Goldy, P.E. Senior Vice President Greg Moore Steven A. Hitchings, P.L.S. City of Federal Way - Community Development Vice President 33530 - 1st Way South Hugh R.Johnston, P.L.S. Federal Wa WA 98003-6210 y� Project Managers John E. Anderson, P.E. Brent D. Cummings, P.E. Re: PRE 96-0039 Harold E. Hagenson, P.E. Lot 14, Plat of Century - Storm Facility Revision Proposal James V. Harrison Jeffrey J. McManus, P.L.S. Dear Mr. Moore: Darrell C. Nance, P.L.S. John J. Weed, P.E. We are preparing submittals for a Land Use Modification Permit on the subject property. The site is currently occupied by an interim detention pond. This pond was intended to mitigate the impacts generated by the Century Square development on the Highway 99 drainage system, until such time as the Highway 99 system could be adequately improved. The system was improved in the 1970's, but restriction plates were installed until a downstream detention facility could be built to buffer the impact of the increased flows on properties lying even farther downstream. The South 336th Street regional detention facility will accomplish this task. When construction is completed on the South 336th Street detention facility, the restriction plates will be removed and the "interim" detention facility will no longer be necessary. Public works staff has indicated that the project should be completed by the end of this year. A temporary easement was recited on the face of the Plat of Century to enable this interim detention function. We have included a copy of a current plat certificate (reference page 3, item 3). In her September 18, 1996 letter to me, Deb Barker required that "the applicant shall submit a letter to Greg Moore,.... requesting the easement be eliminated." We respectfully request that the easement be eliminated and we ask that you process this in the appropriate manner. Please feel free to call should you require additional information from our office. Thank you for your time and consideration. Sincerely, BUSH, ROED & HITCHINGS, INC. Hal Hagenson, P.E. Project Manager HEH/tls cc: Chris Leady Century Square Associates 2009 Minor Avenue East, Seattle, Washington 98102-3513 - Phone 206/323-4144; Fax 206/323-7135 1-800/935-0508 Internet: brhinc.com 121 09I,��WAdi TITLE COMPANY F WASHINGTON, INC. 1201 Third Avenue, Suite 3800 Seattle, Washington 98101 Senior Title Officer, Julie Goodman Title Officer, Tara M. Doherty Unit No. 8 FAX Number 206-343-8403 Telephone Number 206-343-1328 Bush, Roed and Hitchings, Inc. Order No. 305078 2009 Minor Avenue East Your Ref. 94188-OH Seattle, Washington 98102 CERTIFICATE FOR Attention: Steve Hitchings FILING PROPOSED PLAT PLAT CERTIFICATE SCHEDULE A GENTLEMEN: In the matter of the plat submitted for your approval, this Company has examined the records of the County Auditor and County Clerk of King County, Washington, and the records of the Clerk of the United States Courts holding terms in said County, and from such examination hereby certifies that according to said records the title to the following described land: Lot 14, Century, according to the plat thereof recorded in Volume 104 of Plats, pages 68 through 72, inclusive, in King County, Washington. IS VESTED IN: S. MICHAEL RODGERS and MARCIA RODGERS, husband and wife and ALLAN M. DEUTSCH and BETTI M. DEUTSCH, husband and wife; and CHRISTOPHER C. LEADY and PENELOPE LEADY, husband and wife as community property SUBJECT TO THE FOLLOWING EXCEPTIONS: As on Schedule B, attached hereto. CHARGE: $200.00 TAX: 16.40 TOTAL CHARGE: $216.40 RECORDS EXAMINED TO: December 4, 1996 at 8:00 a.m. STEWART TITLE COMPANY OF WASHINGTON, INC. Julie Goodman Senior Title Officer Unit No. 8 PAGE 01 125 o1b, 1,0%T 4I4500ARANTY COMPANY PAGE 02 PLAT CERTIFICATE Schedule B Order No. 305078 GENERAL EXCEPTIONS: 1. Rights of claims of parties in possession not shown by the public records. 2. Public or private easements, or claims of easements, not shown by the public record. 3. Encroachments, overlaps, boundary line disputes, or other matters which would be disclosed by an accurate survey or inspection of the premises. 4. Any lien, or right to a lien, for services, labor or material heretofore or hereafter furnished, imposed by law and not shown by the public records, or Liens under the Workmen's Compensation Act not shown by the public records. 5. Any title or rights asserted by anyone including but not limited to persons, corporations, governments or other entities, to tide lands, or lands comprising the shores or bottoms of navigable rivers, lakes, bays, ocean or sound, or lands beyond the line of the harbor lines as established or changed by the United States Government. 6. (a) Unpatented mining claims; (b) reservations or exceptions in patents or in Acts authorizing the issuance thereof; (c) water rights, claims or title to water. 7. Any service, installation, connection, maintenance, capacity, or construction charges for sewer, water, electricity or garbage removal. B. General taxes not now payable or matters relating to special assessments and special levies, if any, preceding the same becoming a lien. 9. Indian tribal codes or regulations, Indian treaty or aboriginal rights, including, but not limited to, easements or equitable servitudes. B. SPECIAL EXCEPTIONS: As on Schedule B, attached. 12/09/96 11 :55AM Order No, 305078 PAGE 03 PLAT CERTIFICATE SCHEDULE B Page 2 SPECIAL EXCEPTIONS: 1. EASEMENT AND THE TERMS AND CONDITIONS THEREOF, INCLUDING, BUT NOT LIMITED TO, THE FOLLOWING: KNEE-1TL]fill] U.S.A. CONDEMNED IN CAUSE NUMBER: 269, 272, 535 and 685 UNITED STATES DISTRICT COURT HOLDING TERMS AT SEATTLE PURPOSE: Electric transmission lines AREA AFFECTED: Portion of said premises and other property Copies of the decrees entered in said cases were recorded under Recording Numbers 3128470, 3128474, 3253846 and 3308820, respectively. 2. EASEMENT AND THE TERMS AND CONDITIONS REFERENCED THEREIN, INCLUDING, BUT NOT LIMITED TO, THE FOLLOWING: GRANTEE: City of Tacoma PURPOSE: To construct, reconstruct, install, operate, inspect and maintain a water transmission pipeline, or pipelines, and appurtenant equipment AREA AFFECTED: Portion of said premises and other property RECORDED: RECORDING NUMBER: February 27, 1974 7402270262 3. EASEMENT PROVISION CONTAINED IN SAID PLAT AS FOLLOWS: Lot 14 is subject to a temporary storm drainage easement, said easement to expire when an adequate drainage pipe system is constructed in Pacific Highway South eliminating the requirement for a retention basin upon this lot. (continued) 12/09/96 11:56AM Order No,'�305078 PLAT CERTIFICATE SCHEDULE B Page 3 4. NOTES FROM THE FACE OF THE PLAT: There shall be no direct vehicular access to and from South 320th Street to and from Lot 13, and Lot 4, except for common access with Lot 11. Lot 2 is restricted to one direct access point on South 320th Street. Lot 11 is restricted to the maximum of two direct vehicular access points on South 320th Street. (One in common with Lots 3 and 4). There shall be no direct vehicular access to and from Pacific Highway South to and from Lots 15 and 16. Direct vehicular access to and from Pacific Highway South to Lots 10, 11 and 12 is restricted to the maximum of four access points. Two of these access points are reserved, one each for Lots 10 and There shall be no direct vehicular access to and from South 320th Street, to and from Lot 1, except for the westerly 10.00 feet, provided that said access complies with King County standards. Prior to issuance of building permits on any of the lots shown on the subdivision, a site plan must be submitted and approved by the appropriate agency (currently King County Building and Land Development Division) and in accordance with Federal Way Community Plan Policy FWF1-9. a Future installation of utilities to serve the subdivision shall be underground. 5. AGREEMENT AND THE TERMS AND CONDITIONS THEREOF: 12. BY AND BETWEEN: Lakehaven Sewer District and Hanover Management, Inc. DATED: December 15, 1977 RECORDED: December 28, 1977 RECORDING NUMBER: 7712280844 REGARDING: Construction of sewage facilities and costs relating to same 6. Right of the public to make necessary slopes for cuts or fills upon said premises in the reasonable original grading of streets, avenues, alleys and roads, as dedicated in the plat. (continued) PAGE 04 12/09/96 11:57AM Order No305078 PLAT CERTIFICATE SCHEDULE B Page 4 7. DELINQUENT SECOND HALF GENERAL AND SPECIAL TAKES AND CHARGES: YEAR: TAX ACCOUNT NUMBER: LEVY CODE: CURRENT ASSESSED VALUE: 1996 150050-0140-03 1205 Land: $53,600.00 Improvements: $ 0.00 DELINQUENT SECOND HALF GENERAL TAXES: AMOUNT BILLED: AMOUNT PAID: AMOUNT DUE: $823.49 $411.74 $411.75 PLUS INTEREST DELINQUENT SECOND HALF SPECIAL DISTRICT: AMOUNT BILLED: AMOUNT PAID: AMOUNT DUE: 8. ASSESSMENT: AMOUNT: INTEREST: FROM: ANNUAL INSTALLMENTS: INSTALLMENTS PAID: INSTALLMENTS DELINQUENT: NEXT INSTALLMENT DELINQUENT: LEVIED BY: FOR: DISTRICT NUMBER: ACCOUNT NUMBER: $1.25 $ .63 $ .62 PLUS INTEREST $23,628.81 10.695Z March 23, 1983 20 11 0 March 23, 1997 Road Improvement District Road 74R 0265-150050-0140-03 END OF SCHEDULE B Title to this property was examined by: Anne Knight Any inquiries should be directed to one of the title officers set forth in Schedule A. AWK/tdt/9013K PAGE 05 CITY OFf` CITY HALL 33530 1 st Way South PO Box 9718 June 7, 2001 Chris Leady Century Square Associates 2000 124th Avenue NE Bellevue, WA 98005 RE: Permit #97-102696-000-00-CO; CENTURY #14 (GRADE) 1401 S 324th Street; Final Review Dear Mr. Leady: (253) 661-4000 Federal Way, WA 98063-9718 A final review of the above referenced project has been completed and all items listed on the May 13, 1998 Final Punch List have been properly addressed. The project is considered complete and the two-year maintenance period has expired. Attached is a Full Release of Bond Notice releasing $36,000.00, the remaining thirty percent (30%) of the bond amount. The administrative cash deposit in the amount of $1,560.00 will also be refunded. A check will be sent to you shortly. We appreciate your cooperation in the completion of this development. If you have any questions, please contact me at (253) 661-4196. Sincere , Jim Femlmg Development Services Manager H.-iff enclosure cc: Project File Day File 1:\csdc\docs\save\6717355 8.doc Y FULL RELEASE OF BOND # U2 9711 Z42.. TERMINATION OF LICENSE The undersigned hereby acknowledges that the two (2) year maintenance period has expired, that the work or improvements covered by the Agreement and Performance/ Maintenance Bond for Century Square Storm Facility Revision, Permit #BLD97-0443, have been completed to the City's satisfaction and that the City is not aware of any defect in workmanship or materials. Accordingly, the undersigned hereby releases the sum of Thirty Six Thousan and no/100 Dollars ($36,000.00). The undersigned further releases all right, title and interest granted to the undersigned by reason of a certain License Agreement recorded under King County Recording No. ("License Agreement") and acknowledges that all obligations and rights contained in the License Agreement are hereby terminated. DATED this `7day of _�•rtiif {` CITY OF FEDERAL WAY By.(�L,L,- (Narne", Title) 3 �1