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98-100676 COO/CITY OF G (253) _• 33530 1ST WAY SOUTH FEDERAL WAY,WA 8 03-622110 April 13, 1998 Marwan Salloum City of Federal Way 33530 1st Way South Federal Way, WA 98003 SUBJECT: ENVIRONMENTAL THRESHOLD DETERMINATION Application No: SEP98-0009 Dear Mr. Salloum: , 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 I5-day comment period is required by the SEPA Rules (WAC 197-11-340). A notice inviting comments was published in the Federal Way News on April 13, 1998. At the end of the comment period, the department will determine if the DNS should be withdrawn, modified, or issued as proposed.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 Services. Environmental Threshold Determination April 8, 1998 Page 2 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 Scott Williams at 661-4119. Sincerely, c4t-S-T Gregory D. Moore, AICP Director of Community Development Services DNSI_TR.FRM REVISED t 1/7/96 CITY OF • (253)661-4000 Flr) 33530 1ST WAY SOUTH FEDERAL WAY,WA 98003-6210 ENVIRONMENTAL DETERMINATION OF NON-SIGNIFICANCE APPLICATION NUMBER: SEP98-0009 DESCRIPTION OF PROPOSAL: Construct an 11.3 acre-foot storm drainage pond on a 2.5 acre site. PROPONENT: City of Federal Way LOCATION: South of SW 340th Street, between 37th Avenue SW and 39th Avenue SW LEAD AGENCY: City of Federal Way The responsible Official of the City of Federal Way hereby makes the following decision based upon impacts identified in the environmental checklist, the Federal Way Comprehensive Plan, the "Final Staff Evaluation for Environmental Checklist; Application No. SEP98-0009" 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 April 28, 1998. 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. CONTACT PERSON: Scott Williams, Contract Planner PHONE: (253) 661-4000 RESPONSIBLE OFFICIAL: Gregory D. Moore, AICP POSITION/TITLE: Director of Community Development Services ADDRESS: 33530 First Way South, Federal Way, WA 98003 DATE ISSUED: April 13, 1998 SIGNATURE:CA9Otabcen 6/PJC�� " ( 1 .l1LtitQ/' NOTICE OF ENVIRONMENTAL DETERMINATION OF NON-SIGNIFICANCE FEDERAL WAY, WASHINGTON APPLICATION No: SEP98-0009 The City of Federal Way has determined that the following project does not have a probable significant adverse impact on the environment. An Environment 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: Construct an 11.3 acre-foot storm drainage detention pond on a 2.5 acre parcel. APPLICANT: City of Federal Way LOCATION: South of SW 340th Street, between 37th Avenue SW and 39th Avenue SW Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development Services, Federal Way City Hall, 33530 First Way South, Federal Way, WA, 98003, Phone: (253) 661-4000. This DNS is issued under WAC 197-11-340(2). Comments must be submitted by 5:00 p.m. on April 28, 1998. Unless modified by the city, this determination will become final following the comment deadline. Any person aggrieved by the city's determination may file an appeal with the city within 14 days of the above comment deadline. PUBLISHED IN THE TACOMA NEWS TRIBUNE ON April 13, 1998. DNSNOT.FRM REVISED 4/9/98 , CITY OF FEDERAL WAY DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES FINAL STAFF EVALUATION FOR ENVIRONMENTAL CHECKLIST S.W. 340TH STREET DETENTION POND Federal Way File No: SEP98-0009 I. SUMMARY OF PROPOSED ACTION The proposed action is to construct an 11.3 acre-foot storm drainage detention pond on a 2.5 acre parcel. The purpose of the proposal is to reduce the magnitude and frequency of flooding on 35th Avenue SW and vicinity. The pond would serve an area of 124.4- acres. The proposal also includes construction of an underground storm drainage pipe in SW 342nd Street and replacement of an exisiting pipe in 35th Avenue SW. II. GENERAL INFORMATION Project Name: SW 340th Street Detention Pond Applicant: Marwan Salloum City of Federal Way 33530 1st Way S Federal Way, WA 98003 Location: The project site is located at 34800 21st Avenue SW; in the southeast quarter of Section 24, Township 21 North, Range 4 East. Zoning: RS 7.2, Single Family Residential Comprehensive Plan Designation: Single Family - High Density The following information was submitted as part of the application. 1. SEPA Checklist, dated received March 4, 1998. 2. Wetland/Stream determination prepared by Sheldon & Associates, Inc. dated received March 4, 1998. 3. Phase 1 Environmental Site. Assessment, prepared by Landau Associates, Inc., Staff Evaluation S.W. 340th Street Detention Pond Page 2 dated received March 4, 1998. 4. Geotechnical Report, prepared by Landau Associates, Inc., dated received March 4, 1998. NOTE: Technical reports and attachments referenced above 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 Scott Williams, 33530 First Way South, Federal Way, Washington, 98003, Phone: (253) 661-4119. III. REVIEW PROCESS The proposed action is subject to State Environmental Act (SEPA) review because it does not meet the exemptions contained in Sections 18-73 and 18-74 of the Federal Way City Code. IV. BACKGROUND/PROPOSAL The proposed project is listed in Comprehensive Plan as a programmed capital improvement. V. REVIEW OF THE ENVIRONMENTAL CHECKLIST The following lists the elements contained within the Environmental Checklist submitted for the proposed code amendment. The numbers in the staff evaluation correspond to the numbers in the Environmental Checklist. If staff concurs with the applicant's response, this is so stated. If the response to a particular item in the checklist is found to be inadequate or clarification is needed, there is additional staff comment and evaluation. A. BACKGROUND: 1-12 -- Concur with checklist. Staff Evaluation S.W. 340th Street Detention Pond Page 3 B. ENVIRONMENTAL ELEMENTS: 1. Earth: a-g -- Concur with checklist. h -- An erosion control plan will be prepared and implemented for the project, as required by the Federal Way City Code and the Public Works Director. This will be sufficient to mitigate impacts. 2. Air: a -- The proposed project would have short term impacts on air quality. Short term emissions could result from suspended dust created during construction activities on the site and from exhaust emissions of construction vehicles. With mitigation measures proposed by the applicant, short-term impacts are not expected to be significant. Please refer to item 2 (c), below. b -- Concur with checklist. c -- Concur with checklist. 3. Water: a (1)-(6) -- Concur with checklist. b (1) and (2) -- Concur with checklist. c (1) and (2) -- Concur with checklist. d -- Concur with checklist. The proposed project would result in a reduction of existing conditions with respect to surface water runoff in the area. 4. Plants: a -- Concur with checklist. b -- Concur with checklist. c-d -- Concur with checklist. Staff Evaluation S.W. 340th Street Detention Pond Page 4 5. Animals: a-d -- Concur with checklist. 6. Energy and Natural Resources: a-c -- Concur with checklist. 7. Environmental Health: a -- Concur with checklist. During the Phase I assessment prepared for the site, some potentially hazardous materials were found on the site. Disturbance of these materials during construction could result in a release to the environment. a (1) -- Concur with checklist. a (2) -- Concur with checklist. In addition, the exisitng material identified on the site will be identified prior to beginning construction. If applicable, hazardous materials would be removed in accordance with Department of Ecology rules. This will be sufficient to mitigate impacts. b (1) through (3) -- Concur with checklist. 8. Land and Shoreline Use: a-I -- Concur with checklist 9. Housing: a-c -- Concur with checklist. 10. Aesthetics: a-c -- Concur with checklist. 11. Light and Glare: a-d -- Concur with checklist. 12. Recreation: Staff Evaluation S.W. 340th Street Detention Pond Page 5 a-c -- Concur with checklist. 13. Historic and Cultural Preservation: a-c -- Concur with checklist. 14. Transportation: a-f -- Concur with checklist. 15. Public Services: a-b -- Concur with checklist. 16. Utilities: a-b -- Concur with checklist. V. CONCLUSION The proposal can be found to not have a probable significant adverse impact on the environment pursuant to a Determination of Nonsignificance (DNS). This DNS is based on impacts identified within the environmental checklist, attachments, and the above '`Final Staff Evaluation for Environmental Checklist Application No. SEP98-0009", and is supported by plans, policies, and regulations formally adopted by 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 proposal to determine the environmental significance or non-significance of the proposal. Prepared by: Scott Williams, Contract Planner Date: April 8, 1998 L\SCOTTW\S EP9809.DOC AFFIDAVIT OF DISTRIBUTION C-1)tLi-1.411 hereby declare, under penalty of perjury of the laws of the State of Washington, that a: o Notice of Application ❑ Notice of Proposed Land Use Action o Notice of Action ❑ Notice of Public Land Use o Notice of Application for Hearing Shoreline Management Permit ❑ Notice of Planning ❑ Notice of Determination of Commission Public Hearing Significance ❑ Shoreline Management Permit ❑ Notice of Determination of Non- Significance and ❑ Notice of Public Hearing Scoping Notice before the Hearing Examiner ❑ Notice of Environmental ❑ Notice of Land Use Determination of Non- Application Significance (SEPA) ❑ Notice of Environmental 0 Other Mitigated Determination of Non-Significance (SEPA) was (gia/fax�ed potted to/at each of following addresses l cf5gear on 1 l° -/. , 1998 . Project Name 9,t) b 57- De �7-7-)div nA/i File Number(s) -L�'-7- / p �00�1 Signature_ Date 174/W AFFIDAVI.FRM/ // REVISED 4/7/98 • FEMA US ARMY CORPS/ENGINEERS JOE HENRY REGION 10 NTH DIV ATTN REGULATORY BRANCH NATURAL RESOURCES CVN SVC 130-228TH ST SW PO BOX 3755 935 POWELL AVE SW BOTHELL WA 98021-9796 SEATTLE WA 98124 RENTON WA 98055 EPA DEPT OF ECOLOGY OFFICE OF ARCHAEOLOGY& ENVIRON RVIEW SECT MD-126 ENVIRON RVIEW SECT HISTORIC PRESERVATION 1200 -6TH AVE PO BOX 47703 PO BOX 48343 SEATTLE WA 98101 OLYMPIA WA 98504-7703 OLYMPIA WA 98504-8343 J FISH&WILDLIFE SERVICE WSDOT DNR ECOLOGICAL SRV DIVISION ENVIRONMENTAL DEPT SEPA CENTER 3704 GRIFFIN LN SE STE 102 PO BOX 47300 PO BOX 47015 OLYMPIA WA 98501 OLYMPIA WA 98504-7300 OLYMPIA WA 98504-7015 DNR - FOREST RESOURCE DIV DEPT OF HEALTH PUGET SOUND AIR NATURAL HERITAGE PROGRAM AIRDUSTRIAL CENTER BLDG 2 POLLUTION CNTRL AGENCY PO BOX 47016 PO BOX 47820 110 UNION ST STE 500 OLYMPIA WA 98504-7016 OLYMPIA WA 98504-7820 SEATTLE WA 98101-2038 SEPA RESPONSIBLE OFFICIAL SEPA RESPONSIBLE OFFICIAL PS REGIONAL COUNCIL KC WATER POLLUTION CTR DIV KC TRANSIT CTR DIV GROWTH MANAGEMENT DEPT ENV PLAN & REAL EST M/S 120 ENV PLAN &REAL EST M/S 122 1011 WESTERN AVE #500 821 SECOND AVE 821 SECOND AVE SEATTLE WA 98104-1040 SEATTLE WA 98104 SEATTLE WA 98104 PORT OF TACOMA MARK CAREY ENVIRONMENTAL DEPT PORT OF SEATTLE LAND USE SVC - KCDDES PO BOX 1837 PO BOX 1209 3600- 136TH PL SE TACOMA WA 98401-1837 SEATTLE WA 98111 BELLEVUE WA 98006-1400 KING CO PARKS DIVISION KING CO DEPT OF PUBLIC WKS PROPERTY MANAGEMENT KC BOUNDARY REVIEW BOARD SOLID WASTE DIVISION 2040- 84TH ST SE 810 THIRD AVE STE 608 400 YESLER WY #600 MERCER ISLAND WA 98040 SEATTLE WA 98104-1693 SEATTLE WA 98104-2637 SEATTLE/KING COUNTY TRANSPORTATION PLAN SECT KING CO ROADS DIVISION DEPT OF PUBLIC HEALTH 976 KING CO ADMIN BLDG COUNTY ROADS ENGINEER 1404 CENTRAL AVE S STE 101 500 FOURTH AVE 500 FOURTH AVE RM 900 KENT WA 98032 SEATTLE WA 98104 SEATTLE WA 98104 GERI WALKER GEO INFO SPEC - . FEDERAL WAY FEDERAL WAY SCHOOL DIST LAKEHAVEN UTILITY DIST FIRE DISTRICT#39 31405 - 18TH AVE S PO BOX 4249 31617 - 1ST AVE S FEDERAL WAY WA 98003 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 • PIERCE CO PLNG& LAND SVCS PIERCE CO PLNG&LAND SVC RESOURCE MANAGEMENT DEVELOPMENT ENGINEER AUBURN SCHOOL DISTRICT 2401 S 35TH ST 2401 S 35TH ST 915 FOURTH NE ACOMA WA 98409-7460 TACOMA WA 98409-7460 !' AUBURN WA 98002 CITY CLERK PUBLIC WORKS DIRECTOR PLANNING&CD DEPT PACIFIC CITY HALL ALGONA CITY HALL CITY OF AUBURN 100 THIRD AVE SE 402 WARDE 25 W MAIN PACIFIC WA 98047 ALGONA WA 98001 AUBURN WA 98001 KENT CITY HALL CITY OF TACOMA - BLUS PLANNING DEPARTMENT LAND USE ADMINISTRATOR TOWN OF MILTON 220 FOURTH AVE S 747 MARKET ST RM 345 1000 LAUREL KENT WA 98032 TACOMA WA 98402-3769 MILTON WA 98354 CITY OF BURIEN CITY OF DES MOINES CITY OF NORMANDY PARK CITY HALL 21650 11TH S 801 SW 174TH ST 415 SW 150TH ST DES MOINES WA 98188 NORMANDY PARK WA 98166 BURIEN WA 98166-1957 JERRY PRIOR OFFICE MANAGER PAT PROUSE PUGET POWER WASHINGTON NATURAL GAS US WEST PO BOX 97034 1400 W MAIN ST 450 - 110TH NE RM 409 BELLEVUE WA 98009 AUBURN WA 98001-5201 BELLEVUE WA 98004 KATHY LARSON BONNEVILLE POWER ADMIN VICTOR GONZALES PUGET POWER OFFICE OF ENVIRONMENT - AJ MORNING NEWS TRIBUNE 2020 S 320TH ST BLDG A STE M 905 NE 11TH AVE 32050 - 23RD S FEDERAL WAY WA 98003 PORTLAND OR 97232 FEDERAL WAY WA 98003 JACK HOPKINS NANCY BARTLEY SEAN MCCARTHY SEATTLE PI SEATTLE TIMES FEDERAL WAY NEWS 101 ELLIOTT AVE W PO BOX 70 533 S 336TH ST STE C SEATTLE WA 98121 SEATTLE WA 98111 FEDERAL WAY WA 98003 JOHN KIM KOREA POST WRITING RESOURCES WA ENVIRON COUNCIL 1804 S 324TH PL PO BOX 555 1100 SECOND AVE STE 102 FEDERAL WAY WA 98003 EDMONDS WA 98020 SEATTLE WA 98101 FEDERAL WAY MARK FREELAND DIRECTOR OF FACILITIES CHAMBER OF COMMERCE WETLANDS OF WEST HYLEBOS GROUP HEALTH COOPERATIVE PO BOX 3440 5150 SW 326TH PL 521 WALL ST FEDERAL WAY WA 98063 FEDERAL WAY WA 98023 SEATTLE WA 98121 SEATTLE MASTER BLDRS DIR - LOCAL GOV'T AFFAIRS WATER DISTRICT#54 HIGHLINE WATER DISTRICT 2155 - 112TH AVE NE #100 922 S 219TH ST PO BOX 3867 BELLEVUE WA 98004 DES MOINES WA 98198-6392 KENT WA 98032-0367 MIDWAY SEWER DISTRICT WATER DISTRICT#111 COVINGTON WATER DISTRICT PO BOX 3487 27224 - 144TH AVE SE 18631 SE 300TH PL KENT WA 98032 KENT WA 98042-9058 KENT WA 98042-9208 SO KING COUNTY TERRY LUKENS REG WATER AUTHORITY BELLEVUE- COUNCIL OFFICE PIERCE COUNTY HEALTH DEPT 13335 SE 248TH PL PO BOX 90012 3629 S "D" ST KENT WA 98042 BELLEVUE WA 98009-9012 TACOMA WA 98408 PIERCE COUNTY BOUNDARY RODGER ANDERSON LEAGUE OF WOMEN VOTERS REVIEW BOARD SEA/KING CO ASSOC/REALTORS OF SOUTH KING COUNTY 2401 S 35TH ST 12015 - 115TH AVE NE STE 295 800 SW 152ND TACOMA WA 98409 KIRKLAND WA 98034 SEATTLE WA 98166 FEDERAL WAY HERB POLLINGER WOMEN'S NETWORK FW COMMUNITY COUNCIL KINGSGROVE HOA PO BOX 3064 PO BOX 3684 2613 S 379TH PL FEDERAL WAY WA 98003 FEDERAL WAY WA 98063 FEDERAL WAY WA 98003 TWIN LAKES HOA BROOKLAKE COMM CENTER CRESTVIEW SHORECLUB ASSN 3420 SW 320TH ST #28 726 S 356TH 4817 SW 310TH FEDERAL WAY WA 98023 FEDERAL WAY WA 98023 FEDERAL WAY WA 98023 MHACC WILLIAM HICKS MIRROR LK RESIDENTS ASSN NORTH LAKE COMM CLUB 29219 - 7TH PL S 525 SW 312TH ST 33223 - 38TH AVE S FEDERAL WAY WA 98003 FEDERAL WAY WA 98023 AUBURN WA 98001 WEST GREEN CONDO ASSN REDONDO COMMUNITY CLUB STEEL LK RESIDENTS ASSN 432 S 321ST PL PO BOX 5118 2329 S 304TH ST FEDERAL WAY WA 98003 REDONDO WA 98054 FEDERAL WAY WA 98003 MICHAEL FELDMAN WESTRIDGE HOA AVIATION PLANNING - SEATAC CITY OF SEATAC 1067 SW 325TH CT PO BOX 68727 17900 INTL BLVD STE 401 FEDERAL WAY WA 98023 SEATTLE WA 98168-0727 SEATAC WA 98188 JOE ELTRICH CRAIG GIBSON TACOMA WATER DIVISION TACOMA PUBLIC UTILITIES f PO BOX 11007 PO BOX 11007 TACOMA WA 98411 TACOMA WA 98411-0007 e • AFFIDAVIT OF DISTRIBUTION • to(1�..c( (-A-)' "(�`� Ihereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Application ❑ Notice of Proposed Land Use Action ❑ Notice of Action 0 Notice of Public Land Use Hearing ❑ Notice of Application for Shoreline 0 Notice of Planning Commission Public Management Permit Hearing ❑ Notice of Determination of Significance 0 Shoreline Management Permit ❑ Notice of Determination of Non- 0 Notice of Public Hearing before the Significance and Scoping Notice Hearing Examiner Notice of Environmental Determination 0 Notice of Land Use Application of Non-Significance(SEPA) ❑ Notice of Environmental Mitigated ❑ Other Determination of Non-Significance (SEPA) was mailed/faxed/posted to/at each of following addresses (see attached) on 1998. Project Name r,,,,ArvS cock Av„ w^vz e k' po,(1 File Number(s) GV 9 OOo1 Signature ` .tt) Date , AFFIDAVI.FRM REVISED I/8/98 • NOTICE OF ENVIRONMENTAL DETERMINATION OF NON-SIGNIFICANCE FEDERAL WAY, WASHINGTON APPLICATION NO: SEP98-0009 The City of Federal Way has determined that the following project does not have a probable significant adverse impact on the environment. An Environment 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: Construct an 11.3 acre-foot storm drainage detention pond on a 2.5 acre parcel. APPLICANT: City of Federal Way LOCATION: South of SW 340th Street, between 37th Avenue SW and 39th Avenue SW Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development Services, Federal Way City Hall, 33530 First Way South, Federal Way, WA, 98003, Phone: (253) 661-4000. This DNS is issued under WAC 197-11-340(2). Comments must be submitted by 5:00 p.m. on April 28, 1998. Unless modified by the city, this determination will become final following the comment deadline. Any person aggrieved by the city's determination may file an appeal with the city within 14 days of the above comment deadline. PUBLISHED IN THE TACOMA NEWS TRIBUNE ON April 13, 1998. DNSNOT.FRM REVISED 4/9/98 City Hall 33530 1st Way South Federal Way, Washington 98003 Federal Way Regional Library 34200 1st Way South Federal Way, Washington 98003 320th Branch Library 848 South 320th St Federal Way, Washington 98003 South of SW 340th Street, between 37th Ave. Sw and 39th Ave. SW Federal Way, Washington 98023 NOTICE OF ENVIRONMENTAL DETERMINATION OF NON-SIGNIFICANCE FEDERAL WAY, WASHINGTON APPLICATION NO: SEP98-0009 The City of Federal Way has determined that the following project does not have a probable significant adverse impact on the environment. An Environment 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: Construct an 11.3 acre-foot storm drainage detention pond on a 2.5 acre parcel. APPLICANT: City of Federal Way LOCATION: South of SW 340th Street, between 37th Avenue SW and 39th Avenue SW Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development Services, Federal Way City Hall, 33530 First Way South, Federal Way, WA, 98003, Phone: (253) 661-4000. This DNS is issued under WAC 197-11-340(2). Comments must be submitted by 5:00 p.m. on April 28, 1998. Unless modified by the city, this determination will become final following the comment deadline. Any person aggrieved by the city's determination may file an appeal with the city within 14 days of the above comment deadline. PUBLISHED IN THE TACOMA NEWS TRIBUNE ON April 13. 1998. DNSNOT.FRM REVISED 4/9/98 ir 232103 9003 921150 0080 921150 0390 RESIDENT .RESIDENT RESIDENT 3601 SW 336th St 3381136th PI SW 33822 38th PI SW Federal Way Wa 88023 Federal Way Wa 98023 Federal Way Wa 98023 821160 0540 921150 0320 921160 0640 RESIDENT RESIDENT RESIDENT 33828 37th Ave SW 3817 SW 339th St 3626 SW 338th PI Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 821160 0360 921160 0660 308900 0316 RESIDENT RESIDENT RESIDENT 33914 38th PI SW 3615 SW 339th PI 34020 Hoyt Rd SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 147330 0170 308900 0008 147330 0160 RESIDENT RESIDENT RESIDENT 34023 37th Ave SW 34021 35th Ave SW 34029 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 147330 0060 147330 0140 147330 0070 RESIDENT RESIDENT RESIDENT 34102 37th Ave SW 34109 37th Ave SW 34108 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 308900 0045 147330 0100 308900 0035 RESIDENT RESIDENT RESIDENT 34123 35th Ave SW 3606 SW 342nd Ct 3508 SW 342nd St Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 308900 0060 615100 0010 615100 0020 RESIDENT RESIDENT RESIDENT 3511 SW 342nd St 34207 38th PI SW 34216 38th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 615100 0120 615100 0090 638516 0030 RESIDENT RESIDENT RESIDENT 34210 38th PI SW 34226 38th PI SW 3606 SW 342nd Ct Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 442410 0010 615100 0040 109960 0060 RESIDENT RESIDENT RESIDENT 3502 SW 343rd St 34229 38th P1 SW 33712 35th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 636020 0046 RESIDENT 33854-35th Ave SW Federal Way Wa 98023 SC PA' 3400 Por41) - RxS-, -k �wL(S 921150 0040 308900 0045 147330 0180 ABNER ROBERT JR ADAMS RANDY K BAKER GERALD W;DOROTHY N 33814 35th P1 SW 16420 SE 18th St 34017 37th Ave SW Federal Way Wa 98023 Bellevue Wa 98007 Federal Way Wa 98023 147330 0040 921150 0120 638616 0040 BARNES THOMAS S;TERESA M BARREN LYDIA BARTOLOMUCCI RAYMOND V 34022 37th Ave SW 3616 SW 339th PI 3611 SW 342nd Ct Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 ; 921160 0720 954280 0530 921160 0660 • BLIOCHENKO VIKTOR;TAMARA BODEY DOREEN L BOLSTA ALLAN L 3507 SW 339th PI 3219 SW 338th St 3621 SW 339th PI Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 536020 0026 964280 0510 921150 0070 _ BOSLEY SNOW T BROWN STEPHEN J CARLSON CHARLES B 34124 35th Ave SW 33814 33rd PI SW 33805 35th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 88023 308900 0006 308900 0008 109960 0060 CARLSTROM ULUAN I CARLSTROM THOMAS L;S L CARPINITO JOHN M;VIRGINIA A 3411135th Ave SW PO Box 1766 3371133rd PI SW Federal Way Wa 98023 Gig Harbor Wa 98335 Federal Way Wa 98023 • 615100 0090 615100 0040 954280 0540 CASTLE VERNON GEORGE JR CHAN RICKY;CHOW JIM SUN CHANEZ FELIX D 5802 Frances Ave NE 1837 Sunny Heights Or 33716 33rd PI SW Tacoma Wa 98422 Los Angeles Ca 90065 Federal Way Wa 98023 147330 0130 638515 0070 858120 0460 CHRISTUWSEN RICHARD S 11;M COOPER KEITH O;UNDA R COSTA GRANT D 34115 37th Ave SW 34236 36th PI SW 3328 SW 340th P1 Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 921150 0500 536020 0005 109960 0030 COYNE LARRY CRAM ROBERT W DECELLES MARK D;UNA E 33835 37th Ave SW 3420 SW 344th St 33802 36th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 615100 0030 921150 0330 921160 0540 DELUCA CHRISTPOPHER L;MARCI OELZER RANDY D;ANAMARIA DIGNAM JAMES W;TERRIE L 34223 38th PI SW 3815 SW 339th St 3903 SW 336th PI Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 638516 0030 308900 0060 858120 0010 OIWAN SUDEEP;MEGNA DOWNEY DOUGLAS C SR ERHARDT LOREN J 3717 Braebum Or NE 21554 1st Ct S 3421 SW 340th P1 Tacoma Wa 98422 Seattle Wa 98198 Federal Way Wa 98023 SEP9 =:x--) 34P r_ P 0 NI D - v..,..av tGtae ( • • 147330 0060 308900 0316 232103 9003 FALUS THOMAS R FALUS THOMAS R FEDERAL WAY PUBLIC SCHOOLS 8479 Thunder Mountain Rd 34102 37th Ave SW 31406 18th Ave 8 Juneau Ak 99801 Federal Way Wa 98023 Federal Way Wa 98003 147330 0030 868120 0480 147330 0020 FINNEY ALFRED F;JACQUELINE FITZHUGH STUART W FOSS LYNN D 34016 37th Ave SW 3412 SW 340th PI 34010 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 921160 0130 921150 0700 308900 0026 FOSTER NORIKO FRAZIER JOHN L;NICKI L FREYBERG CLEO M 3624 SW 339th PI 3519 SW 339th PI 34029 35th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 536020 0006 873216 0300 109960 0010 FYLUNG E SCOTT GALANG JOHN KEVIN;CONCHmN GARLINGTON PAMELA 3400 SW 344th St 3150 SW 339th St 33818 35th Ave SW- Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 921150 0030 954280 0550 147330 0070 GARNAND DON S;KAREN L GILBERT DAVID W GOGOUN REBECCA 33820 35th P1 SW 33708 33rd P1 SW PO Box 7614 Federal Way Wa 98023 Federal Way Wa 98023 Sumner Wa 98390 873216 0290 109960 0070 147330 0090 GONCE LAURIE K GOTTERBARM DONALD P HAGEMAN FRED;NANCY 3146 SW 339th St 33704 35th Ave SW 34120 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 109960 0020 536020 0046 921150 0710 HAHN CUFFORD E HARRISON ROBERT R HASTINGS TIMOTHY;PATRICIA 33810 35th Ave SW 3420 SW 340th 3513 SW 339th PI Federal Way Wa 98023 Federal Way Wa 98003 Federal Way Wa 98023 921150 0530 308900 0006 921150 0360 HATCHER JOHN A;AMY K HEARLSON RALPH L;ULLIAN L HEIDAL GENE C 33834 37th Ave SW 34007 35th Ave SW 33924 38th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 442410 0010 921150 0630 638516 0050 HITCHENS ROBERT M HODGINS DARREL A IMHOF GLORIA L 10702 Country Club La S 3622 SW 339th PI 3617 SW 342nd Ct Seattle Wa 98168 Federal Way Wa 98023 Federal Way Wa 98023 954280 0470 873216 0320 921150 0090 INGLE JERRY D;DEBRA L JACK MICHAEL P;SUSAN C JACKSON LARRY 3306 SW 338th St 3147 SW 339th St 33817 35th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • • • • 921150 0380 921160 0660 147330 0010 JANSEN ROBERT F JARRETT BOOKER T;LOU1SE M. JURJEVICH JACK;GERALOINE L 33902 38th PI SW. 33820 37th Ave SW 34004 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 921160 0360 858120 0020 921160 0370 KABELEC RICHARD A;TERRILL E KELLY RICHARD T KIM SUN CHO 33916 38th PI SW • 3413 SW 340th PI 33908 38th PI SW • Federal Way Wa 98023 Federal Way Wa 98023 • Federal Way Wa 98023 • 921160 0480 638616 0190 921160 0760 • KRAUTKRAMER F M LEMUS JESUS C;MARIA C • LOONEY WILUAM A 33826 37th Ave SW 34217 36th PI SW PO Box 66098 Federal Way Wa 98023 Federal Way Wa 98023 Seattle Wa 98166 616100 0110 615100 0120 921160 0020 MAGILL RICHARD W;DIANE M MAI HONG THANH;THUY THU MALONE DANA L;PHYLLIS T 34218 38th PI SW 1618 8th St 33826 36th P1 SW Federal Way Wa 98023 Manhattan Beach Ca 90266 Federal Way Wa 98023 636020 0025 147330 0080 868120 0470 MANGOLD VELMA MAE MANNEN MAUREEN JO MAREZ SIMON O;BENNETT SARAH K 34116 35th Ave SW 34116 37th Ave SW 3402 SW 340th PI Federal Way Wa 99023 Federal Way Wa 98023 Federal Way Wa 98023 954280 0460 954280 0520 147330 0190 MARTIN TERRY W MASSER SHERRY ANN • MASSINGALE BRUCE R 33719 33rd PI SW 33808 33rd PI SW 34011 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 921160 0100 147330 0120 921150 0490 MAZURETS VASILIY;VALENTINA MUNSON WANDA R OLSON BRADLEY F;MARY R 33823 35th PI SW 34121 37th Ave SW 33831 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • 921150 0060 921150 0690 636020 0031 PARK KYUNG•S;SOON S PARKER DORIS JEAN PASINETTI TERESA 33804 35th PI SW • 3526 SW 339th PI 9406 29th Street Ct E Federal Way Wa 98023 Federal Way Wa 98023 Puyallup Wa 98371 • 921150 0050 147330 0100 921150 0730 PATTEN JEANINE;RICHARD A PELLEY DARRELL A;MARGIE L PENA JOHN J;YOLANDA Y 33808 35th PI SW 34128 37th Ave SW 3501 SW 339th PI Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 921150 0150 615100 0080 147330 0110 PENCE GERALD 0 PENCE JON L;VALERIE R PETERSEN KATHLEEN F 33816 36th Ave SW 34230 38th PI SW 34127 37th Ave SW Federal Way Wa 98023 • Federal Way Wa 98023 Federal Way Wa 98023 • • • 308900 0007 921160 0390 1150 0340 PETERSEN SHERMAN M PEVAN R DAVID;JOANNE PHIL LIPS SCOTT 3523 SW 340th St 2120 U St NW 3809 SW 339th St Federal Way Wa 98023 Auburn Wa 98001 Federal Way Wa 98023 636020 0061 954280 0600 638516 0010 PICKETT BRUCE D;KARIN S PIERCE J RICHARD;USA M PON LOEUN 33848 35th Ave SW 33813 33rd PI SW 34202 36th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • • 921150 0080 636020 0030 638615 0200 POULOS GARY L QUICK BERNIECE RABBA NIHAD;RUUWAYDA 4421 244th P1 SE 34112 35th Ave SW 34207 36th PI SW Issaquah Wa 98029 Federal Way Wa 98023 Federal Way Wa 98023 636020 0052 921150 0110 308900 0010 RAMSAY JAMES;LEONA J RANDALL ROBERT L RASMUSSEN HOWARD A;DEBRA L 33830 35th Ave SW 33829 35th PI SW 3617 SW 340th St Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 147330 0140 147330 0050 921150 0660 RAYMOND FRANCES C RETHERFORD MARY A RIGG DELAINE L;ROLAND L 34103 37th Ave SW 34028 37th Ave SW PO Box 24356 Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98093 873216 0310 638516 0020 960 0040 RIVAS RICHARD J;JANET M ROACH-BUCKNER SHIRLEY J RUSK JAMES R JR;SHANNON D 3151 SW 339th St 3612 SW 342nd Ct 33724 35th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 308900 0055 921160 0140 308900 0035 RUTEL MARK SCHMUTZ CHRISTOPHER H;JULIE SEAVERS DOUGLAS R SR 3506 SW 342nd St 33824 36th Ave SW 3616 SW 331st PI Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 954280 0480 147330 0170 147330 0200 SIGMUNDSSON SNORRI M;JEWETT STUNS IMANTS OR KATHLEEN L SMITH EDWIN A;PEGGY M 3305 SW 338th St 3702 SW Trenton St 34005 37th Ave SW Federal Way Wa 98023 Seattle Wa 88126 Federal Way Wa 98023 921150 0010 858120 0490 638616 0180 SMITH HENRY M JR SMITH LARRY F;TERESA LYNCH SMITH NANCY LYNN 33832 36th PI SW 3420 SW 340th PI 34225 36th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • 921150 0640 442410 0040 442410 0030 SNELL BONNIE L;TREVOR L CO- STANTON JACQUELINE MARIE SUTTON JIMMY B 1911 SW Campus Dr#433 3520 SW 343rd St 3616 SW 343rd St Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • 858120 0030 616100 0010 442410 0020 fAYLOR KYLE H;DEBORAH L H THAI PETER TI SON CRAIG R 3403 SW 340th PI 6919 47th Ave S 3512 SW 343rd St Federal Way Wa 98023 Seattle Wa 98118 Federal Way Wa 98023 109960 0060 954280 0440 536020 0027 VAN MATTA HELEN M VANBLARICOM DONALD L;V1CK1 WALTER JOHN H;AUBIN KAREN A 33718 36th Ave SW 33703 33rd PI SW 34130 36th Ave SW Federal Way Wa 98023. Federal Way Wa 98023 Federal Way Wa 98023 • 921160 0510 921150 0320 638616 0210 WARGO TIMOTHY J;GERMAN.WARGO WEDGEWOOD WEST ASSOC WESTGARD MORRIS O;PATTY J PATRICIA A 12605 Bel Red Rd 34201 36th PI SW 33839 37th Ave SW Bellevue Wa 98005 Federal Way Wa 98023 Federal Way Wa 98023 616100 0020 536020 0050 954280 0490 WHALEN DAVID L;PEGOY M WIERZBICKI JOYCE WILL WESLEY E;DEBRA JO 3811 S 266th PI 33914 35th Ave SW 33807 33rd PI SW Kent Wa 98032 Federal Way Wa 98023 Federal Way Wa 98023 921160 0520 615100 0100 615100 0050 WILUAMS WAYNE K WUMKES JON S YOTSUUYE WAYNE N 33838 37th Ave SW 34222 38th PI SW 34236 38th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • AFFIDAVIT OF DISTRIBUTION 7� rr-w(t0 � r S hereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Application 0 Notice of Proposed Land Use Action ❑ Notice of Action ❑ Notice of Public Land Use ❑ Notice of Application for Hearing Shoreline Management Permit ❑ Notice of Planning ❑ Notice of Determination of Commission Public Hearing Significance ❑ Shoreline Management Permit ❑ Notice of Determination of Non- Significance and 0 Notice of Public Hearing Scoping Notice before the Hearing Examiner ❑ Notice of Environmental 0 Notice of Land Use Determination of Non- Application Significance (SEPA) ❑ Notice of Environmental 0 Other Mitigated Determination of Non-Significance (SEPA) was m i d/faxed osted to/at each of following addresses ray a ache on , 1998 . Project Name 4 '31/"O f-H ST' I�'j ✓7'1�N /i�/9 File Number (s) - j�-bU© Signature �4 g Date y/o74k AFFLDAVI.FRM REVISED 4/7/98 fIESIOENT 232103 8003 921160 0080 921160 0390 RESIDENT RESIDENT 3601 SW 336th St 33811 35th PI SW 38th PI SW Federal Way We$8023 Federal Way Wa 98023 Federal Way Wa 98023 921150 0540 921150 0320 921160 0640 RESIDENT RESIDENT RESIDENT 33828 37th Ave SW 3817 SW 339th St 3626 SW 339th PI Federal Way Wa soon Federal Way Wa 98023 Federal Way Wa 98023 921160 0660 308800 0316 921160 0360 RESIDENT RESIDENT 33914 38th PI SW RESIDENT 3615 SW 339th PI 34020 Hoyt Rd SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 147330 0170 308900 0008 , 147330 0160 RESIDENT RESIDENT RESIDENT 34023 37th Ave SW 34021 35th Ave SW 34029 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 147330 0060 147330 0140 147330 0070 RESIDENT RESIDENT 34102 37th Ave SWRESIDENT 34109 37th Ave SW 34108 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 308900 0045 147330 0100 RESIDENT RESIDENT 308900 0035 RESIDENT 3606 SW 342nd Ct 3508 SW 342nd St 34123 36th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 308900 0060 615100 0010 RESIDENT RESIDENT 616100 0020 RESIDENT 34207 38th PI SW U216 38th PI SW 3611 SW 342nd St Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 616100 0120 615100 0090 RESIDENT RESIDENT 638516 0030 34210 38th PI SW RESIDENT 34226 38th PI SW 3606 SW 342nd Ct Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 442410 0010 615100 0040 RESIDENT RESIDENT RESIDENT 109960 0060 3502 SW 343rd St 34229 38th PI SW 33712 35th AVe SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 536020 0046 RESIDENT 33864.35th Ave SW Federal Way Wa 98023 921150 0040 308900 0046 147330 0180 ABNER ROBERT JR ADAMS RANDY K BAKER GERALD W;DOROTHY N 33814 35th PI SW 16420 SE 18th St 34017 37th Ave SW Federal Way Wa 98023 Bellevue Wa 98007 Federal Way Wa 98023 147330 0040 921150 0120 638516 0040 BARNES THOMAS S;TERESA M BARREN LYDIA BARTOLOMUCCI RAYMOND V • 34022 37th Ave SW 3616 SW 339th PI 3611 SW 342nd Ct Federal Way Wa 88023 Federal Way Wa 98023 Federal Way Wa 98023 921160 0720 864280 0630 921160 0650 BUOCHENKO VIKTOR;TAMARA BODEY DOREEN L BOLSTA ALLAN L • 3507 SW 339th PI 3219 SW 338th St 3621 SW 339th P1 Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 88023 636020 0026 964280 0510 921150 0070 BOSLEY SNOW T BROWN STEPHEN J CARLSON CHARLES B 34124 36th Ave SW 33814 33rd PI SW 33806 35th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 308900 0005 308900 0008 109960 0060 CARLSTROM ULUAN I CARLSTROM THOMAS L;S L CARPINITO JOHN M;VIRGINIA A 34111 35th Ave SW PO Box 1766 33711 33rd P1 SW Federal Way Wa 98023 Gig Harbor Wa 98335 Federal Way Wa 98023 • 615100 0090 615100 0040 954280 0540 CASTLE VERNON GEORGE JR CHAN RICKY;CHOW JIM SUN CHANEZ FEUX D 6802 Frances Ave NE 1837 Sunny Heights Or 33716 33rd P1 SW Tacoma Wa 98422 . Los Angeles Ca 90065 Federal Way Wa 98023. 147330 0130 638515 0070 858120 0460 CHRISTIANSEN RICHARD S II;M COOPER KEITH O;UNDA R COSTA GRANT!) • 34115 37th Ave SW 34236 36th PI SW 3328 SW 340th P1 Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • 921150 0500 536020 0005 109960 0030 COYNE LARRY CRAM ROBERT W DECELLES MARK D;UNA E 33835 37th Ave SW 3420 SW 344th St 33802 35th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 .__ 615100 0030 921150 0330 921150 0540 DELUCA CHRISTPOPHER L;MARCI OELZER RANDY D;ANAMARIA DIGNAM JAMES W;TERRIE L 34223 38th P1 SW 3815 SW 339th St 3903 SW 336th PI Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 638515 0030 308900 0060 858120 0010 OIWAN SUDEEP;MEGNA DOWNEY DOUGLAS C SR ERHARDT LOREN J 3717 Braebum Or NE 21654 1st Ct S 3421 SW 340th PI Tacoma Wa 98422 Seattle Wa 98198 Federal Way Wa 98023 SEp9 = -^--) 34 c\ Pot i • • teeln'wn? • 147330 0060 308900 0316 232103 9003 fALUS THOMAS R FALLIS T OMAS R FEDERAL WAY PUBLIC SCHOOLS 8479 Thunder Mountain Rd 34102 37th Ave SW 31405 10th Ave S Juneau Ak 99801 Federal Way Wa 98023 - Federal Way Wa 98003 147330 0030 858120 0480 147330 0020 FINNEY ALFRED F;JACQUEUNE FITZHUGH STUART W FOSS LYNN D 34016 37th Ave SW 3412 SW 340th PI 34010 37th Ave SW Federal Way Wa 98023 - Federal Way Wa 98023 Federal Way Wa 98023 921160 0130 921160 0700 308900 0026 FOSTER NORIKO FRAZIER JOHN L;NICKl L FREYBERG CLEO M 3624 SW 339th PI 3619 SW 339th PI 34029 35th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 536020 0006 873216 0300 FYLUNG E SCOTT GANG JOHN KEVIN;CONCHITIN GARLN�GTON PAMELA 109960 0010 LA 3400 SW 344th St 3150 SW 339th St 33818 35th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 921150 0030 954280 0550 147330 0070 GARNAND DON S;KAREN L GILBERT DAVID W GOGOUH REBECCA 33820 35th P1 SW 33708 33rd PI SW PO Box 7614 Federal Way Wa 98023 Federal Way Wa 98023 Sumner Wa 98390 873216 0290 109960 0070 GONCE LAURIE K GOTTERBARM DONALD P14T330 0080 3146 SW 339th St HAGEMANAve SWANCY 33704 35th Ave SW 34120 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 109960 0020 536020 0046 HAHN CUFFORD E HARRISON ROBERT R HASTINGS TIMOTHY;PATRIC A 921150 0710 33810 35th Ave SW 3420 SW 340th 3513 SW 339th PI Federal Way Wa 98023 Federal Way Wa 98003 Federal Way Wa 98023 921150 0530 308900 0006 921150 0360 HATCHER JOHN A;AMY K HEARLSON RALPH L;ULUAN L HEIDAL GENE C 33834 37th Ave SW 34007 35th Ave SW 33924 38th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 442410 0010 921150 0630 638516 0050 HITCHENS ROBERT M HODGINS DARREL A IMHOF GLORIA L 10702 Country Club Ln S 3622 SW 339th PI 3617 SW 342nd Ct Seattle Wa 98168 Federal Way Wa 98023 Federal Way Wa 98023 954280 0470 873216 0320 921150 0090 INGLE JERRY D;DEBRA L JACK MICHAEL P;SUSAN C JACKSON LARRY 3306 SW 338th St 3147 SW 339th St 33817 35th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 921150 0380 921160 0660 147330 0010 JANSEN ROBERT F JARRETT BOOKER T;LOUISE M. JURJEVICH JACK;GERALDINE L • 33902 38th PI SW. 33820 37th Ave SW 34004 37th Ave SW Federal Way Wa soon Federal Way Wa 98023 Federal Way Wa 98023 921160 0360 868120 0020 921160 0370 KABELEC RICHARD A;TERRILL E KELLY RICHARD T KIM SUN CHO 33916 38th PI SW • 3413 SW 340th PI 33908 38th PI SW • Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • 921160 0480 638616 0190 921160 0760 KRAUTKRAMER F M LEMUS JESUS C;MARIA C LOONEY WILLIAM A 33826 37th Ave SW 34217 36th PI SW PO Box 66098 Federal Way Wa 98023 Federal Way Wa 98023 Seattle Wa 98166 616100 0110 616100 0120 921150 0020 MAGILL RICHARD W;DIANE M MAI HONG THANH;THUY THU MALONE DANA L;PHYL LIS T <:: 34218 38th PI SW 1618 8th St 33826 35th PI SW • Federal Way Wa 98023 Manhattan Beach Ca 90266 Federal Way Wa 98023 4i 536020 0026 147330 0080 858120 0470 MANGOLD VELMA MAE MANNEN MAUREEN JO MAREZ SIMON O;BENNETT SARAH K 34116 36th Ave SW 34116 37th Ave SW 3402 SW 340th PI Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 954280 0460 954280 0520 147330 0190 MARTIN TERRY W MASSER SHERRY ANN • MASSINGALE BRUCE R 33719 33rd PI SW 33808 33rd PI SW 3401137th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • 921150 0100 147330 0120 921150 0490 MAZURETS VASILIY;VALENTINA MUNSON WANDA R OLSON BRADLEY F;MARY R 33823 35th PI SW 3412137th Ave SW 33831 37th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • 921150 0060 921160 0690 636020 0031 PARK KYUNG•S;SOON S PARKER DORIS JEAN PASINETTI TERESA 33804 35th PI SW • 3525 SW 339th PI 9406 29th Street Ct E Federal Way Wa 98023 Federal Way Wa 98023 Puyallup Wa 98371 • 921150 0050 147330 0100 921150 0730 PATTEN JEANINE;RICHARD A PELLET DARRELL A;MARGIE L PENA JOHN J;YOLANDA Y 33808 35th PI SW 34128 37th Ave SW 3501 SW 339th PI • Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 . 921150 0150 615100 0080 147330 0110 PENCE GERALD D PENCE JON L;VALERIE R PETERSEN KATHLEEN F 33816 36th Ave SW 34230 38th PI SW 34127 37th Ave SW Federal Way Wa 98023 • Federal Way Wa 98023 Federal Way Wa 98023 �.. :.. • . 308900 0007 821150 0390 1160 0340 `'PETERSEN SHERMAN M PEVAN R DAVID;JOANNE PHILLIPS SCOTT 3623 SW 340th St 2120 U St NW 3809 SW 339th St Federal Way Wa 98023 Auburn Wa 98001 Federal Way Wa 98023 636020 0061 964280 0600 638616 0010 PICKETT BRUCE D;KARIN S PIERCE J RICHARD USA M PON LOEUN 33848 36th Ave SW 33813 33rd PI SW 34202 36th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • 921160 0080 636020 0030 638616 0200 POULOS GARY L QUICK BERNIECE RABBA NIHAD;RUUWAYDA 4421 244th P1 SE 34112 36th Ave SW 34207 36th PI SW Issaquah Wa 98029 Federal Way Wa 98023 Federal Way Wa 98023 636020 0052 921150 0110 308900 0010 RAMSAY JAMES;LEONA J RANDALL ROBERT L RASMUSSEN HOWARD A;DEBRA L 33830 36th Ave SW 33829 35th PI SW 3517 SW 340th St Federal Way Wa 98023 Federal Way Wa 88023 Federal Way Wa 98023 147330 0140 147330 0050 921160 0660 RAYMOND FRANCES C RETHERFORD MARY A RIGG DELAINE L;ROLAND L 34103 37th Ave SW 34028 37th Ave SW PO Box 24356 Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98093 873216 0310 638615 0020 960 0040 RIVAS RICHARD J;JANET M ROACH-BUCKNER SHIRLEY J RUSK JAMES R JR;SHANNON D 3161 SW 339th St 3612 SW 342nd Ct 33724 35th Ave SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 308900 0055 921150 0140 308900 0035 RUTEL MARK SCHMUTZ CHRISTOPHER H;JUUE SEAVERS DOUGLAS R SR 3506 SW 342nd St 33824 36th Ave SW 3616 SW 331st PI Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 954280 0480 147330 0170 147330 0200 SIGMUNDSSON SNORRI M;JEWETT SILINS IMANTS OR KATHLEEN L SMITH EDWIN A;PEGGY M 3305 SW 338th St 3702 SW Trenton St 34006 37th Ave SW Federal Way Wa 98023 Seattle Wa 98126 Federal Way Wa 98023 921150 0010 858120 0490 638515 0180 SMITH HENRY M JR SMITH LARRY F;TERESA LYNCH SMITH NANCY LYNN 33832 36th PI SW 3420 SW 340th PI 34226 36th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 • 921150 0640 442410 0040 442410 0030 SNELL BONNIE L;TREVOR L CO- STANTON JACQUEUNE MARIE SUTTON JIMMY B 1911 SW Campus Dr#433 3520 SW 343rd St 3516 SW 343rd St Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 868120 0030 616100 0010 442410 0020 YAYLOR KYLE H;OEBORAH L H THAI PETER TI SON CRAIG R 3403 SW 340th PI 6919 47th Ave S 3612 SW 343rd St Federal Way Wa 98023 Seattle Wa 98118 Federal Way Wa 98023 109960 0050 954280 0440 636020 0027 VAN NATTA HELEN M VANBLARICOM DONALD L;VICKI WALTER JOHN H;AUBIN KAREN A 33718 35th Ave SW 33703 33rd PI SW • 34130 35th Ave SW • Federal Way Wa 98023_ Federal Way Wa 98023 Federal Way Wa 98023 • 921160 0610 921160 0320 638616 0210 WARGO TIMOTHY J;GERMAN-WARGO WEDGEW000 WEST ASSOC WESTGARO MORRIS G;PATTY J PATRICIA A 12606 Bel Red Rd 34201 36th PI SW 33839 37th Ave SW Bellevue Wa 98006 Federal Way Wa 98023 Federal Way Wa 98023 616100 0020 636020 0060 954280 0490 WHALEN DAVID L;PEGGY M WIERZBICKI JOYCE WILL WESLEY E;OEBRA JO 3811 S 265th PI 33914 35th Ave SW 33807 33rd PI SW Kent Wa 98032 Federal Way Wa 98023 Federal Way Wa 98023 921160 0620 615100 0100 615100 0050 WILLIAMS WAYNE K WUMKES JON S YOTSUUYE WAYNE N 33838 37th Ave SW 34222 38th PI SW 34235 38th PI SW Federal Way Wa 98023 Federal Way Wa 98023 Federal Way Wa 98023 CITY OF • (253)661-4000 33530 1ST WAY SOUTH FEDERAL WAY,WA 98003-6210 AFFIDAVIT OF DISTRIBUTION I . j�: /'c e) hereby declare, under penalty of perjury of the laws of the State of Washington, thak ❑ Notice of Application ❑ Notice of Proposed Land Use Action o Notice of Action 0 Notice of Public Land Use Hearing ❑ Notice of Application for Shoreline ❑ Notice of Planning Commission Public Management Permit Hearing ❑ Notice of Determination of Significance ❑ Shoreline Management Permit ❑ Notice of Detennination of Non- ❑ Notice of Public Hearing before the Significance and Scoping Notice Hearing Examiner ce of Environmental Determination ❑ Notice of Land Use Application of Non-Significance(SEPA) o Notice of Environmental Mitigated ❑ Other Determination of Non-Significance (SEPA) was mail:I faxes posted to/at each of following addresses(see attached) on ' A_ I ri , 1998. Project Name 4 Q. 311e,� 2 File Number(s) - ,Z Signature . % Date ` - /a ADAVI.FRM Revise() t/L98 04/10/98 FRI 14:11 FAX 2536614129 CITY OF FEDERAL WAY Ij001 ********s***********s *s* TX REPORT **s ********************* TRANSMISSION OK TX/R% NO 1482 CONNECTION TEL 95527042 CONNECTION ID TNT-TEL. SALES ST. TIME 04/10 14:10 USAGE T 01'10 PGS. 2 RESULT OK COVER SHEET • FAX To: //c/ r Fax#: b -� c5 From: ! C" Phone: G. _ l Subject: AjfeLlt, ✓ l-5 - Date: 'f'/G -' g' Pages: _a, including this cover sheet. COMMENTS: (V-i„.9-1",t) /tJ./Yt�f 4 • From: Stephen Clifton To: Scottw Date: Thursday, March 12, 1998 4: 11 pm Subject: Proejct Review Scott, Just letting you know that PW Development Services does not review any Capital Improvement Projects at this time. I've asked managers of the projects to provide you memorandums stating that the projects comply with applicable regulations. This applies to the S. 336th Street Widening Project (SEP98-0007) (Ken Miller) and SW 340th Street Detention Facility (SEP98-0009) (Marwan Salloum) . Please let Marwan know if you would like him to attend the DRC meeting on 3/19/98. Thanks. CC: Gregf, Marwans, Kenm, Jeffp, Caryr • - . . . •; :g2j-..". PT* • - • -." .. . .... . . - -:.• ...::;:::... . •- - __,,k,...... . .. .,:-.:,•-. gz.,..:*:::.--; - •:r.-•:-a, .7'• :-•.C.7-4 e,*:,.. . . .• • •7. '•••• •,!7.1 •",,,,•••• •'44* : 7:77 , 1 •A.,-..: %..,..,,?, ' .-..:1,:iz,•- -,1.0.1."':•---7-.. ,3 '.:-.1.-:.:•.. .1r,'.."4, • .•• :<• „,... '.....:-.:::::..- .:'.: • f..;;;';.,r7i,7•-. 1 '.'. -.: ••=-" -„---• .- • •li.,.:.*: . . ._... . ..,k--:•:•:••.- . . --- • X'.::15,:.• ••..,..,;rit. • ,-, , -..... .• -..;;•-..,.1'.1.411 •--• . .71.,..7...' :7.•:'..:::f.•!'.. ._., •.:;'. •• !%•• 747.; . ,--'- • ..... 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(1 c . . .:...:.• TO WRITER _. ga LI , 7 /.''N '..:::•:..: ADDRESSEE cc. „.. PM (0 "'":".. 'UNKNOWN • 2. ..,iN 4., W V oar I IMMO/4.,-.4st tisholisialmli liellint ill -Haim 411%. ........ -. • , \....','„;.:.••;,'. ......, . i'f,:jr.:»'... , •ir'? ••:..4---. .:•;f4.i..:; -.1.,','....-' ••:.,..,.,:l.';' ..';:•:.1-:..,': ."1:17r. ,„,..n..., '.. fiii%l'i.4S7.' , • gt .. i ".I-.',-.el:-; • •i;,7,.,..?...„.....,, • '''...•• •41:::•••• ••• • •,i-n. ..ev,,,.. - :••,:f -•::::•::: :,.4.,,Y.f-:,-. . .. •,,,,,.....: -,- . - „..... . ::,,Ff...,.... '-.A..4:t4• ;;•••.....:. •44.1.-7:-..., . -,..i;4 :•., ..4::.....1..: ...',:.41.,i. : ; •-, :.. . ,. .;;;4_,,,,. • ,„, ...--. - • .;.. ...,-.. ...,;,.-..- . .... • • •:,,4.,..•:;... ,-.• • ....- ::* •:`..:•••:ci.;:. .•-••:- .-' -,..-.• -,;•-•-..:, V-4):.-...,-.:-.,.:,:.. . ,. :;• ., . •,:e.....;; , _ . ' • . I -,?-iv4,..• . • .-: --"Atfi-e- : • • . ' 'It-••.... . ".*; • • •r<,;•-•.:,, . .it7i--?!.. •4, , ,._.‘"-'''-'•-•, •- •.14„,..,,,..i.i..-.4:. •''Sc'5'•' .. r . . , ....,,,, •. . :*•,.I.i...:. ...1*.t's..- r '.4-r,i,;•-. • LAKEHAVEN UTILITY DIS1. ICT 31627 1st Avenue South • P.O.Box 4249 •Federal Way,WA 98063 COMMUNITY DEVELOPMENT TECHNICAL REVIEW COMMITTEE AGENDA OF: March 19, 1998 ATTN: Mr.Scott Williams Contract Planner SUBJECT: Agenda Item No.2- SW 340th Street Detention Facility SEP98-0009 COMMENTS: Placement of the storm detention facility as proposed will require the adjacent property to the west to secure sewer service from SW 340th Street. SEPA comments will be provided by the District's Program&Policy Analyst,Mary Ausburn,under separate cover. You may contact her directly at(253)946-5440. c: MGA By: g/// C l/��'/ Date: .3/ Mary .Yung Supervisor of Technical/Support Services Direct Line: (253)946-5400 City of Federal Way Department of Community Services MEMO to Community Development Review Committee Date: August 14, 1997 Case Number: SEP98-0009 Project : SW 340th Street Detention Facility Location: South of SW 340th Street, between 37th Ave SW and 39th Ave SW Project Planner: Scott Williams HE BUILDING DIVISION, has reviewed the submitted information and has the following comments: No comments for this application. Respectfully, R. Lee Bailey Lead Plans Examiner CITY OF FEDERAL WAY COMMUNITY DEVELOPMENT REVIEW COMMITTEE DEPARTMENT OF COMMUNITY DEVELOPMENT Date: March 4, 1998 To: Public Works Development Review Lakehaven Utility District(Mary Young) Public Works Traffic Fire District No. 39 (Greg Brozek) Surface Water Management Police Department(Annette Spicuzza) Dion From: Department of Community Development Services Project Planner: Scott Williams, Contract Planner Phone No.: 661-4119 For DRC Mtg on: March 19, 1998 . Type of Review: SEPA Review File No.: SEP98-0009 Project Name: SW 340th Street Detention Facility Project Location: South of SW 340th Street, between 37th Avenue SW and 39th Avenue SW Parcel No.: 308900-0022 Description: SEPA threshold determination for construction of an 11.3 acre-foot stormawater detention pond. Applicant: Marwan Salloum, ext. 4095 C:\SCOTTW\DRCRFL.2 - RECEIVED Sheldon & Nov.2 f• tsar Associates, Inc. FEDERAI,WAYPUBLIC •WORKS 5031 University Way NE • Seattle,Washington 98105.4341 206/522-1214 • Fax:206/522-3507 '•.BogStomper@aol.com RECEIVED BY November 19, 1997 COMMt tN$,nEVELOPMFNT DEPARTMENT MAR 0 4 1998 Marwan Salloum, P.E. • Department of Public Works City of Federal Way 33530 1 st Way South Federal Way, WA 98003 • • RE: SW 340th Street Stormwater Detention Facility Project-Wetland/Stream Determination . Dear Mr. Salloum, This letter is intended to summarize my findings from a visit to the SW 340th Street Site on 17 - October 1997. The purpose of the site visit was to determine the presence/absence of wetlands or streams, and to delineate the features if found. I located one surface water feature on the site, a drainage ditch along the east property line. I understand that the Department of Public Works is proposing a regional stormwater detention facility for this site. As site plans were not provided for this site reconnaissance, it is unclear what impacts, if any, the proposed detention facility would have on the surface water feature on the site. General Characteristics of Site The site is located in the City of Federal Way. The parcel (tax parcel#3089000225) is long and narrow, oriented north-south, and extends from SW 340th Street to SW 342nd Street(see Figure 1). The site lies between 37th Avenue SW and 39th Avenue SW, but does not extend to these streets. The parcel is bound on the east by ten small lots with trailer homes, and on the west by vacant lots.' The site is approximately 2.5 acres in size. The land use in the surrounding area is mostly detached single-family residential at moderate to high density. The topography of the site is virtually level,with a topographic low along the east edge of the - property where a ditch has been created approximately 3-4 feet below average site grade. A slightly hummocky microtopography indicates.a history of disturbance of the surface soils. The property owner has indicated that an undetermined amount of fill was dumped on the site during construction activities along Hoyt Road in the 1970s or early 1980s.(Landau, Site Assessment, November 1997). It is unclear where the fill was distributed on the site, and to what depth. The soils in the area are mapped by the Soil Survey of King County Area Washington as Alderwood gravelly sandy loam, 0 to 6 percent slopes. This is a moderately well-drained upland soil with slow runoff. Alderwood soils were formed in glacial deposits. Areas mapped as Alderwood may include up to 15 percent poorly drained soils such as Norma, Bellingham, Wetland Analysis Environmental Planning Regulatory Coordination • Tukwila, and Shalcar. -A typical profile for this soil is as follows: 0-4 inches of very dark brown gravelly sandy loam 4-12 inches of dark brown gravelly sandy loam 12-27 inches of grayish brown gravelly sandy loam , 27-60 inches grayish brown weakly to strongly consolidated till The surface soils observed in sample points in the dry upland portions of the site are dark brown gravelly sandy loams that resemble Alderwood soils. The vegetation on the majority of the site is comprised of weedy grasses and herbaceous ;. species such as yarrow(Achillea millefolium),curly dodo(Rumex crispus),field chickweed (Cerastium vulgatum),.English plantain (Plantago lanceolata), and bluegrass (Poa sp.).' This _ vegetation forms a moderately dense cover. Occasional Scot's broom shrubs (Cytisus scoparius) are scattered across the site,with a dense thicket of Himalayan blackberry(Rubus • procerus) at the north end of the site. The vegetation on adjacent parcels to the east of the site is comprised of lawn grasses;weedy pasture grasses and herbaceous species dominate the vacant lots to the west. The site was forested before it was cleared in the late 1970s(Sallourn, - pers. comm., 18 November 1997). Characteristics of Observed Surface.Water Feature • The only surface water feature that occurs on this site is a ditch that runs straight along the east property line and curves to the west, ending near the southeast corner of the site. This ditch had flowing water in it during the site visit at an average depth of about.6 inches. The ditch is approximately 6 to 7 feet wide at the tops of its banks. Water enters the ditch at its south end through a culvert that passes under SW 342nd Street The water flows east in the ditch around the southeast corner of the site, then turns to flow north, and exits the site at its northeast corner via a culvert under SW 340th Street. At both the north and south ends of the site, the flow is tightlined into the City's stormwater drainage system and does not resurface anywhere in the vicinity of the site. The ditch displays field indicators that meet the three wetland parameters of the 1989 Federal Manual for Identifying and Delineating Jurisdictional Wetlands,the manual required for use by the City of Federal Way(see attached data forms). The ditch substrate is a mineral soil with low chromas (10YR 5/2) and bright mottles (7.5YR 5/8). Sample points in the ditch typically had 4 to 6 inches of standing or slowly-moving water over the soil surface. The ditch is vegetated with hydrophytic plant species including red alder(Alnus rubra), Pacific willow(Salix lucida var.. lasiandra), soft rush (Juncus effusus), and reed canarygrass(Phalaris arundinacea). These wetland characteristics are limited to the confines of the ditch. Regulatory Implications Wetlands that occur in human created surface water drainage facilities are not considered regulated wetlands under the Federal Way City Code if they meet a series of criteria, as listed in a memorandum to the City Planning Staff from the Director of Community Development Services, Gregory Moore, dated 27 March 1996. The memo is entitled "Applicability of Regulated Wetland City of Federal Way Department of Public Works Sheldon&Associates, Inc. SW 340th Street Stormwater Detention Facility Project 2 November 19, .1997 • • Provisions to.Human Created Surface Water Drainage Fadlities". The criteria listed in the memo were applied to the wetland on the SW 340th Street site and are discussed by number below. 1. The drainage facility must have been originally constructed on uplands. If located within a straightened, channelized, or otherwise disturbed natural watercourse, the feature may be • considered a regulated wetland. _ 1 While the ditch displays characteristics of both wetlands and streams, it is dearly not a naturally formed surface water feature. The ditch is perfectly'straight where it parallels the east site boundary, and has steep banks that are characteristic of a channeliied, excavated feature. Sample points dug in the vicinity of the ditch indicate that it was excavated in an upland area that did not previously have hydric soils. The wetland in the ditch has formed as a result of channeling stormwater into the ditch;the ditch has a low- - • enough gradient to hold water in the bottom for extended periods. 2. The facility must be actively operated for use as a surface water drainage facility. The ditch is apparently actively used as a surface water drainage facility in that it is connected by culverts to the City's stormwater drainage system. 3. The drainage feature must have been intentionally human created The ditch has clearly been excavated (see item 1). 4. Wetland conditions have not expanded beyond the originally constructed drainage facility boundary. The wetland does not extend beyond the bottom 8 inches of the ditch. 5. The drainage facility was not required or designed to fulfill mitigation requirements from previous wetland impacts. Information on the origin of the ditch could not be obtained. It is doubtful that this feature was created as a wetland compensation site given its limited functions, the absence of vegetated buffer to the east of the ditch, and the absence of hydrologic controls that are typically associated with constructed wetlands(i.e., standpipes or other outlet structures). 6. The Director finds that limited functions and values, and the intended design of the wetland as a drainage facility, do not warrant application of the city's wetland regulations. The wetland provides very limited functions due to its small size, low retention time, disturbed buffers, lack of structural complexity of the vegetation, and low aesthetic value and recreational opportunity. The primary function provided by this wetland is filtration of the water by the emergent vegetation to improve water quality. This function is limited by the rapid rate of flow through the wetland. A minor amount of degraded habitat is • provided by the wetland, primarily for common perching birds that are acclimated to urban development. City of Federal Way Department of Public Works Sheldon&Associates,Inc. SW 340th Street Storm water Detention Facility Project 3 November 19, 1997 From this assessment,1t•is likely that the wetland would be regulated by Federal Way only if the ditch meets the Federal Way Code definition for a stream or natural drainageway. According to this code,streams are defined as:. "courses or routes,formed by nature,including those modified by man, and generally consisting of a channel with a bed, banks or sides throughout substantially all their length, along which surface waters naturally arld normally flow in draining from higher to lower elevations The ditch,is a channel with bed and banks,but there is evidence to indicate that surface water'. did not historically"naturally and normally flow"across this site. The forest vegetation previously' covering this site was cleared in the late 1970s(Sallourn, pers.comm., 18 November 1997). Historical aerial photos from 1985 show a ditch along the east property line, however, prior to 1978, aerial photos show no signs of a natural drainage feature on the site °(Sallourn, pers. _ comm., 18 November 1997).. While It is difficult to discern surface features on forested land in • aerial photos, there are usually some signs that indicate the presence of a stream such as changes in forest composition or dark gaps in the canopy. In•addition to the review of the aerial photo;the topography of the area does not support the historic presence of a stream. The area is virtually flat with no linear low areas that would have carried a stream. The reason that the water flows on this site appears to be that the ditch was excavated below grade and then connected to the stormwater drainage system by culverts. Summary The surface water feature on the site has both stream and wetland characteristics, but interpretation of Federal Way Code and the March 1996 memo by the Director of Community Development Services indicate that this feature may not be regulated by the City of Federal Way as either a stream or a wetland. Historic photos indicate that no natural drainageways flowed on this site prior to the late 1970s. It appears that the ditch along the east property line was created in an upland area to convey stormwater, and that a wetland formed in the ditch as a.result of seasonal ponding due to the low gradient of the ditch. The final determination of the regulatory status of this surface water feature will be made by the City of Federal Way Planning Department. The conclusions drawn in this letter were based on limited sources of information.. The City may have additional information on this site that contradicts these conclusions. For this reason, the Planning Department should be consulted early in the planning process for this project. Sincerely, . it Kim Harper Wetland Ecologist Enclosure • City of Federal Way Department of Public Works Sheldon&Associates, Inc. SW 340th Street Storm water Detention Facility Project 4 November 19,1997 \)4,. 11: c a u 440„. ‘ ,f,,,i, NM Eiji n 1 o (/Q -4,it . ilo Kirk: 410004 Oigit "' up U _el u rik twi O(Ail 4:3 D I v C3 0 _ NV roapPc-__ __-_-----" vrog U 1 -.=))__ _ ei lardnediligaiLl11%-. ' 6ir •L . ,, Q o �,m. . , 1� Doom .) , ...... ,--. k_val mi a per. .44 Immo d .rWi MI ° EL i ' lag 11 I j a.g '. ..rtfskirre_ili -, A.,11 t: -1', wall" =0 Qp 1 II a ; - , ),,, 4. NM- .4°3II I a Q "illikil ip;4_ Ao O ■Qd acc itc.\. • Source: Federal Way Department of Public Works NOT TO SCALE Figure 1 - Site Map • DATA FORM 1 Routine Wetland Determination (WA State Wetland Delineation Manual or � 1987Delineation Corps Wetland Manual) / Project/Site: s✓3/o�ti fff'ef rm s' n/ ha1 Date: /3/I 7/97 Applicant/owner. -(eI (/Katy ber{-• a-T Pt h/-1/(I414, County: j;',' State: 1444- Investigator(s): to S/T/R: Do Normal Circumstances a ist on the site? yes o E '" Community ID: Is the site significantly disturbed(atypical situation)? yes o Dil+ Transect ID: Is the area a potential Problem Area? yes o Plot ID: DI. Poi/1, VEGETATION Dominant Plant Species h lavr.✓ Stratum • Indicator Dominant Plant Species Stratum Indicator _ -FAC- Sat Ii Y ve r.hi S S •FAC J+ .cJ' ci cWen s's j S S -Pa) f Aglite/c fied fetetALkl 75- fACIAI Jun cub 2gcsus /r f f HYDROPHYTIC VEGETATION INDICATORS: %of dominants OBL,FACW,&FAC: /00 D i l,, 1 // Check all indicators that apply&explain below: Regional knowledge of plant communities Wetland plant list(nat'1 or regional) ,/ OTHER Physiological or reproductive adaptations Morphological adaptations Technical Literature Wetland Plant Data Base Hydrophytic vegetation present? no Rationale for decision/Remarks: A//G itt awe. -41C rn-191CW HYDROLOGY Is it the growing season? no Water Marks: yes (n Sediment Deposits: yes n Based on: e,a o f se t an Ao s Drift Lines: yes Drainage Patterns: yes Dept.of inundation: 6 inches Oxidized Root(live roots) Local Soil Survey: yes Channels<12 in. es l) Depth to free water in pit: inches FAC Neutral: no Water-stained Leaves: yes w Depth to saturated soil: inches Check all that apply&explain below: Other: Stream,Lake or gage data: Aerial photographs: Other: Wetland hydrology present? yes no Rationale for decision/Remarks: Wd/o 160'N" —, �1/i M somt -C 64 �a✓ Xf "ISM -�i8� c/iw-inA �✓owinj gallon . • • DATA FORM 1 Routine Wetland Determination (WA State Wetland Delineation Manual or 1987 Corps Wetland Delineation Manual) Project/Site: jw30O skeet m DeAritmic /fl{j, I Date: /0//7/77 Applicant/owner: -�ik W47 Deft, of , Rig/ .W'�KS County: .KI;, �11 / State: Investigator(s): , / t,r ✓ S/T/R: Do Normal Circumstances exist on the site? tip no Community ID: Is the site significantly disturbed(atypical situation)? :c o Transect ID: Is the area a potential Problem Area? yes Plot ID: L)P ?-- VEGETATION • Dominant Plant Species (p/ / Stratum Indicator Dominant Plant Species Stratum Indicator ,Pu rn.e-,X or•&l 1/ -FAQ+ , ,/lea m17/e n/111,rn 10 cAGv Pla-e&jo /ance,/S. 1O ht Q16, Ir e�• �Sb FGiGv HYDROPHYTIC VEGETATION INDICATORS: %of dominants OBL,FACW,&FAC: SO-7 St Check all indicators that apply&explain below: Regional knowledge of plant communities Wetland plant list(hat'I or regional) OTHER Physiological or reproductive adaptations Morphological adaptations Technical Literature Wetland Plant Data Base Hydrophytic vegetation present? yes no Rationale for decision/Remarks: HYDROLOGY Is it the growing season? + no Water Marks: yes Sediment Deposits: yes Based on: PM.( fte 4 Aa ) Ao440 s Drift Lines: yes '!t9' Drainage Patterns: yes. Dept.of inundation: inc eh s Oxidized Root(live roots Local Soil Survey: yes Channels<12 in.yes Depth to free water in pit: inches FAC Neutral: yes Water-stained Leaves: yes 6 Depth to saturated soil: — inches Check all that apply&explain below: Other. Stream,Lake or gage data: Aerial photographs: Other: Wetland hydrology present? yes Rationale for decision/Remarks: A ;�� • DATA FORM 1 Routine Wetland Determination (WA State Wetland Delineation Manual or 1987 Corps Wetland Delineation Manual) Project/Site: sw Y/J" c-AxeCt S1 -,p/ .JbettAm /rZ Date: /o/17`g7 Applicant/owner: ceekv.4 6 Pd'c.P.k✓y ; County: 4mA State: VA Investigator(s): K. /40 2,✓' S/T/R:. Do Normal Circumstances exdt on the site? yes o community ID: Is the site significantly disturbed(atypical situation)? yes- o i} Transact ID: Is the area a potential Problem Area? yes o _ Plot ID: DP 3 VEGETATION Dominant Plant Species 1,timeir Stratum • Indicator Dominant Plant Species Stratum Indicator x- A&Ltc rulea Is s -FAL J7 CU6 P wsus /0 RAo,) f�1a�e S aeuldietAriA go f kAN pLa Is-14iia -3 HYDROPHYTIC VEGETATION INDICATORS: %of dominants OBL,FACW,&FAC: /O° !� ' 6 �l • Check all indicators that apply&explain below: / Regional knowledge of plant communities Wetland plant list(nat'l or regional) 1 OTHER Physiological or reproductive adaptations Morphological adaptations Technical Literature Wetland Plant Data Base Hydrophytic vegetation present? ® no Rationale for decision/Remarks: / 4ll G n/144,Js d4'-146141 HYDROLOGY Is it the growing eason? no Water Marks: yes Sediment Deposits: yes q7 Based on: ea 614 F.2aC,Sahl ho fj�' Drift Lines: yes Drainage Patterns: yes Dept.of inundation: inch Oxidized Root(live room Local Soil Survey: yes o Channels<12 in. des nq Depth to free water in pit: inches FAC Neutral: e no Water-stained "•• Leaves: yes >o Depth to saturated soil: inches Check all that apply&explain below: Other: Stream,Lake or gage data: Aerial photographs: Other: Wetland hydrology present? ® no Rationale for decision/Remarks: // G c/c /0046--2XT s�u� iod 14,41,1 yrnwi -r! NOV-14-97 FRI 17:18 LANDAU TACONA FAX NO. 2069262531 P. 02 e PETEIVV�ED DEPARTMENT MAR fihnsT Draft Phase I Environmental Site Assessment Report Proposed SW 340th Street Detention Facility Parcel No. 30890000225 Federal Way, Washington November 14, 1997 Prepared for City of Federal Way Federal Way, Washington Prepared by LANDAU ASSOCIATES,INC. 11/14/97 FRI 16:15 (TX/RI NO 6566] NOV-14-97 FRI 17: 19 LANDAU T^^0MA FAX NO. 2069262531 P. 03 DRAFT TABLE OF CONTENTS 1.0 INTRODUCTION 1 2.0 SCOPE OF SERVICES 1 3.0 SITE DESCRIPTION AND SETTING 1 4.0 SITE GEOLOGY/HYDROGEOLOGY 2 5.0 SITE HISTORY 2 5.1 HISTORICAL SITE USES 3 5.2 HISTORICAL ADJACENT SITE USES 4 6.0 AGENCY INFORMATION REVIEW 4 6.1 FEDERAL WAY COMMUNITY DEVELOPMENT DEPARTMENT 5 6.2 FEDERAL WAY FIRE DEPARTMENT 6 6.3 SEATTLE-KING COUNTY DEPARTMENT OF PUBLIC HEALTH 6 6.4 KING COUNTY DEPARTMENT OF DEVELOPMENT& ENVIRONMENTAL SERVICES 6 6.5 KING COUNTY DEPARTMENT OF NATURAL RESOURCES 6 7.0 SITE RECONNAISSANCE 7 7.1 SITE 7 7.2 ADJACENT SITE OBSERVATIONS 8 8.0 NONSCOPE CONSIDERATIONS 9 9.0 SUMMARY OF FINDINGS AND CONCLUSIONS 9 10.0 USE OF THIS REPORT 11 APPENDICES APPENDIX A APPENDIX B LIST OF FIGURES Figure Title 1 Vicinity Map 2 Site Plan 11/14/97 IAPROJbCT\21e\017.10\EWUhTFACRPT ll 11/14/97 FRI 16:15 [TX/RI NO 6566] NOV-14-97 FRI 17:19 LANDAU TAWOHA FAX NO. 2069262531 P. 04 DRAFT 1.0 INTRODUCTION This report presents the results of a Phase I environmental site assessment(FSA)performed at the site of the proposed SW 340th Street Detention Facility(referred to in this report as the site)located between SW 340th Street and SW 342nd Street and approximately 200 feet east of 39th Avenue SW,in the City of Federal Way,Washington. The attached Vicinity Map,Figure 1,shows the site relative to nearby roads and other features. Figure 2,the Site Plan,shows conditions at the site on November 6. 1997. The Phase I ESA was conducted in general accordance with the guidelines of the American Society for Testing&Materials(ASTM)as identified in their Standard Practice for Environmental Site Assessment Process, E 1527-94, and as currently applied in the Puget Sound region. This standard, while subject to change as all standards are,is recognized as generally meeting the due diligence requirements of the Superfund Amendments and Reauthorization Act(SARA)of 1986(42 USC 9601(35)(AX1)J and the Washington State Model Toxics Control Act(MICA) [RCW 70.105D.040]. 2.0 SCOPE OF SERVICES The Phase I ESA was conducted by Landau Associates,Inc. for the City of Federal Way(City), to assess the potential for hazardous substances or materials to exist on the site. The scope of services performed,as established in a September 24, 1997 proposal to the city of Federal Way,consisted of a review of site history and agency information, and observations of current land use activities and environmental conditions. Authorization to proceed with these services was provided by the City on October 10, 1997. 3.0 SITE DESCRIPTION AND SETTING The site is located south of SW 340th Street and north of SW 342nd Street and approximately 200 feet east of 39th Avenue SW. The site consists of an undeveloped lot. A drainage ditch runs along the southeastern and eastern edge of the site. The site is bordered on the north,northeast,east,southeast,south,and northwest by residential homes. A single dwelling and undeveloped land border the site to the west. A city of Federal Way detention pond is located to the southwest of the site,across SW 342nd Street. 11/14/97 1:\rtuor•.C1123d\017.10\VWDETFAC.12n 1 11/14/97 FRI 16:15 (TX/R% NO 6566] NOV-14-97 FRI 17:20 LANDAU TACOMA FAX NO. 2069262531 P. 05 DRAFT The area surrounding the site consists primarily of single-family dwellings with some commercial development to the south,Including a QFC grocery store and a medical clinic currently under construction. 4.0 SITE GEOLOGY/HYDROGEOLOGY The Puget Sound Region is underlain by Quaternary and older sediments deposited by a number of glacial episodes. Regional soil units consist primarily of interlayered and/or sequential deposits of clays, silts,sands and gravels that are typically situated over or under deposits of glacial till. With the exception of the most recent recessional deposits, the tills and buried soil units have been over-consolidated by the overriding ice sheets. The geologic strata mapped at the site is classified as Vashon till(Macky Smith 1976). According to the site owner,an undetermined quantity of fill was brought onto the site during construction activities along Hoyt Road in the late 1970s or early 1980s. The exact source(s)location of this fill is reportedly unknown. Surlicial and shallow soil observed in several areas across the site generally consists of silt,sand and silty sand with gravel fill. Based on topography,sutface water at the site migrates to the east-southeast toward the drainage ditch. Shallow groundwater flow at the site is unknown at this dine. 5.0 SITE HISTORY A variety of resources were utilized to develop the history of the site and adjacent properties in order to assess the potential for contaminates of concern to exist on or near the parcel. These resources included the following: • Aerial photographs (Pacific Aerial Surveys 1961 and 1965, Washington Department of Natural Resources 1965, 1970, 1978, 1985,and 1996;Walker& Associates 1936 and 1946; and Washington Department of Transportation 1961) • Topographic maps(U.S.Geological Survey 1949, 1961, 1968, 1973, 1981,and 1994) • King County real estate atlases (Masker Map Company 1926 and 1936. and Kroll Map Company 1940, 1946,and 1958) • City directories(R.L.Polk 1997) • A historical title report(All Lands Title 1939-1986)[Report presented in Appendix A) 11n4/97 E\PROJECr\238\ot7,10\FWDbTrnc.Rpr 2 11/14/97 FRI 16:15 [TX/RI NO 6566] NQV-14-97 FRI 17:20 LANDAU TACOMA FAX NO. 2069262531 P. 06 DRAFT • Historical property assessment records (Washington State Archives-Puget Sound Branch 1939-1973) • Interview with the current site owner(Thomas Fallis). 5.1 HISTORICAL SITE USES A review of aerial photographs,topographic and other maps,and real estate atlases show that the site consisted of undeveloped forest land from at least the mid 1930s to the late 1970s. Between the late 1970s and mid 1980s the site was cleared of ground cover. Real estate atlases published between 1926 and 1958, and the All Lands Title historical title report, show that the site is part of a tract known a, Hannon's Half Acres. According to site owner Thomas Fallis(1997),who acquired the site in 1976, he was unsuccessful in building manufactured housing on the site.However,as part of the attempted development, he installed a series of sewer line stubouts in 1976-1977 along the eastern boundary of the site. At the time of acquisition Mr. Fallis reported that the site was covered with alder trees and brush and that he cleared the property by 1978. Between 1976 and 1978 he found evidence of illegal dumping on the site(junked vehicles,household appliances,and roadside garbage and debris).In the late 1970s or early 1980s,during Hoyt Road construction activities,an undetermined quantity of fill was brought onto the site,with the approval of Fallis,by the parties involved with road construction. The material was"used to fill puddles and stump holes." Over time,Fallis noted he has allowed acquaintances to park heavy equipment and vehicles on the site. A review of the historical title report obtained from All Lands Title(Appendix A)shows that 16 real estate transactions were recorded between 1939 and 1988 pertaining to the site.Hedwig Hanke acquired the site in 1939 and after that recorded real estate transactions were between private parties. The current site owner,Thomas Fallis, acquired the site from Carl and Marguerite Hanke in 1976 in a partnership known as Centennial Estates with Harold Juntti (now deceased). The historical title report also shows that four easements were recorded between 1976 and 1982 pertaining to the site. In 1976 Harold Juntti granted an easement for an underground electric system to Puget Sound Power&Light Company for all lots comprising the site. Also, in 1976,Juntti signed an agreement with the Lakehaven Sewer District for sewer services to the site. In 1977 Thomas Falls granted an easement for purposes of ingress,egress,and utilities over,under, and across the lots comprising the site. Fallis also granted an easement in 1982 to the Lakchaven Sewer District for a perpetual right-of-way for sewer mains through,over,and across the lots comprising the site. I 1 it4/97 i\elto1rM239\uv.to\VwDETFP.C.fu r 3 11/14/97 FRI 16:15 IT%/RX NO 6566] NOV-14-97 FRI 17:21 LANDAU TA('OMA FAX NO. 2069262531 P. 07 DRAFT Historical property assessment records for the site were obtained from the Puget Sound branch of the Washington State Archives. These records show that the site was first assessed in 1939 when F.H.Hanke owned it. The records also show that the site was unimproved and SW 340th Street was known as English Avenue. 5.2 HISTORICAL ADJACENT SITE USES A review of historical aerial photographs,topographic and other maps,real estate atlases, and other resources show that the area surrounding the site was largely undeveloped forest land until the mid to late 1970's.Over the past two decades,most of the surrounding area has been residentially developed(a 1997 city directory 1R.L Polk]shows that the immediately adjacent streets are residential in nature).Specific historical adjacent site uses are described below, The area north of the subject site consisted of undeveloped forest land until the late 1960s and early 1970s when SW 340th Street was built and residential housing was established. The area south of the subject site was occupied by the SW 342nd Street corridor as early as the mid 1930s;however, the area along the street corridor consisted of undeveloped forest land and scattered single family dwellings until the mid 1980s. Between 1985 and the present,this area was developed with residential housing and a grocery store. The area east of the subject site consisted mostly of undeveloped land and scattered single family dwellings until the mid 1960s when 37th Avenue SW was built. This area has been occupied by that street corridor and manufactured housing since the mid 1970s. The area west of the subject site has been occupied by a single family dwelling since at least 1936. No other development has apparently occurred on this parcel over the past 60 years. The dwelling is adjacent to the 39th Avenue SW/Hoyt Road corridor, which also has existed since at least 1936. 6.0 AGENCY INFORMATION REVIEW Environmental Data Resources,Inc.(EDR)was subcontracted to conduct a search(as prescribed by ASTM)of U.S.Environmental Protection Agency(EPA)and Washington State Department of Ecology (Ecology)environmental databases that pertain to the site and other properties located within a 1-mile radius of the site. The report shows that the site does not appear on any of the databases searched by EDR.Although the report states that the Commencement Bay Nearshorc/rideflats Superfund site is the only site of concern 11/14/97 1:\PROJECT\235\017.19kFWDETFAC.RIT 4 11/14/97 FRI 16:15 [TX/RI NO 6566] NOV-14-97 FRI 17:22 LANDAU TACOMA FAX NO. 2069262531 P. 08 DRAFT within approximately a 1-mile radius of the subject property, it is our opinion, based on previous site investigation experience with that Superfund site, that it is not within a 1-mile radius of the subject site. Moreover, based on surface and subsurface geologic and hydrologic conditions, it is our opinion that the Superfund site does not pose environmental or human health risks to the subject property. Based on a conversation with the mapping technician at EDR(1997),the EPA has apparently not yet provided accurate boundaries of the Superfund site to EDR. Therefore, to compensate,EDR has expanded the boundaries to account for potential boundaries of sub-surface contamination. Appendix B presents the results of EI)R's database search,and a map illustrating the area searched for listed sites of concern. As is common to database searches keyed into a geographic mapping system,EDR reported that 10 sites,known as orphan sites,were not mappable due to incomplete address or other identifying information. By comparing the EDR list of orphan sites to the required 1-mile radius search distance on a real estate atlas, we determined that the orphan sites are at or more than 1 mile from the subject site, or are the type of site that does not require further inquiry. Besides researching EPA and Ecology databases, we also contacted the Federal Way Fire Department, Federal Way Community Development Department, the Seattle-King County Department of Public Health, and King County departments of Natural Resources and Development and Environmental Services for information pertaining to the environmental quality of the site and surrounding area. That information is summarized below. 6.1 FEDERAL WAY COMMUNITY DEVELOPMENT DEPARTMENT Files pertaining to the subject property were reviewed at the City of Federal Way by Mr. Dale Stirling (subcontracted historian) on October 21, 1997. Bob Baker, Deputy City Clerk, provided review assistance and photocopies of documents from the files.A review of the files shows that many complaints have been lodged against subject property owner Thomas Fallis. However,most complaints and other actions relate to property he owns east of the subject property. Specific to the subject property, an anonymous complaint was filed on September 1, 1992 about grading,drainage,and dust issues,and another complaint was filed on September 24, 1992 about a developer(presumably Thomas Fallis)placing a bale of hay in a drainage ditch located west of 37th Avenue SW which caused water to back up. It is not clear whether the City took action on the first complaint,however,the City determined that the developer needed to install a silt fence along the ditch to prevent more damage (follow up activity is not reflected in the file). Although not explicitly 1l/14/97 l:\PROJBCr\238\017.10\pWD('rfACRiT 5 11/14/97 FRI 16:15 [TX/R% NO 6566] NOV-14-97 FRI 17:22 LANDAU TACOMA FAX NO, 2069262531 P, 09 DRAFT mentioning the subject property,a complaint filed on August 3, 1988 related to the developer(Fallis)placing fill throughout the parcel located west of the subject property with potential wetland filling occurring as well. 6.2 FEDERAL WAY FIRE DEPARTMENT According to Fire Inspector Gordon Goodsell(1997),who has been with the department since 19$5, there have not been any fire or hazardous material response calls to the site. Similarly.he does not recall any significant fire or hazardous material response calls to the surrounding area. 6.3 SEATTLE-KING COUNTY DEPARTMENT OF PUBLIC HEALTH According to environmental health specialist Meg Blanchet (1997), the local hazardous waste management program does not have information pertaining to the site or surrounding area. Similarly, sanitarian Paul Robinson(1997)says there are no known environmental health issues associated with the site and surrounding area. 6.4 KING COUNTY DEPARTMENT OF DEVELOPMENT & ENVIRONMENTAL SERVICES A review of the department's database(1990-present)and hard copy files(1977-1989) by a code enforcement technician (1997) shows that no complaints or violations relating to building, zoning, construction,or land development are on record. 6.5 KING COUNTY DEPARTMENT OF NATURAL RESOURCES According to Engineering Aide Candy McKay(1997),a King County engineer in 1989 lodged a complaint relating to drainage problems west of 37th Avenue SW between SW 342nd and SW 340th. He observed that flooding was possible because a ditch between SW 342nd and SW 340th streets was not ' regraded after the City of Tacoma installed a new 36"line in the area. • 11/14/9 u\wtoJecr\23M01710\EWOHTrncatrt' 6 11/14/97 FRI 16:15 (TX/Rg NO 6566] NOV-14-97 FRI 17:23 LANDAU TACOf1A FAX NO. 2069262531 P. 10 DRAFT 7.0 SITE RECONNAISSANCE On November 6, 1997,Ms.Becky Bostwick of Landau Associates conducted a reconnaissance of the site and adjacent properties to assess current land use activities and environmental conditions. The reconnaissance was documented with notes,and photographs. In addition,four shallow hand probes were dug in order to confirm the presence of,and generally characterize,the fill that was reportedly deposited on the site in the late 1970s or early 1980s. Features of the site and adjacent properties, as observed during the site reconnaissance,arc illustrated on the Site Features Map,Figure 2. 7.1 SITE The site is currently an undeveloped parcel. A majority of the site slopes gently downgradient to the east toward a drainage ditch running along the southeastern and eastern margins. Surface water in the drainage ditch was observed to flow toward the north. Stonmwater generated on the site appears to generally flow toward the drainage ditch,however,there are low areas throughout the site where standing water was observed. Surface water runoff from SW 342nd Street appears to flow onto the site and drain into the site soils and the drainage ditch. Vegetation on the site consists of tall grass,blackberry vines,tree saplings and cattails along the drainage ditch. Along the northeastern edge of the site scattered debris including wood. an empty 5-gallon bucket labeled as Omnipak 2 Multi-purpose detergent, and a metal pipe, were observed. In addition, a green gel substance was observed near the southwestern corner of the site. The gel appears to have been in a white plastic bag,however,most of the bag was missing and no label could be identified on the remaining portion of the bag. The unidentified gel substance could contain potentially hazardous materials. Testing would be requited to assess if potentially hazardous substances are present. At the time of the site reconnaissance Landau Associates dug four shallow band probes in order to confinn and generally characterize fill that was reportedly deposited on the site. Surficial and shallow soil observed in several areas across the site generally consists of silt,sand and silty sand with gravel. No odors or unusual conditions were noted at the probe locations. In addition,we noted black sediment along the bottom of the drainage ditch on site. A hydrocarbon odor was detected in the sediment. No sheen was identified on the surface of the water. Based on field 11/14/97 1:\PROJECT\Z18\01710\PWMT1;AC.RPr 7 11/14/97 FRI 16:15 [TX/RI NO 6566] nwv 111 1 i 'cat LHNUHU I HUt1ff FAX NO. 2069262531 P. 11 • DRAFT evidence,it appears that petroleum hydrocarbons may be present in the drainage ditch sediments. The source of the hydrocarbons is unknown,however,surface runoff from SW 342nd Street may be a contributor. 7.2 ADJACENT SITE OBSERVATIONS As part of the site reconnaissance, Landau Associates also examined the following adjacent properties from public rights-of-way or the site to assess current land use activities and environmental conditions: • Residential developments(north,northeast,east,southeast,south and northwest adjacent properties) • SingIe family residences with undeveloped land(west adjacent property) • City of Federal Way detention pond(southwest adjacent property). On several of the east adjacent residential homes,junk cars and cars undergoing maintenance were observed.The maintenance appears to be small scale,and while it is possible that these activities could result in localized areas of staining and small releases,there was no stained soil,stressed vegetation or other evidence of soil or groundwater contamination observed on these adjacent properties at the time of the site reconnaissance. Further south of the south adjacent residential properties and and the City detention facility, commercial property including a QFC grocery store with a large parking area,and a medical facility under construction, were identified. Several trucks, trailers, piles of wood and concrete were observed on the west adjacent property. One of the trucks has an approximate I,000-gallon tank. A smaller truck has an approximate 250-gallon tank. Black staining was visible on the sides of the 250-gallon tank and truck. The trucks and other debris are located approximately 100 feet to the west of the site boundary. It is possible that localized areas of staining and small releases are associated with the observed trucks and debris; however, there was no stained soil, stressed vegetation or other evidence of soil or groundwater contamination observed on this adjacent property at the time of the site reconnaissance.. 11/1407 L\PRojgChZlrl‘p17.10\FW1xLTPnC.RPT 11/14/97 FRI 16:15 1TX/RX NO 6566] NUV-14—y f h M 1 11:24 LANDAU TAC011A FAX NO. 2069262531 P. 12 DRAFT 8.0 NONSCOPE CONSIDERATIONS The ASTM standard for Phase I ESAs includes several nonscope consideration items(e.g.,asbestos containing materials,radon,lead in paint,lead in drinking water, and wetlands). Field observations suggest the presence of wetland type vegetation along the drainage ditch. According to the EPA (1993), the site area, which is part of the Puget Lowlands physiographic province,"has very low radon potential because of high rainfall and consequently high soil moisture,and low uranium content of soils." 9.0 SUMMARY OF FINDINGS AND CONCLUSIONS A review of site history shows that the parcel consisted of undeveloped forest land from at least the mid 1930s to the late 1970s.Between the late 1970s and mid 1980s the site was cleared of ground cover and filled. The area surrounding the site was largely undeveloped forest land until the mid to late 1970s. Over the past two decades, most of the surrounding area has been residentially developed. A review of federal and county information shows that the site has not been documented by federal or state agencies to have environmental problems. A review of local agencies indicated that several complaints relating to drainage problems were lodged against the site owner. A review of the environmental database search indicates that the Commencement Ray Nearshomll'ideflats Superfund Site is the only site of concern within approximately a one mile radius of the site. II is our opinion, based on previous site investigation experience with that Superfund site, that it is not within a 1-mile radius of the subject site.Moreover,based on surface and subsurface geologic and hydrologic conditions, it is our opinion that the Superfund site does not pose environmental or human health risks to the subject property. Fill of unknown thickness and quality is present on the site. The owner claims that portions of the site have been filled with soil generated from construction activities of Hoyt Road SW during the late 1970's or early 1980's. The source of the fill was not confirmed. Testing would be required to assess the presence or absence of any potentially hazardous substances in the fill. However,in our opinion,the risk of potentially hazardous substances within the fill is low enough to justify a no further action decision on the part of the City at this time. If the City conducts a geotechnical survey of the site, the environmental quality of the fill could be assessed concurrently with the geotechnical investigation. 11/14/97 t:\PRCliFxT 017.10\FWU6TFAC.RPT 9 11/14/97 FRI 16:15 1TI/RI NO 6566] NQV-14-97 FRI 17:25 LANDAU TACOMA FAX NO. 2069262531 P. 13 DRAFT A green gel substance was observed near the southwestern corner of the site(sex Figure 2). The gel appears to have once been in a white plastic bag;however,most of the bag was missing and no label could be identified on the remaining portion of the bag.The gel could contain potentially hazardous materials. Testing would be required to assess if potentially hazardous materials are present. There are several options available to the City that could be pursued in dealing with this unknown substance: The current owner of the property could dispose of the gel substance; the city could test the contents of the gel substance and then dispose of it properly depending on the results of the test;or the City could notify the City health department or Ecology of the presence of the unknown gel substance. We suggest the City initially pursue having die owner deal with the unknown gel substance,or contact the health department or Ecology. Historical activities on the site included illegal dumping(junked vehicles,household appliances,and roadside garbage and debris) between 1976 and 1978. in addition, the owner of the site has allowed acquaintances to park heavy equipment and vehicles on the site. Due to these past activities there is a potential for areas to contain elevated levels of petroleum hydrocarbons and related constituents. However, there was no evidence of dumping.staining,or stressed vegetation at the time of the site reconnaissance(other than the green gel substance). Therefore,in our opinion,no additional investigation is warranted relating to these past activities. Several trucks, trailers,piles of wood and concrete were observed on the west adjacent property. One of the trucks has an approximate 1,000-gallon storage tank; in addition, a smaller truck has an approximate 250-gallon storage tank Black staining was visible on the sides of the 250-gallon tank and truck. Due to the distance from the subject site,it is our opinion that no additional investigation is warranted relating to activities on the west adjacent property. In addition,at several of the east adjacent residences,junk cars and car maintenance activities were observed. The maintanaince appeared to be on a small scale;therefore,it is our opinion that no additional investigation is warranted relating to activities on the east adjacent properties. Surface water runoff from SW 342nd Street and catch basins in the site vicinity appear to flow north to the site and infiltrate into site soils. Based on field evidence it appears that there is the potential for elevated levels of petroleum hydrocarbons in the sediment in the drainage ditch on-site.The source of the hydrocarbons is unknown,however surface runoff from SW 342nd Street may be a contributor. The presence of elevated levels of petroleum hydrocarbons cannot be accurately assessed without sampling and laboratory analysis. Due to the unknown volume of sediment which could be compacted, we suggest at least a screening level assessment of this issue prior to purchase. If analysis of the sediment indicates levels of petroleum hydrocarbons or other substances above MTCA cleanup levels, impacted sediment may require special handling/disposal if planned construction will involve ditch relocation. In addition, a study to identify the 11/14/97 1: PROJECT\?3$‘017.10‘t+WDErFAC.RYr 10 11/14/97 FRI 16:15 IT%/Rg NO 6566] NOV-14-97 FRI 17:26 LANDAU TACONA FAX NO. 2069262531 P. 14 DRAFT source of the contaminants may be needed to assess the potential for recontamination. If analysis of the sediment indicates that levels are below MTCA cleanup levels,no special measures should be needed. • 10.0 USE OF THIS REPORT This Phase I ESA was undertaken and this report prepared for the exclusive use of the City of Federal Way for specific application to the subject site. It is intended to provide the City of Federal Way with an understanding of the potential environmental liabilities associated with the site evaluated in this report. Reliance on this report by third parties or others who do not have a contractual relationship with Landau Associates on this project is at their sole risk. This report is based on observations and information obtained during one visit to the site, supplemented with information obtained by Landau Associates and described herein. In evaluating the site, Landau Associates has relied,in good faith,on representations and information abstracted from sources noted in this report to the extent they have not becn contradicted by site observations or data obtained from other sources. Accordingly, Landau Associates accepts no responsibility for any deficiency, misstatements, omissions,or misrepresentations in the information provided to us. Determining whether site conditions defined in this report represent contamination at levels of concern is a matter of judgment. Liabilities associated with contaminated sites are defined in part by the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and, for property located in Washington State,by the Model Toxics Control Act(MTCA). The MTCA cleanup regulation. WAC 173-340,defines the administrative process for identification,investigation,and cleanup of hazardous waste sites. It also includes detailed requirements for establishing cleanup levels,selecting cleanup actions, and determining compliance. Cleanup levels developed in accordance with regulations may provide some guidance as to the level of concentration of a hazardous substance that may pose a threat to human health and the environment. However,the MTCA regulation makes it clear that exceedances of specified cleanup levels "do not necessarily trigger requirements for cleanup activities"(WAC 173-340-704).In assessing the need for cleanup action, the nature of release, exposure pathways, and the nature of receptors must also be considered. Determining whether a site poses a threat to human health and die environment,and therefore may potentially require a cleanup action tinder MTCA,requires an evaluation of these factors in the context of the cleanup regulations and exercise of professional judgment. The findings and conclusions of this report are 11/14/97 fAPROJECIM:41 017.10\FWINTFAC.RPr 11 11/14/97 FRI 16:15 (TX/RI NO 6566] NOV-14-97 FRI 17:26 LANDAU "DOHA FAX NO. 2069262531 P. 15 DRAFT based on our evaluation of information obtained and reviewed for this project and reflect our professional judgment with respect to that information. Within the limitations of scope,budget,and schedule,Landau Associates has performed the services and made the findings in accordance with generally accepted practices for Phase I ESAs in effect in King County at the time the services were performed. This warranty stands in lieu of all other warranties,express or implied. While this report can be used as a guide,it is neither a rejection nor an endorsement of the site. It must also be understood that changing circumstances in the environment and use of the site can alter the conclusions and findings contained in this report. LANDAU ASSOCIATES,INC. By: Becky J.Bostwick Staff Geologist and William D.Evans,CPG Associate BJB/WDE/djs No.238017.10 11/14/971:\PkOJlier\23$\G17.1O\LwDErpAC ,I. 12 11/14/97 FRI 16:15 (TX/RI NO 6566] NOV-14-97 FRI 17:27 LANDAU ''''OMA FAX NO. 2069262531 P. 16. DRAFT REFERENCES Blanchet, Meg (Environmental Health Specialist, Seattle-King County Department of Public Health). 14 October 1997.Personal communication(telephone interview with Dale Stirling, Heritage North,regarding environmental quality of the subject site and surrounding area). Code Enforcement Technician (King County Department of Development&Environmental Services). 17 October 1997.Personal communication(telephone interview with Dale Stirling,Heritage North,regarding code violations and complaints pertaining to the site). Fallis Thomas (Site owner). 17 October 1997. Personal communication (telephone interview with Dale Stirling.Heritage North,regarding historical uses of the subject property). Goodsell.Gordon(Fire Inspector,Federal Way Fire Department). 10 October 1997.Personal communication (telephone interview with Dale Stirling,Heritage North,regarding the subject site and surrounding area). McKay, Candy (Engineering Aide, King County Department of Natural Resources). 17 October 1997. Personal communication(telephone interview with Dale Stirling,Heritage North,regarding drainage problems in the site area). Noble,Tom(Development Specialist,Federal Way Community Development). 10 October 1997.Personal communication(telephone interview with Dale Stirling, Heritage North,regarding land use activities on the subject site and surrounding area). Polk, R.L. South King County 1997 City Directory. Reviewed at the University of Washington Suzzallo Library,Special Collections. Robinson,Paul(Sanitarian,Seattle-King County Department of Public Health).21 October 1997.Personal communication(telephone interview with Dale Stirling,Heritage North,regarding environmental health issues for the site and surrounding area). Silva,Eros(Mapping Technician,EDR).28 October 1997.Personal communication(telephone interview with Dale Stirling,Heritage North,regarding boundaries of the Commencement Bay/Nearshore Tidcflats Sttperfund site). Washington Department of Natural Resources. Aerial photograph No. 17-053-025. June 18. 1985. 11/14/97 r:\rtto1ern236\n17to\rwr ErFAc.Rpr 13 11/14/97 FRI 16:15 (TX/R% NO 6566] NQV-14-97 FRI 17:28 LANDAU TACOMA FAX NO. 2069262531 P. 17 ----.- .... ` 'd,, gop rl -- '5 • ..-.._ •1 1 tk l� ,x sr , " ^♦ 4 t ter_ .t� .�, .j w - C --' ' 4&141111111 -,4_,Igi y� _ :9 . pci4 0 1.1 7).i.t.,08kk-v i to ,,,„ .z. ii I, a � = f= ,,.1.te,,iri.. e 'l:cp,\*. -=!.. •pc 4 , ,. ' *04,,ilt li b 5:1--(7gki! 7 -X a Ifila. ii(41 :,4Itcbc . “-: • -•4 1 ' h,g,:a:'-'- '1''''''''''': ; J " �" . Z J,,i'' I tti A 0. -. if IF • ,'.i !■.7 6 i It [ 1nil'i� � '0 FONP ml jr. . _. i...„., c. _ -4..,.. '' rol,s,, , m ,7,,,,,t,,,,,,k:2, ,,, . ... ,, , . IN,...*,..*.t. ."-rotltri; - . , :cop yoi N I EE t r -r r �;,,. . , *� , P 'D a-",4,0• 1st; Ler"! , ,7 74,— 4,A" *.' - OliA' MT/Aar *.- . l'- P -a -• ,_ ' '' 'V4,A13 ''' f t IOC. ' ttipp,..,,,,i 1.: .3,-1 PROJECT ,,,,,,„ ' "� Ak er. -- 4 , -- LOCATION '�... ' ' " ..�.«« j,t R _ 1 WM- �L 1 . ot, tztdAripiTkir liERAL " ii friii , , ‘.t4 , . ,4 ‘%1N131 k...tA ,iil -.4, , a .i i'• • .� ■amass n ; �. _, . 1 11 9 : , ... , meg .Zi.,.,.., Er1214111 _ ,, ii A ;it I ,, ::, -I . \riiiiiiii414' 1 4 iiieN ;-411=11 riv, • gC.4!" f"- r i a , *Jot Nitiii.E' , , . . , st N 1 9 A DRAFT 1/2 I iMill # Scale in Miles I i3 0 g s a /1 Vicinity Map _______.,7 Figure 1 11/14/97 FRI 16:15 (TX/RI NO 6566] NW-14-a f till 1 f:a LRNURU TACUfIA FAX NO. 2069262531 P. 18 . L—ri I: ' U CD ED \/ E N S.W. 340TH ST _ ! oc I 0., _ ,Ea] , I .1 2] E=D �. D Drainage 1 Ditch . 1---.3 E6-:_j 9 ; I f:::::::/ s Parcel # S 30890000225 I , - CDa I I I-- ;) 4C-J1 . C51 � I b a A I 0 i :7 . a Approximate Location of B Green Gel Substance e [::::::1 • (---ii-r:1:1 / En m.., çjo 3 S.W. 342ND ST. : O O OU. O 6 r------, nn PI . 0 100 200 O Scale in Feet DRA FT N " 1 Site Plan -- Figure 2 11/14/97 FRI 16:15 [TX/RI NO 65661 ! • I I . I Geotechnical Report SW 34Oth Street Regional Storage Facility I Federal Way, Washington I , I I , . S 1 T '!'13112 February 19, 1998 IPrepared for I City of Federal Way 33530 First Way South Federal Way, WA 98003 ' I --1N i' IPrepared by . Q ASS8 I rAt, )-.--t j'i I LANDAU ASSOCIATES, INC. Wapato Creek Place • 4210-20th Street East, Suite F • Tacoma, WA 98424-1823 • (253)926-2493 TABLE OF CONTENTS Page 1.0 INTRODUCTION 1 1.1 SCOPE OF SERVICES 1 1.2 PREVIOUS REPORTS 2 2.0 PROJECT UNDERSTANDING 2 3.0 EXISTING SITE CONDITIONS 3 3.1 SURFACE CONDITIONS 3 3.2 FIELD EXPLORATIONS AND LABORATORY TESTING 4 3.3 SITE GEOLOGY 4 3.3.1 Advance Outwash 4 3.3.2 Lodgement Till 4 3.3.3 Glacial Outwash 5 3.3.4 Ablation Till 5 3.3.5 Fill 5 3.4 GROUNDWATER 6 4.0 CONCLUSIONS AND RECOMMENDATIONS 6 4.1 GROUNDWATER ISSUES 7 4.2 SITE GRADING 8 4.2.1 Clearing,Grubbing, And Stripping 9 4.2.2 Earthwork 9 4.2.3 Permanent Slopes 11 4.3 INSTALLATION OF NEW UNDERGROUND UTILITIES 12 4.4 CONTROL STRUCTURE 14 4.5 ACCESS ROAD 14 5.0 DOCUMENT REVIEW AND CONSTRUCTION OBSERVATIONS 15 6.0 USE OF THIS REPORT 16 APPENDICES APPENDIX A FIELD EXPLORATIONS APPENDIX B LABORATORY TESTING LIST OF FIGURES Figure Title 1 Vicinity Map 2 Site and Exploration Plan • 3 Slope Detail 4 Toe of Slope Design Alternatives 5 Road and Trench Details 02/19/98 1:\PROJEC11238\017.201SW340DET.FIN Ll LANDAU ASSOCIATES • 1.0 INTRODUCTION This report presents the results of our field investigations and provides geotechnical engineering conclusions and recommendations for design and construction of the proposed SW 340th Street Regional Storage Facility(facility)located near the intersection of SW 342nd Street and 37th Avenue SW in Federal Way, Washington. The primary purposes of this study were to complete subsurface investigations to characterize near-surface soil and groundwater conditions, and develop geotechnical conclusions and recommendations for design and construction of the proposed stormwater detention facility. The project location is shown on the Vicinity Map, Figure 1. The Site and Exploration Plan,Figure 2,shows the project area and the approximate location of the explorations completed for this study. Appendix A presents a description of the field explorations and summary logs of conditions observed in the explorations. Appendix B presents a description of the laboratory testing program and results of the laboratory testing. 1.1 SCOPE OF SERVICES Landau Associates was contracted by the City of Federal Way(City)to provide geotechnical services to support the project. Our services were provided in accordance with the scope outlined in our December 8, 1997 proposal,and the on-call contract between the City of Federal Way and Landau Associates. Notice to proceed was received from the City on December 8, 1997. To support the proposed project, we provided the following specific services: • Reviewed available geologic and geotechnical information in the project vicinity. • Conducted a geologic reconnaissance of the project site. • Excavated five test pits within the proposed footprint of the pond to characterize near-surface soil and groundwater conditions. The test pits were excavated to depths of about 8 to 141h ft below existing site grades with a small-tracked excavator,supplied and operated by SME Construction, Inc. of Tacoma,Washington,under subcontract to Landau Associates. • Completed a boring to a depth of about 20 ft below existing site grade on SW 342nd Street, adjacent to the southwest corner of the property,to install a piezometer for long-term groundwater monitoring. The boring was completed by Tacoma Pump and Drilling of Graham,Washington, under subcontract to Landau Associates. • Attempted two modified percolation tests at test pit locations TP-2 and TP-4. Groundwater levels rose during the required 4-hour soak period. The tests were not completed. • Completed laboratory testing, including natural moisture content determinations on all samples from the explorations. 02/19/98 1:\PROJECT238\0I7.20\SW340DET.FIN 1 LANDAU ASSOCIATES • Completed geotechnical engineering analyses and developed geotechnical conclusions and recommendations for design and construction of the proposed regional stormwater storage facility, including: - recommendations for site grading,including berm construction,suitability of onsite soil for use as fill, recommended gradations for import fill, and compaction criteria per 1996 WSDOT/APWA Standard Specifications - discussion of groundwater issues and potential impacts - recommendations for liner options and design criteria to limit exfiltration of stormwater to reduce potential adverse impacts to groundwater - recommendations for the proposed gravel access road, including subgrade preparation and recommended design section - recommendations for design and construction of the underground drainage pipe along SW 342nd Street, including trenching, foundation support of pipes, pipe bedding material, gradations for trench backfill material, and trench backfill and compaction criteria. The evaluation was based on conditions observed in the test pits and boring at the site, no subsurface explorations along the SW 342nd Street pipeline alignment were included. • Prepared and submitted this geotechnical design report summarizing our findings,conclusions,and recommendations for the project. The report includes a discussion of existing subsurface conditions within the project area, groundwater data, a site plan showing the approximate exploration locations,and summary logs of conditions encountered at the exploration locations. 1.2 PREVIOUS REPORTS Landau Associates completed a Phase I environmental site assessment(ESA)of the property for the City in November 1997. The results of the Phase I ESA are summarized in a report to the City,entitled Draft Phase I Environmental Site Assessment Report, Proposed SW 340th Street Detention Facility, Parcel No. 30890000225, Federal Way, Washington, dated November 14, 1997. Information from that report was incorporated,as appropriate. A draft of this report was provided to the City in December, 1997. 2.0 PROJECT UNDERSTANDING Based on information provided to us,we understand that the project consists of constructing a regional stormwater detention facility with 11.3 acre-feet of storage. The proposed facility is planned to be rectangular in shape,about 150 ft by 550 ft in plan dimensions,with a base elevation of about 382 ft and top elevation of about 391 ft. A one-foot deep channel will meander across the bottom of the pond to facilitate low flow. A small sedimentation pond is planned at the inlet at the south end of the facility,and an outlet micropool at the north end. In addition,a control structure is planned at the north end of the pond to regulate discharge. 02/19/98 1:\PROJEC1R238\019.20\SW340DET.FIN 2 LANDAU ASSOCIATES According to KCM,Inc.(project design firm),water levels in the pond for a 2-year storm will rise to near elevation 386 ft, and be retained for generally less than 12 hours. The maximum water level in the facility,during the 100-year storm, will be near elevation 390 ft, with retention of less 24 hours. An embankment will be required along portions of the eastern and northern sides of the facility to retain water and provide adequate freeboard. A gravel road is planned to provide access to the pond bottom. The roadway will be subject to heavy maintenance equipment, and may occasionally be submerged. Stormwater will be conveyed to the facility from the existing storm drain pipeline(from the south)and by a new pipeline that will extend along SW 342nd Street from the intersection with 35th Avenue SW. Depth of burial of the new pipe is expected to be about 8 ft. The pipe will consist of either RCP or smooth-bore plastic. 3.0 EXISTING SITE CONDITIONS The following sections present a description of existing surface conditions,and a discussion of near- surface soil and groundwater conditions. Our assessment of existing site conditions is based on visual observations and conditions observed in five test pits and one boring completed by Landau Associates in December, 1997. 3.1 SURFACE CONDITIONS The site is currently an undeveloped parcel. It is bounded on the north by SW 340th Street,on the east by residential properties,on the south by SW 342nd Street,and on the west by a construction equipment storage yard. The majority of the site slopes gently downgradient to the east toward a drainage ditch running along the southeastern and eastern margins of the property. Surface water in the drainage ditch was observed to flow toward the north. Surface water runoff generated on the site appears to generally flow toward the drainage ditch; however, there are low areas throughout the site where standing water collects after precipitation events. Vegetation on the site consists of tall grass,blackberry vines,tree saplings,and scattered Scotch broom. Cattails and other water tolerant vegetation are located along the drainage ditch. 02/19/98 1:\PROJECr22381017.201SW340DET.FII4 3 LANDAU ASSOCIATES 3.2 FIELD EXPLORATIONS AND LABORATORY TESTING Near-surface soil and groundwater conditions at the site were explored on December 12, 1997 by drilling a boring to a depth of about 20 ft below existing site grades and excavating a series of five test pits, TP-1 through TP-5, to depths of about 8 to 141 ft below existing site grades at the approximate locations shown on Figure 2. Summary logs of conditions observed in the boring and test pits are presented on Figures A-2 through A-5 in Appendix A of this report. Figure A-1 provides a key to the symbols and terms used on the summary logs. Geotechnical laboratory testing consisted of natural moisture content determinations on all soil samples obtained from the test pits and boring. A description of the laboratory test procedures is summarized in Appendix B of this report. The results of the natural moisture content determinations are shown on the summary logs,Figures A-2 through A-5,in Appendix A. 3.3 SITE GEOLOGY Our understanding of the site geology is based on near-surface soil conditions observed in the test pits and boring completed for this study,review of available geologic information in the project vicinity,and past experience in the project area. Subsurface conditions observed in the test pits completed for this study generally consist of a sequence of surficial fill;and Vashon-age glacial deposits interpreted to be ablation till,glacial outwash,and lodgement till. In boring B-1, the sequence appears to consist of thin deposits of ablation and lodgement till,overlying advance outwash deposits to the depth explored.The soil units observed and reported in the explorations are described below in more detail, from oldest to youngest. 3.3.1 ADVANCE OUTWASH Advance outwash was encountered in boring B-1 beneath the lodgement till. Advance outwash is typically deposited by melt water flowing from a glacier as the glacier advances. The deposit is subsequently overrun by the glacier. Advance outwash encountered in boring B-1 consists of very dense,silty sandy gravel, and extends from a depth of about 12 ft to the bottom of the boring (at a depth of about 20 ft). Advance outwash likely underlies the lodgement till at the site. 3.3.2 LODGEMENT TILL Lodgement till appears to underlie a majority of the site,and was encountered in boring B-1 and test • pits TP-1,TP-3,TP-4,and TP-5. Lodgement till is typically a non-stratified, unsorted deposit of silt, sand, 02/19/98 1:1PROJEC11238'017.20?SW340DET.FIN 4 LANDAU ASSOCIATES • gravel,cobbles and boulders which is deposited beneath an advancing glacier. Lodgement till,locally known as"hardpan,"is typically gray to blue gray,very dense and difficult to excavate. The lodgement till observed in the explorations at the site generally consists of blue gray to gray brown,dense to very dense,silty sand with gravel,with occasional cobbles and small boulders;and very stiff to hard sandy silt with gravel and occasional cobbles. The lodgement till was observed to extend to the bottom of test pits TP-1 and TP-3 through TP-5. Lodgment till was encountered between a depth of about 8 to 12 ft in boring B-1,but was not encountered in test pit TP-2 to the depth explored. 3.3.3 GLACIAL OUTWASH Glacial outwash was encountered in the southern portion of the site in test pits TP-1 and TP-2. The glacial outwash is present above the lodgement till and below the ablation till. Based on the stratigraphic position of the unit,it appears that the glacial outwash was deposited on top of the lodgement till in localized areas by melt water flowing beneath the glacier as it retreated. Where encountered at the site, the glacial outwash generally consists of medium dense to dense, sandy gravel to gravelly sand with cobbles and occasional small boulders. The glacial outwash was observed to be about 4 ft thick at test pit TP-1,and was not fully penetrated at test pit TP-2. 3.3.4 ABLATION TILL Ablation till was observed in all the explorations, and generally overlies the lodgement till, with the exception of test pits TP-1 and TP-2,where glacial outwash was encountered below the ablation till. Ablation till is similar in composition to lodgement till, but was deposited as the glaciers "retreated." Therefore, ablation till is generally less dense than lodgement till. Ablation till is typically red brown, brown or gray brown, medium dense to dense, and can be excavated with conventional hydraulic excavators without significant difficulty. The ablation till observed at the site generally consists of mottled brown and gray,medium dense,silty • sand with varying amounts of gravel. The ablation till was observed in the explorations to vary in thickness from about 3 to 6 ft. 3.3.5 FILL Fill was encountered in all the test pits excavated at the site and likely mantles the entire site. The fill generally consists of loose to medium dense,silty sand,and silty sand with gravel. Fill thickness was observed to vary at the exploration locations from about 1 to 21 feet. 02/19/98 I:PROJECI1238\017.20\SW340DET.FIN 5 LANDAU ASSOCIATES 3.4 GROUNDWATER Groundwater was encountered in the test pits and borings at various depths. In test pits TP-1 and TP- 2,groundwater appears to occur within the glacial outwash deposit overlying the lodgement till. In test pits TP-3 through TP-5,groundwater occurs as a perched layer atop the lodgement till. In boring B-1 groundwater was encountered in the advance outwash below the lodgment till. In upland areas,the occurrence of perched ti groundwater will be highly dependent on rainfall,with maximum groundwater levels occurring in the winter and spring months. The deeper permanent aquifer(s)which presumably exist under the lodgement till at the project location were not investigated as part of this study. Groundwater levels measured in the piezometer installed in boring B-1 are summarized in the following table. GROUNDWATER LEVELS Depth to Groundwater(ft) Boring No. Dec. 16, 1997 Dec. 29, 1997 B-1 5.1 5.3 4.0 CONCLUSIONS AND RECOMMENDATIONS Based on conditions observed during the site reconnaissance,and in explorations completed for the project,construction of the facility is feasible using standard construction equipment and methods,though perched groundwater levels within the volume enclosed by the detention facility will require consideration during construction and to limit potential future instability of side slopes. A discussion of groundwater issues potentially affecting the facility is provided, along with geotechnical recommendations for site grading (including embankment construction, suitability of onsite soil for use as fill, recommended gradations for import fill, and compaction criteria), foundation support of the control structure, new inlet pipe,and for the access road. 02/19/98 1APROJECI1238W17.20'SW340DET.FIN 6 LANDAU ASSOCIATES 4.1 GROUNDWATER ISSUES We understand that current plans call for the side slopes and pond bottom to be vegetated. This will generally preclude the use of a liner(synthetic or soil/bentonite)to prevent groundwater seepage from entering the pond,or exfiltration of water held in the pond to the surrounding ground. In addition,seepage pressure from the pond sides and bottom, when the pond was empty,would likely cause uplift and possible failure of a liner system. We understand that the City plans to construct the pond unlined,and allow groundwater to seep freely into the pond and be carried away by the low flow channel in the pond bottom. The following provides a discussion regarding potential impacts associated with this scenario. Glacial outwash was encountered above the proposed bottom elevation of the pond(approximately 382 ft) in test pits TP-1 and TP-2, excavated in the south portion of the proposed facility. The top of the glacial outwash is estimated to be at about elevation 383.5 ft in test pit TP-1 and about elevation 382.5 ft in test pit TP-2. The lateral extent of the glacial outwash is unknown at this time,but it may extend outward from the site and beneath adjacent properties. The glacial outwash deposits were observed to be water-bearing at the time the explorations were completed(winter 1997). Groundwater should be expected to actively seep from the glacial deposits when the pond is empty,especially during the spring and winter months and possibly during the summer and fall. In addition, advance outwash was encountered in boring B-1 at an elevation of about 380 ft, and extended to the bottom of the boring(elevation 272 ft). Groundwater levels measured in a piezometer installed in boring B-1 during December, 1997 were at about elevation 387 ft. The groundwater level in B-1 suggests possible artesian conditions,which could yield year-round groundwater flow wherever the lodgement till layer is breached. Lastly,a seepage zone at the ablation and lodgement till contact was observed in test pits TP-3 through TP-5, excavated in the central and north portion of the proposed pond. The zone of seepage was generally between about elevation 384 ft to 387 ft at the time of the field explorations. Groundwater should be expected to actively seep from the ablation/lodgement till contact during the spring and winter months, and possibly during the summer and fall months during wetter than normal years. If water was to be held in the pond for an extended period of time, hydrostatic pressure could be transmitted through the permeable glacial outwash deposits for some distance,possibly causing groundwater levels on adjacent properties to rise to a level similar to that of the pond. This could result in flooding of basements(if the basement is lower than the water level in the pond),standing water at the surface(if adjacent surface elevations are lower than the water level in the pond),and increased uplift and hydrostatic pressure on nearby buried utilities. Based on KCM's hydraulic analysis, we understand that the water level in the pond would be at or greater than winter groundwater elevation(assumed at elevation 387 ft), less than 0.02 percent 02/19/98 I:\PROJECI1238\017.201SW340DET.FW 7 LANDAU ASSOCIATES of the design period(approximately 50 years),and when it does,the water would not be retained in the pond at levels above winter groundwater elevation for longer than a few hours. Therefore, it is unlikely that the pond will cause any negative impacts to the surrounding properties under these operating parameters. Allowing groundwater to seep into the pond could result in a lowering of the groundwater table in the • immediate vicinity of the facility. The soil underlying the site is generally in a medium dense to very dense state and we do not anticipate any noticeable ground subsidence occurring in the pond vicinity as a result of this lowering of the groundwater table. 4.2 SITE GRADING Site grading is anticipated to consist of the following elements: • Clearing,grubbing,and stripping • Excavation for the facility • Permanent slopes • Installation of new underground utilities • Subgrade preparation to support a gravel access road. Discussions and geotechnical recommendations are presented in the following subsections for each of the above items. Site preparation and earthwork activities, as well as cost, will be influenced to a major extent by weather conditions. For soil conditions such as those encountered.at the site,site preparation and earthwork activities normally occur during the relatively warmer and drier period between about mid-summer to early fall. Completing these activities outside this normal construction window could lead to a significant increase in construction cost due to weather-related delays,effect of higher groundwater levels on excavations, and repair of areas disturbed by construction activities. In an effort to control earthwork-related construction costs, we recommend that site clearing and grubbing activities occur in late spring to early summer(depending on weather conditions). Given favorable weather conditions,earthwork activities(stripping,grading,etc.)could then begin as early as mid-June,though wet weather conditions can persist into mid-July,which could result in construction delays. Favorable grading weather often lasts into September and sometimes into October; however, by October/November the combination of rain,cooler temperatures and shorter daylight hours typically forces curtailment of most mass • grading operations(with similar types of soil)in the Pacific Northwest. 02/19/98 E:\PROJEC[\238\017.201SW340DET.FIN 8 LANDAU ASSOCIATES 4.2.1 CLEARING,GRUBBING,AND STRIPPING Clearing and grubbing should be in accordance with the requirements in Section 2-01 of the 1998 Standard Specifications for Road, Bridge, and Municipal Construction by the Washington State Department of Transportation(WSDOT)and the American Public Works Association(APWA). Material generated during clearing and grubbing should either be processed onsite and reused in topsoil or as mulch(if possible)during site restoration,or properly disposed of at an approved offsite location. Based on conditions observed in the explorations,estimated average stripping depth to remove sod and topsoil should be in the range of about 2 to 6 inches,though localized stripping depths may be lesser or greater.The sod,topsoil,and/or other organic-rich soil should be stripped to expose the underlying inorganic soil in areas where improvements are to be constructed. Stripped material is not considered suitable for use as structural fill for embankment construction, and should either be stockpiled for use as topsoil or mulch during restoration of the site,or wasted offsite at an approved location. The topsoil at the site appears to have developed on top of an old fill,is generally of poor quality,and may not be suitable for reuse in site restoration. The project's landscape architect should evaluate the quality of the existing topsoil at the site. All incidental excavations associated with clearing,grubbing and stripping should be backfilled in accordance with Section 4.2.2 of this report. 4.2.2 EARTHWORK Following clearing, grubbing,and stripping, site grading is anticipated to consist of excavating the pond, removing any pre-existing fill from beneath embankment areas, and completing embankment construction. We understand that the maximum water elevation in the pond will be about 390 ft. With exception of the drainage ditch along the east boundary of the site,existing surface elevations range from about 393 ft at the southwest corner of the site to about 388 at the northeast corner of the site, based on the topographic map provided by the City. Bottom elevations of the drainage ditch are shown on the City topographic map,to vary from about 387.5 ft at the culvert extending beneath SW 342nd Street,to about 382 ft where it enters the culvert extending beneath SW 340th Street. With a proposed top elevation of embankment at about 391 ft, new embankments of up to about 4 to 5 ft in height above existing ground surface elevations will be required along portions of the pond to retain the maximum water elevation of about 390 ft within the pond. To limit possible seepage through the embankments,the embankments should be constructed of either relatively low permeable soil,or admixtures, such as bentonite/Portland cement, should be considered to reduce permeability. If admixtures are used to reduce permeability, the embankment soil should have a hydraulic conductivity in the range of 10"5 to 10-6 cm/sec. 02/19/98 1:\PROJECT1238\017.20\SW340DET.FIN 9 LANDAU ASSOCIATES The ablation and lodgement till,and the existing fill at the site is of generally low permeability and would be suitable for use as fill to construct embankments, provided the soil can be properly moisture- conditioned and compacted to the required density. Fill containing organic matter, debris, and other deleterious material will not be suitable for reuse,and when encountered,should either be stockpiled for use during site restoration,or wasted at an approved location. Because of the relatively high permeability of the glacial outwash deposits, that soil should be throughly mixed with the siltier site soil and/or blended with bentonite/Portland cement before it is used as fill. The existing fill,ablation and lodgement till,and glacial outwash observed in the test pits is generally wet for the typical range of optimum moisture content for these soil types. Therefore,drying of the soil will likely be necessary in order to achieve proper compaction. If site soil cannot be properly moisture-conditioned and compacted,or if there is not enough site soil to construct the embankments, imported structural fill will be needed. Imported structural fill should be of relatively low permeability(but free of clay);free of trash, wood waste and organics,and/or other deleterious material;be within about 1 to 2 percent of the optimum moisture content;and meet the gradation requirements in the table below. RECOMMENDED GRADATION FOR IMPORT FELL Percent Passing, U.S. Sieve Size by Dry Weight 4 inch 100 No.4 95 -60 No.60 65 -30 No. 200 40-20 Prior to placing embankment fill, the exposed subgrade should be cleaned of organic-rich soil, unsuitable fill, debris and loose and/or disturbed soil, moisture-conditioned and compacted to at least 95 percent of the maximum dry density.Embankment construction should be in accordance with the requirements of Section 2-03.3(14)B,and compaction should meet the requirements of Section 2-03.3(14)C,Method C of the 1998 WSDOT/APWA Standard Specifications. The maximum dry density and optimum moisture content should be determined in accordance with Section 2-03.3(14)D of the 1998 WSDOT/APWA Standard Specifications. Alternatively,the maximum dry density and optimum moisture content of the embankment material could be determined using the ASTM D1557 test procedure. 02/19/98 I.•\PROJECI1238'A17.201SW340DET.FIN 10 LANDAU ASSOCIATES To provide lateral sliding resistance,the base of the embankment should be keyed into the existing subgrade as shown on Figure 3. The top width of the embankments should be a minimum of 5 ft. The ablation and lodgement till,existing fill at the site,and the recommended import fill contain a significant amount of fine sand and silt,which will make these soil types moisture sensitive. The ablation and lodgement till, existing fill, and import fill (and possibly the glacial outwash) in either a compacted or uncompacted state will degrade quickly to a slurry-like consistency in the presence of water and construction traffic. Therefore,we recommend that grading activities occur during the normally warm,dry summer months. If the soil becomes loosened and/or disturbed, additional excavation to expose undisturbed soil and replacement with properly compacted structural fill may be required. The contractor may reduce the potential for disturbance by the following: • Suspending earthwork activities during wet weather • Limiting construction traffic over unprotected soil • Providing gravel "working mats" • Sloping excavated surfaces to promote run-off • Sealing the exposed surface by rolling with a smooth drum compactor or rubber-tire roller at the end of each working day and removing wet surface soil prior to commencing grading each day. 4.2.3 PERMANENT SLOPES With proper control of groundwater seepage,permanent excavation slopes on the interior of the pond may be constructed as steep as 2H:1 V. With embankment construction as recommended in Section 4.2.2 of this report, interior and exterior embankment slopes may also be constructed as steep as 2H:1 V. Recommendations for permanent slopes are illustrated on Figure 3. Groundwater seepage will likely occur during the wetter portions of the year(which is generally October through April)along the contact of the ablation and lodgement till in the central to north portion of the facility,and from the glacial outwash deposits at the toe of the slope in the south portion of the facility. Uncontrolled seepage at the ablation tillglacial till contact could result in erosion and localized slumping of the slope face and/or topsoil on the slope face above the contract. In addition,uncontrolled seepage from the glacial outwash near pond bottom in the south portion of the facility may also cause erosion,undermining, and/or localized slumping of the side slopes on the pond. Groundwater seepage from the pond side slopes could be controlled by: 1)constructing a slope drain; or 2)constructing a gabion wall along the toe of the slope to provide lateral support and allow for drainage. Both of these alternatives are illustrated on Figure 4. The slope drain would consist of a minimum of a 12-inch thick layer of quarry spalls encased within a nonwoven geotextile,covered with 12 inches of topsoil. Quarry 02/19/98 1:\PROIEC11238\017.201SW340DET.FIN 1 1 LANDAU ASSOCIATES spalls should meet the requirements in section 9-13.6 of the 1998 WSDOT/APWA Standard Specifications, though the maximum particle size should be reduced to 4 inches. The geotextile should meet the requirements in Table 1, Moderate Survivability and Table 2, Class A in Section 9-33.2 of the 1998 WSDOT/APWA Standard Specifications. The drainage layer should be keyed into the toe of the slope as shown on Figure 4, and should extend a minimum of 18 inches above the seepage zone. Depending on the anticipated maintenance schedule for sediment removal,the civil engineer may want to consider adding perforated drain pipes within the drainage layer to facilitate drainage in the event that sediment clogs the toe of the drainage layer. The pipes should daylight just under the base of the topsoil layer. A spacing of 20 to 30 ft on center would likely be appropriate. Based on conditions observed in the test pits,the seepage zone at the contact of the ablation and lodgement till (central and north portion of the pond) was encountered between about elevation 384 ft to 387 ft,and the seepage zone from the glacial outwash deposits was encountered between about the pond bottom to about elevation 383 ft to 384 ft. Therefore,the drainage measure may need to extend up the slope to elevation 388 to 389 ft. Alternatively, 3 ft by 3 ft gabion baskets (one to two tiers) could be placed at the toe slope and extended vertically to above the seepage zone. A nonwoven geotextile, meeting the requirements in Table 1, Moderate Survivability and Table 2, Class A in Section 9-33.2 f the 1998 WSDOT/APWA Standard Specifications, would be placed on the backside and below the base of the gabion baskets to prevent piping of soil through the gabions, as shown on Figure 4. Gabions should be constructed in accordance with the requirements in Section 6-09.3 and 9-27.3 of the 1998 WSDOT/APWA Standard Specifications. The gabion baskets should be founded on undisturbed native soil and be embedded at least 12 inches below the pond bottom. Permanent cut or fill slopes should be provided with proper erosion protection and be re-seeded and/or re-vegetated as soon as practical to limit erosion. It should be noted that vegetation planted over the slope drain may not receive adequate moisture during the drier portions of the year. The landscape architect should consider this when selecting vegetation for planting above the slope drain. 4.3 INSTALLATION OF NEW UNDERGROUND UTILITIES We understand that an inlet pipe will be constructed along SW 342nd Street from 35th Avenue SW to the facility. Maximum trench depths are expected to be 8 ft or less. Based on conditions observed in the explorations completed at the site,it is expected that soil conditions that will be encountered in the trench zone (up to 8 ft below street grades)will consist of medium dense ablation till over dense to very dense lodgement till, though zones of fill and glacial outwash may also be present. Groundwater should be expected and dewatering will likely be required to install the pipe,particularly if the work is done during the wetter portions 02/19/98 I:\PROJECT1238WI7.201SW340DET.F1N 12 LANDAU ASSOCIATES of the year. A tracked hydraulic excavator with sufficient reach should be able to excavate to the required trench depth without difficulty. Trenches deeper than 4 ft should be provided with adequate shoring, such as a trench box, or be properly sloped. In the absence of groundwater seepage,the ablation and lodgement till would be classified as Type B,and the glacial outwash and existing fill would be classified as Type C[Washington Administration Code(WAC)296-155-650 through 296-155-66411]. If groundwater is present,all soil within the trench zone would be classified as Type C. Surcharge loads on excavation support systems due to construction equipment, stockpiled material, and vehicle traffic should be included in the design of any anticipated shoring system. Actual trench configurations should be the responsibility of the contractor. All applicable local, state, and federal safety codes should be followed. All open cuts should be monitored by the contractor during excavation for any evidence of instability. If instability is detected,the contractor should flatten the side slopes or install temporary shoring. If the trench bottom becomes disturbed during excavation,but the bottom of the trench is maintained in a dry condition,the disturbance may be repaired by recompacting the subgrade. If the disturbed material becomes wet and is subject to construction traffic, it may become loose and unstable. Compaction of wet material will be difficult without drying of the soil; therefore, wet and disturbed soil should be removed to expose the underlying undisturbed soil and replaced with foundation material conforming to the requirements for Crushed Surfacing Base Course (CSBC) in Section 9-03.9(3) of the 1998 WSDOT/APWA Standard Specifications. Foundation material should be compacted to at least 90 percent of the maximum dry density as determined by Section 2-03.3(14)D or by the ASTM D1557 test procedure to provide a firm trench bottom. To provide uniform foundation support, pipes should be underlain by at least 4 inches of bedding material. Bedding material for rigid pipes should conform to the requirements of Section 9-03.15 of the 1998 WSDOT/APWA Standard Specifications, and bedding material for flexible pipes should conform to the requirements of Section 9-03.16 of the 1998 WSDOT/APWA Standard Specifications. Bedding material should be compacted in accordance with 7-10.3(9) 1998 WSDOT/APWA Standard Specifications. After placement of the pipe,the initial backfill in the pipe zone for flexible pipes should consist of the same bedding material placed to a height of at least 6 inches over the crown of the pipe. For rigid pipes,the initial backfill should extend at least to a height of 0.15 ft times the pipe diameter(in inches). The initial backfill should be brought up evenly around the pipe in relatively horizontal lifts not exceeding 6 inches,and worked under the haunches of the pipe with a shovel, vibration,or other approved procedure. Each lift should be thoroughly compacted in accordance with 7-10.3(11)of the 1998 WSDOT/APWA Standard Specifications. The excavated material from the trench will likely consist of soil previously described in this report, and may be reused as trench backfill, provided the material is free of organic matter and large debris,and is 02/19/98 t:\PROJECll2381017.201SW340DET.FIN 13 LANDAU ASSOCIATES properly moisture-conditioned(dried)to near optimum moisture content. Natural moisture contents of soil samples recovered from the test pits were generally above the typical range of optimum moisture content; therefore,drying of excavated material may be necessary to achieve the required compaction. If the excavated trench material cannot be used for backfill, then backfill should consist of imported fill. For dry weather conditions,imported fill should meet the requirements for Bank Run Gravel for Trench Backfill in Section 9- 03.19 of the 1998 WSDOT/APWA Standard Specifications. If wet weather construction is anticipated,then the amount of fines in the trench backfill should be limited to 5 percent or less of the material passing a 3/4- inch sieve. If heavy compaction equipment is to be used to compact the trench backfill, then the first lift of backfill above the initial backfill for flexible pipes should not be compacted until it has been placed to a height of 18 inches above the crown of the pipe. Subsequent lifts should be placed in relatively horizontal lifts not exceeding 8 inches loose thickness. Trench backfill should be compacted in accordance with Section 7- 10.3(11)of the 1998 WSDOT/APWA Standard Specifications. In undeveloped areas,trench backfill should be compacted to between 85 and 90 percent of the maximum dry density. Figure 5 provides a typical trench detail. 4.4 CONTROL STRUCTURE Adequate foundation support for the control structure can be provide by the undisturbed native soil. A maximum allowable net soil bearing pressure of 4,000 psf would be suitable for the undisturbed native soil. In addition, we recommend that a minimum 6-inch thick leveling course of compacted CSBC, as specified in Section 9-03.9(3) of the 1998 WSDOT/APWA Standard Specifications, be placed beneath the control structure. The CSBC should be compacted to 95 percent of the maximum dry density as defined in Section 4.2.2 of this report. 4.5 ACCESS ROAD We understand that an access road is planned into the pond to allow periodic maintenance. The anticipated construction sequence will consist of rough grading (cut and/or filling) to establish the road subgrade elevation; preparing the road subgrade by scarifying, moisture-conditioning, and compacting the subgrade to 95 percent of the maximum dry density; and pacing of the surfacing material. If there is a significant time lag between subgrade preparation and placement of the surfacing material,then we recommend that prior to placement of the surfacing material, the access road subgrade be proof-rolled to check for the presence of soft, loose,and/or disturbed areas. If any of these conditions are revealed during proof-rolling, these areas should either be moisture-conditioned and recompacted to the required density,or removed and 02/19/98 1:\PROIEC112381017.201SW340DET.FIN 14 LANDAU ASSOCIATES replaced with suitable soil and compacted to the required density. The final surface should be firm and non- yielding. It is assumed that equipment using the access road will likely consist of a front loader and/or backhoe and a dump truck. For portions of the roadway above normal operating water levels in the pond,a thickness of 6 inches of compacted CSBC over the compacted subgrade should provide adequate support of the anticipated equipment during pond maintenance activities. Below the normal operating water level in the pond,we recommend the surfacing consists of a 12-inch layer of quarry spalls with a 2-inch thick surface layer of CSBC. This should provide a more durable surface if the pond bottom needs to be accessed during periods when the pond is active. The City should assume that periodic maintenance, consisting of regrading and recompacting of the CSBC,and occasionally adding additional CSBC,will be required to maintain the access road. Crushed surfacing base course should meet the requirements in Section 9-03.9(3) of the 1998 WSDOT/APWA Standard Specifications and be compacted to at least 95 percent of the maximum dry density. Quarry spalls should meet the requirements in Section 9-13.6 of the 1998 WSDOT/APWA Standard Specifications. Quarry spalls should be compacted by with making several passes with a large,self-propelled vibratory compactor to product a firm and non-yielding surface. Typical details of the access road are shown on Figure 5. 5.0 DOCUMENT REVIEW AND CONSTRUCTION OBSERVATIONS We recommend that a qualified geotechnical or civil engineer review those portions of the plans and specifications that pertain to earthwork construction to determine if they are consistent with the recommendations presented in this report. We also recommend that monitoring,testing,and consultation be provided during construction to confirm that the conditions encountered are consistent with those indicated by our explorations,to provide expedient recommendations should conditions be revealed during construction that differ from those anticipated,and to evaluate whether geotechnical-related activities comply with project plans and specifications, and the recommendations contained in this report. Such activities include site grading, subgrade preparation, fill placement and compaction, and other geotechnical-related earthwork activities. Landau Associates would be pleased to provide these services. 02/19/98 1:\PROJEC112381417.201SW340DET.FIN 15 LANDAU ASSOCIATES 6.0 USE OF THIS REPORT This report was prepared for the exclusive use of the City of Federal Way, Washington and their design consultant for specific application to this project. Use by others is at their sole risk. The findings, recommendations,and opinions presented herein are based on field explorations and observations made during our study. Within the limitations of scope, schedule, and budget, the analyses, conclusions, and recommendations presented in this report were prepared in accordance with generally accepted professional geotechnical engineering principles and practices in this area at the time this report was prepared. We make no other warranty,either express or implied. We appreciate the opportunity to provide these services and look forward to assisting you in the future. Please contact the undersigned if you have any questions regarding the information contained in this report. 9 J• LANDAU ASSOCIATES,INC. 1p�, 27805 �� ww �, �''ISTE4 `QI�NAL Ets , Edward J.Heavey,P.E. Senior Engineer EXPIRES • -pq, Ian and William D. Evans,CPG Associate EJH/WDE/djs No.238017.20 02/19/98 I:\PROiEC11238\017.201SW340DET.FIN 16 LANDAU ASSOCIATES • LA o:r sr -"Pe sll 300 - 0 84 ' 1. >F ! ''yb er _ it L ]OISt SiS :s_ _ d31 2101 !FI r f. / �1 y - " '' I304 Si SM A 31 N — _ SW TN ST • _ IP00 a . 1PSM R l ,,, w nml r-!, QO ate. + J. NA � ttt��: � t e,� g �Ny 4 ► s noTN i ,74 /Mi b tr �. 0 R : It; ..4}� •. 913tsOn Al 314111 Pl All �,, V Jf $• ., - 4: . '�'-n ; • DE �s sit u. ;_ " poli5"._et At . ?' ; o``r iJ4 Mr ` ` l J�f. �'t 9 r r mL Piii ' y , �■� ■ Vim. alir` M.o.. :� �' a6 IS . �.+ * ,#* ti4S, .,... it CIF '!1 „ :. {."'' SW 322No Sr 4s >m.:t _ sr "wIELITFifilftrt''..._ 1,, ' ' LP' t d(. .� a.�' y e�' `, 7MEM .Ttt- Y , 32210 ST C ��y t tit 1.0 IlY / 4 1FiZ 4 V y 1 A,/F.��1I]`- �2 1 K 1-i .. y r -r ilk. 111 ..rar a, `I� sr -r rkt�mAQ `� „10 . f- iiiiii WM".• RCE �1 .� !I,., .4.4.4 .4. / owir...v, ,, „ tt ome, _ �lK `L Y i� un 1 •1 PROJECT1 N :-,m4dre ' �. P . :ec ,e d ` .r . PINT .,:. r r '9° , LOCATION 1 d S1+ 336TH i 5T 4 `.ct�sr d.s sue J �" ♦ , t r •a SM 3 NE — ::r:�=� et i ` tr =,T FE ii ERAL m.4 ` s,oT►1 d 4, S, 4 uMSt PC ip� iz a , C , , Q [T d �� ^'.� 43RD ST NE- 1. d 00 . 1 '�' c� QN. , 19 a ill ` xYNT It,F 2 �2,1p S`T__ ', , i 16' 1 r' •�.1 sr r. AA S •monist 41.r ST NE i NFrans l o t SN 34i'm E ST SM 344TN , Sy Al.t. 9 4 MAX ,��1,c m M1 tiORTN nr.s,�"900 W N00 ]000 =J wn w ,� 1 .._ 4M d 9, l< 4C - �•1 �, C < ,�.�I" S7l 346nt ST N 1 d rlM� 3KIN STD St1 i A J SNORE I p . ,J !ad 9l H6M PL 2100 w A'. -C F 4 Sie LL drMNi g �; GOLF IL 1E .M t d ` M s €d D B St 111333�� 'JI al' 347111 ST 3 ,g •? '�' 24,1,..4 ' ;. COURSE Offif—s" M sr _'� + _s+ T -` '� l s o P >,TiN a ,• m �� ` �2 `° �, 1i i 1i �c.-< 91]IBM 1. n. • u. m s6 4. a I \1 t ...' ,o. y ...mu e, r• ;4 O. 9. u) m 0 rn m cc m Jr) s 0 1/2 1 m mtimmilisimminimimme Scale in Miles 3 m LL r U 0 N n ,s m m N FAI Vicinity Map Figure 1 I U ..___, c _,......i ...„, 2 N S.W. 340TH ST, O LEGEND ri Approximate Test i Pit Location 9 Approximate CID EZD Boring Location TP-4 IE-,1,3 f1m I LI DrainageIZil Ditch 2:jci N � 1=2:7 -5 N TP-3 I t 0 ,I in ir N 0 43 N C 1:1 n I Q =1 SI TP-5 i Qill -R-mc C53 u a I. o ea 4 in a TP—2 73 0 I B ED igEZ=1a H TP—� t s B-1 N _ S.W. 342nd St 0 7 Cq O ° O 0 Di IP -.5 ., /-----7c-t-, 0 100 200 N n a N Scale in Feet F/1 Site and Exploration Plan Figure 2 t) a) L 0 a+ L: i , • .41-, w 0 Xin e\ oa > — �\ r aw N C M 4 .. [ in >. 0 f Y N c •\� O Ca) \, to E • c 0 E 03 w cn N N N L Z v r' n o, 0 n i N n N r 0 0 0 c N 0 c c O O t 0 N N Y 0Cfl r3 C 0 3 N C E coE0 p +, o � E 8 ."r o N 3 0 p E N Li. v• li N p COXXin O C N C a > N o _ moo a a Qw 0 U (n O n 0 m M O N 12" Topsoil 2 00 .• 18" Min. oop gip'' Seepage Zone Pond Bottom .. o 12 Min. oo��J�YJj` Quarry Spoils ,1\/.\X12" <i4QO <',.. .�\\i. Min. •�;v� •, v•� � (12" Min.) Geotextile Alternative A Slope Drain (Not to Scale) 03 N Quarry Spans12" Topsoil 2 2-3'X3' 1 Gabion Baskets a . iP.:Pi i •• Off:°. Zone �:0• /Seepage / Pond Bottom • 12" Min. ' Geotextile 6 T Alternative B Gabion Toe $ (Not to Scale) 1 y O N1 O N Toe of Slope Design Alternatives Figure 4 Slope as O Slope as Required 6' Min. =iiiiii i € i€ Required Pipe 4 Notes: 1. Foundation Material, CSBC, Section 9-03.9(3) 1998 WSDOT/APWA Standard Specifications. 2. 4 inches minimum bedding material: Rigid pipe: Section 9-03.15, 1998 WSDOT/APWA Standard Specifications Flexible pipe: Section 9-03.16, 1998 WSDOT/APWA Standard Specifications 3. Initial backfill, 6—inches above crown, same material as bedding. 4. Trench backfill Alternative A N Trench Detail (Not to Scale) 6" Compacted CSBC 0 2 Compacted Subgrade Access Road Detail s No Submergence (Not to Scale) 2" Compacted CSBC Compacted Quarry Spalls g vo�S(f�sfS:Cfs6�S" .!(-44 5 f•4KS:0 Slope as Required 0:o.:o4 p o:640:o:oop:o.:P40:o:oop o .•o• 0 1 Min. !3:°Q�:�.oO.:p.oO.:�.oQ.:p.oO..p. Q..p.o . 3 !"1:ni`c• 1.fL :;.. `nn.:..f1;P( r?...,: QrX:..:.(1:en. 11:on• ° Compacted Access Road Detail Subgrade Pond Bottom (Not to Scale) 111 N Road and Trench Details Figure 5 APPENDIX A Field Explorations • APPENDIX A FIELD EXPLORATIONS Field explorations were conducted at the site on December 12, 1997 by drilling a boring(B-1)to a depth of about 20 ft below existing site grades and excavating a series of five test pits,TP-1 through TP-5,to depths of about 8 to 141 ft below existing site grades at the approximate locations shown on Figure 2. The boring was drilled by Tacoma Pump and Drilling, Inc. (subcontracted to Landau Associates) with a truck- mounted Mobile B-61 drill rig advancing hollow-stem augers. The test pits were excavated by SME Construction, Inc. of Tacoma, Washington (subcontracted to Landau Associates) with a track-mounted excavator. Exploration locations were determined in the field by taping and pacing from existing site features. Elevations at the exploration locations were estimated based on the topography shown on topographic drawings,Sheets 1 through 4,prepared by Earth Tech,and dated October, 1997. Geotechnical field logging of subsurface and drilling conditions was carried out by a geologist from Landau Associates who continuously observed the explorations and coordinated the field work. Representative soil samples from the test pits and borings for geotechnical evaluation were placed in plastic bags, sealed, labeled, and transported to our laboratory for further examination,classification,and testing. Soil samples from the borings were obtained at a 5-ft depth interval to the bottom of the borings. Soil samples from the borings were obtained with a 2-inch outside diameter(O.D.)split-spoon sampler driven 18 inches(or a portion thereof)with a 140-pound,downhole hammer on a wireline with a manual release,dropped from a height of 30 inches. The number of blows for each 6 inches of penetration(or portion thereof)was recorded on the field logs. The number of hammer blows to drive the split-spoon sampler the last 12 inches(or portion thereof)of the 18-inch drive is shown on the summary logs in this appendix. This blow count provides a qualitative measure of the relative density of cohesionless soils and the consistency of a cohesive soil. Upon completion of logging and sampling, the test pit excavations were backfilled with excavated material. A standpipe piezometer (well) was installed in the boring for subsequent groundwater depth measurements. A flush-mounted surface monument cover was installed over the piezometer to protect it from vandalism. Details of the piezometer construction are shown on the summary log. The area surrounding the explorations was restored as best as possible with the equipment on hand. All soil encountered in the explorations was described using the soil classification system presented on Figure A-1, and in general accordance with ASTM D2488 Standard Recommended Practice for Description of Soil(Visual-Manual Procedures). The subsurface conditions are described in summary logs on Figures A-2 through A-5. Information presented on the summary logs depicts subsurface conditions only at the specified location and at the date designated on the log. Soil and water conditions at other locations may differ and changes may also result with the passage of time. 02/19/98 1:\PROJEC[3238M)17.20\SW340DET.FIN A-1 LANDAU ASSOCIATES SAMPLE DISPOSAL Soil samples obtained from the explorations will be stored in our laboratory for 30 days after the date of our final report. After that date, the samples will be disposed of unless arrangements are made to retain them. 02/19/98 I:\PROJECI12381017.201SW340DET.FIN A-2 LANDAU ASSOCIATES Soil Classification System uses MAJOR GRAPHIC LETTER TYPICAL DIVISIONS SYMBOL SYMBOL(1) DESCRIPTIONS(2X3) CLEAN o0 0 00‘ Well-graded gravel; grovel/sand mixture(s): GRAVEL AND GRAVEL o po i GW little or no fines LI o. o Poorlyroded ravel: ravel san . o GRAVELLY SOIL (Little or no fnes) o 00 0-1 GP 9 9 9 / d mixture(s); .$. (More than 50% • . little or no fines -' o of roarseretried oo ion GRAVEL WITH FINES ]/ l 9' GM Silty gravel; grovel/sand/sat mixture(s) �, E (Appreciable .. , " • z�0e Q No.4 sieve) amount of fnes) •moo•o GC Ooyey gravel; grovel/sand/day mixture(s) A5S c ti Z SAND AND CLEAN SAND SW Well-graded sand; gravelly sand; little or no fines SANDY SOIL (Little or no fines) SP Poorly graded sand; gravelly sand; little or no fines 8 X (More than 502 of coarse fraction SAND WITH FINES I I I I I I SM Silty sand; Bond/sat mixture(s) passed through (Appreciable amount No.4 sieve) of fines) SC Clayey sand; sand/day mixture(s) .e I I ML I Inorganic sit and very fine sand; rock flour, silty or s. 1/J clayey fine sand or clayey silt with slight plasticity o b SILT AND CLAY CL Inorganic clay of low to medium plasticity; gravelly ' gi E g (Liquid Limit less than 50) cloy; sandy doy; silty day, lean day c OL Organic silt; organic, silty day of low plasticity N R.A2 MH Inorganic sat; micaceous or diatomaceous fine sand I 2 r or sky sal Is SILT AND CLAY CH Inorganic cloy of high plasticity; fat day S (Liquid Limit greater than 50) � ffe OH Organic day of medium to high plasticity, organic sat HIGHLY ORGANIC SOIL �.. PT Peat; humus; swamp soil with high organic content OTHER %i��% /AC/PC Asphalt Concrete Povement/Portlond Cement Pavement Notes: 1. USCS letter symbols correspond to the symbols used by the Unified Sol Classification System and ASTM Classification methods. Dual letter symbols(e.g.. SM-SP) for o sand or gravel indicate a soil with an estimated 5-15%fines. Multiple letter symbols(e.g.,ML/CL) indicate borderline or multiple son dossificatians. 2. Son classifications ore based an the general approach presented in the Standard Practice for Description and Identification of Sods /Visual-Manual Procedural as outlined in ASTM 02488. %ere laboratory index testing has been conducted. son dossifications are based on the Standard Test Method for Classification of Sods for Engineering Purposes as outlined in ASTM 02487. 3. Soil description terminology is based on visual estimates(in the absence of laboratory test dote) of the percentages of each sail type and is z defined as follows: Primary Constituent: >50% - "GRAVEL: "SAND," "SILT," "CLAY," etc. Secondary Constituents: >30%and S50% - "very gravelly," 'very sandy" "very silty," etc. s >15%and S30% - •gravelly" "sandy" "saty," etc. i Additional Constituents: >52 and S15X - "with grovel." with sand," "with sit: etc. t 55X - "trace gravel, "trace sand," "trace silt: etc.. or not noted. C. a Key SAMPLE NUMBER & INTERVAL SAMPLER TYPE aCode Description Recovery Depth Interval a 3.25-inch 0.0., 2.42-inch 1.0. Split Spoon Sampler 2.00-inchb 0.0.. 1.50-inch 1.0. Split Spoon Sampler N Sample c Shelby • Identification—6.1 �J] Sample Depth Interval d Crab Sample Number -�' e 3.00-inch 1.0. Care Bard Sampler T. Portion of Sample Retained 1 300-lb Hammer. 30-inch Drop S for Archive or Analysis 2 140-lb Hammer. 30-inch Drop LL a 3 Pushed ✓ 4 350-Ib. Hammer, 30-inch Drop u TEST DATA OTHER Code Description Q Approximate Water Elevation At Time of Drilling (ATO) AID or On Date Noted r1Soil Classification System and Key Figure A-1 B-1 SAMPLE DATA SOIL PROFILE WELL DETAIL m 2 > c r E Drilling Method: Hollow Stem Auger — 8„ y u- a ul Protective Well 5 n_ n a n c Ground Elevation (ft): 392 Monument o a o c o 0 10 ai Locking Waterproof o rn.e rn m 0 0 m Well Seal - SM Gray, mottled with brown, silty fine to medium , 4. - - SAND with clay and trace fine to medium gravel d—Cement - (dense, moist to wet) (ablation till)_ _ / / Schedule 40 PVC Pipe _ —5 1 ! 2b 27 14 — Bentonite Chips _ SM Brown with some gray, silty, fine SAND with fine gravel and trace clay (very dense, - — 10 2ip 2b 80 15 wet) (lodgement till) 7 _ = ---" 1-inch Diameter Schedule 40 PVC Screen ' ,3 GM Brown, silty, sandy, fine to coarse = (0.01-inch Slot Size) _ '0 GRAVEL with trace clay (very dense, wet) _ 1 (advance outwashl _ 3 M 2b 115 14 �p _ —15 10„ i ' — —10-20 Sand Pack — 4 • 2b t0 15 r .kH111 • 1. Threaded End Cap - —20 — a_ Boring Completed 12/12/97 Well Completed 12/12/97 Total Depth : 20.0 ft. - - y- E-25 — m- o- m- ,f',-30 — 3 1 N 1 3 a 1 LL O i cS Notes: 1. Strali ra tic contacts are based on field interpretations and are ap proximate.p pr Refer to the R text for an explanation of subsurface conditions. 0 2. Refer to 'Soil Classification System and Key' figure for explanation of graphics and symbols. o a ,l - ` Boring 8-1 Figure A-2 TP-1 (Approximate elevation 391.5 ft) Unified Soil Classification Sample Moisture Depth System No./Depth Content (ft) Symbol Description (ft) (%) 0.0-2.5 SM Dark gray with brown,silty,fine to medium SAND with clay(medium dense,moist)(fill) 2.5-8.0 SM Gray, mottled with brown,silty,fine to medium SAND with clay and occasional fine to medium gravel(medium dense,moist)(ablation till) 8.0-12.0 GM Gray,silty,sandy,fine to coarse GRAVEL (medium dense,wet)(glacial outwash) 12.0-14.5 SM Gray,silty,fine SAND with fine to coarse gravel TP-1/12.5 12 and trace clay(very dense,very moist) (lodgement till) Test pit completed to 14.5 ft on December 12, 1997. Heavy groundwater seepage encountered at 8 ft. TP-2 (Approximate elevation 390.5 ft) Unified Soil Classification Sample Moisture Depth System No./Depth Content (ft) Symbol Description (ft) (%) 0.0-2.0 SM Dark gray brown and orange brown,silty,fine to medium SAND and occasional roots and fine to coarse gravel(medium dense,moist) $ (fill) c 2.0-8.0 SM Gray with brown mottling,silty,fine to medium SAND with clay and occasional fine to coarse gravel(medium dense,moist)(ablation till) 8.0-9.0 GM Gray,silty,sandy,fine to coarse GRAVEL LL s (dense,moist to wet)(glacial outwash) in Test pit completed to 9.0 ft on December 12, 1997. Light groundwater seepage encountered at 8 ft. 0 N I � Note: Stratigraphic contacts are based on field interpretations and are approximate. Refer to the text for an explanation of subsurface conditions. Refer to Soil Classification System figure for additional information on symbols and terminology. Log of Test Pits Figure A-3 TP-3 (Approximate elevation 389.5 ft) Unified Soil Classification Sample Moisture Depth System No./Depth Content (ft) Symbol Description (ft) (%) 0.0-1.0 SM Dark gray with brown,silty,fine to medium SAND with clay(medium dense,moist)(fill) 1.0-5.0 SM Brown,mottled with gray,silty,fine to medium SAND with clay and traces of fine to coarse gravel(medium dense,moist)(ablation till) 5.0-12.0 SM Brown with some gray mottling,silty,gravelly,. fine to medium SAND(very dense,moist) (lodgement till) 12.0-12.5 SM Blue gray,silty,fine to medium SAND with TP-3/12.0 6 clay and fine to coarse gravel(very dense, moist)(lodgement till) Test pit completed to 12.5 ft on December 12, 1997. Light groundwater seepage encountered at 5 ft. TP-4 (Approximate elevation 389.0 ft) Unified Soil Classification Sample Moisture Depth System No./Depth Content (ft) Symbol Description (ft) (%) 0.0-2.0 SM Brown,mottled with gray,silty,fine to medium SAND with clay(medium dense,moist)(fill) 2.0-5.0 SM Gray,mottled with brown,silty,fine to medium SAND with trace clay,occasional fine to coarse gravel(medium dense,moist) (ablation till) 0 5.0-8.0 SM Brown with gray,fine to medium SAND with TP-4/8.0 10 LL silt,clay and fine gravel(very dense,moist) (lodgement till) Test pit completed to 8.0 ft on December 12, 1997. r; Light groundwater seepage encountered at 5.0 ft. 0 N Note: Stratigraphic contacts are based on field interpretations and are approximate. Refer to the text for an explanation of subsurface conditions. Refer to Soil Classification System figure for additional information on symbols and terminology. FrA Log of Test Pits Figure A-4 • TP-5 (Approximate elevation 390.0 ft) Unified Soil Classification Sample Moisture Depth System No./Depth Content (ft) Symbol Description (ft) (%) 0.0-1.5 SM Dark gray,silty,fine to medium SAND with clay (medium dense,moist)(fill) 1.5-3.0 SM Brown,mottled with gray,silty,fine to medium SAND with clay(medium dense,moist) (ablation till) 3.0-6.0 SM Brown,mottled with gray,silty,fine to medium SAND with fine to coarse gravel(medium dense,moist to wet)(ablation till) 6.0-13.0 SM Gray with brown mottling,silty,fine to medium SAND with fine to coarse gravel(very dense, moist)(lodgement till) 1 Test pit completed to 13.0 ft on December 12, 1997. Light groundwater seepage encountered from 3.0 to 6.0 ft. a i✓ Y CD U. 2 • • N Note: Stratigraphic contacts are based on field interpretations and are approximate. Refer to the text for an explanation of subsurface conditions. Refer N to Soil Classification System figure for additional information on symbols and terminology. Log of Test Pits Figure A-5 APPENDIX B Laboratory Testing APPENDIX B LABORATORY TESTING Natural moisture content determinations were conducted in Landau Associates' laboratory on representative samples recovered from the test pits and boring for the purpose of classification. Laboratory testing was performed in general accordance with the American Society of Testing and Materials (ASTM) standard test procedures, which are described below. The samples were checked against the field log classifications, which were updated where appropriate in general accordance with ASTM D2487,Standard Test Method for Classification of Soils for Engineering Purposes. NATURAL MOISTURE CONTENT Natural moisture content determinations were performed on soil samples recovered from the test pits and boring in accordance with ASTM D2216. The natural moisture contents are shown at the respective samples depths in the column labeled"Moisture Content"on the summary boring and test pit logs in Appendix A. 02/19/98 I:�PROJECR238\0I7.201SW340DET.FIN BA LANDAU ASSOCIATES RECEIVED BY COMMA tv( ti'IEiIEWPMENT DEPARTMENT ENVIRONMENTAL CHECKLIST MAR 0 4 1998 Purpose of Checklist: 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 your proposal. Governmental agencies use this checklist to determine whether the environmental impacts of your proposal are significant, requiring preparation of an Environmental Impact Statement (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 land use 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. 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. 1 A. BACKGROUND: 1. Name of proposed project, if applicable: City of Federal Way SW 340th St. Regional Storage Facility 2. Name of Applicant: City of Federal Way Department of Public Works 3. Address and phone number of applicant and contact person: Applicant: Agent (if applicable): City of Federal Way KCM, Inc. Department of Public Works 1917 First Avenue 33530 1st Way South Seattle,WA 98101 Federal Way,WA 98003 (253) 661-4095 (206)443-5300 Contact Person: Primary Contact Person: Mr. Greg Gaasland, P.E. Mr. Marwan Salloum,P.E., Secondary Contact Person: Mr.Jeff Pratt,P.E. 4. Date checklist prepared: February 18, 1998. 5. Agency requesting checklist: City of Federal Way,Washington 6. Proposed timing or schedule(including phasing, if applicable): Construction is anticipated to occur during the summer of 1998. 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes,explain. There are no plans for future activity directly associated with this project. 8. List any environmental information you know about that has been prepared, or will be prepared,directly related to this proposal. The following reports are related to this proposed action and are incorporated into this SEPA document by reference: • KCM,Inc., 1996. Comprehensive Surface Water Facility Plan-- Phase I. Prepared for the City of Federal Way. 2 • Landau Associates, Inc., 1997. Draft Phase I Environmental Site Assessment Report, Proposed SW 340th Street Detention Facility, Parcel No. 30890000225, Federal Way, Washington,Prepared for the City of Federal Way. • Landau Associates, Inc., 1997. Draft Geotechnical Report: SW 340th Street Regional Storage Facility, Federal Way, Washington. Prepared for the City of Federal Way. • U.S. Department of Agriculture, 1973. Soil Conservation Service, Soil Survey King County Area, Washington. • Sheldon& Associates, Inc., 1997. Wetland/Stream Determination. Prepared for the City of Federal Way. 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes,explain. No other related applications are known to be pending for government approval at this time. 10. List any government approvals or permits that will be needed for your proposal,if known. The approvals and permits anticipated for this project include: • City of Federal Way Zoning Code Compliance or process approvals, grade and fill permit,land surface modification permit and construction permit. • Washington State Department of Ecology Water Quality Modification • Washington State Department of Fish and Wildlife Hydraulic Project Approval 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 purpose of the project is to reduce the magnitude and frequency of local flooding on 35th Avenue SW and vicinity by developing a 11.3 acre-ft storm water detention facility south of SW 340th Street between 39th Avenue SW (49th Avenue NE) and 37th Avenue SW (see Figure 1). The project would control a total of 124.4 acres of tributary drainage, without increasing peak flows to the east tributary of Joe's Creek. The project includes the development of a new lateral diversion pipeline along SW 342nd Street that would intercept 30.9 acres of storm water runoff and the replacement of a restrictive trunk line along 35th Avenue NE. The proposed project is identified in, and consistent with, the local comprehensive surface water management plan. 3 The lateral connection consists of a 24-inch smooth-bore pipe between the storm water storage facility and the intersection of SW 342nd Street and 35th Avenue SW. The 11.3 acre storm water storage facility would be built through excavation, with a 5-foot wide soil berm along the north and east edge of the facility and a portion of the south and west sides. Two 10-inch orifices would be used to control the downstream flow at the outlet. The project would include water quality enhancement features including a sedimentation pond, a low flow meandering channel, an outlet micropool, along with the planting of native vegetation throughout the project. The trunk line replacement on 35th Avenue SW would increase the overall capacity of the system by upsizing this facility to a 24 inch smooth-bore pipe. 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 area is located within the City of Federal Way in the NE quarter of Section 14,Township 21 N, Range 3 E. The site is generally contained within an area bounded on the north by SW 340th Street, on the west by 39th Avenue SW (49th Avenue NE), on the south by SW 342nd Street and on the east by 35th Avenue SW. Figure 1 shows the vicinity and location of the project area. B. ENVIRONMENTAL ELEMENTS: 1. EARTH: a. General description of the site (underline one): Flat, rolling, hilly, steep slopes, mountainous, other The topography of the project site slopes gently to the north and east towards a residential area in the south western portion of the City of Federal Way. The difference between the highest and lowest points on the site does not exceed 10 feet, and the maximum grade is approximately 40 percent for distances less than 5 feet associated with the drainage ditch. b. What is the steepest slope on the site (approximate percent slope)? With the exception of the drainage ditch, the slope on the property is between 2- 4 percent. 4 c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. According to the King County Soil Survey, the primary soil series in the general project area is Alderwood gravelly sandy loam, 0 to 6 percent slopes (AgB), that is defined as: Alderwood gravelly sandy loam,0 to 6 percent slopes (AgB). This series is made up of moderately well-drained soils that have a weakly to strongly consolidated substratum at a depth of 24 to 40 inches. The surface layer and subsoil are very dark brown, dark-brown, and grayish-brown gravelly sandy loam about 27 inches thick. The substratum is grayish-brown, weakly consolidated to strongly consolidated glacial till that extends to a depth of 60 inches and more. Runoff is slow and the erosion hazard is slight. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. There are no indications of unstable conditions along the project route. The soils in the area are described by the Soil Conservation Service as having only a slight potential for slippage. The draft geotechnical report indicates that the ablation and lodgement till and the existing fill at the site is suitable for use as structural fill for the storage facility's embankments. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. No filling is proposed with this project. However, the site was previously filled a number of years ago in preparation of the site for residential development. Information from test pit locations indicated that the fill is made up of 1 to 2.5 feet of loose to medium dense,silty sand,and silty sand with gravel. The property owner to the west of the storage facility site has requested that some of the excavated material be placed as fill on the adjacent property. It is anticipated that this adjacent property will be used for placement of excavated materials. Approximately 18,500 cubic yards of soil will be excavated for the construction of the soil embankments, of which approximately 1,820 cubic yards will be used to construct the earthen berm along the edge of the detention facility. Approximately 1,850 cubic yards of Type A topsoil will brought in for planting. In addition, trenching excavations and backfill operations will take place along the SW 342nd Street and 35th Avenue SW pipeline routes. The quantity of earth moved for this portion of the project is calculated to be approximately 4,000 cubic yards. 5 f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Clearing vegetation from the site as well as the proposed excavation activities have the potential to cause limited erosion during construction. Timing and phasing of construction, the amount of vegetation removed, the effectiveness of erosion-control measures, and weather conditions would influence the extent of this erosion potential. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? This project will not result in any net increase in impervious surfaces on the project site. h. Proposed measures to reduce or control erosion, or other impacts to the earth Construction is to be performed during dry periods (e.g., during summer months) followed by immediate restoration and enhancement of vegetation. An erosion and sedimentation control plan (approved by the City) will be developed as part of the final design to minimize impacts of erosion during construction. Measures would include vegetative controls, structural controls such as fabric filter fences and gravel berms, and other Best Management Practices (BMPs). Monitoring and maintenance of such control measures would be conducted throughout project construction to ensure proper performance. 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 know. A variety of construction activities associated with the project, if not properly mitigated, would temporarily generate particulates with a diameter less than 10 microns (PM10) and small amounts of carbon monoxide (CO). Emissions of PM10 and CO from construction activities would be temporary in duration and small in quantity compared with existing background levels from other sources such as automobiles. Excavation activities by heavy equipment will generate dust from the site. Vehicles leaving the site may deposit mud on public streets, which could then become a source of dust after it dries. 6 b. Are there any off-site sources of emissions or odors that may affect your proposal? If so,generally describe. No off-site sources of emissions or odor would affect the proposal. c. Proposed measures to reduce or control emissions or other impacts to air, if any: Particulate emissions in the form of fugitive dust during construction activities are regulated by the Puget Sound Air Pollution Control Agency (PSAPCA). PSAPCA regulations require best available control technology to control all emissions of fugitive dust. These requirements further stipulate that fugitive dust from construction activities shall not be injurious to human health, plants and animals, or property, and shall not unreasonably interfere with the enjoyment of life and property. Also, the operation of a vehicle that deposits particulate matter on a paved,public highway is prohibited. Construction impacts to local air quality would be reduced by incorporating mitigation measures into construction specifications for the project. Mitigation measures to control PM10, deposition of particulate matter, and emissions of CO during construction could include the following: • Spraying exposed soil with water would reduce emissions of PM10 and deposition of particulate matter. • Covering all trucks transporting materials would eliminate particulates blowing off trucks during transportation. Wetting materials in trucks or providing adequate freeboard (space from the top of the material to the top of the truck ) would reduce PM10 and deposition of particulates during transportation. • Removing particulate matter deposited on paved, public roads would reduce mud on area roadways. • Routing and scheduling construction trucks so as to reduce traffic delays during peak travel times would reduce secondary air quality impacts caused by reduction of traffic speeds while waiting for construction trucks. • Requiring appropriate emission control devices on all construction equipment powered by gasoline or diesel fuel would reduce CO emissions in vehicular exhaust. Using relatively new, well-maintained equipment would reduce CO emissions. 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. There are no surface water bodies on or in the immediate vicinity of this project. The closest surface water source is the east tributary of Joe's Creek, approximately 400 feet from the nearest project element (35th Avenue SW trunk replacement), where the existing storm drainage system daylights. 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. No project work is anticipated in or within 200 feet of surface water bodies. 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. Excavation activities in and along the pipeline route will not affect local water bodies. 4) Will the proposal require surface water withdrawals or diversions? Give general description,purpose,and approximate quantities if known. No surface water withdrawals or diversions will be required as part of this project. 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. The proposed project 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. No discharges of waste materials into surface waters are anticipated as a result of the construction of this project. 8 b. Ground: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities if known. The project will be constructed below the existing water table resulting in interaction between the storm water facility and the adjacent ground water. During low storm water discharge periods, ground water may flow into the storm drainage facility and drain along with any storm water flow. During high flow periods, hydrostatic pressure may cause some interaction with groundwater sources adjacent to the facility; however, these peak flow will be short in duration (1-3 hours) and interaction will be limited to waters immediately adjacent to the facility. No degradation to the overall water supply is anticipated. A monitoring well has been located on-site, which will help identify the level of the ground water table, and allow measurement of shallow ground water quality. 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 any toxic 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) is(are) expected to serve. The proposed project will not require the discharge of waste material to groundwater from septic tanks or other systems. 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. Runoff in excess of the soil/surface absorption capacity originates within the subbasin. The existing system is not adequately sized to handle major storm runoff events. The proposed project will assist in remedying this situation. No additional flow volume will be added to the system as a result of this project. 2) Could waste materials enter ground or surface waters? If so, generally describe. The quality of storm drainage from the local subbasin is typical of a residential/commercial area in that the major runoff components emanate from streets, parking lots, and commercial operations yards. This project will increase the system's capacity 9 and includes low flow sediment controls that will improve water quality. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: During the construction of the facilities proposed for this project, diversion of runoff water will be provided where appropriate. The erosion control plan developed for this project will address runoff control as well. A Water Quality Modification approval from the State Department of Ecology will dictate specific conditions for holding and/or treating excess water generated by the construction process. Federal Way's Department of Public Works is involved in implementing a city- wide surface water control program. The goal is to generally manage storm water runoff which emanates from properties and streets within the City and which eventually enters nearby streams. The Department's on-going surface water management program includes specific projects such as this proposed action, as well as public education, regular street sweeping and storm system cleaning, and investigation of local surface water complaints. Source controls are promoted as part of this program,as well. The project will include a seepage drain system made up of washed gravel encased in a geotextile that will be built into the bottom sides of each embankment. Topsoil and plants will cover the buried drain. This drainage layer will be used to allow the ground water to percolate down towards the base of the facility to minimize erosion and slumping that could be caused by ground water seepage. 4. PLANTS: a. Check or circle types of vegetation found on the site: X deciduous tree: alder, maple,aspen,other.(Saplings) evergreen tree: fir, cedar,pine,other. shrubs. X grass. pasture. crop or grain. X wet soil plants: cattail,buttercup,bulrush,skunk cabbage,other. water plants:water lily,eelgrass,milfoil,other. other types of vegetation. The site is mostly grasses, berry brambles and a few deciduous saplings. Along the drainage ditch there are some wet soil plants such as cattails. 10 b. What kind and amount of vegetation will be removed or altered? The project site is a vacant parcel, that was cleared as many as 20 years ago to accommodated future single family residential development. Existing vegetation includes a variety of grass, and some sapling deciduous trees. All existing vegetation will be removed during construction; however, the project includes the planting of native species. c. List threatened or endangered species known to be on or near the site: None are known to occur at or near the project area. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: Shoulder areas, embankments, slopes, and the storage facility's bottom will be planted with native species,such as wetland grasses,trees,and shrubs. 5. ANIMALS: a. Underline 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. Mammals: deer,bear,elk,beaver,other: Fish:bass,salmon, trout,herring,shellfish. b. List any threatened or endangered species known to be on or near the site. None are known to occur at or near the project area. c. Is the site part of a migration route? If so,explain. The project site is not part of a migration route. d. Proposed measures to preserve or enhance wildlife,if any: Plantings found in a wetland environment will likely attract some wildlife species. The sedimentation pond and outlet micropool will reduce sedimentation levels and improve water quality to downstream habitats. 11 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. Energy would be required for construction of drainage improvements, and would include diesel and gasoline fuel used by construction vehicles and equipment, and by workers accessing the site. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. The project would not affect the potential use of solar energy by adjacent properties. 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: Proposed measures to control energy impacts during construction would include the following: limiting idling of construction and employee vehicles; encouraging carpooling or vanpooling of construction workers to and from the work site; locating construction staging areas as close as possible to the site; and phasing construction and designing efficient detours to limit idling traffic. 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. An eight inch sewer line lies along the eastern edge of the storm water storage facility property. The line has been marked and is not likely to be disturbed during construction activities. There is not anticipated to be any potential for exposure to toxic or hazardous materials,explosion risks,or other environmental health hazards associated with the construction or operation of the project. Careful construction management practices will be followed to minimize construction-related accidents or injuries. 1) Describe special emergency services that might be required: Construction-related accidents or injuries may require response by local fire,police,aid units,or ambulances. 12 2) Proposed measures to reduce or control environmental health hazards, if any: None are necessary. b. Noise: 1) What types of noise exist in the area which may affect your project (for example: traffic,equipment,operation,other)? There are no noise sources in the project area that would affect the proposed project. 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. Construction activities would generate short-term noise during the construction period of the project. Project construction would involve excavation, pipeline placement activities, building of berms and replanting activities. The replacement of the lateral on SW 342nd Street and the trunk line on 35th Avenue SW would also involve the removing of paved surfaces and repaving along these sections. The most prevalent noise source at construction sites would be engine- powered equipment during daylight operating hours. Local noise regulations set permissible levels for operation of construction equipment. The regulations do not apply, however, to construction equipment during daytime hours, when project activities would occur. Because trucks would be present during most phases, noise from construction trucks usually would affect more people. Maximum noise levels from construction equipment could range from about 70 to 100 dBA at 50 feet and from 50 to 90 dBA at 200 feet. During construction, noise levels could temporarily increase at sensitive receptors along some sections of the pipeline route. The final project would generated no significant noise impacts. 3) Proposed measures to reduce or control noise impact,if any: To reduce construction noise at nearby receptors, the following construction measures have been identified: • Equipping engines of construction equipment with adequate mufflers, intake silencers, and engine enclosures to reduce their noise emissions by 5 to 10 dBA • Shielding noisy equipment with acoustic barriers to reduce noise levels 13 • Specifying the quietest equipment available to reduce noise emissions by 5 to 10 dBA • Turning off construction equipment during prolonged periods of nonuse to eliminate noise from construction equipment during those periods • Requiring contractors to maintain all equipment and train operators to reduce noise levels and increase efficiency of operation • Limiting construction activities to between 7 AM and 8 PM Monday through Saturday to eliminate construction noise during the more sensitive nighttime hours and to comply with local noise regulations. no sconstruction is permitted on Sundays without the Community Development Director's approval. • Locating stationary equipment away from receiving properties to decrease noise from that equipment relative to the increased distance 8. LAND AND SHORELINE USE: a. What is the current use of the site and adjacent properties? The project area is bordered, generally, by a single family residential homes or other vacant parcels. To south there exists a small storm water facility owned by the City of Federal Way, and to the southwest there is a QFC grocery store and a medical clinic. These uses will continue after construction. b. Has the site been used for agriculture? If so,describe: The site is not known to have been used for agriculture. c. Describe any structures on the site: There are no structures currently on the site. Nearly the entire pipeline route is paved and on.public right-of-way. d. Will any structures be demolished? If so,what? A single 12 foot section of existing drainage pipe will be removed. 14 e. What is the current zoning classification of the site? The zoning designation in the area is Single Family Residential (RS 7.2). f. What is the current comprehensive plan designation of the site? The current Federal Way Comprehensive Plan designation for the site is Single Family-High Density(7.2). g. If applicable, what is the current shoreline master program designation of the site? This area is not within any shorelines area and so is not identified in the City's Shoreline Management Plan. h. Has any part of the site been classified as an "environmentally sensitive"area? If so, specify: The region within which the project is located does not include any environmentally sensitive areas. i. Approximately how many people would reside or work in the completed project? Not applicable. j. Approximately how many people would the completed project displace? Not applicable. 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: No such measures are necessary. 15 9. HOUSING: a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. Not applicable. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. Not applicable. c. Proposed measures to reduce or control housing impacts, if any: Not applicable. 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? All the proposed work involves construction below grade. b. What views in the immediate vicinity would be altered or obstructed? No views would be altered or obstructed by this project. c. Proposed measures to reduce or control aesthetic impacts, if any: None are necessary. 11. LIGHT AND GLARE: a. What type of light or glare will the proposal produce? What time of day would it mainly occur? The project will generate little light or glare. All the proposed work involves construction below grade. b. Could light or glare from the finished project be a safety hazard or interfere with views? Not applicable. 16 c. What existing off-site sources of light or glare may affect your proposal? No existing off-site sources of light or glare will affect this project. d. Proposed measures to reduce or control light and glare impacts, if any: None are necessary. 12. RECREATION: a. What designated and informal recreational opportunities are in the immediate vicinity? Not applicable. b. Would the proposed project displace any existing recreational uses? If so, describe. No recreational impacts to the general area are anticipated. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: None are necessary. 13. HISTORICAL AND CULTURAL PRESERVATION: a. Are there any places or objects listed on, or proposed for, national, state, or local preservation registers known to be on or next to the site? If so, generally describe: No historical or cultural resources are known to exist on or next to the site. Prior to any construction, inquiries will be made into City records regarding the presence of any known cultural resources. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. There are none known to exist on or next to the site. 17 c. Proposed measures to reduce or control impacts, if any: None are necessary. If cultural artifacts or historic resources are uncovered during construction, project work will be suspended. Appropriate authorities at City and State levels will be notified and appropriate measures will be taken to protect these resources. 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. Regional access to the project area is via Interstate 5 and SR 99, approximately 5 miles east of the site. The major streets in the vicinity of the proposed flood control improvements include 39th Avenue SW (49th Avenue NE), 35th Avenue SW,and SW 340th Street: b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? The project area is served by Metro bus service. Route 176 operates and stops on SW 342nd Street,south of the site,between Federal Way and Downtown Seattle. c. How many parking spaces would the completed project have? How many would the project eliminate? No change in the current number of existing parking spaces will result from this project. 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): The only road work anticipated with this project will involve repaving excavated portions of right-of-way and private parking lots. e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so,generally describe: Not applicable. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. 18 Some local traffic delays and temporary reroutings may occur during the construction phase of this project. However, no measurable impact on traffic will result from the completed project. g. Proposed measures to reduce or control transportation impacts, if any: Approved traffic control will be provided in order to minimize short-term traffic congestion during construction. 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: Storm water drainage systems require periodic maintenance by the Public Works Department. c. Proposed measures to reduce or control direct impact on public services,if any: None are necessary. 16. UTILITIES: a. Underline utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other: storm drainage system. a. 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: No utility services will be required by this project. 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 it d 'sion. OWNER/AGENT SIGNATURE: t DATE SUBMITTED: ' 1\�\°a 19 -. -----_._...9,1 ----- 1S.VCrraTF4 . _ - ---- --0 ____ _____1 (C-4) to - _ 1 • -i — _ _ 24 RCP y _ = -- - - _ Trunk o __ — \ , j Replacement = 10 �� G / • _ / Control --ram\ - ,-_.--__-e---- Structure L _ )♦� _--_•4 S.W.340TH ST. Outlet —= `—' _ \ Micropool I i _ _ — _ _— — _ vi — - _ Q-__ - i —^ w � _= = -- 11.3 Acre-Foot : __ • _ _ _/ • Storage _ _ - _ > - ,—~ —, M Low-Flow = — _ Meandering = 1. Channel I► i __ M ; Sedimentation : = Intercept Drainage - - - Pond— 0 . i _-Along 35th Ave. SW I-' — S.W.342ND ST. — — 24" RCP T--� Lateral— = ' �- Z O W - F- rn v N # - 0 50' 100' 150' 200'250' I �, City of Federal Way Figure 1. 1917 First Avenue SW 340TH STREET VICINITY AND LOCATION OF PROJECT Seattle, Washington 98101 REGIONAL STORAGE FACILITY CO„*. G MASTE] STD USE APPLICATION .0 •N w DEVELOPMENT SERVICES N)V 3330. Y'i- �' ay South,Federal Way,WA 98003 (253)661-4000—Fax(253)661-4129 --- ' C,C- . _.________ . ... APPLICATION No. Date 412-64 i t ii c,J o` ree'S- .11' .l�lioil ; ✓ Project Name Agent ., Name of Applicant S� Owner Applicant Address Phone c Signature ('!(W(AkIi\ C `�(OJ'"`- Owner Name/Address Phone (ifdifferent than applicant) Property Location • . ne 2S -3 • • Legal Description L OIS 40 r SS 4.4cAPICMSy S oject Description � 11.3 acre -- sbrwn wader Ae-1- �0vN -C-aL1li'k' SCi.*GN of SUJ 340`e` SA-ceef be 'ieevl we s\ (44 - VParce1 Number(s) 3o f�`i 0000 22S 3 - ykve, s� . Type of Permit Required: SEPA Notice Sign Checklist Mailed Board Site Plan Review R R * Land Surface Modification R R * Boundary Line Adjustment Binding Site Plan R R R Short Subdivision * * * Subdivision R R R Shoreline R R * Variance R R R Conditional Use R R R Use Process I R R * Use Process II R R R —0 Use Process III R R R Quasi-Judicial Rezone R R R Variance R* R R Comp.Plan/Rezone R R Annexation R R Lot Line Elimination lii, Application Meeting SrEPA Only R R R—Required *=Optional by City Pram 8/20/97