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06-100651
CITY OF �. Federal Way May 4, 2006 CITY HALL FILE 33325 8th Avenue South Mailing Address: PO Box 9718 Federal Way, WA 98063-9718 (253) 835-7000 www.cityoffederalway.com Michael Martin 2800 300 Place Federal Way, WA 98023-2325 RE: File No. 06-102032-00-AD; GEOLOGICALLY HAZARDOUS AREA DEVELOPMENT APPROVAL Martin Residence, 2804 SW 300'` Place, Federal Way Dear Mr. Martin: The City has completed an administrative review of the application to construct a new, single-family residence and associated site improvements on an undeveloped lot within a geologically hazardous area at 2804 SW 300t' Place. The application for development within a GHA is hereby conditionally approved based on the following findings. Pursuant to Federal Way City Code (FWCC) Section 22-1286, development activities may not occur on or within 25 feet of a GHA unless no reasonable alternative exists and then only if the development activity will not lead to or create any increased slide, seismic, or erosion hazard. In the case of the above - referenced project, the whole site meets the definition of geologically hazardous area. As such, the proposed development activity is subject to the requirements of FWCC Section 22-1286(c). The applicant submitted the following information: a soils report prepared by Engineering Geological Services April 2, 2002 report; Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC dated October 10, 2005; Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC dated January 27, 2006; Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC dated March 15, 2006. The reports conclude that the site is capable of being developed with a single- family residence, provided the geotechnical engineering recommendations are followed. The geotechnical reports include an analysis of GHA conditions and the proposed site development plan. The City completed its review of the geotechnical reports and recommended an additional condition in order to minimize the environmental impacts of the project and to comply with FWCC Section 224286. Based on an analysis of submitted information, the City finds that grading and site development within the geologically hazardous area is necessary. Therefore, the development activity is approved based on the recommendations of the geotechnical engineering reports and subject to the following condition. CONDITION Section F of the geotechnical report recommends that disturbance to critical slopes be minimized due to the high erosion potential when vegetation is removed. Before issuance of a permit for construction of the single-family residence, the applicant must revise the plans and place the storm drainage pipe above ground with anchors in areas with existing slopes of 30% or greater as required by the Federal Way Public Works Department. Mr. Martin May 4, 2006 Page 2 If you have additional questions, please contact Jim Harris, Senior Planner, at 253-835-2641. Sincerely, -KL Kathy McClung Director of Community Development Services enc: Approved site plan by ESM Consulting Engineers dated revised 12-22-05 Jim Harris, Senior Planner Ann Dower, Engineering Plans Reviewer ESM Consulting Engineers, Eric Labrie 06-102032 Doc. I D. 36148 P G E Pacific ��o �ngiEteE��i17g«c GeoteGf}ltiCB! Et79ineeri►tg, Carlselltirtg & Irrsyeclttan March 15, 2006 RESUBMIT-TED Dr. and Mrs. Michael Martin 2800 - 300th Place SW Federal Way, WA 98003 MAR 17 2006 CITY OF FEDERAL WAY BUILDING DEPT. Re: 2nd Revision of ttndating f the "Geology and Gcotcchnical Engineering Investigation, Martin Residence Report Prepared by Engineering Geological Services and Liu & Associates, Inc., dated April 2, 2002", PGE Project No. 0509100-R-2 Ref (1) Review comments by Mr.. Jim Harris of The City of Federal Way, dated 03-13-06, (2) 'Geology and Geotechnieal Engineering Investigation, Martin Residence Report', prepared by 1ngineering Geological Services and Liu & Associates, Inc., dated 04-02-02. (3) 'Grading and TESC Plan for Martin Property', prepared by ESM, dated 10-31-05, Job No.1210- 001-005, Dwg. No. PL-01, Sheet 3 of 3. (4) PGE's 'Updating Letter, Proj. No. D509100-R, dated 01-27-06' for, the report in item 2. Dear Dr. and Mrs. Martin: As per the comments in, the above -referenced review letter of'City of Federal Way (item 1), PGE has reviewed the referenced Gcotcchnical Report (item 2) and the Site Plans (item 3), and revisited PGE's classification of the subject site as 'non geologically hazardous area', made earlier in their last updating letter (item 4). Based on the current review of the report and the plans, PGE has changed the above classification of the site to 'geologically hazardous area' as per the I:WCC Section 22-1, `Definitions' . However, it should be noted that PGE's comments on the issue of building the proposed residence in the subject site made earlier in their last updating letter remain unaltered. As mentioned in that letter, the proposed residence could be built in the subject site as currently planned provided the recommendations and limitations provided in the referenced geotechnieal report (item 2) is strictly followed during the planning, design, and construction phases of the project, and provided a professional gcotcchnical engineer is .retained during the construction phase of the project. We trust the information presented in this letter is sufficient for your current needs. Should you have any questions or concerns, which have not been addressed, or if we may be of additional assistance, please do not hesitate to call us at 425-918-1428 or 425-218.9316_ Respectfully submitted, Pacific G�eYo Engineering, UC SOU�Ct�- Santanu Mowar, MSCE, P.E_ Principal D:1(icntcchnici112005-ptojW509100-2nd Revised let 831 1771h PI. SW • Lynnwood, WA 98037 ■ (Tel) 425-918-1428 ■ (Fax) 425-918-1401 RESUBMITTED MAY 1 7 2006 CITY OF FEDERAL WAY Scope of Work for BUILDING DEPT_ Cultural Resources Monitoring of the Martin Property King County, WA n S- 1 05 Q 2 Prepared for Pam Martin Federal Way, WA By Northwest Archaeological Associates, Inc. 5418 201h Avenue NW, Suite 200 Seattle, WA 98107 Phone 206 781-1909 Fax 206 781-0154 nwaa@northwestarch.com May 15, 2006 Northwest Archaeological Associates, Inc. NORTHWEST ARCHAEOLOGICAL ASSOCIATES, INC. SCOPE OF WORK Pam Martin recently contacted Northwest Archaeological Associates (NWAA) to request a scope of work and cost estimate for monitoring during excavation in preparation for construction on her property at 2804 SW 30V Place, Federal Way 98023, in King County, Washington. The City of Federal Way has requested archaeological monitoring during excavation. The planned structure will include a basement and will be approximately 60 feet x 40 feet. The property is sensitive for archaeological sites because of proximity to Puget Sound and an archaeological shell midden nearby. Also of concern are Washington state laws that address archaeological sites and Native American burials. The Archaeological Sites and Resources Act [RCW 27.53] prohibits knowingly excavating or disturbing prehistoric and historic archaeological sites on public or private land. The Indian Graves and Records Act [RCW 27.44] prohibits knowingly destroying American Indian graves and provides that inadvertent disturbance through construction or other activity requires re -interment under supervision of the appropriate Indian tribe. NWAA will aid the project in complying with these various legal requirements by identifying cultural sites on the property through completion of the following tasks: Task 1: Records Search A check of the Washington state site inventory and records at the Department of Archaeology and Historic Preservation (DAHP) will be completed prior to construction monitoring. Other information will be collected from any recent geotechnical work for the project, if any has been completed, ethnographic and historic accounts, previous regional cultural resource investigations, local historical societies and informants, maps, photographs, and from environmental sources. The Muckleshoot Tribe and the Puyallup Tribe will be contacted about the project to solicit any additional concerns about heritage resources and to inform them when monitoring will take place. Task 2: Monitoring Archaeological monitoring requires that a NWAA archaeologist be on site during all ground disturbing activity associated with the project. As far as possible, all cultural resources and buried human remains will be avoided and actively preserved. Cultural resources include both isolated artifacts and intact cultural deposits and may result from pre -contact and historic activities and occupations. The primary goal of archaeological monitoring will be to ensure both recognition and documentation of any cultural materials identified during construction activities. If cultural resources should be discovered during construction monitoring, the client understands that work must stop immediately, and consultation with DAHP and the Tribes will be required. Task 3: Analysis & Site Form Preparation Any newly identified sites or cultural resources will be recorded on the appropriate Washington Archaeological Inventory forms, including a written description of the find, its setting, sketch maps, location on USGS 7.5 minute maps using GPS and photographs. Task 4: Letter Report The results of the records search, background research and monitoring will be presented in a letter report for submission by the property owner to DAHP, the Muckleshoot Tribe, the Puyallup Tribe, appropriate Northwest Archaeological Associates, Inc. 1 May 15, 2005 permitting entities, and other concerned parties. The letter report will present the results of the file check, archival research and field investigations. This report can be used to support preparation of SEPA or NEPA documents. Due to confidentiality requirements for archaeological site location, distribution of the report will be restricted. Task 5: Project Management NWAA will coordinate with Pam Martin to receive project materials, prepare reports, invoicing and transmit correspondence. NWAA will maintain project files to include necessary supporting materials as required. NWAA will also coordinate with Muckleshoot Tribe, and the Puyallup Tribe to ensure that they are fully informed about the progress of the work. The Project Manager will monitor project task performance, schedule, budget, and approve project expenses. The Project Manager will ensure that systems are in place to conduct quality assurance and quality control on deliverables and correspondence. Budget The attachment lists the costs to complete the tasks described in this Scope of Work. The spreadsheet identifies the professional classification and personnel assigned to complete each of the tasks, lists the hours of work by task and personnel, and presents the labor cost and expenses for the project. Project Materials Pam Martin has or will supply or facilitate NWAA's acquisition of the following needed for this project. ► A general location map; ► Any preliminary and revised engineering plan maps available, showing the location and extent of the project; ► Any additional descriptive information and design drawings that show the extent of trenching, grading, or other ground disturbance associated with the project; and ► The results of any geotechnical boring or subsurface testing that may assist in development of a land use/land formation history. Schedule NWAA staff can initiate the background research within 7 days of notice to proceed. The report can be completed within 20 days of completion of field work. Completion dates may be adjusted to meet the project's schedule. Northwest Archaeological Associates, Inc. May 15, 2005 0 (U L6 0 w Q a w w a w Q F.. w H O U o r- m� m o N V OJ Q Q N J QO 00 H V3 43 fA EA J N N aD 0 00 F- x N Q W N � C �E F» U N O N N J C W C U L a M O m N N y O m N N J � O U � m c a` n � � .No 0 W Q N Q O 0 0 IL �0 U) m U y O 0 � 0 �C N U) � L U a 69 Q d � C Cl! O y C N d C � F O � a N C O Q. Q ~ .N O LL � N C Oco0 L Q Lr wallup Tribe of India April 27, 2006 City of Federal Way Dept. of Community Devel. Services Attn: Kathy McClung 33325 8th Avenue South PO Box 9718 Federal Way, WA 98063 RE: Federal Way File Number: Location: Tax Lot Number: Dear Ms. Clung: RECEIVED BY COMMUNITY DEVELOPMENT DEPARTMENT MAY 0 1, ^ . uS 06-100651-00-SE 2804 SW 300th Place, Federal Way, Washington 012103-9130 Thank you for your letter of April I". The subject property is located within the Usual and Accustomed area of our people. As with all of these areas they are significant areas to our Tribe. The project location is in very close proximity to several sites where human remains and associated funerary objects have been found. At this time, please recognize that historic sites may be exposed when such projects are undertaken. We recommend that you hire an archaeologist to oversee and evaluate the proposed location of your project and complete a cultural resource report. Any exposure of historical sites will need to be reported to my office immediately. The comments contained within this letter apply to cultural and historic resources exclusively. The Tribe encourages your agency to contact the Tribe's Natural Resources, Land Use, or other applicable departments and solicit those departments' input on your project. Other Tribal departments may have objections, concerns or input into your proposal above and beyond comments contained within this letter. Thank you for your letter. Please address further correspondence to: Puyallup Tribe of Indians - Historical Preservation-Attn: Judy Wright 1850 Alexander Avenue Tacoma, WA 98421 Phone: (253) 573-7897 Fax: (253) 573-7929 1850 Alexander Avenue - Tacoma, Washington 98421 0 253/597-6200 CITY OF �. Federal Way April 26, 2006 FILE CITY HALL 33325 8th Avenue South Mailing Address: PO Box 9718 Federal Way, WA 98063-9718 (253) 835-7000 www. cityo ffederal way. com Eric Labrie ESM Consulting Engineers LLC via email: eric.labrie@esmcivil.com 33915 0 Way South, Suite 200 Federal Way, WA 98003 RE: File No. 06-100651-00-SE; MDNS COMMENTS AND PROJECT APPLICATION STATUS Martin Single -Family Residence, 2804 SW 3001h Place, Federal Way Dear Mr. Labrie: The State Environmental Policy Act (SEPA) comment period for the Martin single-family residence has expired. Enclosed is a copy of a SEPA comment letter the City received from the Puyallup Tribe of Indians, dated April 4, 2006. No action by you is required in response to the comment letter, as the mitigation measure on the April 1, 2006 Mitigated Determination of Nonsignificance (MDNS), addresses the Tribe's request to "hire an archeologist to oversee and evaluate the proposed location of the project". The MDNS is being retained unchanged. The SEPA appeal period for the proposal expires on May 1, 2006. The next procedural step will be the City's issuance of the geologically hazardous area intrusion approval. I anticipate this decision will be issued shortly after conclusion of the SEPA appeal period. I anticipate that a condition of the GHA approval will require a revised drainage plan to address the following comment/condition from Ann Dower of the Federal Way Public Works Department: "Section F of the geotechnical report recommends that disturbance to critical slopes be minimized due to the high erosion potential when vegetation is removed. To comply with this recommendation, the applicant must revise the plans and place the storm drainage pipe above -ground with anchors in areas with existing slopes of 30% or greater. " Before issuance of the building permit, the executed scope of work for an archeologist identified in the SEPA MDNS will need to be submitted to the City and the Public Works Department drainage comment identified above will need to be addressed. Contact Ms. Dower directly at ann.dower@cityoffederalway.com or 253-835-2732 regarding the drainage comment. If you need further assistance, please contact me at jim.harris@cityoffederalway.com or 253-835-2641. Sincerely, i arris Senior Planner enc: Puyallup Tribe of Indians Letter dated April 4, 2006 c: Ann Dower, Engineering Plans Reviewer Michael and Pamela Martin, 2800 SW 300'h Place, Federal Way, WA 98023 06-100651 Doc I D. 36063 CITY OF �. Federal April 26, 2006 Amber Sterud Puyallup Tribe of Indians 1850 Alexander Avenue Tacoma, WA 98421 FILE CITY HALL �� 33325 8th Avenue South Mailing Address: PO Box 9718 Federal Way, WA 98063-9718 (253) 835-7000 www.cityoffederalway.com RE: File No. 06-100651-00-SE; SEPA COMMENT LETTER Martin Single -Family Residence, 2804 SW 3001h Place, Federal Way Dear Ms. Sterud: Thank you for the April 4, 2006 comment letter, for the above -referenced proposal. After review of your letter and the Mitigated Determination of Nonsignificance, we feel that the State Environmental Policy Act (SEPA) mitigation measure addresses your request to "hire an archeologist to oversee and evaluate the proposed location of the project." The City is retaining the MDNS unchanged. The SEPA appeal period for the proposal expires on May 1, 2006. In your letter you also request copies of both recorded (cultural resource) sites mentioned in the City's MDNS. The first site is a shell midden located at 2876 SW 3001h Place, Federal Way, WA 98023. The second site is in the Lakota Beach area, and the City is not privy to the exact location. For further information on the second site, I suggest you contact the Washington State Office of Archeology and Historic Preservation. If you need further assistance, please contact me atjim.harris@cityoffederalway.com or 253-835-2641. Sincerely, •6441VWA i arris Senior Planner c: Ann Dower, Engineering Plans Reviewer Michael and Pamela Martin, 2800 SW 300`h Place, Federal Way, WA 98023 Eric Labrie, ESM Consulting Engineers LLC, 33915 1" Way South, Ste 200, Federal Way, WA 98003 06-100651 Doc [ D. 36064 allup Tribe of Indians April 20, 2006 City of Federal Way Dept. of Community Development Services Attn: Kathy McClung 33325 8th Avenue South PO Box 9718 Federal Way, WA 98063 COMMUNII ... APR 2 4 ZUUb RE: Federal Way File No.: 06-100651-00-SE Location/Address. 2800 SW 300th Place — Federal Way, WA 98003 Martin Single -Family Residence Dear Ms. McClung: Thank you for your e-mail of April I". The subject property is located within the Usual and Accustomed area of our people. As with all of these areas they are significant areas to our Tribe. The project location is in very close proximity to several sites where human remains and associated funerary objects have been found. At this time, please recognize that historic sites may be exposed when such projects are undertaken. We recommend that you hire an archaeologist to oversee and evaluate the proposed location of your project. Any exposure of historical sites will need to be reported to my office immediately. The comments contained within this letter apply to cultural and historic resources exclusively. The Tribe encourages your agency to contact the Tribe's Natural Resources, Land Use, or other applicable departments and solicit those departments' input on your project. Other Tribal departments may have objections, concerns or input into your proposal above and beyond comments contained within this letter. Thank you for your letter. Please address further correspondence to: Puyallup Tribe of Indians - Historical Preservation Attn: Judy Wright 1850 Alexander Avenue Tacoma, WA 98421 Phone: (253) 573-7897 Fax: (253) 573-7929 Sincerely Amber Sterud Historic Research Assistant 1850 Alexander Avenue 9 Tacoma, Washington 98421 0 253/597-6200 RECEIVED B' COMMUNITY DEVELOPMENT b, ARTMENT y, 0 5 2006 luwallup Tribe of India April 4, 2006 City of Federal Way Attn: Kathy McClung 33325 8th Avenue South PO Box 9718 aUU^/-/ Federal Way, WA 98063-9718 RE: Location Address: 2804 SW 300th Place — Federal Way, WA Tax Lot Number: 012103-9130 Fed Way File #: 06-100651-00-SE Dear Ms. McClung: Thank you for your letter of April I". The subject property is located within the Usual and Accustomed area of our people. As with all of these areas they are significant areas to our Tribe. The project location is in very close proximity to several sites where human remains and associated funerary objects have been found. At this time, please recognize that historic sites may be exposed when such projects are undertaken. We recommend that you hire an archaeologist to oversee and evaluate the proposed location of your project. We would like to be kept up to date on the hiring of an Archaeologist and when they are in the field. Any exposure of historical sites will need to be reported to my office immediately. We would also like to request copies of both recorded sites that were mentioned in your letter. The comments contained within this letter apply to cultural and historic resources exclusively. The Tribe encourages your agency to contact the Tribe's Natural Resources, Land Use, or other applicable departments and solicit those departments' input on your project. Other Tribal departments may have objections, concerns or input into your proposal above and beyond comments contained within this letter. Thank you for your time and your prompt response. If you have any questions, please contact our office at (253) 573-7897. Sine rely sk Amber Sterud Historic Research Assistant 1850 Alexander Avenue • Tacoma, Washington 98421 a 253/597-6200 4ik CITY OF Federal Way NOTICE OF ENVIRONMENTAL MITIGATED DETERMINATION OF NONSIGNIFICANCE MARTIN RESIDENCE Federal Way File No: 06-100651-00-SE The City of Federal Way has determined that the following project does not have a probable significant adverse impact on the environment, and an Environmental Impact Statement (EIS) is not required under RCW 43.21C.030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the City. Proposed Action: Construction of a new single-family residence and associated site improvements on a presently undeveloped lot, within a geologically hazardous area. Applicant: Michael and Pamela Martin 2800 SW 3001h Place Federal Way, WA 98003 Agent: ESM Consulting Engineers Eric LaBrie 33915 1" Way South, Suite 200 Federal Way, WA 98003 Location: 2804 SW 3001h Place, Federal Way, Washington (tax lot number 012103-9130) Lead Agency: City of Federal Way Mitigation Measure: In order to mitigate for potential impacts to cultural resources, a professional archeologist shall monitor grading and excavation of the site. Prior to issuance of a construction permit, the applicant shall provide the City with an executed scope of work for archeological monitoring by a qualified consultant. Before issuance of a certificate of occupancy for the residence, an archeological resources monitoring report shall be submitted to the State Office of Archeology. and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way. If archeological resources are encountered, work should pause, and the owner and/or agent shall notify the Washington State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way Department of Community Development Services. Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development, Federal Way City Hall, 33325 8`h Avenue South, Federal Way, WA 98003. Contact: Jim Harris, Senior Planner, Phone: 253-835-2641. This MDNS is issued under WAC 197-11-340(2). Comments must be submitted by 5:00 p.m. on April 17, 2006. 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. 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Rovlservletleom. esri. esn'ma-P.Esrimat)?Ser-viceName=overview&Clien... 2/6/2006 CITY OF L Federal Way March 31, 2006 Eric Labrie ESM Consulting Engineers LLC 33915 1" Way South, Suite 200 Federal Way, WA 98003 CITY HALL 33325 8th Avenue South Mailing Address: PO Box 9718 Federal Way, WA 98063-9718 (253) 835-7000 www.cityoffederalway.com RE: File No. 06-100651-00-SE; ENVIRONMENTAL THRESHOLD DETERMINATION Martin Single Family Residence, 2804 SW 300th Place, Federal Way Dear Mr. Labrie: This office and other City staff have reviewed the environmental checklist and additional information you submitted for the Martin single-family residence. We have determined that the above -referenced proposal will not have a probable significant adverse impact on the environment, provided the mitigation measure identified in the enclosed Mitigated Determination of Nonsignificance (MDNS) is met. As a result, an Environmental Impact Statement (EIS) is not required to comply with the State Environmental Policy Act (SEPA). A 14-day comment period is required by the SEPA rules (WAC 197-11-340). A notice inviting comments will be published in the Federal Way Mirror on April 1, 2006. At the end of the comment period, the department will determine if the MDNS should be withdrawn, modified, or retained. All final determinations may be appealed within 14 days of the end of the comment period. 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 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. 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 Mr. Labrie March 31, 2006 Page 2 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, please call Jim Harris, Senior Planner, at 253-835-2641. Sincerely, -/�� "el-L-"r Kathy McClung, Director Community Development Services enc: MDNS SEPA Staff Evaluation c: Jim Harris, Senior Planner Michael and Pamela Martin, 2800 SW 300`h Place, Federal Way, WA 98003 06-100651 Doc. [.Q 35672 41k CITY OF Federal Way MITIGATED ENVIRONMENTAL DETERMINATION OF NONSIGNIFICANCE MARTIN RESIDENCE Federal Way File No: 06-100651-00-SE Description of Proposal: Construction of a new single-family residence and associated site improvements on a presently undeveloped lot, within a geologically hazardous area. Applicant: Michael and Pamela Martin 2800 SW 300'h Place Federal Way, WA 98003 Agent: ESM Consulting Engineers Eric LaBrle 33915 1"Way South, Suite 200 Federal Way, WA 98003 Location: 2804 SW 300"' Place, Federal Way, Washington (tax lot number 012103-9130) Lead Agency: City of Federal Way The Responsible Official of the City of Federal Way hereby makes the following Findings of Fact based upon impacts identified in the Environmental Checklist; Final Staff Evaluation for Environmental Checklist, Federal Way File No.06-100651-SE; Conclusions of Law based upon the 2004 Federal Way Comprehensive Plan (FWCP); and other policies, plans, rules, and regulations designated as a basis for exercise of substantive authority under the Washington State Environmental Policy Act Rules pursuant to RCW 43.21C.060. FINDINGS OF FACT 1. The proposal is to construct a two-story, 2,435 square -foot single-family residence on an undeveloped lot in the Lakota Beach neighborhood. Development of the site will include improvements typically associated with a single-family residence including but not limited to the following: driveway, utilities, and landscaping. 2. The Washington State Department of Archeology and Historic Preservation has record of an archeological site in the Lakota Beach area. In addition to the recorded site, a cultural resource site has recently been found in the Lakota Beach area. The subject property is located within approximately 300 feet of the shoreline of Puget Sound, no -bank shoreline exists in the area, and the site is in close proximity to the two above -referenced cultural resource sites. The subject property is mapped as a geologically hazardous area. The on -site soils and the geologic conditions are evaluated in the following documents submitted to the City with the application: Engineering Geological Services April 2, 2002 report, Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC dated October 10, 2005; Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC dated January 27, 2006; Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC dated March 15, 2006. The reports conclude that the site is capable of being developed with a single-family residence, provided the geotechnical engineering recommendations are followed. 4. The Final Staff Evaluation for Environmental Checklist, Federal Way File Number 06-100651-00-SE is hereby incorporated by reference as though set forth in full. CONCLUSIONS OF LAW Federal Way's 2004 Comprehensive Plan Policies adopted by Federal Way, and contained within the 2003 FWCP, serve as a basis for the exercise of substantive SEPA authority to approve, condition, or deny proposed actions applicable to potential adverse environmental impacts resulting from this project. The following components of the FWCP support the conditions for the development. LUP 54 — Unique and fragile areas of the shoreline should be protected from uses or activities that will have an adverse effect on the land or water environment. LUG 15 — Use historic resources as an important element in the overall design of the City. LUP 193 — Safeguard and manifest Federal Way's heritage by preserving those sites, buildings, structures, and objects, which reflect significant elements of the City's history. The lead agency for this proposal has determined that the proposed action does not have probable significant adverse impact on the environment, and an Environmental Impact Statement (EIS) is not required under RCW 43.21 C.032(2)(c), only if the following condition is met. 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. CONDITION In order to mitigate for potential impacts to cultural resources, a professional archeologist shall monitor grading and excavation of the site. Prior to issuance of a construction permit, the applicant shall provide the City with an executed scope of work for archeological monitoring by a qualified consultant. Before issuance of a certificate of occupancy for the residence, an archeological resources monitoring report shall be submitted to the State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way. If archeological resources are encountered, work should pause, and the owner and/or agent shall notify the Washington State Office of Archeology.and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way Department of Community Development Services. This MDNS is issued under Washington Administrative Code (WAC) 197-11-340(2); the lead agency will not act on this proposal for 14 days from the date of issuance. Comments must be submitted no later than 5:00 p.m. on April 17, 2006. 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. Mitigated Environmental Determination of Nonsignificance Page 2 Martin Residence No: 06-100651-00-SE / oo� I.D. 35592 N Contact: Jim Harris, Senior Planner, 253-835-2641 Department of Community Development Services Responsible Official: Kathy McClung Position/Title: Community Development Services Director Address: 33325 8t' Avenue South, PO Box 9718, Federal Way, WA 98063-9718 Date Issued: April 1, 200d Signature: Mitigated Environmental Determination ofNonsignificance Martin Residence Page 3 No: 06-10065 1 -00-SE / Doc I.D. 35592 Map Output Pagel of 2 * King County T. - 9= 0205 0210 WAP - Property Information D120 lair Pu_ger Sound s11� Ot3`J �JiJ2 �tQ� 01 ±5 a1a� 0'=0 1 L�3i�3� 4�tG5 \0.',� 0535 0323 9J73. r 4 "r d _97 S 19 Z Kwq Ce a1 907 . 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County makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such httn://wwwS.metrokc_ gov/servleticom.esri.esriman-Esriman?ServiceName=overview&Chen... 2/6/2006 41k CITY OF Federal Way DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES FINAL STAFF EVALUATION FOR ENVIRONMENTAL CHECKLIST MARTIN SINGLE-FAMII.Y RESIDENCE ENVIRONMENTAL REVIEW Federal Way File# 06-100651-00-SE NOTE: The purpose of this final staff evaluation is to provide technical staff evaluation of the proposed action; supplement information contained in the environmental checklist and expanded studies; provide technical information unavailable to the applicant; and correct inaccurate information and recommend measures to the Responsible Official to mitigate identified environmental impacts. Technical reports and attachments referenced herein and in the environmental checklist may not be attached to all copies of this evaluation. Copies of exhibits, reports, attachments, or other documents may be reviewed and/or obtained by contacting the Department of Community Development Services, 33325 8`h Avenue South, PO Box 9718, Federal Way, WA 98063-9718. Phone: 253-835-2641. LIST OF TECHNICAL REPORTS The following studies and plans were prepared and submitted for the proposal. • Environmental Checklist, signed by Matt Cyr, ESM Consulting Engineers LLC, dated February 6, 2006; • Site Plan by ESM Consulting Engineers LLC, dated revised December 22, 2005; • Engineering Geological Services April 2, 2002 geotechnical report; • Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC, dated October 10, 2005; ■ Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC, dated January 27, 2006; • Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC, dated March 15, 2006. GENERAL PROJECT INFORMATION Project Name: Martin Residence Applicant: Michael and Pamela Martin 2800 SW 300"' Place Federal Way, WA 98003 Agent: ESM Consulting Engineers Eric LaBrie 33915 .1"Way South Federal Way, WA 98003 Project Location: 2804 SW 300`h Place, Federal Way, WA Federal Way Zoning: RS 15.0 Federal Way Comprehensive Plan Designation: Single Family -Medium Density SUMMARY OF PROPOSED ACTION AND BACKGROUND Construction of a new single-family residence and associated site improvements on a presently undeveloped lot. The site is regulated as a geologically hazardous area based on the soil types and slope characteristics of the site. Work proposed within this area is subject to environmental review and critical area review under the Federal Way City Code (FWCC). STAFF EVALUATION OF ENVIRONMENTAL CHECKLIST Following are staff responses to the elements of the environmental checklist (enclosed) indicating whether or not City staff concurs with the applicant's response to the checklist item, or staff clarification or amendment of the response. A. BACKGROUND 1-7. Concur with the checklist. The project timing identified in the checklist depends upon a number of factors including but not limited to securing of all required permits for construction of the residence. Refer to the above list of technical reports and drawings. 9. A building permit application has been filed with the City. 10. In addition to the building permit, the Director of Community Development Services must approve the land surface modification within geologically hazardous areas as permitted by FWCC Section 22-1286. Lakehaven Utility District approval is required for extension and connection to water and sewer utilities, and other utility connections and permits are required by the individual utility providers. 11-12. Concur with the checklist. B. ENVIRONMENTAL ELEMENTS 1. Earth a. The subject site is approximately 250 — 300 feet landward of the Puget Sound shoreline. The site is mapped as a geologically hazardous area on the City's critical areas map. Specifically, the area is mapped as a landslide hazard area and erosion hazard area. The slope on the site ranges from approximately 20 percent to 33 percent on the site. Overall the site slopes down from the east to the west a total of approximately 40 feet in elevation. The City of Federal Way Critical Area map reveals that the site is located in a critical area relative to landslide hazard and erosion hazards. The site meets the FWCC Section 22-1 Final Staff Evaluation for Environmental Checklist File 06-100651-SE / Dom LD. 35428 Martin Single -Family Residence Environmental Review Page 2 definition of Landslide Hazard Area (under Geologically Hazardous Area definition) as follows: 1) Site contains slopes over 15 percent (see ESM Civil site plan); 2) Soils include permeable sediment, sand and gravel, overlying relatively impermeable sediment or bedrock, typically silt and clay (see Engineering Services Report dated 4-2-02 page 10 under "General, and see soil logs in Appendix A"). 3) Site has seeps and springs (See Engineering Services Report dated 4-2-02 page 5). The FWCC Critical Areas article regulates development activities and land surface modifications on or within 25 feet of a geologically hazardous area. See the geotechnical reports identified above for a full discussion on the site soils, slope, and recommended measures to minimize adverse impacts. Pursuant to FWCC Section 22- 1286, the geotechnical reports are intended to provide analysis of site conditions and provide recommendations for site development and building construction. The geotechnical report and updates provided by the applicant conclude that the site is suitable for development of a single-family residence and associated improvements, provided the engineer's recommendations are implemented. The proposal should not have an adverse impact on the subject property and adjacent areas provided the earthwork is performed in accordance with geotechnical recommendations. Implementation of measures identified in the SEPA checklist including: erosion control measures; implementation of a drainage system; construction during the dry season; revegetation of disturbed areas; implementation of the geotechnical recommendations; and compliance with applicable code requirements will adequately mitigate development - related earth impacts with no further mitigation required. 2. Air a. Short-term impacts to air quality during construction activity will contribute to carbon monoxide levels through operation of construction machinery, delivery equipment and materials, and worker access to the site by automobile. These activities also involve emissions of hydrocarbons and oxides of nitrogen, potentially elevating the level of photochemical oxidants, such as ozone, in the ambient air. Longer term use -related impacts will vary in level, based on traffic generation and residential fireplaces or wood burning stoves, but are not expected to result in significant adverse impacts beyond that normally associated with a residential -use environment. Long-term impacts, due to automobile emissions, will vary in level according to the amount of traffic generated by future residents and visitors. b-c. Concur with the checklist. Compliance with local, state, and federal air quality standards is expected to provide sufficient mitigation of potential impacts. 3. Water a. Surface 1. Concur with the checklist. There are no known wetlands on or within 200 feet of the site. The subject site has some seeps and springs as noted in the geotechnical reports. 2-6. No impacts are anticipated provided the site development complies with the geotechnical engineer recommendations. Compliance with local, state, and federal Final Staff Evaluation for Environmental Checklist File 06-10065 1 -SE/ D.0 i D 35428 Martin Single -Family Residence Environmental Review Page 3 water runoff standards is expected to provide sufficient mitigation of potential impacts. No additional mitigation is required. b. Ground 1 &2. Concur with the checklist. C. Water Runoff (including stormwater) 1. Concur with the checklist. Stormwater drainage from the roof and footing drains will be collected from the site and conveyed to a new storm drainage system being constructed in conjunction with a new single-family residence at the site. 2. Concur with the checklist. No waste materials are anticipated to enter the ground as a result of the proposal; therefore, no mitigation is necessary. d. Concur with the checklist. Storm drainage facilities are required to be designed in accordance with the King County Surface Water Design Manual (KCSWDM), as amended by the City of Federal Way. The City anticipates that a condition of the GHA decision may require placing storm drainage pipes above ground in areas exceeding 30 percent slope, in order to minimize potential erosion impacts. 4. Plants Concur with the checklist. The site will be landscaped following construction of the new residence. The applicant must comply with the significant tree preservation and replacement standards contained in the FWCC. Compliance with local, state, and federal regulations will provide sufficient mitigation of potential impacts. 5. Animals a. Bald Eagles have been observed and are known to be on or near the subject site. b. The Bald Eagle is classified as a protected species. Chinook salmon are present in Puget Sound approximately 300 feet from the site. C. The site is part of the Pacific Flyway. d. No impacts to animals are anticipated. Compliance with local, state, and federal regulations will provide sufficient mitigation of potential impacts. 6. Energy and Natural Resources a-c. Concur with the checklist. No significant adverse energy and natural resource impacts are anticipated; therefore, no mitigation measures are necessary. 7. Environmental Health a. Concur with the checklist. b. Concur with the checklist. Pursuant to code requirements, construction hours will be limited to weekday, daylight hours to mitigate the impacts of construction noise. Compliance with state and local noise standards will provide sufficient mitigation of impacts. Final Staff Evaluation for Environmental Checklist File 06-100651-SE / nog. i.n. 35428 Martin Single -Family Residence Environmental Review Page 4 8. Land and Shoreline Use a-d. Concur with the checklist. e. The Federal Way zoning is RS 15.0. f. The Federal Way Comprehensive Plan designation is Medium -Density Single -Family. g-1. Concur with the checklist. As part of the proposal, the Community Development Director must issue an administrative Geologically Hazardous Area (GHA) determination pursuant to FWCC Section 22-1286 allowing land surface modification within the geologically hazardous area. Compliance with applicable code requirements and compliance with recommendations from the applicant's geotechnical engineer will mitigate potential land and shoreline impacts resulting from the proposal. Housing a-c. Concur with the checklist. No impacts will result from the proposal; therefore, no mitigation is necessary. 10. Aesthetics The zoning code allows a maximum height of 30 feet above average building elevation, not 35 feet as identified in the applicant's SEPA checklist. Views from off -site areas should not be altered or obstructed as a result of the proposed action. Compliance with code requirements will mitigate any aesthetic impacts. 11. Light and Glare Concur with the checklist. Typical levels of light and glare normally associated with residential use and corresponding traffic is anticipated. 12. Recreation The proposed action will not result in any impacts to recreation; therefore, no mitigation is necessary. 13. Historic and Cultural Preservation The Washington State Department of Archeology and Historic Preservation has record of an archeological site in the Lakota Beach area. In addition to the recorded site, a cultural resource site has recently been found in the Lakota Beach area. The subject property is located within approximately 300 feet of the shoreline of Puget Sound, no -bank shoreline exists in the area, and the site is in close proximity to the two above -referenced cultural resource sites. There is a potential for the presence of historic cultural resources at the site, based on the presence of other known cultural resources in the nearby vicinity. Federal Way's 2004 Comprehensive Plan Policies adopted by Federal Way, and contained within the 2003 FWCP, serve as a basis for the exercise of substantive SEPA authority to approve, condition, or deny proposed actions applicable to potential adverse environmental impacts resulting from this project. The following components of the FWCP support the conditions for the development. LUP 54 - Unique and fragile areas of the shoreline should be protected from uses or activities that will have an adverse effect on the land or water environment. Final Staff Evaluation for Environmental Checklist File 06-100651-SE / m. I n 35428 Martin Single -Family Residence Environmental Review Page 5 LUG 15 — Use historic resources as an important element in the overall design of the City. LUP 193 — Safeguard and manifest Federal Way's heritage by preserving those sites, buildings, structures, and objects, which reflect significant elements of the City's history. These policies serve as a basis for requiring the following SEPA conditions to minimize identified potential adverse transportation impacts: Mitigation Measure In order to mitigate for potential impacts to cultural resources, a professional archeologist shall monitor grading and excavation of the site. Prior to issuance of a construction permit, the applicant shall provide the City with an executed scope of work for archeological monitoring by a qualified consultant. Before issuance of a certificate of occupancy for the residence, an archeological resources monitoring report shall be submitted to the State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way. If archeological resources are encountered, work should pause, and the owner and/or agent shall notify the Washington State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way Department of Community Development Services 14. Transportation The proposed action of construction of one single-family residence will result in a nominal addition of traffic to the site and vicinity. The vehicular trips generated by a new single-family residence will not exceed the City's traffic mitigation threshold of ten PM peak hour trips; therefore, no mitigation is necessary. 15. Public Services Concur with the checklist. The proposed action will not result in any additional public service impacts; therefore, no mitigation is necessary. 16. Utilities Concur with the checklist. Urban utilities are available to the site, subject to applicable developer extension agreements and approvals by applicable agencies. The proposed action will not result in any additional impacts to utilities; therefore, no mitigation is necessary. CONCLUSION The lead agency for this proposal has determined that the proposed action does not have probable significant adverse impact on the environment and an Environmental Impact Statement (EIS) is not required under RCW 43.2 1 C.032(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. The information is available to the public upon request. The City reserves the right to review any future revisions or alterations to the site or the proposal in order to determine the environmental significance or nonsignificance of the project at that point in time. Prepared By: Jim Harris, Senior Planner Date Prepared: March 29, 2006 Final Staff Evaluation for Environmental Checklist File 06-100651-SE / Doc I D 35428 Martin Single -Family Residence Environmental Review Page 6 Your Community Newspaper Affidavit of Publication Debbie Kaufman, being first duly sworn on oath, deposes and says that she is the Publisher of The Federal Way Mirror, a semi -weekly newspaper. That said newspaper is published in the English language continually as a semi -weekly newspaper in Federal Way, King County, Washington, and is now and during all of said time has been printed in an office maintained'at the aforementioned place of publication of said newspaper. That the annexed is a true copy of a legal advertisement placed by City of Federal Way L-1034 as it was published in regular issues (and not in supplemental form) of said newspaper once each week for a period of one consecutive week(s), commencing on the 1 st day of April, 2006 , and ending on the 1 st day of April, 2006, both dates inclusive, and that such newspaper was regularly distributed to its readers during all of said period. That the full amount of the fee charged for the foregoing publication is the sum of 106..24 which amount has been paid in full, or billed at the legal rate according to RCW 65.16.090 Subscribed to and sworn before me this 1 lth day of April, 2006. Notary Public in and for the State of Washington, Residing at Federal Way ���ttttf � � i rrr►►►► ■ p118 Lt 1414 SO. 324TH STREET, SUITE 8210, FEDERAL WAY, WA 98003 0 253-925-5565 0 FAX: 253-925-5750 CITY OF FEDERAL WAY NOTICE OF ENVIRONMENTAL MITIGATED DE"f ERMtNATiON OF NONSIGNIFICANCE MARTIN RESIDENCE Federal Way File No. 0&-100651-00-SE The City of Federal Way has determined that the following project does not have a prob- able significant adverse impact on the envi- ronment, and an Environmental Impact Statement (EIS) is not required under RCW 43.21 C.030{2)(c). This decision was made after review of a completed environmental checklist and other information on file will, the City. Proposed Action. Construction of a new single-family residence and associated site improvements on a presently undeveloped lot. within a geologically hazardous area. Applicant: Michael and Pamela Martin 2800 SW 300th Place Federal Way, WA 98003 Agent: ESM Consulting Engineers Enc t.aBrie 33915 1st Way South, Suite 200 Federal Way. WA 98003 Location: 2804 SW 300th Place, Federal Way, Washington (tax lot number 012103- 9130) Lead Agency: CiV of Federal Way Mitigation Measure: In order to mitigate for potential impacts to cultural resources, a pro- fessional archeologist shall monitor grading and excavation of the site. Prior to issuance of a construction permit, the applicant shall provide the City with an executed scope of work for archeological monitoring by a quali- fied consultant. Before issuance of a oert'rfi- cate of Occupancy for the residence, an ar- cheological resources monitoring report shall be submitted to the State Office of Archeolo- gy and Historic Preservation. affected Native American Tribe(s), and the City of Federal Way. If archeological resources are encoun- tered, work should pause, and the owner andlor agent shall notify the Washington State Office of Archeology and Historic Pres- ervation, affected Native American Tribe(s), and the City of Federal Way Department of Community Development Services. Further information regarding this action is available to the public upon request at the Federal Way DepartrneF.t of Community De- velopment, Federal Way City hall, 33325 8th Avenue South, Federal Wi4y, WA 98003. Contact: Jim Harris, Senior Planner, Phone: 253.835-264t. This MDNS is t5s'.led under WAG 197-11-340(2). Comments must be submitted by 5:00 p.m. on April 17, 2C06_ Un- less modified by the City, this determ'- ition will become final following the above ca:n ment deadline. Any person aggrieved of the Cil 's final determination may file an appeal Witt the City within 14 days of the above comment deadline. FWM#-1034 Date of publication: 04/01/06 y'y, 40k CITY Federal a. Way DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES 33325 81h Avenue South PO Box 9718 Federal Way WA 98063-9718 253-835-7000;Fax 253-835-2609 www.cityoffederalway.com DECLARATION OF DISTRIBUTION I, 1 — hereby declare, under penalty of perjury of the laws of the State of Washington, that a. ❑ Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice ❑ Notice of Environmental Determination of Nonsignificance (SEPA, DNS) ® Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) ❑ Notice of Land Use Application & Anticipated DNS/MDNS ❑ FWCC Interpretation ❑ Other ❑ Land Use Decision Letter ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Permit ❑ Adoption of Existing Environmental Document was R mailed ❑ faxed ❑ e-mailed and/or ❑ posted to or at each of the attached addresses on M ?, Irk ?�, t 2006. Project Name 1` 1etGSA J e NC le File Number(s) -St Signature Date K:\CD Administration Files\Declaration of Dislribution.doc/Last printed 3/31/2006 11:45:00 AM 41k CITY OF Federal Way MITIGATED ENVIRONMENTAL DETERMINATION OF NONSIGNIFICANCE MARTIN RESIDENCE Federal Way File No: 06-100651-00-SE Description of Proposal: Construction of a new single-family residence and associated site improvements on a presently undeveloped lot, within a geologically hazardous area. Applicant: Michael and Pamela Martin 2800 SW 300"' Place Federal Way, WA 98003 Agent: ESM Consulting Engineers Eric LaBrie 33915 1"Way South, Suite 200 Federal Way, WA 98003 Location: 2804 SW 300'h Place, Federal Way, Washington (tax lot number 012103-9130) Lead Agency: City of Federal Way The Responsible Official of the City of Federal Way hereby makes the following Findings of Fact based upon impacts identified in the Environmental Checklist; Final Staff Evaluation for Environmental Checklist, Federal Way File No. 06-100651-SE; Conclusions of Law based upon the 2004 Federal Way Comprehensive Plan (FWCP); and other policies, plans, rules, and regulations designated as a basis for exercise of substantive authority under the Washington State Environmental Policy Act Rules pursuant to RCW 43.21 C.060. FINDINGS OF FACT The proposal is to construct a two-story, 2,435 square -foot single-family residence on an undeveloped lot in the Lakota Beach neighborhood. Development of the site will include improvements typically associated with a single-family residence including but not limited to the following: driveway, utilities, and landscaping. 2. The Washington State Department of Archeology and Historic Preservation has record of an archeological site in the Lakota Beach area. In addition to the recorded site, a cultural resource site has recently been found in the Lakota Beach area. The subject property is located within approximately 300 feet of the shoreline of Puget Sound, no -bank shoreline exists in the area, and the site is in close proximity to the two above -referenced cultural resource sites. The subject property is mapped as a geologically hazardous area. The on -site soils and the geologic conditions are evaluated in the following documents submitted to the City with the application: Engineering Geological Services April 2, 2002 report, Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC dated October 10, 2005; Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC dated January 27, 2006; Updated Geotechnical Engineering Report by Pacific Geo Engineering LLC dated March 15, 2006. The reports conclude that the site is capable of being developed with a single-family residence, provided the geotechnical engineering recommendations are followed. 4. The Final Staff Evaluation for Environmental Checklist, Federal Way File Number 06-100651-00-SE is hereby incorporated by reference as though set forth in full. CONCLUSIONS OF LAW Federal Way's 2004 Comprehensive Plan Policies adopted by Federal Way, and contained within the 2003 FWCP, serve as a basis for the exercise of substantive SEPA authority to approve, condition, or deny proposed actions applicable to potential adverse environmental impacts resulting from this project. The following components of the FWCP support the conditions for the development. LUP 54 — Unique and fragile areas of the shoreline should be protected from uses or activities that will have an adverse effect on the land or water environment. LUG 15 — Use historic resources as an important element in the overall design of the City. LUP 193 — Safeguard and manifest Federal Way's heritage by preserving those sites, buildings, structures, and objects, which reflect significant elements of the City's history. The lead agency for this proposal has determined that the proposed action does not have probable significant adverse impact on the environment, and an Environmental Impact Statement (EIS) is not required under RCW 43.21 C.032(2)(c), only if the following condition is met. 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. CONDITION In order to mitigate for potential impacts to cultural resources, a professional archeologist shall monitor grading and excavation of the site. Prior to issuance of a construction permit, the applicant shall provide the City with an executed scope of work for archeological monitoring by a qualified consultant. Before issuance of a certificate of occupancy for the residence, an archeological resources monitoring report shall be submitted to the State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way. If archeological resources are encountered, work should pause, and the owner and/or agent shall notify the Washington State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way Department of Community Development Services. This MDNS is issued under Washington Administrative Code (WAC) 197-11-340(2); the lead agency will not act on this proposal for 14 days from the date of issuance. Comments must be submitted no later than 5:00 p.m. on April 17, 2006. 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. Mitigated Environmental Determination of Nonsignificance Page 2 Martin Residence No: 06-100651-00-SE / me LD_ 35592 Contact: Jim Harris, Senior Planner, 253-835-2641 Department of Community Development Services Responsible Official: Kathy McClung Position/Title: Community Development Services Director Address: 33325 80` Avenue South, PO Box 9718, Federal Way, WA 98063-9718 Date Issued: April 1, 2006 Signature: Mitigated Environmental Determination of Nonsignificance Martin Residence Page 3 No: 06-10065 1 -00-SE / Doc. i.o. 35592 Map Output Page 1 of 2 * King County I WAP - Property Information 1 triz0 9D{a Puget Sound n�9� Qt3tl /JIJ3�530 0270 7 9034 Jt?i5 , E 04 85 0176 9105 omo tltss 7 W3 o2J3 - �J 02'J f• r.-"�" mC1.(' fn LA3h0 •172�1i;.417.� tWs 0320 r 0285, 033 0315 tl337 1 54go 9'tl1 255 �. . .1 y 0370 4J9! j 0780 Qi69tl A240, 037 977E U.. t7770 0362 5Nt30 't 0727 9770 C LrQlQ Sy �� Yet �9p73 '• �i 4 afl f � 1 + �r 900" j 9763 O f72 t {j F — a, �A DtlBS 003 �' �'-_ 41t9S �`•bD35�� � f Q03J I�r Qtig 9138� tC) 7D633Kinq County 5 t — Legend l-i 5eiacted Pat als. Zoning Labels l Courtly Boundary Zeroing ON R-48, tisdzf'24 .J r---=c X Mountain Peaks -1Q• p rsrJ rs. �'J x t0 ez N3-?1c. �zsd r m Streets A,35,r4a-iri.. d,wve_GU;w35=Cs ® Co-CGMmu tYEkwn Ra • Raj 0-d BXc K= -- ® © • r7Eee Forest Frndary `JuctionDhlrirt RA•5-R-wzfktu,wonjaI;w5=m � 0aw RA, r0<;,avr5v,a J W tom Incorporated Area AgriculluralProduction District iA-5J. 7-1 .e,ceic-DAJt 3 r r f Boundary R• t , �r�i�-rF�,�v ccw,�;J 9c :ram R,�..�d�ef,zClc Urttan Gtaa'lir Area Line D R'a-R yi'f_ ,r3C`J�swc Lakes and Large Rivers R•a*Aez&4& err Aoup&acc f Streams Mucktesttoot Tribe j'- R- rD • i2cs'x4�-f.3, T"J O+J ems• :�-F �7 Parcels L_�I ;crrkz information included on this map has been compiled by King County staff from a variety of sources and is subject to change without notice. County makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such httn://www5.m etroke- gov/servl etJcom _esri . esi i m an_Esrim an?S erviceName=overview&C1 i en... 2/6/2006 MA 2Ti N 'S PA ckeC- s k I , F2MA US ARMY C RPS/ENGINEERS JOE HENRY REGION 10 NTH DIV ATTN REGULATORY BRANCH NATURAL RESOURCES CVN SVC 130 228T" ST SW PO BOX 3755 935 POW ELL AVE SW BOTHELL WA 98021-9796 SEATTLE WA 98124 RENTON WA 98055 EPA DEPT OF ECOLOGY WSDOT ENVIRONMENTAL AFFAIRS ENVIRONMENTAL REVIEW SEC ENVIRONMENTAL REVIEW SEC 1200 6T" AVE MD-126 PO BOX 47703 REGULATORY COMPLIANCE SEATTLE WA 98101 OLYMPIA WA 98504-7703 PO BOX 47331 OLYMPIA WA 98504-7331 PLANNING/OPERATIONS MANAGE JAMEY TAYLOR WA NATURAL HERITAGE SNO-KING AREA DNR SEPA CENTER DNR WSDOT SOUTH KING COUNTY PO BOX 47015 PO BOX 47014 PO BOX 330310 MS 240 OLYMPIA WA 98504-7015 OLYMPIA WA 98504-7014 SEATTLE WA 98133-9710 OFFICE OF ARCHAEOLOGY WA STATE DEPT WILDLIFE RANDY PEARSON HISTORIC PRESERVATION 600 CAPITOL WAY N WASH STATE PARKS 4 PO BOX 48343 OLYMPIA WA 98501-1091 PO BOX 42668 OLYMPIA WA 98504-8343 OLYMPIA WA 98504-2668 JULIE STOFEL TRAVIS NELSON LARRY FISHER WDFW WDFW WDFW REGION 4 OFFICE PO BOX 73254 600 CAPITOL WAY N 16018 MILL CREEK BLVD PUYALLUP WA 98373 OLYMPIA WA 98501-1091 MILL CREEK WA 98012 US FISH & WILDLIFE SERVCE DOH - DIV OF DRINKING WATER PUGET SOUND AIR 510 DESMOND DR SE #102 ENV DOCUMENTS REVIEWER POLLUTION CONTROL AGENCY LACEY WA 98503 PO BOX 47822 110 UNION ST STE 500 OLYMPIA WA 98504-7822 SEATTLE WA 98101-2038 PORT OF TACOMA PSRC ENVIRONMENTAL DEPT PORT SEATTLE GROWTH MANAGEMENT DEPT SE W PO BOX 1837 BOX 1 1 1011 WESTERN AVE #500 TACOMA WA 98401-1837 SEATTLE WA 98111 SEATTLE WA 98104-1040 SHIRLEY MARROQUIN GARY KRI EDT PERRY WEINBERG KC WASTEWATER TREATMENT KING COUNTY TRANSIT DIV SOUND TRANSIT MS KSC-NR-0505 ENV PLANNING MS KSC-TR-0431 401 S JACKSON ST 201 S JACKSON ST 201 S JACKSON ST SEATTLE WA 98104-2826 SEATTLE WA 98104-3855 SEATTLE WA 98104-3856 MARK CARY SOUTH KING COUNTY KING COUNTY PARKS LAND US SVC KCDDES REGIONAL WATER ASSOCIATION PROPERTY MANAGEMENT 900 OAKESDALE AVE SW 27224 144T" AVE SE PO BOX 3517 RENTON WA 98055-1219 KENT WA 98042 REDMOND WA 98073-3517 KC BOUNDARY REVIEW BOARD ROD HANSEN SOLID WASTE DIV SEATTLE/KING COUNTY 810 THIRD AVE STE 608 KING CO DEPT OF NATURAL RES DEPT OF PUBLIC HEALTH SEATTLE WA 98104-1693 201 S JACKSON ST STE 701 1404 CENTRAL AVE S STE 101 SEATTLE WA 98104-3855 KENT WA 98032 ViTY OF BURIEN CITY OF FIFE TERRY LUKENS CITY HALL 5411 23RD ST E BELLEVUE COUNCIL OFFICE 415 SW 150T" ST FIFE WA 98424 PO BOX 90012 BURIEN WA 98166-1957 BELLEVUE WA 98009-9012 WATER DISTRICT #54 HIGHLINE WATER DISTRICT MIDWAY SEWER DISTRICT 922 S 219T" ST PO BOX 3867 PO BOX 3487 DES MOINES WA 98198-6392 KENT WA 98032-0367 KENT WA 98032 WATER DISTRICT #111 COVINGTON WATER DISTRICT PAT PROUSE QW EST 27224 144T" AVE SE 18631 SE 300T" PL T" KENT WA 98042-9058 KENT WA 98042-9208 S EAT 7 AVE RM 120E SEATTLE WA 98121 LORI KITTREDGE MARY AUSBURN JILL GASTON REALTY SPEC METRO TRANSIT PSE BPA KSC-TR-0413 6905 S 228T" ST SKC-SVC 914 AVE "D" 201 S JACKSON ST KENT WA 98032 SNOHOMISH WA 98290 SEATTLE WA 98104-3856 WASH ENVIRON COUNCIL CHRIS CARREL TIM PAYNE 615 2"D AVE STE 380 FRIENDS OF THE HYLEBOS PIERCE COUNTY TRANSIT SEATTLE WA 98104-2245 PO BOX 24971 PO BOX 99070 FEDERAL WAY WA 98093 LAKEWOOD WA 98499 SAM PACE LEAGUE OF WOMEN VOTERS FW COMMUNITY COUNCIL SEA/KING CO ASSOC/REALTORS OF SOUTH KING COUNTY PO BOX 4274 29839 154T" AVE SE 800 SW 152"D FEDERAL WAY WA 98063 KENT WA 98042-4557 SEATTLE WA 9816E MICHAEL FELDMAN WASH STATE OCD ATTN NEWSROOM AVIATION PLANNING SEATAC 901 COLUMBIA ST SW TACOMA NEWS TRIBUNE PO BOX 68727 OLYMPIA WA 98504-8300 1950 S STATE ST SEATTLE WA 98168-0727 TACOMA WA 98405 JACK HOPKINS LISA PEMBERTON-BUTLER FEDERAL WAY NEWS SEATTLE PI SEATTLE TIMES NORTH RD 101 ELLIOTT AVE W 1200 112T" AVE NE STE C145 133 SW 153 ST SEATTLE WA 98121 BELLEVUE WA 98004-3748 BURIEN WA 98166 ERICA JAHN SOUTH COUNTY JOURNAL JOHN KIM FEDERAL WAY MIRROR KOREA POST 1414 S 324T" STE B-210 PO BOX W 1398035-0130 28815 PACIFIC HWY S STE 4B FEDERAL WAY WA 98003 KENFEDERAL WAY WA 98003 KING COUNTY ASSESSORS KATHY REED CITY OF EDGEWOOD 500 4T" AVE RM 700 OLYMPIC PIPELINE CO 2221 MERIDIAN AVE E SEATTLE WA 98104 2319 LIND AVE SW EDGEWOOD WA 98371-1010 RENTON WA 98055 KING CO ROADS DIVISION COUNTY ROADS ENGINEER 155 MONROE AVE NE RENTON WA 98056 GERI WALKER FWSD 31405 18T" AVE S FEDERAL WAY WA 98003 FWFD FW CHAMBER OF COMMERCE 31617 1 ST AVE S PO BOX 3440 FEDERAL WAY WA 98003 FEDERAL WAY WA 98063 COMCAST CABLE STORE ,W kmUCKLESHOOT INDIAN TRIBE T" h PLANNING DEPT 1414 324S 1 C t� 39015 172ND AVE SE FEDERAL WAY WA 98003 ` AUBURN WA 98002 PUYALLUP TRIBE 1850 E ALEXANDER AVE TACOMA WA 98421-4105 PIERCE COUNTY HEALTH DEPT 3629 S "D" ST TACOMA WA 98408 PLANNING & CD DEPT CITY OF AUBURN 25 W MAIN ST AUBURN WA 98001 KENT CITY HALL PLANNING DEPT 220 4T" AVE S KENT WA 98032 NE TAC NEIGHBORHOOD COUNCIL C/O JAMES COLBURN TACOMA ECONOMIC DEV 747 MARKET ST RM 900 TACOMA WA 98402-3793 CRAIG GIBSON TACOMA PUBLIC UTILITIES PO BOX 11007 TACOMA WA 98411 PIERCE CO PLNG & LAND SVCS RESOURCE MANAGEMENT 2401 S 35T" ST TACOMA WA 98409-7460 PIERCE COUNTY BOUNDARY REVIEW BOARD 2401 S 35T" ST TACOMA WA 98409 CITY CLERK PACIFIC CITY HALL 100 THIRD AVE SE PACIFIC WA 98047 CITY OF TACOMA BLUS LAND USE ADMINISTRATOR 747 MARKET ST STE 345 TACOMA WA 98402-3769 MARION WEED CHAIR NORTHEAST TACOMA NEIGHBORHOOD COUNCIL 4735 NE 42ND ST TACOMA WA 98422 CITY OF LAKEWOOD 10510 GRAVELLY LK DR SW STE 206 LAKEWOOD WA 98499-5013 LAKEHAVEN UTILITY DIST - PO BOX 4249 FEDERAL WAY WA 98063 FEDERAL WAY DISPOSAL PO BOX 1877 AUBURN WA 98071 PUYALLUP INTERNATIONAL ll 3-702 MARINE VIEW DR, #200 �ACOMA WA 98422-2799 PIERCE CO PLNG & LAND SVCS DEVELOPMENT ENGINEER 2401 S 35T" ST TACOMA WA 98409-7460 AUBURN SCHOOL DISTRICT 915 FOURTH NE AUBURN WA 98002 PUBLIC WORKS DIRECTOR ALGONA CITY HALL 402 WARDE ST ALGONA WA 98001-8505 JOE ELTRICH TACOMA WATER DIVISION PO BOX 11007 TACOMA WA 98411 HAYES ALEXANDER PLNG CHAIR NORTHEAST TACOMA NEIGHBORHOOD COUNCIL 5308 RIDGE DR NE TACOMA WA 98422 CITY OF MILTON 1000 LAUREL ST MILTON WA 98354 CITY OF SEATAC CITY OF DES MOINES CITY OF NORMANDY PARK 4800 S 188T" ST 21630 11T" AVE S 801 SW 174T" ST SEATAC WA 98188 DES MOINES WA 98198 NORMANDY PARK WA 98166 MHACC CRESTVIEW SHORECLUB ASSN C/O WILLIAM HICKS MIRROR LKTRESIDENTS ASSN 4817 SW 310 TH 525 SW 312 ST FEDERAL WAY WA 98023 29219 7 PL S FEDERAL WAY WA 98023 FEDERAL WAY WA 98003 NORTH LAKE COMNTY CLUB WEST GREEN CONDO ASSN REDONDO COMMUNITY CLUB 33228 38T" AVE S 432 S 321ST PL PO BOX 5118 AUBURN WA 98001 FEDERAL WAY WA 98003 REDONDO WA 98054 STEEL LK RESIDENTS ASSN BARCLAY PLACE HOA BELMOR PARK HOA 2329 S 304T" ST 1034 SW 334T" 2101 S 324T" ST FEDERAL WAY WA 98003 FEDERAL WAY WA 98023 FEDERAL WAY WA 98003 BELLACARINO WOODS HOA BELLRIDGE TOWNHOMES HOA CAMPUS GLEN HOA 35204 6T" AVE SW 1438 S 308T" LN 32806 6T" PL S FEDERAL WAY WA 98023 FEDERAL WAY WA 98003 FEDERAL WAY WA 98003 TWIN LAKES HOA MAR CHERI COMNTY CLUB BROOKLAKE COMNTY CENTER 3420 SW 320TI ST # 28 PO BOX 25281 726 S 356T" FEDERAL WAY WA 98023 FEDERAL WAY WA 98023 FEDERAL WAY WA 98023 KEN SHATOCK COMCAST - SE PUGET SOUND ARE GROUSE POINTE HOA 2613 KINGSGROVE HOA CONSTRUCTION/ENG MANAGER 2613 S 379 1911 SW CAMPUS DR # 621 FEDERAL WAY WA 98003 4020 AUBURN WAY N FEDERAL WAY WA 98023 AUBURN WA 98002 MASTER BLDGS ASSOC HISTORIC PRESERVATION DEPT 333 116T" AVE SE PUYALLUP TRIBE BELLEVUE WA 98004-6407 1850 ALEXANDER AVE 1 TACOMA WA 98421 Revised January 11, 2006 KAEnvironmental ChecklistsWgency Mailing List.doc OFFICE OF ARCHAEOLOGY & DEPT OF ECOLOGY LAKEHAVEN UTILITY DIST HISTORIC PRESERVATION ENVIRONMENTAL REVIEW SEC PO BOX 4249 PO BOX 48343 PO BOX 47703 FEDERAL WAY WA 98063 OLYMPIA WA 98504-8343 OLYMPIA WA 98504-7703 PUYALLUP TRIBE 1850 E ALEXANDER AVE TACOMA WA 98421-4105 HISTORIC PRESERVATION DEPT PUYALLUP TRIBE 1850 ALEXANDER AVE TACOMA WA 98421 MUCKLESHOOT INDIAN TRIBE PLANNING DEPT 39015 172ND AVE SE AUBURN WA 98002 PUYALLUP INTERNATIONAL 3702 MARINE VIEW DR, #200 TACOMA WA 98422-2799 E CITY OF Federal 'Way DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES 33325 8th Avenue South PO Box 9718 Federal Way WA 98063-9718 253-835-7000;Fax 253-835-2609 www.cityoffederalway.,com DECLARATION OF DISTRIBUTION I, x) hereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice ❑ Notice of Environmental Determination of Nonsignificance (SEPA, DNS) Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) ❑ Notice of Land Use Application & Anticipated DNS/MDNS ❑ FWCC Interpretation ❑ Other ❑ Land Use Decision Letter ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Permit ❑ Adoption of Existing Environmental Document was mailed ❑ faxed ❑ e-mailed and/or ❑ posted to or at each of the attached addresses on t �rcL '--� I 2006. Project Name File Number(s) (9 -10 D 6 s 1 r S E Si nature _E5-7�Date S - ) K:\CD Adminiskalion Files\Declaration of Distribution.doc/Last printed 3/31/2006 11:45:00 AM 4ik CITY OF Federal Way NOTICE OF ENVIRONMENTAL MITIGATED DETERMINATION OF NONSIGNIFICANCE MARTIN RESIDENCE Federal Way File No: 06-100651-00-SE The City of Federal Way has determined that the following project does not have a probable significant adverse impact on the environment, and an Environmental Impact Statement (EIS) is not required under RCW 43.21 C.030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the City. Proposed Action: Construction of a new single-family residence and associated site improvements on a presently undeveloped lot, within a geologically hazardous area. Applicant: Michael and Pamela Martin 2800 SW 300th Place Federal Way, WA 98003 Agent: ESM Consulting Engineers Eric LaBrie 33915 lst Way South, Suite 200 Federal Way, WA 98003 Location: 2804 SW 300th Place, Federal Way, Washington (tax lot number 012103-9130) Lead Agency: City of Federal Way Mitigation Measure: In order to mitigate for potential impacts to cultural resources, a professional archeologist shall monitor grading and excavation of the site. Prior to issuance of a construction permit, the applicant shall provide the City with an executed scope of work for archeological monitoring by a qualified consultant. Before issuance of a certificate of occupancy for the residence, an archeological resources monitoring report shall be submitted to the State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way. If archeological resources are encountered, work should pause, and the owner and/or agent shall notify the Washington State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way Department of Community Development Services. Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development, Federal Way City Hall, 33325 8th Avenue South, Federal Way, WA 98003. Contact: Jim Harris, Senior Planner, Phone: 253-835-2641. This MDNS is issued under WAC 197-11-340(2). Comments must be submitted by 5:00 p.m. on April 17, 2006. 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. Published in the Federal Way Mirror on April 1, 2006. 06-100651 Doc I.D. 35593 Map Output Page 1 of 2 0 King County WAP - Property Information 4�99 ! rJ D 120 4 f� P laget Sound 0130 11115 �- J150 0140 f Ova � � 252 493•f !1165 OJ55 ` 9170 9289 41 3 n1SeQ 0105 • . 0749 U290 ! 093 t L StJ92 �14 •. 0379 474 and +em 0335 61 ! O33�Jt S"�7 4193 0326 0228 in r r aYom II38r 0/ 2'75 it771#% t DBif� r o3i0 .S 10 �995 0240. 0315 .09�fi �,i 1NVrp VUi9 0320 9010 0275r s Lines 901 J 0470 ati 7 � i rt• �' 'sass. �+ od7- 0460 �. °m d' 0473 oQ85 W 0030 (i VI All n 511t8 GL73 17 �- Pilo 99tB 41:fi jCf 20ir5ICmgCavaty .; y f� 1 ,6flSlt�S; __� 91371 Legend Selected Parcels Zoning Labels rt as.. gs�w,2_�J aye County Boundary Zoning ® R,4a P?, 44.e-)Oi;k-- a X Mountain Peaks A,1i.AV--m txr ,,, aw OU pe Ides +13. Neg3�ai�i�ri, s Streets /4.:t5 mi. ftC4Ww_£U0--,35awes � Cs•CtM"tstff�r'_K r4y�F il�u�rr ,�F . r Fa 1=4 n R3• Ragar& Bsxrrses > AY9Ct4t ' i U A4stcr�. F-I A - 05W •,� ' tx+ . �J RA,25-,RrS;Ate3,anDIJpar ;L1 l.rd•g' Disfri-1 Rr� 5 Rrs;A,a :J�c ss a� �'� Forest Production Boundary 0 ®} RA�to�Rrx�-eil.am DOpa, 1q.4--as iIrto7rpolafedAr$a i rYr Agricultural Production District UR-RJ;sa�R� ,sxry J S f'r Bounds ry R• 1 • ResaLr.r. am 7',1 px sac Urban GmN%lh Area tine R= •.t. d sf�.� l n c g.g - #ic�dst:r 3 21t1 y� �c ❑ takes and Large Rivers - ;l-a itc!idk.xr&.8O-il p& =e 5tsea ms >'-- R-12. R=d r-1,12 7.4J w axe hluckSesboolTn')u R.la•Res r ,Iaali Pamets information included on this map has been compiled by King County staff from a variety of sources and is subject to change without notice. County makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such http://www5.metrokc. gov/ser-vlet/com. esri. esrimap.Esrimap?S er-viceName=overview&C lien... 2/6/2006 RECEIVED Property Owners Within 300' of Site FEB 0 9 2006 Parcel # Owner 12103-9014 Martin, Michael and Pamela 12103-9047 City of Federal Way 416660-0235 Burbidge, James and Jeanne 416660-0265 Oakes, Thomas and Judith 416660-0305 White, Lloyd 416660-0145 Burbidge, James 416660-0140 Fairbanks, Glen 416660-0130 Riddell, Sharon 41660-0120 Hogan, Carl and Betty 416660-0115 Hines Living Trust CRY OF F'EDE Address City BVOIIVG D 2800 SW 300th PI Federal Way WA 98023 33325 8th Ave. S.; PO Box 9718 Federal Way WA 98063 2824 SW 300th PI Federal Way WA 98003 PO Box 24831 Federal Way WA 98003 2845 SW 300th PI Federal Way WA 98023 2824 SW 300th PI Federal Way WA 98023 2820 SW 300th PI Federal Way WA 98023 2816 SW 300th PI Federal Way WA 98023 3511 124th Ave. Ct. E. Edgewood WA 98372 2808 SW 300th PI Federal Way WA 98023 CITY OF Federai ice: DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES 33325 8th Avenue South PO Box 9718 Federal Way WA 98063-9718 253-835-7000; Fax 253-835-2609 www.cifyoffederalway.com DECLARATION OF DISTRIBUTION I,�id'fP.LJ�1toP/' hereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Land Use Application/Action ❑ Land Use Decision Letter ❑ Notice of Determination of Significance (DS) and Scoping Notice ❑ Notice of Environmental Determination of Nonsignificance (SEPA, DNS) Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) ❑ Notice of Land Use Application & Anticipated DNS/MDNS ❑ FWCC Interpretation ❑ Other ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Permit ❑ Adoption of Existing Environmental Document was ❑ mailed ❑ faxed ❑ e-mailed and/or posted to or at each of the attached addresses on /+/ �) i 2006. r e-V ey 5C, Project Name 11116 " >.S1 h4l c File Number(s) C96 - /00 h 6 / - OD .- ` Z- Signature KACD Administration Flies\Declaration of Distribution.doc/Last printed 1 /23/2006 9:59 AM Date E2s9 Sites: Federal Way City Hall — 33325 gth Avenue Federal Way Regional Library — 34200 15t Way South Federal Way 320th Branch Library — 848 South 320th Street i 4% CITY OF 4: Federal lrlllay NOTICE OF ENVIRONMENTAL MITIGATED DETERMINATION OF NONSIGNIFICANCE MARTIN RESIDENCE Federal Way File No: 06-100651-00-SE The City of Federal Way has determined that the following project does not have a probable significant adverse impact on the environment, and an Environmental Impact Statement (EIS) is not required under RCW 43.21C.030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the City. Proposed Action: Construction of a new single-family residence and associated site improvements on a presently undeveloped lot, within a geologically hazardous area. Applicant: Michael and Pamela Martin 2800 SW 300`h Place Federal Way, WA 98003 Agent: ESM Consulting Engineers Eric LaBrie 33915 151 Way South, Suite 200 Federal Way, WA 98003 Location: 2804 SW 300`h Place, Federal Way, Washington (tax lot number 012103-9130) Lead Agency: City of Federal Way Mitigation Measure: In order to mitigate for potential impacts to cultural resources, a professional archeologist shall monitor grading and excavation of the site. Prior to issuance of a construction permit, the applicant shall provide the City with an executed scope of work for archeological monitoring by a qualified consultant. Before issuance of a certificate of occupancy for the residence, an archeological resources monitoring report shall be submitted to the State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way. If archeological resources are encountered, work should pause, and the owner and/or agent shall notify the Washington State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way Department of Community Development Services. Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development, Federal Way City Hall, 33325 8`h Avenue South, Federal Way, WA 98003. Contact: Jim Harris, Senior Planner, Phone: 253-835-2641. This MDNS is issued under WAC 197-11-340(2). Comments must be submitted by 5:00 p.m. on April 17, 2006. 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. Published in the Federal Way Mirror on April 1, 2006. 06-100651 Doe. LD. 35593 Subject Property Vicinity Map Parcels Subject Property N Federal Way City Limits CITY OF Note: This map is intended for use as a graphical representation only. A'G+�y The City of Federal Way makes no warranty as to its accuracy. Federal Way ,z FederalOF Way DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES 33325 8th Avenue South PO Box 9718 Federal Way WA 98063-9718 253-835-7000; Fax 253-835-2609 www.cifyoffederalwoy.com DECLARATION OF DISTRIBUTION I, � hereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice ❑ Notice of Environmental Determination of Nonsignificance (SEPA, DNS) Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) ❑ Notice of Land Use Application & Anticipated DNS/MDNS ❑ FWCC Interpretation ❑ Other ❑ Land Use Decision Letter ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Permit ❑ Adoption of Existing Environmental Document was � ❑ mailed ❑ faxed ffi e-mailed and/or ❑ posted to or at each of the attached addresses on 1` 1 �rC-LL?2 6 2006. Project Name . `' 1 Z A-' File Number(s) _ (o 6 n (. 51 E Signature Date 3 "30-0 K:\CD Administration Files\Declaration of Distribution.doc/Last printed 1 /23/2006 8:42 AM CITY OF 4A ■ ederalWay NOTICE OF ENVIRONMENTAL NIITIGATED DETERMINATION OF NONSIGNIFICANCE MARTIN RESIDENCE Federal Way File No: 06-100651-00-SE The City of Federal Way has determined that the following project does not have a probable significant adverse impact on the environment, and an Environmental Impact Statement (EIS) is not required under RCW 43.21 C.030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the City. Proposed Action: Construction of a new single-family residence and associated site improvements on a presently undeveloped lot, within a geologically hazardous area. Applicant: Michael and Pamela Martin 2800 SW 300t' Place Federal Way, WA 98003 Agent: ESM Consulting Engineers Eric LaBrie 33915 1" Way South, Suite 200 Federal Way, WA 98003 Location: 2804 SW 300ei Place, Federal Way, Washington (tax lot number 012103-9130) Lead Agency: City of Federal Way Mitigation Measure: In order to mitigate for potential impacts to cultural resources, a professional archeologist shall monitor grading and excavation of the site. Prior to issuance of a construction permit, the applicant shall provide the City with an executed scope of work for archeological monitoring by a qualified consultant. Before issuance of a certificate of occupancy for the residence, an archeological resources monitoring report shall be submitted to the State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way. If archeological resources are encountered, work should pause, and the owner and/or agent shall notify the Washington State Office of Archeology and Historic Preservation, affected Native American Tribe(s), and the City of Federal Way Department of Community Development Services. Further information regarding this action is available to the public upon request at the Federal Way Department of Community Development, Federal Way City Hall, 33325 8'h Avenue South, Federal Way, WA 98003. Contact: Jim Harris, Senior Planner, Phone: 253-835-2641. This MDNS is issued under WAC 197-11-340(2). Comments must be submitted by 5:00 p.m. on April 17, 2006. 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. Published in the Federal Way Mirror on April 1, 2006. 06-100651 Doc. I.D. 35593 Page 1 of 1 . Tamara Fix - Legal Notice From: Tamara Fix To: admin@fedwaymirror.com Date: 3/30/2006 10:02:02 AM Subject: Legal Notice CC: dgrigg@soundpublishing.com Please publish the following legal notice (Martin MDNS, 06-100651) in Saturday's (April 1, 2006) issue. Please furnish an affidavit of publication. Thank you! Tamara Fix Administrative Assistant City of Federal Way PO Box 9718 Federal Way, WA 98063-9718 253-835-2602 f e c e e g of c e g e CITY OF FEDERAL WAY DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES DEVELOPMENT REVIEW COMMITTEE TRANSMITTAL DATE: February 10, 2006 TO: Will Appleton, Development Services Manager (2 copies) Scott Sproul, Assistant Building Official Brian Asbury, Lakehaven Utility District Greg Brozek, Federal Way Fire Department FROM: Jim Harris, Senior Planner 253 835-2641 FOR DRC MTG. ON: February 23, 2006 FILE NUMBER(s): 06-100651-00-SE RELATED FILE NOS.: None PROJECT NAME: MARTIN PROJECT ADDRESS: 2804 SW 300TH PL ZONING DISTRICT: RS 15.0 PROJECT DESCRIPTION: SEPA for construction of single family -residence on vacant lotwith geologically hazardous areas LAND USE PERMITS: SEPA, GHA review PROJECT CONTACT: Michael J Martin 2800 300TH PL 2539435234 (Primary) MATERIALS SUBMITTED: Site plans SEPA checklist Geo-tech report Geo tech addendum CITY OF Federal Way FIECElVEl' MASTER LAND USE APPLICATION DEPARTMENT OF comma rrY DEVELOPMENT SERVICES 33325 8 h Avenue South FEB 0 9 2006 PO Box 9718 Federal Way WA 98063-9718 CITY OF FEDERAL, WAY 253-835-2607; Fax 253-835-2609 BUILDING DEPT, www cityoff'ederalway.com Z APPLICATION NO(S) Date Project Name Kkt V\, Property Address/Location o� ZQL4 VJ 00+1- P . ParcelNumber(s) or Project Description C'0�V)5%Y U�-�(6� �� °` S i PLEASE PRINT Type of Permit Required Annexation Binding Site Plan Boundary Line Adjustment Comp PI zone Land Surface Modification Lot Line Elimination _ Preapplication Conference L_ Process I (Director=s Approval) Process II (Site Plan Review) Process III (Project Approval) Process IV (Hearing Examiner's Decision) Process V (Quasi -Judicial Rezone) Process VI _ SEPA w/Project SEPA Only Shoreline: Variance/Conditional Use Short Subdivision Subdivision Variance: Commercial/Residential Required Information 915 1 S. O Zoning Designation 5; F M D Comprehensive Plan Designation *1S011)00 Value of Existing Improvements �2-3G1060 Value of Proposed Improvements International Building Code (IBC): Gr00Q R ,, T M S-8 Occupancy Type -- Construction Type Applicant Name: r . Nt �L,�.'L i M u.'r �-; V" Address: 7,90o S W 3oo*k- P1 . City/State: r C'k—� W-n ' VJA Zip: a 8M3 Phone: a S3 - cH Fax: Email: Signatur A&R7 Agent (if differe)it than Applicant) Name: E5M c ov,Svlii � 6,5,1 AtY5 , Li -C. Address: 33915' 56 )44- s °;4-e City/State: Peaw-� w i � ; `"J Zip: 99663 Phone: Zs'3-83$'6j13 Fax: 7,5-3 -838-7104 Email: r Y j c- , \"ri e Q, eski c-1 V Signature : ��p Owner Name: Vr_ Address: z8 oa 5 W Citylstate: i=� rr.►)1 W Qy vo A Zip: 0119003 Phone: Z-S3 - 943 - S -3� Fax: Email: Signature: Bulletin #003 —August 18, 2004 Page 1 of 1 k:\Handouts\Master Land Use Application RECEIVED DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES FEB 0 9 2006 33325 8ffi Avenue South PO Box 9718 CITY OF CffY OF FEDERAL WAY Federal Way WA 98063-9718 BUILDING DEPT, 253-835-2607; Fax 253-835-2609 FederalWayysx.citvpfi'ederaikvay.goM ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST The State Environmental Policy Act (SEPA), RCW Chapter 43.21C, 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 EIS. Answer the questions briefly, with the most precise information known, or give the best description you can. You must answer each question accurately and carefully, to the best of your knowledge. In most cases, you should be able to answer the questions from your own observations or project plans without the need to hire experts. If you really do not know the answer, or if a question does not apply to your proposal, write "do not know" or "does not apply." Complete answers to the questions now may avoid unnecessary delays later. Some questions ask about governmental regulations, such as zoning, shoreline, and landmark designations. Answer these questions if you can. If you have problems, the governmental agencies can assist you. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. 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. k:�Ilandouts�Environmental Checklist Bulletin #050 —August 19, 2004 Page 1 of 16 A. BACKGROUND. 1. Name of proposed project, if applicable: Martin Residence 2. Name of Applicant: Michael and Pamela Martin 3. Address and phone number of applicant and contact person: Owner/Applicant: 2800 SW 30&' Pl. Federal Way, WA 98003 (253) 943 5234 Attn: Dr. Michael Martin Agent: ESM Consulting Engineers, LLC• 339151t Way South, Suite #200 Federal Way, WA 98003 (253) 838-6113 Contact. • Mr. Eric LaSne 4. Date checklist prepared: January 6, 2006 5. Agency requesting checklist: The City of Federal Way Department of Community Development Services 6. Proposed project timing or schedule (include phasing, if applicable): Upon application being deemed complete: Checklist Review. • 1 month Permitting. 1 month Home construction is expected to begin in April 2006 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. Not at this time. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. ■ Geology and Geotechnical Engineering Investigation by Engineering Geological Services & Liu and Associates, Inc, 0410212002 • Updated Geotechnical Engineering Report by Pacific Geo Engineering, LLC, 1011012005 ■ Revised Updated Geotechnical Engineering Report by Pacific Geo Engineering, LLC. 1/27/2006 (A# reports have previously been submitted to the City of Federal Way.) 9. Do you know of pending applications for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. None are known. 10. List any government approvals or permits that will be needed for your proposals, if known. - SEPA Review - Clearing and Grading Permit - Building Permits 11. Give a complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in the checklist which ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. This project is proposing to develop a 2,435 sf single family residence on a 27,000 sf parcel. The site is approximately .62 acres and is zoned RS-15. 12. Location of the proposal. Please give sufficient information for a person to understand the precise location of your project, including street address, if any. If a proposal would occur over a range of area, please provide the range or boundaries of the site(s). Please provide a legal description, site plan, vicinity map and topographic map, if possible. 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 the checklist. (Indicate if maps or plans have been submitted as part of a permit application). The proposed single family residence is located at 2804 SW 3001h P1. in the City of Federal Way in the Lakota Beach area adjacent to Poverty Bay Park. The project is more specifically located at the end of SW 30& Place. The project is within a portion of the Southwest % of Section 01, Township 21, Range 3 East, of the Willamette Meridian. TO BE COMPLETED BY LPPLICANT EVALUATION FOR AGENCY USE ONLY B. ENVIRONMENTAL ELEMENTS. 1. Earth. a. General description of the site (underline one): Flat, rolling, hilly, steep slopes, mountainous, other b. What is the steepest slope on the site (approximate percent of slope): The steepest slope on the property is approximately 35 percent and is located in the northwest corner of the site. c. What general types of soil are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, please specify and note any prime farmland. The soils onsite consist of colluvial clayey soil containing blue clay with thin lenses of silt and fine sand. Please refer to the geotechnical report for more specific information. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. We are not aware of surface indications of unstable soils on, or in the immediate vicinity of the proposed site location. The Martins existing house that is adjacent to the proposed development site was constructed over 20 year ago and does not show any evidence of the structure being disturbed by slope movement or groundwater seepage since construction. e. Describe the purposes, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Grading will be limited to the construction of the proposed driveway, water, sewer, other utilities, and the proposed stonnwater system. There will be approximately 17 cubic yards of fill, and 925 cubic yard of cut within this project, An attempt will be made to balance the site. If export is necessary the contractor will coordinate with the city to export to a city approved site. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Erosion could occur during clearing and grading operations associated with this project. To minimize the impacts of the project, appropriate erosion control measures will be reviewed and approved by the City prior to construction activity associated with this project. Furthermore, construction will occur during the summer months to reduce the potential of erosion. TO BE COMPLETED BY APPLICANT EVALUATION FOR AGENCY USE ONLY g. About what percent of the site will be covered with impervious surfaces after construction (for example, asphalt or buildings)? The site plan shows approximately 3,352 square feet of new driveway, 274 square feet of Walks and patio and 2,973 square feet of new roof associated this project: Therefore, a total of 5,599 square feet of new impervious surface, or 24 percent of the site is proposed. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: During construction, various measures are expected to be used to control erosion. These methods include construction during the dry season, the use of silt fences and hay bails, and revegetation of disturbed areas. Specific temporary erosion and sediment control measures will be reviewed and approved by the County prior to construction. 2. AIR. a. What types of emissions to the air would result from the proposal (i.e. dust, automobile, odors, industrial wood smoke) during construction, and when the project is completed? If any, generally describe and give approximate quantities if known. During construction, short-term emissions may occur, including dust and vehicle emissions from construction related equipment. After construction, emissions from this project would primarily result from automobile usage as is typical with residential development. b. Are there any off -site sources of emissions or odor which may affect your proposal? If so, generally describe. None to our knowledge. c. What are the proposed measures to reduce or control emissions or other impacts, if any: Dust emissions will be controlled during site construction by the use of best management practices, including periodic watering of disturbed areas. The project w111 not rely upon wood burning Freplaces as the primary source of heat for the new homes. All new homes will use natural gas and/or electricity to provide heat, reducing emissions caused by wood burning fires. 3. WATER. TO BE COMPLETED BY tLPPLICANT EVALUATION FOR AGENCY USE ONLY a. Surface: 1) Is there any surface water on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, associated wetland)? If yes, describe type, provide names, and, if known, state what stream or river it flows into. The Puget Sound is to the north of the site but the entire parcel is over 200 feet from the high water mark. 2) Will the project require any work over or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. The projects storm drainage outfall will go into the Puget Sound via connection and improvement to the existing storm drainage system on the parcel to the north of this project. 3) Estimate the amount of fill and dredge material that would be placed in or removed from the surface water or wetlands and indicate the area of the site that would be affected. Indicate source of fill materials. Not applicable. 4) Will surface water withdrawals or diversions be required by the proposal? Give general description, purpose, and approximate quantities, if known. No. 5) Does the proposal lie within a 100-year floodplain? Note location on the site plan, if any. No. 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. TO BE COMPLETED BY aPPLICANT EVALUATION FOR AGENCY USE ONLY b. Ground: 1) Will ground water be withdrawn or recharged? Give general description, purpose, and approximate quantities, if known. No. 2) Describe waste water material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. None. c. Water Runoff (including storm water): 1) Describe the source of runoff and storm water and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will the water flow into other waters? If so, please describe. The proposed project will provide approximately 6,599 sf of new impervious surfaces which will generate new stormwater runoff. The increased runoff from these surfaces will be collected via catch basins and routed in underground pipes The pipes will connect with an upgraded storm water system for the parcel to the north, also owned by the Martins, and be disposed of into the Puget Sound, (Please see proposed Drainage Plan prepared by ESM). 2) Could waste materials enter ground or surface waters? If so, generally describe. Waste materials are generally limited to petroleum products from the road surfaces. The water quality portion of the storm water facilities is specifically designed to prohibit these materials from entering the downstream system. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: All development and engineering requirements imposed by the City to control the impacts to the hydrology of the area will be performed by the proponent. TO BE COMPLETED BY "PPLICANT EVALUATION FOR AGENCY USE ONLY 4. PLANTS. a. Check or circle types of vegetation found on the site: XX deciduous tree: alder, maple, aspen, other cottonwood XX evergreen tree: fir, cedar, pine, other: XX shrubs: XX grass pasture crop or grain wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other water plants: water lily, eelgrass, milfoil, other other types of vegetation b. What kind and amount of vegetation will be removed or altered? The minimum amount of the existing vegetation will be removed for the grading and construction of the project The project will attempt to retain as many trees as reasonably possible in areas near the perimeter of the site. This project will meet the appropriate City requirements with respect to tree retention and/or mitigation. c. List any threatened or endangered species known to be on near the site. None, to our knowledge. d. List proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: The proposed landscaping on site w111 include typical residential landscape and incorporate trees into their final design. Existing trees located outside the building foot print and a safe distance from the proposed house will be retained if appropriate. The exact number of trees retained is unknown at this time. 5. ANIMALS. a. Circle (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, other: Mammals: deer, bear, elk, beaver, other: rodents Fish: bass, salmon, trout, shellfish, other: TO BE COMPLETED BY &PPLICANT EVALUATION FOR AGENCY USE ONLY b. List any threatened or endangered species known to be on or near the site. None, to our knowledge. c. Is the site part of a migration route? If so, explain. Not to our knowledge. d. Proposed measures to preserve or enhance wildlife, if any: None are proposed at this time. 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 needs? Describe whether it will be used for heating, manufacturing, etc. Electricity and/or natural gas will be used to meet the projects energy needs for light and heat. b. Would your project affect the potential use of solar energy by adjacent properties? If so, describe. No. c. What kinds of energy conservation features are included in the plans of this proposal? Construction of the new home will meet or exceed the necessary energy requirements of the Northwest Energy Code and those adopted by the City. 7. ENVIRONMENTAL HEALTH. a. Are there any environmental health hazards, exposure to toxic chemicals, including risk of fire and explosion, spill, or hazardous waste, that occur as a result of this proposal? If so, describe. No. 1. Describe Special Emergency services that might be required. Not applicable. TO BE COMPLETED BY %PPLICANT EVALUATION FOR AGENCY USE ONLY 2. What are the proposed measures to reduce or control environmental health hazards, if any: None are proposed at this time. b. Noise. 1. What type of noise exists in the area which may affect your project (for example: traffic, equipment, operation, other)? None, to our knowledge. 2. What types of 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 noises will likely occur on a short-term basis due to the use of heavy equipment, nailing guns and saws. This noise would be limited to typical construction hours and the City's noise ordinance. On a long-term basis, noise would be limited to typical residential uses, including cars and children. 3. What are the proposed measures to reduce or control noise impacts, if any: Increased noise levels due to construction will be restricted to the abovementioned hours to reduce any impacts to the neighboring residents. 8. LAND AND SHORELINE USE. a. What is the current use of the site and adjacent properties? The site is currently used as vacant residential praperly. The uses of adjacent properties include existing low density residential, and City park land. b. Has the site been used for agricultural purposes? If so, describe. Not to our knowledge. c. Describe any structures on the site. There are no structures on the site. d. Will any structures be demolished? If so, what? TO BE COMPLETED BY .APPLICANT EVALUATION FOR AGENCY USE ONLY No. e. What is the current zoning of the site? The current zoning is single family medium density, R5 15.0 (minimum lot size 15,000 st). f. What is the current comprehensive plan designation of the site? The current comprehensive plan designation single family medium density, R515.0. g. If applicable, what is the current shoreline master program environment designation of the site? Not applicable. h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. Yes, the City of Federal Way have classified the site as a landslide and erosion hazard area according to the City's sensitive areas map. i. Approximately how many people would reside or work in the completed project? One person will reside in the finished project. j. Approximately how many people would the completed project displace? None. k. Proposed measures to avoid or reduce displacement impacts, if any? None are proposed at this time. 1. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any? The proposed single family residence is consistent with recent development in the area, current zoning, and comprehensive plan designations and will be compliant with the City Code. TO BE COMPLETED BY r,PPLICANT EVALUATION FOR AGENCY USE ONLY 9. HOUSING. a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. The project will provide one new single-family residence in the high income level. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. There are no units to be eliminated. c. What are the proposed measures to reduce or control housing impacts, if any: None are proposed at this time. 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? The 01y`s zoning code restricts the building heights of single-family residential structures to .35: Exterior materials will typically consist of wood siding with brick, rock, or shingle accents: Specific materials will be determined by the home builder at the time of building permit and will comply with applicable City regulations. b. What views in the immediate vicinity would be altered or obstructed? None known. c. What are the proposed measures to reduce or control aesthetic impacts, if any? None are proposed at this time. 11. LIGHT AND GLARE. a. What type of light or glare will the proposal produce? What time of day would it mainly occur? Light would occur during evening and night time hours and would be limited to typical residential house lights. TO BE COMPLETED BY -PPLICANT EVALUATION FOR AGENCY USE ONLY b. Could light or glare from the finished project be a safety hazard or interfere with views? M", c. What existing off -site sources of light or glare may affect your proj ect? None. d. What are the proposed measures to reduce or control light and glare impacts, if any: None are proposed at this time. 13. RECREATION. a. What designated and informal recreational opportunities are in the immediate vicinity? The most immediate recreational opportunity is Poverty Bay Park which is adjacent to the site and offers trails and beach access.. Lakota Park is located 1.5 miles away and contains baseball and soccer fields. b. Would the proposed project displace any existing recreational uses? If so, describe. No. c. What are the proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: None are proposed at this time. 13. HISTORIC 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. Not to our knowledge. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on the site. TO BE COMPLETED BY _.PPLICANT EVALUATION FOR AGENCY USE ONLY There are none, to our knowledge. c. What are the proposed measures to reduce or control impacts, if any: None are proposed at this time. 14. TRANSPORTATION. a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any: The proposed home MY be accessed from SW 30dr PI (Please see site plan and vicinity map for proposed access point). b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? The nearest public bus access is on SW Dash Point Rd. and SW 31yh St. (bus route 901). This bus stop is approximately 1 mile southeast of the proposed site. c. How many parking spaces would the completed project have? How many would the project eliminate? The completed project would have approximately 9 parking spaces. No parking spaces will be eliminated by this project. d. Will the proposal require any new roads or street, or improvements to any existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). There will be no new roads or streets created with this project. This project will also not need to make any improvements to existing roads or streets. e. Will the project use or occur in the immediate vicinity of water, rail, or air transportation? If so, generally describe. No. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. TO BE COMPLETED BY APPLICANT EVALUATION FOR AGENCY USE ONLY According to the Institute of Traffic Engineers Manual, e Edition, there will be an average of 10 vehicular trips per day, per household. Peak volumes would most likely occur during typical rush hour times of 7.•00 — 9. 00 AM and 4.•00 — 6; 00 PM and would add approximately 1 peak hour trip. g. What are proposed measures to reduce or control transportation impacts, if any: None are proposed at this time. 16. PUBLIC SERVICES. a. Would the project result in an increase need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. Minimal. There would be a minimal increased need for fire and police protection due to one additional home in the area. The house will also have a Are prevention sprinkler system installed. b. What are proposed measures to reduce or control direct impacts on public services, if any: Property taxes, building permits and school impact mitigation fees generated from this residence are expected to mitigate impacts incurred from this development 17. UTILITIES. a. Circle (underline) utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other: cable television. b. Describe the utilities which 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. Electricity: Puget Sound Energy Gas: Puget Sound Energy Water: Tacoma Public Utility Refuse: Waste Management Telephone: Qwest Communications Sewer: Lakehaven Utility District Cable: Comcast TO BE COMPLETED BY 1PLICANT EVALUATION FOR AGENCY USE ONLY Connecoon(s) to the above mentioned utilities will be negotiated with the individual purveyor during the building permit and construction phases of this project. There may also be a need for a right-of-way permits) to gain access to the property at construction. C. SIGNATURE. The above answers are true to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. 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County makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such http://www5.metrokc.gov/servleticom.esri. esrimap.Esrimap?ServiceName=overview&Clien... 2/6/2006 PGeGe—oatecch'n—ic'a,E—ngineee—riong,!onn— January Dr. and Mrs. Michael Martin FEB 0 9 200F 2800 - 300th Place SW CITY OF FEDERAL WAY Federal Way, WA 98003 BUILDING DEPT. Re: Revised updating of the "Geology and Geotechnical Engineering Investigation, Martin Residence Report, Prepared by Engineering Geological Services and Liu & Associates, Inc., dated April 2, 2002". PGE Protect No. 0509100-R Ref: (1) Review letter by The City of Federal Way, Permit #05-105820-00-SF; Martin, Public Woks Department Review, dated December 13, 2005. (2) Application Review letter by The City of Federal Way, Permit #05-105820-00- SF; Land Use Review Martin, Parcel # 012103-9130, dated December 22, 2005. (3) Comment letter of ESM on "The review letters of The City of Federal Way, dated December 13 and 22, 2005", dated January 09, 2006. (4) Review letter by The City of Federal Way, File #06-100070-00-AD; Request for Pre -application Meeting Waiver Martin, Parcel #012103-9130, dated January 10, 2006. (5) Updating letter for the "Geology and Geotechnical Engineering Investigation, Martin Residence Report, prepared by Engineering Geological Services and Liu & Associates, Inc., dated April 2, 2002", prepared by PGE, Proj. No. 0509100, dated October 10, 2005. (6) "Geology and Geotechnical Engineering Investigation, Martin Residence Report", prepared by Engineering Geological Services and Liu & Associates, Inc., dated April 2, 2002. (7) "Grading and TESC Plan for Martin Property", prepared by ESM, dated 10/31/05, Job No.1210-001-005, Dwg. No. PL-01, Sheet 3 of 3. (8) "Building Sections for Miller Residence", Sheet 6A, 6B, & 7, prepared by ESM, no date posted. Dear Dr. and Mrs. Martin: As required by the City of Federal Way in the above -referenced review letters (item 1, 2, & 4) and explained by ESM in the comment letter (item 3), PGE has made the necessary revisions on the PGE's previous updating letter (item 5). The updating was performed for the above -referenced geotechnical report prepared earlier by some other geotechnical consultant for the proposed residence (item 6) to be located at 2800 — 300th Place SW in Federal Way. The purpose of the updating was to verify that the geotechnical recommendations provided in the geotechnical report (item 6) are still applicable to the present conditions of the site and for the above -referenced plans (item 7 and 8) of the residence. 831 1771h PI. SW - Lynnwood, WA 98037 a (Tel) 425-918-1428 * (Fax) 425-918-1401 Pacitu, Geo Err. irieerin LLC Gentechnical Fn ineerin ConsuliaElon & In [lion Proposed Martin Residence 2800 - 300th Place SW Project No. 0509100-R January 27, 2006 Page 2 of 3 As a part of updating, the referenced report and the plans were reviewed, and a site visit was made on October 4th, 2005. Based on our review of the report and the site plans the site within its proposed developed area is not considered as `geologically hazardous areas' as per the FWCC Section 22-1, "Definitions". In the process of reviewing the report, the engineering recommendations and the design information provided in the referenced report were checked and re-evaluated considering the subsurface conditions described in the referenced report and the information provided in the referenced plans. During the site visit, the present surficial conditions of the site were also observed to verify that such conditions described in the referenced report has not been altered. Based on our site visit and our understanding of client's response on the surficial conditions of the site we conclude that the subject site has not been altered from its original conditions described in the referenced report. Based on our site visit, and review of the referenced report and the plans we conclude that the proposed residence could be built at the site. Also, the referenced report fulfills the requirements of FWCC Section 22-1286 © (1-4), "Limitations", therefore, the proposed residence could be built if the recommendations and limitations provided in the referenced report is strictly followed during the design and construction phases of the residence. We make no other warranty, either expressed or implied. It should be understood by the client that contents of the above -referenced report would remain applicable for the design and construction of the proposed residence. Also, the client must retain a professional geotechnical engineer during the site development and the construction phase of the residence to monitor and inspect that the recommendations provided in the above -referenced report are understood properly and implemented appropriately by the contractor. The conclusions presented in this letter are solely relied on the subsurface information provided in the above -referenced report and the information provided in the above -referenced plans. If any of the design information considered during our evaluation is not correct or if there are any revisions to the plans for this residence or if variations in the subsurface conditions considered during this evaluation are encountered later on during construction, PGE should be notified immediately of these revisions and variations so that necessary amendment of the geotechnical recommendations provided in the above -referenced report can be made. If such changes or variations are not notified to PGE, no responsibility should be implied on PGE for the impact of those changes or variations on the project. If there is a substantial lapse of time between the submission of this letter and the start of the proposed construction work, or if the present conditions of the site changes during the lapsed time due to natural causes or construction activity at or adjacent to the site, it is recommended that the Paciho- Geo Ent7ineering, LLc Gentechnical En lneedn ConsulFalTan &Ins etFian Proposed Martin Residence 2800 - 300th Place SW Project No. 0509100-R January 27, 2006 Page 3 of 3 above -referenced report be reviewed to determine that the conclusions and recommendations of that report remain applicable to the changed conditions. This report is the property of Pacific Geo Engineering, and has been prepared for the exclusive use of Dr. and Mrs. Martin, and their authorized representatives for the specific application to the proposed residence at the subject site in Federal Way, Washington. We trust the information presented in this letter is sufficient for your current needs. We appreciate the opportunity to provide the geotechnical services for the proposed residence. Should you have any questions or concerns, which have not been addressed, or if we may be of additional assistance, please do not hesitate to call us at 425-918-1428 or 425-218-9316. Respectfully submitted, Pacific Geo Engineering, LLC , Sa m KOW� . AS Santanu Mowar, MSCE, P.E. ,.. Principally is �I 37r>be�" D:\Geotechnical\2005-proj\0509100-Rrevised let S ��= O 8��.. ,a.a Pacific Gea EngineenngL LC Geotechnical Engineering, Consulting & Inspection October 10, 2005 Dr. and Mrs. Michael Martin 2800 - 300th Place SW Federal Way, WA 98003 Attn.: Dr. and Mrs. Martin RECEIVED NOV 1 0 2005 CITY OF FEDERAL WAV BUILDING DIEPT. OCT 2 205' Re: Updating the "Geology and Geotechnical Engineering Investigation, Martin Residence" Report, Prepared by Engineering Geological Services and Liu & Associates, Inc., dated April 2, 2002. PGE Project No. 0509100 Ref: "Geology and Geotechnical Engineering Investigation, Martin Residence" Report, Prepared by Engineering Geological Services and Liu & Associates, Inc., dated April 2, 2002. "Conceptual Site Plan for Martin Property", prepared by ESM, dated 08/08/05, Job No.1210-001-005, Dwg. No. PL-01. "Architectural Plans for Miller Residence, Sheet 1, 6A, 6B, & 7", prepared by John Ross, dated 11/21/2004. Dear Dr. and Mrs. Martin: As requested, PGE has completed the updating of the above referenced geotechnical report prepared earlier by some other geotechnical consultant for the proposed residence to be located at 2800 — 300th Place SW in Federal Way, Washington. The purpose of this updating was to verify that the geotechnical recommendations provided in the above -referenced report are still applicable to the present conditions of the site and for the above -referenced plans of the C Z b y b residence. C As a part of updating, the referenced report and the plans were reviewed, and a site visit y :� was made on October 4th, 2005. In the process of reviewing the report, the engineering recommendations and the design information provided in the referenced report were Z checked and re-evaluated considering the subsurface conditions described in the referenced c report and the information provided in the referenced plans. During the site visit, the present Ul z surficial conditions of the site were also observed to verify that such conditions described Z 70 in the referenced report has not been altered. a 831 177th PL SW. Lynnwood. WA. 98037 (Tel) 425-918-1428. (Fax) 425-918-1401 Pacific Geo Enrrineerira r LtC Geotechnical Enalneerina, Consultat/on & Inspection Proposed Martin Residence 2800 - 300th Place SW Project No. 0509100 October 10, 2005 Page 2 of 3 Based on our site visit and our understanding of client's response on the surficial conditions of the site we conclude that the subject site has not been altered from its original conditions described in the referenced report. Based on our review of the referenced report and the plans we conclude that the contents of the referenced report would remain applicable for the design and construction of the proposed residence. We make no other warranty, either expressed or implied. The conclusions presented in this letter are solely relied on the subsurface information provided in the above -referenced report and the information provided in the above -referenced plans. It should be noted that PGE cannot take the responsibility regarding the accuracy of such information provided and/or prepared by the other consultants. If any of the design information considered during our evaluation is not correct or if there are any revisions to the plans for this residence or if variations in the subsurface conditions considered during this evaluation are encountered later on during construction, PGE should be notified immediately of these revisions and variations so that necessary amendment of the geotechnical recommendations provided in the above -referenced report can be made. If such changes or variations are not notified to PGE, no responsibility should be implied on PGE for the impact of those changes or variations on the project. If there is a substantial lapse of time between the submission of this letter and the start of the proposed construction work, or if the present conditions of the site changes during the lapsed time due to natural causes or construction activity at or adjacent to the site, it is recommended that the above -referenced report be reviewed to determine that the conclusions and recommendations of that report remain applicable to the changed conditions. This report is the property of Pacific Geo Engineering, and has been prepared for the exclusive use of Dr. and Mrs. Martin, and their authorized representatives for the specific application to the proposed residence at the subject site in Federal Way, Washington. Pacific Geo Engineeringy LLG Geoterhnical Enalneerina, Consultation & lns ection Proposed Martin Residence 2800 - 300th Place SW Project No. 0509100 October 10, 2005 Page 3 of 3 We trust the information presented in this letter is sufficient for your current needs. We appreciate the opportunity to provide the geotechnical services for the proposed residence. Should you have any questions or concerns, which have not been addressed, or if we may be of additional assistance, please do not hesitate to call us at 425-918-1428 or 425-218-9316. Respectfully submitted, Pacific Geo Engineering, LLC Santanu Mowar, MSCE, P.E. Principal D:\Geotechn ical\2005-proj\05091001 et t DECEIVED FEB 0 9 2006 CITY OF FEDERAL WAY ` BUILDING DEPT. GEOLOGY AND GEOTECHNICAL ENGINEERING INVESTIGATION, MARTIN RESIDENCE FEDERAL WAY, WASHINGTON for Dr. and Mrs. Michael Martin 2800 300th Place SW Federal Way, WA. 98003 by Engineering Geological Services 4538 Lake Washington Blvd. Kirkland, WA. 98033 and Liu & Associates, Inc. 19213 Kenlake Place NE Kenmore, WA. 98028 April 2, 2002 TABLE OF CONTENTS I. introduction.. ............................................................................ .... 1 A. General..................................................................... B. Site Access .......................... :. 2 ............... C. Proposed Project ................ 2 D. Scope of Services........................................................ 3 II. Site Description and Investigation ................................................ 3 A. Surface............................................................................ 4 B. Subsurface...........�.........is. ...._................................. ........... SL C. Groundwater .........................._...............---.............. .. 5 D. Seismicity ..................... .............. ..... _ E. Slope Stability... F. Environmentally Sensitive Areas Requirements .................. 9 III. Conclusions and Recommendations ............................................. 10 A. General... ... ..................... 10 B. Earthwork..........................._......_............_................ 10 C. Drainage .......................... 12 14 D. Construction During Wet Weather Conditions .............. E. Guide Specifications ........................................................ 14 F. Retaining Walls ........................ ............................. 14 G. Slab -on -Grade 15 H. Conventional Foundations .................. ......... ......... 1........... 15 I. Pile Foundations ................... 15 J. Access Driveway ........................• 17 IV. Construction Observation ...................... ...................... 18 V. Report Preparation.-.............................. .............---................. 18 FIGURES Figure 1 Vicinity Map Figure2.................. ............. ........... Site Plan Figure 3 .... ..................... .......... .... Profiles Across Proposed Structures Figure 4........................................... Typical Footing Drain Detail Figure 5........................................... Typical Slab -on -Grade' Detail TABLES Table 1. ............ . ....... _ ; _ Re"suits of Slope Stability Analyses Table 2.............................................. Site Soil Parameters Table 3.............................................. WSDOT Standard Specifications Table 4..........................:................... Retaining Wall Soil Parameters Table 5 ......... Pile Parameters APPENDICES AppendixA . ........................................................ AppendixB......................................................... AppendixC........................................................ Boring Logs and Laboratory Data Slope Stability Data Sheets ARC Rockery Guidelines �� WO� Martin Residence, R2126b, 3-25„ 1 Geology and Geotechnical Engineering Investigation, Martin Residence, Federal Way, Washington L INTRODUCTION A. General This report presents the results of our geological and geotechnical investigation for the Dr. Michael Martin Residence located at 2800 SW 300th Place, Federal Way, Figure 1, Vicinity Map. The proposed development consists of the location of a detached garage and single-family residence. This project is located adjacent to the Poverty Bay Park, currently undeveloped regional park. The property consists of 2.85 acres in two parcels. Parcel A is undeveloped and is the subject of this geotechnical investigation. Parcel B has a single-family residence on the site which is accessed by a paved driveway from SW 300th Place. The purpose of this work is to evaluate the site for slope stability, foundation bearing characteristics, and ease of development. To attain these goals two borings were drilled and sampled on the east side of the property. Most of the proposed development will be held to the eastern 100 feet of parcel A. There will also be a SEPA check list prepared for this development although that check list may not be required at this stage of development. The residential site is reported to be located in a conservancy environment based on the shoreline areas of high scenic value (Sec. 18-167. b.4) Federal Way City Code. The conservancy environment allows for development of sites if they follow certain requirements: i.e. The minimum lot size must be 35,000 square feet, all lots to be served by public water, all lots are to be served by an approved sewage disposal system, all lots to be served by paved streets, and all lots to have a minimum width of 100 feet. This proposed development will fulfill all of these criteria. In addition, the proposed structures will be located a minimum of 350 feet from the present shoreline. Engineering Geological Services, 4538 Lake Washington Blvd., Kirkland, Wa. 98033, 425 928 3162 Martin Residence, R2126b, 3-2., This site is also within an area that has been defined as environmentally sensitive. The primary reason for this classification are the steep slopes. A subsequent section of this report will2ddres _ each of environmental parameters with in this classification. The following x components must be evaluated: whether the subject property o Contains or is within 25 feet of a regulated slope, o Contains or is within 100 feet of a wellhead, o Contains or is within 100 feet of the top of any bank of a major stream, o Contains or is within 50 feet of the top of any bank of a minor stream, . . , . .. _A- A_ Jr . _: o Contains or is within 25 feet of any regulated lake, and/or o Contains or is within 100 feet of the edge of any wetlands. The site contains steep slopes that are in excess of 30 percent and slopes that exceed 40 percent. These slopes are defined on Figure 2, Site Plan. None of the other criteria apply to the site. B. Site Access Access to the Martin Residence the main part of Federal Way can be attained via SW Dash Point Road to 30th Avenue SW (right turn), drive to the end of 30th Ave. and turn right on SW 300th Place. The proposed residence is located on the end of the right hand driveway located at the end of 300th Place. The property line is located at the gate at the end of the driveway. The residential property extends 272 feet north of the gate and about 500 feet to the left to the water's edge, Figure 2, Site Plan. The Parcel B is occupied by a single family residence under the same ownership as the proposed developable lot. Access to the building site will be attained by the development of a drive way extending from the gate inward 100 feet to the proposed garage. This driveway will be designed in accordance with City of Federal Way Code and is expected to be 20 feet wide with a overall gradient of 20 percent. This slope could be lowered slightly by winding the driveway up to the garage area. However, this method may remove some of the desirable trees on the site. C. Proposed Project The proposed project consists of the development of a single family residence and detached garage to be located along the eastern side of the site. The project is proposed in two stages: the first stage is the driveway access and the garage construction. The second stage is the development of the residence. The owner is interested in disturbing as few of the existing trees as possible as they are of large size and an asset to the development. ETigiiwc sig Geological Services, 4539 Lake Wwhington Blvd., Kirkland, Wa. 98033, 425 828 3162 2 Martin Residence, R2126b, 3-2— j2 Not included in this study but required for the development will be the design of a sewage disposal system. The surface soils are slightly to moderately permeable, but they will have to be tested for percolation capability. Alternatively, the sewer disposal system could be designed to pump the sewage from the two residences up the slope to the mains through a 2-inch pressure lateral. This option would eliminate the addition of additional groundwater to the site and reduce the area of disturbance within the development. These options will be examined by the Civil Engineer for the project. The proposed project will have to be founded on the deeper soils approximately 15 feet below the present grade. This sound bearing soil may be found by means of over excavation or the use of piers or piles. Winter time groundwater was encountered at a depth of seven feet in Boring B-1. Any footings will require subdrains to dewater the foundation areas. Scope of Services - -- �- The scope of work for this geotechnical investigation included site visits, drilling, soil sampling, topographic mapping, and testing of the soil samples obtained from the two borings drilled on site. The engineering analysis for the settlement and pile embedment, lateral load parameters for the retaining wall, and preparation of this report completed this scope of work. This report has been prepared in accordance with generally accepted geotechnical engineering practices, and in accordance with the agreement with Dr. Michael Martin and his design staff, and for specific application to the development of the residences. I in ownership, the nature, design, or location of the proposed residential structures, or if any future additions are planned, the conclusions and recommendations contained in this report shall not be considered valid unless 1) project changes are reviewed by Engineering Geological Services or Liu & Associates, Inc. and 2) the conclusions and recommendations presented in this report are modified or verified as required in writing. Reliance on this report by others must be at their risk unless we are consulted in the use or limitations of this information. We cannot be responsible for the impact of any changes in environmental standards without further consultation. We can neither vouch for the accuracy of information supplied by others nor accept consequences for unconsulted use of segregated portions of this report. H. Site Description and Investigation The site surface conditions and access have been described in general in the preceding section. The present site development,consists of a single family, A -Frame structure on Parcel B, Figure 2, Site Plan. This structure has been constructed on a conventional, continuous, spread footing. There is no evidence that this structure has been disturbed by slope movement or affected by groundwater seepage since construction. The structure has been in place for approximately 20 years. Our subsurface exploration encountered a soil profile consisting of 5 to 15 feet of colluvial clayey soil, variably thick sections of very stiff, highly plastic, blue clay with thin lenses of silt and Enginuxing Geological Services, 4538 Lake Washington Blvd., Kirkland, Wa 98033, 425 828 3162 3 Martin Residence, R2126b, 3-2- fine sand, layers of sand varying from 3 to 9 feet thick with silt and clay up to 45 percent by weight. The soils are generally layered below a depth of about 12 _ feet. The layers appear to be subhorizontal or with a slight dip to the west. Firm bearing soils of stiff to very stiff clay or dense to very dense sand were found generally below 10 to 15 feet below present grade, Figure 3, Profiles Across Structure Site. Blow counts (SPT) exceed 20 BPF at 15 feet in B-1 and 20 feet in B-2. The allowable soil bearing capacity of the soil below 10 feet are estimated at about 1500 psf and below 15 feet at about 3000 psf. The standing groundwater level was identified in Boring B-1 at a depth of about 7 feet. The borings were not left open for a sufficiently long time for the water levels to stabilize and this depth should be considered approximate. A. Surface The present surface consists of a moderately sloping surface that dips to the southwest at a slope of about 20 degrees. The slope steepens to no more than 45 degrees along the northerly shoreline. All of the site above elevation 60 is gently sloping and below an average gradient of 30 percent. The 30 percent line climbs to above 80 feet elevation along the south side of the property. The environmentally critical areas will be addressed in a later section. The property is heavily vegetated with blackberries, sahal, rhododendrons, and trees. The trees consist of Cedar, Maple, Fir, and Cottonwood. The trees are massive in size and every effort will be made to protect as many as possible during the development. The site is traversed only on the northwest comer of the site by a shallow ravine that dies out at the top of the shoreline bluff. This ravine is likely to carry water only during the wettest days of the year and nearly all of the water infiltrates before the top of the bluff is attained- There is no evidence of any other possible water courses on the property. B. Subsurface The subsurface conditions have been evaluated by a traverse of the site and the boring of two auger borings to depths of 41.5 and 31.5 feet. The borings are located along the eastern part of the site where the proposed structures will be located. Additional information was obtained from the Geologic Map of the Poverty Bay Quadrangle, USGS, GQ-158. The USGS map indicates that this site is mantled with'Quaternary-age Salmon Springs Formation, Qss. This formation is underlain by a glacio-lacustrine sand and clay and overlain by recessional outwash glacial drift. The Salmon Springs Formation is composed of coarse sand and gravel with thin layers of clay and silt. The formation is in excess of 100 feet thick, but the formation has been eroded to- a wedge shaped outcrop on the site. The borings encountered a succession of clay and sand, interlayered, and below the loose to medium stiff colluvium, is very stiff and very dense. The clay layers are very stiff to hard and appear to be unweathered and unfractured. Scattered gravel up to 2 inches in nominal diameter was found in the sandy deposits. The soil samples obtained consist of about 53 percent sand and Enginizriog Geological services, 4538 Lake Washington Blvd., Kirkland, Wa. 98033, 425 828 3162 4 Martin Residence, R2126b, 3-2- 2 43 percent silt and clay. Much of the soil profile is reddish in color indicating oxidation of the formation to depths of 40 feet or more. The Salmon Springs Formation is a prolific aquifer in parts of the Tacoma area and this site does display these characteristics with a perched waterlevel at a depth of 7 feet. The separate layers of lacustrine clay tend to separate the potentially water bearing layers of sand within the Salmon Springs Formation. The site reconnaissance did not reveal any slide masses or scars. It is our opinion that the steep shoreline slopes have sloughed most of the disturbed soils and the remnants have been washed away by wave action. The upper slopes do not show any evidence of slope disturbance or movement. C. Groundwater .1 . The borings were not left open for a sufficiently long time to determine the standing groundwater level. Boring, B-1, was held open for a few hours and the water level was measured at a depth of 7 feet below the original grade. Seepage appeared to enter the holes at several horizons that probably contained sand layers. As stated above, the Salmon Springs Formation is a good source of groundwater in most areas of Federal Way and southern King County. The site has year around seepage from the slopes above the existing residence. This water is 1;.j collected by drains and conducted to the shoreline. Seepage is also found along the shoreline from the upslope area. The surface seepage zones located within the building site must be collected and discharged through the existing drainage system in order to minimize soil erosion and maintain slope stability. All foundations will require subdrains to facilitate shallow groundwater drainage. D. Seismicity Earthquake intensities vary depending upon the magnitude of the earthquake and -the distance of the project site from the epicenter or causative fault. This site could be subject to substantial seismic events if past history represents the regional pattern. Five earthquakes caused significant damage in the Olympia and Seattle area in 1949, 1965, and 2001 respectively. The 2001 Nisqually Earthquake was centered 24 miles south of the site. This earthquake was felt in this area. The 1949 and 1965 events caused regional damage and the 2001 event caused local damage throughout the area. We have no reports of damage in the immediate site area. Two other earthquakes centered in Monroe and Montesano have shaken the area, but both were of slightly lower magnitude and no damage has b repo ed in this area. Site conditions are conducive for shaking, but the soils on site are conducive to 'quefaction because of their consistency. Site acceleration characteristics must in the site designs. Engineering Geological Services, 4538 Lake Washington Blvd, Kirkland; Wa. 99033, 425 828 3162 5 Martin Residence, R2126b, 3-2- 2 1. Faulting The primary tectonic feature located in the Pacific Northwest and dominating the region's seismicity is the Juan de Fuca Subduction Zone located approximately 70 kilometers below the earth's surface. The surface expression is located approximately 150 to 200 kilometers west of Seattle. This zone is expected to produce earthquakes of a magnitude of 8.0 or larger with return periods of about 300 to 500 years. This earthquake magnitude and return period has been interpreted based on features observed along the Pacific coast. To date these parameters are �f subjective and the subject of further studies. The distance to a potential hypocenter under th ee 1 is sufficiently great to reduce the peak particle acceleration on site to that anticipated by the UBG A recent geological structure has been identified as a possible buried fault with significance. The fault has been traced by numerous small seismic events from Bainbridge Island to/through Seattle, and the north end of Mercer Island.. It tends to die out at the south end of Lake Sammamish. This trend is located within 20 miles of the site. There have been no earthquakes recorded on this alignment greater than about 3.5 magnitude. Most events are less than 2.0 but the density of activity and the size of the feature infers the potential for significant ground motion (shaking) and/or movement. Surface expressions on this potential fault have not been identified. Recently published literature infers that there is considerable offset on this fault and earthquakes on it may have been the cause of submarine landslides in Lake Washington and Puget Sound. A return period of around 300 years has been estimated. Much more work needs to be done to confirm these preliminary findings. A few local faults have been mapped in the glacial sediments located in the region. These local faults are likely the result of soil consolidation from the thick ice cap that overran the site between 120,000 and 10,000 years ago. These fault are not expected to generate seismic ground motion. While the glacial till mantling the region may conceal significant faults with the potential for generating earthquakes, no definitive seismic sources have been identified and no lineaments of earthquakes of magnitude greater than 2.0 to 3.5 have been identified: Earthquakes derived from the volcanic activity of Mt. Rainier may generate events of about 5.0 magnitude that have the potential to damage structures. 2. Liquefaction Generally, soils that are susceptible to liquefaction are loose, saturated, uniformly graded, fine- grained sand that lie within 60 feet of the ground surface. The bearing soils identified on site consist of very stiff to hard clay -and very dense sand in the saturated horizon. Within the saturated horizon these hard clay and very dense sand layers are resistant to liquefaction. None of the standard penetration tests (SPT) in the sand below the water table displayed a SPT of less than 20 blows per foot. Therefore, -the risk for liquefaction to occur on the site should be minimal. Engineering Geological Services, 4539 lake Washington Blvd., Kirkland, Wa. 98033, 425 828 3162 6 Martin Residence, R2126b, 3-25 3. Seismic Design Parameters W Tlie nifo Building Co Seismic Zonation Map (1997) places the site in Seismic Zone 3. e ommends that the seismic zone factor (Z) be 0.30. The site coefficients are L con y a soil profile type Sn . Seismic coefficients Ca is 0.36, Cv is 0.54. Near -source factors are Nv 1.0 and Na is 1.0.. The seismic source type is Type B, which represents a causative fault with an earthquake magnitude of less than 6.5 M. It is our opinion that the seismic stability of this site is suitable for the development of this site. The effects of earthquake shaking will not result in liquefaction of the foundation soils. Lateral soil spreading is a potential. The slope stability analyses indicate that the present slope may be affected by a major seismic event (0.2 g horizontal) as imposed by the UBC. The slopes within 150 feet of the proposed residence and garage are believed to be stable under present conditions and at the 0.2 g acceleration anticipated from a major earthquake. The minimal work recommended involves the installation of subdrainage behind the foundation walls for the new structures. The site exhibit topography that may contribute to the amplification of shaking. The distance from larg , Mon earthquake epicenters is sufficiently distant, however, to anficipate that the use of UBC eisn-lic design requirements will be satisfactory. The shallow depth to sound bearin onliquefiable soils, and the distance from historic earthquake epicenters are positive site attributes. E. Slope Stability Slopes adjacent to the proposed structures exhibit a slope gradient of about 20 degrees or about a 36 percent gradient.: The bluff fronting the shoreline and the slope adjacent to the driveway along the south side of Parcel B exhibits a gradient of 30 to 50 percent. The steeper gradients are along the shoreline. The height of the bluff is about 60 feet and the lower slopes are from 20 to 25 feet in height. N Two slopes have been analyzed to determine the environmentally critical area determination. The Profile C-C is located on the north end of the shoreline bluff and trends in a east -west direction. The Profile D-D is located on a northeast southwest trend starting at the corner of the proposed residence. The C-C profile represents the steep slopes that may be considered unstable while the D-D profile represents the lower more stable slopes. The Factors of Safety (SF) against slope failure tend to verify these opinions. The slope analyses use the slip circle method and applied variations of the anticipated soil parameters to determine the sensitivity of the factor of safety (SF) to changing soil parameters. The method is published in Hoek and Bray, Rock Slope Engineering (1991). The analyses are based on the Bishop method using empirical parameters col}ected from over 300 slope failures. The location of the point of rotation for the slip failure is determined based on the Engineering Geological Services, 4538 Lake Washington Blvd., Kirkland, Wa- 98033, 425 828 3162 7 Martin Residence, R2126b, 3-2:, inclination of the slope and the height of the slope. A secondary method of analysis using an 100% saturated slope also was used to determine the general factor of safety of the existing slope. Most municipalities require that modified slopes must attain a factor of safety of 1.5 or greater static and 1.1 and greater for pseudostatic seismic conditions. This site has been reviewed based on these requirements. The existing slopes display SF's of 2.0 (static) or 1.0 ( pseudostatic)under saturated conditions. These values use a predominantly sand profile, no cohesion and a water level up to existing grade. If this slope is drained and the water level lowered, the SF's will be increased slightly to the required levels. The steep slope profile, C-C, is far from the proposed structures. It displays low factors of safety. In the undrained state the likely SF is 0.79 not considering cohesion. Because the slope is standing with no apparent distress, we have added cohesion in order to attain an SF of about 1.0. Significant amount of work would be requited to bring this slope to a ,1.5 ,SF. This effort is not required to minimize risk to the proposed development. As cited in the earlier text, there are no mappable slides or slope disturbances found on this site. The nearest slides have been mapped about 1/4 mile to the north of the site, on the north side of the park site. The shallow groundwater levels are conducive to slope disturbance. Therefore, dewatering is important to improving the stability of the construction affected slopes. The following table, Table 1, Slope Stability Analyses Results, provides the range of soil parameters used in this analyses and the resulting factors of safety. Table 1. Martin Residence Summary Slope Stability Analyses Results Trial Coefficient Density Cohesion Acceleration Factor of Safety of ' pcf psf g, % gravity Static Pseudostatic C-C Friction Und Degrees 1 10 120 0 0.2 0.25 0.16 2 10 120 50 0.2 0.29 0.19 3 10 120 1000 0.1 1.03 0.88 4 10 120 0 0.2 0.79 0.52 5 30 120 800 0.2 1.42 1.07 6 30 120 900 0.2 1.49 1.07 7 35 120 750 0.2 1.54 1.09 Drained 1 10 120 0 0.2 0.26 0.17 2 10 120 50 0.2 0.30 0.20 3 10 120 800 0.2 1.00 0.74 4 10 120 1000 0.1 1.19 1.02 5 30 120 100 0.2 0.94 0.62 6 35 120 100 0.2 1.12 0.74 Engineering Geological Services, 4539 Lake WaFhington Blvd., Kirkland, Wa. 98033, 425 828 3162 8 Marlin Residence, R2126b, 3-2. D-D Drained 1 10 120 0 0.2 0.75 0.33 2 10 120 650 0.2 2.07 1.11 3 10 120 550 0.2 1.86 0.99 4 30 120 0 0.2 2.12 1.08 5 25 120 0 0.2 1.74 0.88 6 25 120 200 0.2 2.15 1.12 Undrained 1 10 120 0 0.2 0.81 0.31 2 10 120 650 0.1 1.68 1.07 3 10 120 55.0 0.1 1.54 0.96 4 10 120 550 0.2 1.54 0.76 5 10 120 -800 0.2 1.88 0.97 6 10 120 0 0.2 0.80 0.31 7 30 120 0 0.2 2.08 1.02 8 30 120 50 0.2 2.15 1.06 9 35 120 50 0.2 2.54 1.28 The table indicates that the slopes immediately adjacent to the building locations, Profile D-D, reflect factors of safety that are suitable for construction. The soil parameters determined for the site are shown in Table 1 and are noted below in Table 2, Site Soil Parameters. Table 2. Site Soil Parameters Soil type Cohesion(psf) Coefficient of Friction Clay- 200 10 degrees Sand 0 30 degrees The analyses data sheets and the slope profiles are provided in Appendix B, Slope Stability Analyses Data Sheets. The theoretical slip circles represent deep seated failures on these slopes. The lower slope angles are safe and need not be considered. The steeper slope along the bluff edge is also deep seated and any development along this bluff will require building setbacks of 60 feet to 100 feet from the bluff edge. F. Environmentally Sensitive Areas Requirements This site is in an environmentally sensitive area by virtue of the presence of the steep slopes and the potential for erosion. An estimated fifty percent of the two parcels is greater than 30 percent gradient. The apparent mode of failure is by sloughing rather than rotational failure or wedge Engineering Geological Services, 4538 Lake Washington Blvd, Kirkland, Wa. 98033, 425 829 3162 9 Martin Residence, R2126b, 3-2— failure. Erosion will be extensive if the vegetation cover is disturbed. It is essential that the soils exposed during construction must be protected using straw and jute matting with early seeding of grass to minimize disturbance. Disturbance of the critical slopes with gradients of 30 percent or greater is to be held to the minimum possible. I iL C¢tieluais-n-s strid; Recotlameiidhtiorts A. General It is our opinion that the Martin residential site is suitable for development and the construction of residence and garage provided that the recommendations in this report are fully implemented in - the design and construction of the development. The presence of very stiff clay and very dense sand at a depth of 10 to 15 feet is the primary reason for this opinion. Due to the weak unstable colluvial material covering the site to 10 to .15.E feet, deep, that site grading work be limited to between April 1 and October 30 of the year. The moderate upper site slopes do not require retention but the high groundwater levels must be drained. Buildings and retaining walls may be supported on footing foundations if they are extended to the underlying very stiff clay to dense sand layers. Otherwise, buildings and retaining walls should be supported on piles penetrating into the surficial weak colluvium soil and seated into the underlying firm clay and sand layers. This report will provide soil parameters for both types of foundations. ns. When these plans are completed; they sliou be reviewed to make sure that the carthwork and foundation recommendations presented in this report are complied with. We recommend that all plans are reviewed, that a representative of our firm be on site during construction, and that all soil surfaces be verified that competent bearing soil is exposed as anticipated. We can assume no responsibility for the misrepresentation of our recommendations if we do not review the plans and specifications, and monitor the earthwork. The conclusions and recommendations presented in this report should be incorporated in the design and construction of the project to minimize any soils and/or foundation -related problems. Detailed earthwork and foundation recommendations for use in design and construction of the project are presented in the following sections. B. Earthwork 1. Clearing and Site Preparation The garage and driveway areas should be cleared of all obstructions and debris. Holes resulting from the removal of large underground obstructions such as boulders and tree stumps should be cleared and backfilled with suitable imported material. Where fill is placed, all vegetation, topsoil, and unsuitable surficial soils should be stripped and the exposed soil should be recompacted to a non -yielding state prior to fill. During grading, the colluviumsoils should be examined to determine if they too should be excavated and removed. All slopes steeper than 10 percent that are to receive fill shall be benched and a keyway installed along the toe of the slope. The vertical Engineering Geological Services, 4539 Lake Washington Blvd_, Kirkland, Wa. 98033, 425 929 3162 10 Martin Residence, R2126b, 3-2- steps of the benches should be no higher than four feet. All fill should be placed in accordance with Section B.6, Compaction. 2. Temporary Excavations Foundation excavation depths and slopes, including utility trenches, should comply with local, state, and federal safety regulations. Specifically, the current OSHA Health and Safety Standards for excavations, 29 CFR Part 1926, should be followed. We understand that these regulations are to be strictly enforced, and if they are not closely followed, the owner and the contractor could be liable for substantial penalties. The contractor's "responsible person as defined in 29 CFR Part 1926" should evaluate the soil exposed in excavations as part of the contractor's safety procedures. 3. Subgrade Preparation _ 3 s - After the completion of clearing of the areas to receive fill, the surface must be benched to provide a suitable surface for compaction. The exposed native surface should be compacted and moisture -conditioned to structural fill requirements. 4. Subgrade Preparation for Slabs We recommend that any engineered fill layer be a minimum of two feet thick under any slabs. Any existing locations on site that are presently at grade should be over -excavated to two feet below grade, scarified, and backfilled using imported structural fill. The excavated on site material which meet the requirements of Structural Fill Material (Section III. B. 5 ) should be stockpiled and later used as fill. The exposed surfaces should then be prepared in accordance with Section III. B.3: Subgrade Preparation. On site or imported soil or imported to be used as structural fill should be compacted in accordance with Section IH.B.6: Compaction. 5. Structural Fill Material Based on our investigation, it is our opinion that -the on site soils can not be recompacted and used as structural fill. The excavated soils that do not meet the requirements of structural fill should not be used or mixed with any structural fill material and should be disposed of offsite or used only for landscaping. Structural fill should be clean soils containing no organic or other deleterious substances and should not contain rocks or lumps larger than 4 inches in greatest dimension. In addition, imported soils to be used as structural fill should be predominantly granular with a plasticity index (PI) of 12 or less. Structural fill should be placed at, or slightly above the optimum moisture content if placed during the summer months. If the materials are too wet to be compacted to the required density, it will be necessary to dry the fill material, mix with lime, or replace the soil to achieve the required compaction. Structural fill will be observed and tested to the required density as described in the Engineering Geological Services, 4538 Lake Washington Blvd., Kirkland, Wa. 98033, 425 828 3162 11 Marlin Residence, R2126b, 3 2:>- Z following section. The quality of the structural fill will determine the number of compaction tests required during fill construction. 6. Compaction All structural fill and slope backfill should be compacted with a vibratory mechanical compactor to at least 95 percent of the maximum dry density determined by ASTM Designation D1557-78, Modified Proctor Method. Fill material should be spread and compacted in lifts not exceeding eight inches in uncompacted thickness. An independent soil testing firm shall be contracted to perform the field density tests. 7. Trench Backfill Utility trenches should be backfilled_with:structural fill placed in lifts of approximately 6 inches in uncompacted thickness. Thicker lifts can be used provided the method of compaction is approved by a representative from Engineering Geological Services or Liu & Associates, Inc. The backfill material shall be compacted by a mechanical compactor to at least a compaction level of 90 percent except that the top four feet of backfills under slab and pavement areas should be compacted to at least 95 percent of maximum dry density to minimize settlement of the finish grade. C. Drainage On site soils have been classified using the Unified Soils Classification System (USCS). Surficial soils are slightly plastic, soft, silty to sandy clay to a depth of from five to fifteen feet below existing grade. The moderate relief of the site and modest permeability of the colluvial topsoil results in eventual saturation of the upper soils and the potential for soil erosion and slope movement. The soils become saturated very early in the rainy season and seepage is widespread across the site. Runoff in any volume will cause severe erosion, a potential that will require the installation of silt fences to contain sediment transportation and ditches and sump pits to control runoff during construction. Installation of permanent curtain drains will be required to minimize future erosion and to enhance slope stability. You will have to have your civil engineer design the site drainage system when the site plans are developed. Storm runoff over impervious surfaces, such as roofs and driveways, should be captured using underground drainlines and catch basins. Captured water should be tightlined to drain into a storm sewer or a suitable discharge facility. Water should not be allowed to pond in any areas where foundations, slabs, or pavements are to be constructed. Water that is encountered during foundation excavation should be pumped out of the excavations. Alternatively, excavations can be sloped toward one or more shallow sump pits. The collected water should then be diverted to a positive and permanent point of discharge. Infiltrated surface water is likely to seep through the slopes to daylight on the lower adjacent Engineering Geological Services, 4538 Lake Washington Blvd., Kirkland, Wa. 98033, 425 828 3162 12 Martin Residence, R2126b, 3-2- 1 property. Care must be taken to maintain infiltration to low volumes on the slope after construction. Drainage Measures Long-term drainage measures for buildings should include (1) grading, (2) perimeter footing drains, and (3) slab moisture barriers. The design of a.stormwater detention system is not a part of this study. Each of the above are discussed below. (1) Grachng Positive surface gradients should be provided around to the buildings to direct surface water away from foundations and slabs toward suitable discharge facilities. We recommend that the ground be sloped at a minimum of three percent gradient for a distance of at least 10 feet from the structures. Similarly, roof downspouts shall be connected to an underground drain line system and tightlined to discharge to a suitable discharge facilities: Ponding of surface water shall not be allowed adjacent to structures or on pavements. We further recommend that the slope above the proposed structures be landscaped with concrete -lined swates to conduct surface runoff to catchbasins and tightlined to the bottom of the slope for discharge. (2) Perimeter Footing Drains We recommend the installation of footing drains around the perimeter of the structures. These drains should consist of a 4-inch minimum diameter, perforated or slotted, rigid dram pipe laid with the perforation or slots facing down at, or just below, the invert of the footings with a gradient of about 1.5 percent sufficient to initiate flow by gravity. The drain line should be bedded on, surrounded by, and covered with a free -draining material that meets the requirements of the Washington State Department of Transportation (WSDOT) Standard Specifications, . Section 9-03.12(2). See Table 2. A typical drain detail is provided on Figures 4, Typical Footing Drain Detail. Table 3. WSDOT Standard Specifications, Section 9-03.12(2) U. S. Sieve Size 4" square 1/4" square No. 200 * All percentages are by weight Percent Passing* 100 25 = 70 5.0 max. Once the drains are installed they should be backfilled as specified in the trench backfill, Section III.B.7, Trench Backfill. The surface six inches of fill -should consist of compacted and relatively impermeable soil. It can be separated from the underlying more granular drainage material by a layer of geofabric or visqueen. The surface should be sloped to drain away from the building walls. Alternatively, the surface can be sealed with asphalt or concrete paving. - Engineering Geological Services, 4538 Lake Washington Blvd, Kirkland, Wa. 98033, 425 828 3162 13 Martin Residence, R2126b, 3-25 All footing drain lines shall be connected to a storm sewer or detention tank. The downspout discharge lines shall be connected separately from the footing drains to the storm sewer or detention tank. (3) Slab Moisture Barrier To mitigate the passage of moisture through the foundation slab, we recommend that a capillary break consisting of 4-inches of free -draining crushed rock covered with an impermeable membrane moisture barrier (10 Mil visqueen) be placed between the subgrade soil and the slab (Figure 8). The membrane should be covered with 2 inches of moist sand for protection of the membrane and for ease of concrete finishing during construction. D. Construction During Wet Weather Conditions If site grading work proceeds during or shortly after wet:weather conditions, the moisture content of the on site soils will be above optimum. Consequently, subgrade preparation, placement, and/or reworking of the on site and structural fill will not be possible and slope stability may be compromised. Alternative wet -weather construction recommendations can be provide by our offices in the field just prior to construction, if appropriate. We recommend that all construction be held until the period after April 1 and before October 30. Work on critical areas cannot be performed between these dates without a special variance. E. Guide Specifications Rockery construction guidelines are provided in Appendix C. These specifications are general in nature. Final specification should incorporate all recommendations of this report. F. Retaining Walls Several retaining walls will be incorporated into the structural design of the proposed structures. These wall are expected to be up to 10 feet in height. All retaining walls should be designed for the specific location required. Structural fill should be used for backfilling retaining walls. The design work for these walls should utilize the parameters provided in, Table 4, Retaining Wall Soil Parameters. Table 4. Retaining Wall Soil Parameters Soil Type Friction Angle Consistency Density Equivalent Fluid Weight Active (pcfl Passive(pcf) Clay 10 very stiff 120 80 170 Sand 30 Very Dense 120 30 350 The allowable bearing pressure for the site soils located at depths greater than 15 feet is 3,000 psf. All soils located below 10 feet maybe given allowable soil bearing pressures of 1500 psf. The upper surficial on -site. soils relate to the colluvial deposits identified in the borings located on site. Enguxxring Geological Services, 4538 Lake Washington Blvd., Kirkland, Wa. 98033, 425 8283162 14 Martin Residence, R2126b, 3-2: _Y. Any rockeries used on site should be limited to four feet in height and not used as retaining walls unless specifically designed by a geotechnical engineer. Rockeries shall be constructed in accordance with the Association of Rockery Contractors Guidelines (1989) that are included as Appendix C. Rockeries should be designed for the specific site application. Therefore, a typical rockery plan is not included. G. Slab -on -Grade Slab -on -grade floors, if used, should be placed on unyielding subgrade soil topped with a minimum of 6-inch layer of crushed rock, Figure 5, Slab -on -Grade Typical Drawing. Slab -on - grade subgrade surfaces should be proof rolled to provide a smooth unyielding surface for slab support. Slab reinforcing should be provided in accordance with the anticipated use and loading conditions. If the slab is not supported on unyielding subgrade soils, slab damage in the form of warping, cracking, and separation caused by differential settlement may occur. The slab will then require periodic maintenance. If the situation is acceptable from an economic standpoint, then this option for slab support can be used. We recommend that the slab be reinforced with #4 rebars, 18 inches on center. However, the slab should be designed by a structural engineer for the anticipated use and loading. H. Conventional Foundations If conventional spread footings are planned for the garage and residence, the surficial soils will have to be excavated to at least 10 feet depths. This surficial soils should be disposed of off site. Upon exposure of the soils at 10 feet, we recommend that the geotechnical engineer be on site to verify the sound bearing soils at that elevation. Additional excavation may be required. Final grade must be verified by the engineer. The allowable soil bearing capacity of the soils at the various levels are: 10 to 15 feet. ....................................... 2,000 psf below 15 feet ....................................... 3,000 psf All footings must be located a minimum of 18 inches below final exterior grade for frost protection purposes. The minimum width should be 18 inches for strip footings and 24 inches for individual footings. I. Pile Foundations We recommend that deep foundations penetrating through the surficial loose colluvium deposits and transferring foundation loads to the underlying very stiff clay and/or dense sand be used for supporting the buildings. Steel pin piles and drilled piers are considered and are discussed in the following sections. Engineering Geological services, 4538 Lake Washington Blvd., Kirkland, Wa. 98033, 425 828 3162 15 Martin Residence, R2126b, 1. Steel Pin Piles Pin piles are composed of sections of small -diameter (usually with an outside diameter ranging from 2.5 to 4.5 inches) steel piles that can be driven into the ground with a pneumatic jackhammer or a small mechanical pile driving hammer. With the light equipment used, pin piles can be installed economically on sites of poor access. Because of their slenderness, pin piles have little capacity against lateral loads. Pile groups to include slanted piles or tieback anchors may be used for lateral load resistance. We recommend that 4.5 inch outside diameter, Schedule 40 steel pipes be used for the pin piles to support the buildings. Pin piles should be driven with a hydraulic mechanical hammer, such as TB 325, 850-pound hammer, with 950 blows per minute when operated at 75% throttle, or a Vulcan DGH 100 differential -acting, 650-pound air hammer operating at 505 blows per minute, both can be mounted on a bobcat body. Pin piles should be driven to penetrate through the loose, surficial colluvial deposits and seated into the underlying very stiff clay and/or dense sand. When driven to "refusal", the 4.5-inch O.D. pin piles should be able to develop an ultimate axial bearing capacity from 18 to 24 tons per pile. Refusal is defined as, at least 20 seconds of continuous driving with the above mechanical hammers for one inch of pile penetration. We recommend an allowable axial bearing capacity not to exceed 18 kips per pile for 4.5-inch outside diameter steel pin piles driven to refusal, based on a factor of safety of 2.0, be used for foundation design of the buildings. Because of their slenderness, pin piles have little capacity against lateral loads. Pile groups to include battered piles may be used for resisting lateral loads on buildings or retaining walls. For long-term corrosion protection, the steel pipes of pin piles should be galvanized or coated with bituminous paint. The joints of sections of the steel pipes should have a full penetration, beveled weld capable of developing a strength of that of the steel pipes themselves. The joints should be field -coated. The bearing capacity of the pin piles should be verified with pile load tests conducted on at least two randomly selected piles per building or with pile wave analyses. The ultimate axial bearing capacity of the piles should be at least 2.0 times the design service load to be carried by the piles. 2. Drilled Piers Drilled piers may also be used for supporting the buildings. Grading of a temporary road and benching are expected for access by the drill rig used for drilled pier installation and; therefore, more disturbance to the site than the pin pile method should be expected. We recommend that 16-inch diameter drilled piers with a minimum embedment of 12 feet into the underlying very stiff clay and/or dense sand deposits to very dense sand from which the axial bearing and lateral resistance of the piers are achieved. Our recommended allowable capacities for 16-inch diameter drilled piers with various embedment lengths are as follows: Enginccnng Geological Services, 4538 Lake Washington Blvd, Kirkland, Wa. 98033, 425 828 3162 16 Martin Residence, R2126b, 3-25-vz. Table 5. Pile Parameters *Pile Allowable Allowable Embedment Axial Bearing Lateral tin Residence, R2126b, 3-25-02 Feet Capacity, Kips Capacity, Kips 12 25 2.5 14 30 3.0 16 36 4.0 18 44 4.5 20 55 6.0 *Pile embedment in very stiff clay and/or very dense sand. The above allowable capacities against vertical and -lateral loads are based on a safety factor of 2.0. No reduction in pier capacities is required if the pier spacing is at least three times the pier diameter. Due to the presence of loose colluvial deposits and perched groundwater in the underlying sand, localized sloughing during drilling of pier holes may occur. If such condition is encountered, temporary casing and/or slurry -assisted drilling method should be used to prevent loss of ground. The drilled holes should be thoroughly cleaned with a mechanical cleaning tool to no more than 1/4-inch accumulation of loose cuttings at the bottom of holes prior to filling the holes with concrete. Groundwater, when encountered, should be dewatered to less than 6 inches of accumulation at the bottom of holes prior to placing concrete. Otherwise, concrete should be pumped or placed with a tremie pipe from the bottom up immediately after rebar cages are inserted in holes. The concrete in the holes should be maintained with at least 6 feet of head above the tip of the tremie pipe at all times during concrete placement. A one-third increase in the above allowable axial and lateral resistance of the pin piles or drilled piers may be used when considering short-term transitory wind or seismic loads. We estimate that the total post -construction settlement for the pin pile or drilled pier foundations should be one half (1/2) inch or less, and the differential settlement across the building width should be one quarter (1/4) inch or less. In addition to the above pier capacities, lateral loads on buildings can also be resisted by the passive earth pressure acting on the basement walls below grade. We recommend that an allowable passive earth pressure on the basement walls should not be greater than 200 pcf EFD, which includes an safety factor of 1.5. This recommendation assumes the ground behind the walls is sloping down away from the walls or level for a horizontal distance at least twice the wall height. I Access Driveway The access driveway will start at the edge of the pavement of the existing driveway to Parcel B. The driveway has been shown on the profile of the site, Profile A -A. The entrance may be moved FAA � am cal ge viceg 4-S&LaN Washington HivQXvkIA4 Wa. 98W, 425 8ZS3j625 2 3162 17 Martin Residence, R2126b, 20 to 30 feet westward if desired to avoid the two maple trees located on the present trace. The driveway would start with a 15 percent gradient, rise to about 25 percent and then flatten to about 15 percent before the parking area in front of the garage. The driveway will be about 20 feet wide for fire truck access and the driveway should turn west along the south of the garage to approach the proposed residence located to the west and north of the garage. The driveway may be graded with the colluvium removed and disposed off site. Rockery retaining walls may be constructed along the driveway to prevent erosion. These rockeries will not be higher than four feet and will not be close to structures. We recommend that the driveway be constructed using 12 inches of structural fill, six inches of crushed rock base course, and two inches of ATB for a temporary wear surface. Following construction, the ATB surface may be capped using Class B asphalt about 2 inches thick. : IV. Construction,. Observation The analysis, designs, opinions, and recommendations submitted in this report are based upon our site observations, knowledge of the site and experience with projects within the area. Variations of subsurface conditions from those analyzed or characterized on the report are possible and may become evident during construction. In that event, it may be advisable to reevaluate certain analyses or assumptions. We recommend that our firm be retained to provide geotechnical services during site grading, foundation excavation, subgrade preparation and backfilling to observe compliance with the design concepts, specifications, and recommendations presented in this report. Our presence will also allow us to modify the design if unanticipated subsurface conditions are encountered. V. Report Preparation This report was prepared by Richard J. Bielefeld, Engineering Geologist. This re port was prepared under the supervision and technical review of J. S. Liu of Liu & Associates, Inc. of Kenmore. Mr. Liu is a registered professional engineer in the State of WaLhjngton specializing in Richard J. Bielefeld, CEG �En g 1 t 4 G s. of w1A5,r `5ION LVA JO' 1 EXPIRES 71171 -2r,) r9 2�- 1 J. S. t Liu esZ---, Engineering Geological Services, 4538 Lake Washington Blvd., Kirkland, Wa. 98033, 425 828 3162 18 FIGURES W ENGINEERENG GEOIDGICAL SYJtVKMS 4533 LAKE WASHINGTON BLVD. ICRUCIAN116WA P14 Na TeL4258=3162 I R2126 VicinityMap Marlin Residence Dd= 4-2-02 Figure 1 Approximate"Fini hed Grade " Slab -on -Grade .I Two inch moist Sand Twa ix#che Visqueen membrane 'soil a e . •► ¢ ■ „! O 8„ I• a ;tiug •Fa_ Gravel base course I Native Soil, undisturbed The soils should be compacted to a relative compaction of 95 percent. ENGINEERIIQG GEOLOGICAL SERVICES 4539 LAKE WASM NGToN BLVD KIRIQ.AM, WA. 98033 TCL 425 929 3162 Typical Slalron-Grade Detail _ Martin Residence a OraI Figure 5 I R2126 4-2- -2 1 I 1 01 BKdMNGIC'GS� .. SOIL TESTING RESULTS UNIFIED SOIL CLASSIFICATION SYSTEM Major Divisions Igrf I ltr I Description Major Divisions 1grf Itr I Description 1p: wclI-traded gravel or gravel sand jinorganic sih andvery tine sand, .� mixtures, little or no s ML4rock 170ur. silty or ef;yey fife sud Silts ! or clayey silt with slight plasticity 0 40And f G Poody-graded gravel or gravel sand mixtures, little Gnu CL Inorganic clay of low to medium Plasticity, gravelly clay, sandy Gravel . And or no ClaysIz clay, silty clay. lean clay I GM Silty vel. gravel -sand -silt ;'� silt and organic silt -clay of Gravely LL < 50 SO113 LOT mixtures Fine OL JOrganic low plasticity Grained GC Clayey gravel. gravel-sandtlav JJIN4 Inorganic silt. micaceous or diatomaceous fine or silty soil, Coarse Soils Grained mixtures Silts elavic silt '. SW Well -graded sand or gravelly sand. CH Inorganic clay of high plasticity, Soils And little or no tines Clays fat clay Sand LL > 50 •-., Sp Paody-graded sand or gravelly C Organic clay of medium to high And sand. little or no fines plasticity Sandy Soils :: SM Silty sands, sand -silt mixtures Highly Organic t Pt peat and other highly organic Sc Clayey sand. sand -clay mixtures Soils 1� soils SYMBOLS mStandard penetration split -swoon sample D- Blank casing ® Modified California (Porter) sample Screened casing Grab (Cuttings) sample a Cement grout Water level observed in boring ® Bentonite Stable water level in monitoring well Filter pact: Sands and Gravels I Blows per Foot Very Loose I 10 - 4 Loose 4 - 10 Medium Dense 10 - 30 Dense 30 - 50 Vim' Dew I Over 50 Silts and Clays I Blows per Foot Very Soft I 0-2 Soft I 2-4 Firm I 4-8 Stiff I 8 - I6 Very Stiff 16 - 32 Hard Over 32 Note(1): Penetration resistance values are recorded as the number of blows of a 140-pound hammer failing 30-inches required to drive a samn3ci through the last 12 inches of an 18-inch drive. Blow count for samples obtained using a Modified California sansoier (indicated by an asterisk) should be multiplied by a factor of 0.8 to obtain equivalent standard penetration resistance values. Note(2): The lines separating strata on the logs represent approximate boundaries only. No warranty is provided as to the continuity of soil strata between borings. Logs mprcscns the soil section observed at the boring location on the date of drilling only_ ENGINEERING GEOLOGICAL SERVICES 4338 LAKE WASMNGTON BLVD KIRKLAND, WA 98033 Tel 425 828 3162 PROJECT NO. I DATE FIGURE No DRILLING METHOD:Track Mounted Auger SURFACE ELEVATION: Arb. 100.00 LOGGED BY: RJB DEPTH TO GROUNDWATER 7 feet BORING DIAMETER: 8 inch DATE DRILLED: 1 - 22 - 02 DESCRIPTION AND CLASSIFICATION UI z OTHER DEPTH (FEET) a- who w C TESTS DESCRIPTION & REMARKS CONSIST 501E TYPE N a m } c ClaY. WK reddish brown, Med StiffI. . .......................... 1096 to 20%fine sand, wet Pebbles present, sandy clay Stiff CI 5 Free water in hole Clay to silt sol, saturated Ivery Stiff - CI . 10 .. ............... ............... .... ��- .. .. Layered sift with sand Sand lease about 3' thick 5 - 29.0: Clay-, blue, wet, L 5 Very Stiff Cl15- -...._V-1 _. .......... ........ ..__.. ------ .. -- ..... Very.Stiff Cl.- CH .... -•- -•- - . .............................. . ........ ......_._. _ .�...... _._.... ............. .... ............ ......... ........... H ............ ...... . .... . EXPLORATORY BORING LOG ENGINEERING GEOLOGICAL SERVICES Martin Residence 4538 LAKE WASHINGTON BLVD KIRIG.AND, WA_ 98033 TeL 425 828 3162 PROJECT W DATE BORING No B - 1 R2126 1 - 24 - 02 AEC Form Frle: Boring.ter DRILLING METHOD: SURFACE ELEVATION: LOGGED BY: DEPTH TO GROUNDWATER BORING DIAMETER: DATE DRILLED: DESCRIPTION AND CLASSIFICATION Qw OTHER DEPTH (FEET) aWJ 0� 5 Ili F Iz z TESTS v r DESCRIPTION & REMARKS CONSIST OIL TYPE W w w S T T. a o Very Stiff CI - CH - .............. Continued ... __ ....................... Clay, blue . B 1-4 � ............:._.........__. __..._... s..---- ......... - --.-.w. _......... .. ..........._ ... ............. Pebble with sand lenses .. ......... .... .. . -...---•«Y« te r[ .....i,.-- 29-0 - 38.o: Sand, gravelly; trace of Vey Dense P - P 30 Mist .:............... olive brown, .,..........«.... ...... ....... •..... .---+---. ...... •-••----• _..-- --------- --..».... ....... ................ ............................... pebbles, ---•--......-w... ................ 25 Layered gravelly sand and clayey sand 35 38.0 to bottom: Clay. blue, moist of VeryDense ISp - CI Very stiff CH ....... 8 40 B-1-7 13 Gradation EXPLORATORY BORING LOG ENGINEERING GEOLOGICAL SERVICES Martin Residence (Page 2of2) 4538 LAKE WASH NGTON BLVD KIRKI.AND, WA 98033 TeL 425 828 3162 PROJECT W DATE BORING B R2126 AEC Form File: Boring:te SURFACE ELEVATION: 85.0 arb datum LOGGED BY: RJBDATE ' DRILLING METHOD: Track mounted Auger DRILLED: 1 - 22 - 02 DEPTH TO GROUNDWATER Not determined BORING DIAMETER: jr auger DESCRIPTION AND CLASSIFICATION W W M�' OTHER DEPTH (FEET) ¢ 11519DESCRIPTION ztit TESTS &REMARKS CONSIST SOIL TYPE rA ca 013 0 3 0.0 - i4.W: Clay, silty to sandy; yellow Soft.... ;-- ....�......... ................. ..----•._.. _...-----•.. .�....__ .._...._......._. brown, wet, sand lenses present .................... Layered, oxidized, silty sand, with clay Med. Stiff Cl 5 ............ I... B-2-1 3 5 Mottled silty sandy clay Stiff Cl 10 .... �..... •_--••- ................. B-2 2 3 36.2 ..........••. .... 6 14.0 - 23.0 Clay, blue, fine sand and sift, 15 .........._ o)ddized zones, moist 1-� - - -_ CH B - 2 - 3 ery Stiff CI -CH _,"„• __ 6 ................... ..... . .._... »... .................. V Stiff . CI - CH B - 2 - 4 11 23.3 .......... ..................�. y, ........ .......... . Clay, blue ..._�......................... .f?- bottom: sand, gravelly moist, olive ................. ............... brown to yellow brawn , EXPLORATORY BORING LOG ENGINEERING.GEOLOGICAL SERVICES Martin Residence 4538 LAKE WASHINGTON BLVD KIRKLAND, WA. 99033 TeL 425 828 3162 PROJECT No DATE BORING w B-2 R2126 1 - 22 - 02 AEC Form File: Boring.b DRILLING METHOD: SURFACE ELEVATION: LOGGED BY: DEPTH TO GROUNDWATER BORING DIAMETER: DATE DRILLED: DESCRIPTION AND CLASSIFICATION Z TH (FEET) o: OTHER TESTS DESCRIPTION & REMARKS CONSIST SOIL TYPE ,�j, ,'gym a it Continued: Very Dense CI - Sc 25 .: ................. Sand, gravely; olive brown, moist ......... . .........__............ B-2-5 11 ......._ ._ 13 30 ................._..... - - - .._.............. Sand, olive brawn, dry ._--------- Very Dense -...... ........ Sc - Cl ....... .... ..... ............ . -.. - 6 .._.»...... 1 Gradation .._— ..... —. ... ...................-------•-•-• ----------- - 25 ----. ............ ............ ............ .... ........ ........ Bottom of hole: 31.5 feet EXPLORATORY BORING LOG ENGINEERING GEOLOGICAL SERVICES Martin Residence (Page 2 of 2) 4538 LAKE WASHINGTON BLVD KUUU AND, WA. 98033 Tel. 425 828 3162 PROJECT W DATE BORING NO B _ 2 R2126 AEC Form File: Boring -tern U.S. SIEVE OPE24ING IN L Es I US. SIEVE NUMBERS I HYDROICE= 1 4 . I . , I — 112 3 . 6 . 10 ,..16 , 30 , 50 --n 100 -,n 200 0 10 c T60 13 Y -Lo Yv E I G'2 H T m- 10 0 Emu im m:1 �iHII ��iiu ni�o� m Hill Hui 111111M11MIME111 [HUYU-11111 Hill 110=1 1�mil 1uu iu - 1 1--: 0.1 0.01 0.0 CRALN S= IN MILL' -ME —Lc--IS COBBLES GRAVEL SAND ISU:7 OR CA -AY li coarse fine !coarse I medium I fine Speci== idendficadon C1aSSifiC2Ei0n WC l %,Gavei I Wand %Silt %Cay B - 1 - 6 Clayey Sand # 0 5 31 8 46.2 -B - 2 - 6 I Clayey Sand 0 56.0 44 ENGINEERING GEOLOGICAL SERVICES 4538 LAKE WASMGTON BLVD. 30R1(LAMD.WA,98033 Tel. 425 $23 3162 GRADATION CURVES, AST.ML D-422 MARTIN RESIDENCE PROJECT 140. DATE FIGURE Na SINE ANALYSIS A.A.R TESTING LABORATORY, INC. P.O: BOX 2523 REDMOND, WA. 98073-2523 (425) 881-58I2 (425) 881-544I Fax MARTIN RESIDENCE GRY SILTY SOIL SAMPLED BY: 11' RJ.B F04>' ._ 02-118 .:.. 030 ................................................. F a E.NP' 3 #10 75.4 #20 71.4 #40 66.1 #100 52.9 #200 46.2 WNO SPEC - CONFORMANCE NON CONFORMANCE T SMD BY: CALCULATED BY. CHECKED BY: 1/31/02 B-1-6 1/22/02 NM<E HOLTZ X41KE HOLTZ A. HALE " IVADVIG` f�WEISYMWE(..Si+O] hiY.'�Em` -acre I TiMi-C33:. AST:M C11 . :::::: ASTI. THIS REPORT SHALL NOT BE REPRODUCED, EXCEPT IN FULL, WITHOUT THE WRITTEN APPROVAL OF A.A.R. TESTING LABORATORY, INC. Q: SOMS—LAMFINAUC I36—R DOC SIEVE E ANALYSIS A.A.R. TESTING LABORATORY, INC. x 55 i : ;"}'� 02-118 P.O. BOX 2523- REDMOND, NVA. 98073-2523 ?'? `: 3t, ` ;:`:` 031 (425) 881-5812 (425) 88I-5441 Fax ........... `:.... 11 "2 1' �..... MARTIN RESIDENCE ` I.... R-LB , .' fa GRY MED SAND W! AGG � B-2-6 SAM RI.B 1/22/02 :: r'::<� ma`s 4`•: s•;°r . s 3d3:, 87.2 #10 #20 96.0 #40 82.3 #100 562 #200 44.0 < t NO SPEC r _ f =r NON CONFORMANcI� . ASiTm.L33 TFSTEDBY: MEKE HOLTZ CA ,CLTI ATED BY: MIKE HOL'FZ CHFAZI u BY: A_ HALE THIS REPORT SHALL NOT BE REPRODUCED, EXCEPT IN FULL, WITHOUT THE WRITTEN APPROVAL OF A.A-R. TESTING LABORATORY, INC. C:\S0R S-1-e 5*Tl FAI,IC136-F DOC WAXER CONTENT ASTM D 2216 / ASTM C566 A.A.R. TESTING LABORATORY, INC. .. ................... �. 02-I18 P.O. BOX 2523 REDMOND, WA. "073-2523 (206) 881-5812 (206 881-5441 Fax «>- ....... >f.,.........._...... 1/30/02 PA(W CT: MARTIN RESIDENCE R.J_B ...... BRN SILTY SOIL:.,..., .. '. B-1-2 MFE#BY:.; R_J.B-,.-...- 1/22102 IF MATERIAL IS AVAILABLE AVERAGE 2 TESTS BASED ON WEIGHTS ASTM D 2216, SECTION 8.2 AEI Weights in Grams •,.sss-k. Mi E HOLTZ f -CA M1KE HaLTZ M . . A. HALE THIS REPORT SHALL NOT BE REPRODUCED, EXCEPT IN FULL, WITHOUTTHE WRITTEN APPROVAL OF A.A.R. TESTING LABORATORY, INC. C:15C7ii.,rrL-U31TESfSM216.DOC WATER CONTENT ASTM D 22161 ASTM C566 A.A.R. TESTING LABORATORY, INC- P.O. BOX 2523 REDMOND, WA. 98073-2523 MR ........ 028 (206)881-5812 (1/30102 206 881-5441 Fax .HAT L: SAMPLED Big: MARTIN RESIDENCE BRN SILTY SOIL Wl CLAY R.J.B sszsss RJ—B B —2-2 DATE SAMPLED- . 1/22/02 IF MATERIAL IS AVAILABLE AVERAGE 2 TESTS BASED ON WEIGHTS ASTM D 2216, SECTION 8-2 jt 36.2% 7 All Weights in Grams c 11. WI.M. kk MIKE HOLTZ NIDM HOLTZ A- HALE THIS REPORT SHALL NOT BE REPRODUCED, EXCEPT IN FULL, WITHOUTTHE WRITTEN APPROVAL OF A.A.R. TESTING LABORATORY, INC. C:lSol-L1,-L-U3ITT-S=2216.1)OC WATER CONTENT ASTM D 2216 / ASTM C566 A.A.R. TESTING LABORATORY, INC. FJLENO.z 02-118 ........ ... P.O. BOX 2523 REDMOND, WA- 98073-25223 L4B No 029 (206) 881-5812 (206 881-5441 Fax 1/30/02 ........... I -------- ........ ........... .... ----- - W"", RJJ3 MARTIN A --- l BRN SILTY SOIL W/ CLAY B-24 D- 1122/02 .-SAMPLED BV� R-1B IF MATERIAL IS AVAILABLE AVERAGE 2 TESTS BASED ON WEIGHTS ASTM D 2216, SECTION 8.2 ... ......... 23.3% All Weights in Grams NEXE HOLTZ MIKE HOLTZ A- HALE THIS REPORT SHALL NOT BE REPRODUCED, EXCEPT IN FULL, WITHOUT THE WRITTEN APPROVAL OF A.A.R. TESTING LABORATORY, INC. Q'SOILS-1-AMTESTS02216.DOC APPENDIX B I STABILITY ANALYSES DATA SHEETS n.km.,' A` 0 0 IN [7 IN O) i[� li n n l7 Q •v 4 Im r• +N N -•� � S.7 12 c NN[•)nQ)cUn or r)nn61 [7 [V W I� D) ❑ LL TO iu') m 0 v rn- FID O)Ono W •r Q I(] � n n� CJ U W mID O F W [�Ipp NQ tTNfn7nit�)N@n P'1 rAA l'�7 ry Q In � � "ti)r�lnn �$rN+vni lr�i t0� O m n m nr`��nn IT M Q -qi9171p N T- W� ONw 6O0D �Q O!•: m r �Il�n lR D m � $u��gmmr-rq 1"7 I'D r l'.] LL IN cd c7 1� �q 17 ID tD N N Q N 0 �D ID 0 0 0 yypp a O@ N W Ul D 1� In N � O N W IZ x Ir C7 r Lr Y) V It7 to o � m 1 :Coo $ �:to nW1,)"D1-Dm°) m o f7 �N Q m N IA7 ry Q •N o Q 'V 'Q D DID o v v D O C7 O G D ID d o d o O ID D CJ J Ia Tool U L U JC l] N ry N NN IN IN INNNN OO 1D 000 m µW � C J O a� O w m m W U h C A m U � U Do 0 D o D o o ID C) ID o ID d o O o o c ff m R C � fD R N w pOru� 1[7NmNIh N1m00 [r-Y G U 4 a a- �Nn omm O �OS7l vl in m r"p Vita Co U a m � u) f"p P I- O n r 1[7 J U q b C) 0 G U d s h v`wi L° c ervn a to vwo v ~ c v o a)mm� N 7�U~ C in � pip LtyV Lh 6 n 48 N rr d oion tC, _ M :n c o it) cD c) (bbun rmW coQlnDc +��NNN 0) � N Cp V I(70).-I[)Am NC7 �CNN1G)o+DO o 00 0 c - :�In4ror ri a rpon. tl[ q�7 to m { C m .�Z 1�`) rt0 N F�1 7 Q V Cl) [Y E E O D l0 O D D 0 0 0 D b D o ID O O C) O w 7E rm� a Q Q �f71P)NI E E 7� ui h v to mUvS m oa oav + Y + 7 W r Nt'fnMr) cyi NN to .11 N 0 o)n Udod4 p0 (L IfV N IN im ID O tv (U N r + 0.d I +N IN M1�) l7 N � 10 to }3 } E 30 13 CV fV _N,NN o o ID ONNIN p yO Y � LL LL 15 w ± Mi rn f3oa m.- mmQ mmNNlu)o0loovv ' W popa�a�pj,onrn � U �p�p�rcaa,o N O A X m tq O606 oL1 Cid O 0dod O can r~O� Co iitf(p]1 l0 O UNO V� f� ��n W) W Q') ED iG 0 M acod© DID ooDoc. 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Z� •`� '7 E E guwwn znou3dddppdvdvvv m it 'Iy� 0)o 7 c Daui o m E E + Y + Y7 O4741 Y)ti1 [ONO Q R o IDOQ iDQ Q MID m ID m E C C4 E .Q m p �i7 !6v,'ry r'� r vpdd rCL vp0 v0Opvp w + + d r .N •N N I� �� t3 E E rrl+I�1+� IrdvvQ QO6ORap S B h 0 ILL t`11p{�1 CD NOD 0 aI �0d •O d p p d O o 0 O {0y C .w 4 O o D O O mr�tyr MID m L �H rr Qj GG 01 Q t7 �Cr�Gb �D W �p U OOO�[ip i0 p m t►".._-�J11l7t rti vo op ID onObpp D •� vim' m M 7 v7 m r m W O.. •r �r rvMT�iaTmWioo IN IF- APPENDIX C ARC RGCKERY GUIDELINES L\ Association of Rockery Contractors Standard Rockery Construction Guidelines 1.01 INTRODUCTION 1.01.1 Historical Back und: These standard rockery construction guidelines have been developed in an effort to provide a more stringent degree of control on rockery materials and construction methodology in the Pacific Northwest_ They have been assembled from numerous other standards presently in use in the area from expertise provided by local geotechnical engineers, and from the wide experience of the members of the Association of Rockery Contractors (ARC). 1.01.2 Goal: The primary goals of this document are to standardize the methods of construction for rockeries over four feet in height, and to provide a warranty for the materials used in construction and the workmanship employed in construction. This standard has also been developed in a manner that makes it, to the best of ARC'S knowledge, more stringent than the other standards presently in use by local municipalities. 2.01 MATERIALS 2.01.1 Rock Quality: All rock shall be sound, weathering resistant; angular ledge rock. The longest dimension of any individual rock should not exceed three times its shortest dimension. Acceptability of rock will be determined by laboratory tests as hereinafter specified, geologic examination and historical usage records. All rock delivered to and incorporated in the project shall meet the following minimum specifications: a. Absorption b. Accelerated Expansion (1 S days) (CRD-4C-148) -1. "2 C. Soundness (MgSO4 at S cycles) (CRD-C-137) d. Unconfined Compressive Strength AS7M D-2938-79 (reapproved 1979) Not more than 2.0% for igneous and metamorphic rock types. Not more than 3.0% for sedimentary rock types. Not more than 15% breakdown Not greater than S% loss Intact strength of 15, 000 psi or greater for igneous and metamorphic rocks, and 8,000 psi orgreaterfor sedimentary rock 01, The test sample will be prepared and tested in accordance with the Corps of Engineers Testing procedure CRD-C-148, 'Method of Testing Stone for F.xparlsive Breakdown on Soaking in Ethylene Glycol. " Test requirements of not more than 15 percent breakdown will be computed by dividing the number of individual pieces of initial sample suffering breakdown that is, separating into two or more pieces by the total number of initial pieces in the sample. 62. Accelerated exparrsiopr tests should also include onal3 ses of the fractures and veins found in the rock Many problems associated with rockeryfailures are related to the rock fractures and veins found within the rock and not the rock itself. Page I Source: Association of Rockery Contractors, P.O. Box 1794, Woodinville, WA 98072 4/4/89 Tel. (425) 481-3456 o Fax. (425) 481-7222 2.01.2 Frequency of Testing: Quarry sources for rockery rock shall begin a testing program when either becoming a supplier or when a new area of the source pit is opened. The tests described in Section 2.01.1 shall be performed for every four thousand (4,000) tons for the first twelve thousand (12,000) tons of material blasted and removed to established that specific rock source. The tests shall then be performed once a year or at an apparent change in material. If problems with a specific area in a pit or with a particular material are encountered, the initial testing cycle shall be restarted. 2.01.3 Rock Density: Recognizing that numerous sources of rock exists, and that the nature of rock will vary not only between sources but also within each source, the density of the rock shall be greater than one hundred fifty-five (155) pcf. Typically, rocks used for rockery construction shall be sized approximately as follows: Rock Size Rock Weight Small to large one man 50-200 pounds Small to large two man 200-700 pounds Small to large three man 700-2000 pounds Small to large four man 2000-4000 pounds Five man 4000-6000 pounds Six man 6000-8000 pounds Two and one-man rock and sometimes smaller are often used to fill surface gaps along the top of the completed rockery to create an aesthetically pleasing surface. This is an acceptable practice provided none of the events described in Section 3.01.5 occur and that the owner prevents people from climbing or walking on the completed rockery. In rockeries over eight feet in height, it should not be possible to move the large -sized rocks (four to six -man size) with a prybar. If these rocks can be moved, the rockery should not be considered capable of restraining any significant lateral load. However, it is both practical and even desirable that smaller rocks, particularly those used for "chinking" purposes can be moved with a prybar to achieve the "best fit". 2.01.4 Submittals: The rock source shall present current geologic and test data for the testing for the minimum guidelines described in Section 2.01.1 on request by either the rockery contractor, the client, or the applicable municipality. Page 2 Source: Association of Rockery C.ormactors, P.O. Box 1794, Woodirrville, WA 98072 4/4/89 Tel. (425) 481-3456 • Fax. (425) 481-7222 Association of Rockery Contractors Standard Fodcery Construction Guidelines 3.01 ROCKERY CONSTRUCTION 3.01.1 General: Rockery construction is a craft and depends largely on the. skill and experience of the builder. A rockery is a protective system which helps to retard the weathering and erosion process on an exposed cut or fill soil face. While by its nature (the mass, size and shape of the rocks), it will provide some degree of retention. It is not a designed or engineered system in the sense a reinforced concrete retaining wall would be considered designed or engineered The degree of retention achieved is dependent on the size of rock used, that is, the mass or weight and the height of the rockery being constructed. _The larger the rock, the more competent the rockery. To accomplish this, all rockeries in excess of four feet in height should be built on a "mass" basis. To provide a competent and adequate rockery structure, all rockeries constructed in front of either cuts or fills in excess of eight feet in height should be bid and constructed in accordance with these standard guidelines and the geotechnical engineers supplemental recommendations. Both the standard guidelines and the supplemental geotechnical recommendations should be provided to prospective bidders before bidding and the start of construction. The same geotechnical engineer should be retained to monitor rockery construction and to verify, in writing, that the rockery was constructed in general accordance with this ARC standard and with this supplemental recommendations, in a. professional manner and of competent and suitable materials. 3.01.2 Geotechnical Engineer The geotechnical engineer retained to provide necessary supplemental rockery construction guidelines shall be a practicing geotechnical/civil engineer licensed as a professional civil engineer in the State of Washington who has at least four years of professional employment as a geotechnical engineer in responsible charge, including experience with fill construction and stability and rockery construction. The geotechnical engineer should be hired either by the rockery contractor or the client. 3.01.3 Res onsibili : The ultimate responsibility for rockery construction should remain with the rockery builder. However, rockeries protecting moderate to thick fills, with steep sloping surfaces above or below them, with multiple steps, with foundation or other loads affecting them, protecting sandy or gravelly soils subject to raveling with seepage or wet conditions, or that are more than eight feet in height, all represent special conditions and require consultation and/or advice from qualified experts. 3.01.4 Workmanship: All workmanship is guaranteed by the rockery contractor and all materials are guaranteed by supplying quarry for a period of six years from the date of completion of erection, providing no modification or changes to the conditions existing at the time of completion are made. 3.01.5 Chan es to Finished Product: Such changes include, but are not necessarily limited to excavation of ditches or trenches within a distance of less than 1.5 times the rockery height measured from the toe of the rockery, removal of any material from the subgrade in front of the rockery, excavation and/or removal of material from any location behind the rockery within a distance at least equal to the rockery's height, the addition of any surcharge or other loads within a similar distance of the top of the rockery, or surface or subsurface water forced, directed, or otherwise caused to flow behind the rockery in any quantity. Page 3 Source: Association of Rockery Contractors, P.O_ Box 1794, Woodinville, WA 98072 4/4/89 Tel. (425) 481-3456 • Fax. (425)181-7222 Association d Rockery Contractors Standard Rockery Construction Guidelines 3.01.6 Slopes: Slopes above rockeries should be kept as flat as possible, but should not exceed 2:1 (HorizontalNertical) unless the rockery is designed specifically to provide some restraint to the load imposed by the slope. Any slope existing above a completed rockery should be provided. with a vegetative cover by the owner to help reduce the potential for surface water flow induced erosion. It should consist of a deep rooted, rapid growth vegetative mat and typically will be placed by hydroseeding and covered with a mulch. It is often useful to overlay the seed and mulch with either pegged in -place jute matting, or some other form of approved geotechnical fabric to maintain the seed in -place until the root mat has an opportunity to germinate and take hold. 3.01.7 1ylo6tadng: All rockeries constructed against cuts or fills in excess of eight feet in height shall be periodically monitored during construction by the geotechnical engineer to verify the nature and quality of the materials being used are appropriate, that the construction procedures are appropriate, and that the rockery' being constructed in a generally professional manner and in accordance with this ARC standards and any supplemental recommendations. On completion of the rockery, the geotechnical engineer shall submit to the client, the rockery contractor, and to the appropriate municipality, copies of his rockery examination reports along with a final report summarizing rockery construction. 3.01.8 Fill Cam action: Where rockeries are constructed in front of a fill, it is imperative that the owner ensure the fill be placed and compacted in a manner that will provide a competent fill mass. To achieve this goal, all fills should consist of relatively clean, organic and debris —free granular materials with a maximum size of four inches. Ideally, but particularly if placement and compaction is to take place during the wet season, they should contain no more than five percent fines (silt and clay size particles passing the number 200 mesh sieve). All fills should be placed in thin lifts not exceeding eight inches in loose thickness. Each lift should be compacted to at least 95 percent of the maximum dry density, as determined by ASTM Test Method D-1557- 78 (Modified Proctor) before any additional fill is placed and compacted In -place density areas tests should be performed at random locations within each lift of the fill to verify this degree of compaction is being achieved 3.01.9 Fill Construction and Reinforcement: There are two methods of constructing a fill against which to build a rockery. The first, which typically applies to rockeries of less than eight feet in height, is to overbuild and then cut back the fill. The second, which applies to all rockeries in excess of eight feet in height, is to construct the fill using a geogrid or geotechnical fabric reinforcement. Overbuilding the fill allows for satisfactory compaction of the fill mass out beyond the location of the fill face to be protected. Overbuilding also allows the earthwork contractor to use larger and more effective compaction equipment in his compactive efforts, thereby typically achieving a more competent fill mass. Cutting back into the well compacted fill also typically results in construction of a competent near vertical fill face against which to build the rockery. For the higher rockeries, the use of a geogrid or geotechnical fabric to help reinforce the fill results in construction of a more stable fill face against which to construct the rockery. This form of construction leads to a longer lasting and more stable rockery and helps reduce the risk of significant long term maintenance. Page 4 Source_ Association of Rockery Contractors, P.O. Box 1794. Woodinville, WA 98072 4/4/89 Tel. (425) 481-3456 - Fax (425) 481-7222 Association of Rockery Contractors Standard Pocicery Contirstnx-tion Gradelines This latter form of construction requires a design by the geotechnical engineer for each specific case. The vertical spacing of the reinforcement, the specific type of reinforcement, and the distance to which it must extend back into the fill and the amount of lapping must be determined on a rockery -by -rockery basis. 3.01.10 Rocke K a : The first step in rockery construction after general site clearing and/or general excavation, is to construct a keyway in which to build the rockery. The keyway shall comprise a shallow trench of between 12 and 18 inches in depth, extending for the full length of the rockery, and inclined back slightly towards the face being protected. It is typically dug as wide as the rockery (including the width of the rock filter layer). If the condition of the protected face is of concern, the keyway should be constructed in sections of manageable length, that is of a length that can be constructed in one shift or one day's work. The competency of the keyway subgrade to support the rockery shall be verified by probing with a small diameter steel rod. The rod shall have a diameter of between 3/6" and'/2', and shall be pushed into the subgrade in a smooth unaided manner under the body weight of the prober only. Penetration of up to six inches with some difficulty, shall indicate a "competent" keyway subgrade unless other factors in the geotechnical engineer's opinion shall indicate otherwise. Penetration in excess of six inches or of that depth with ease, shall indicate a "soft" subgrade and one that could require treatment. Soft areas of the subgrade can be "firmed up" by tamping a layer of coarse quarry spalls into the subgrade. 3.01.11 Kqmay and Rockely Drain e: On completion of keyway excavation, a shallow ditch or trench approximate 12 inches wide and deep, should be dug along the rear edge of the keyway. A minimum four -inch diameter perforated or slotted ADS drain pipe, or equivalent approved by an engineer, should be placed in this shallow trench and should be bedded on and surrounded by a free -draining crushed rock Burial of the drain pipe in this shallow trench provides protection to the pipe and helps prevent it from being inadvertently crushed by pieces of the rockery rock. This drain pipe should be installed with sufficient gradient to initiate flow and should be connected to a positive and permanent discharge. Positive and permanent drainage should be considered to mean an existing or to be installed storm drain system, a swale, ditch or other form of surface water flow collection system, a detention or retention pond, or other stable native site feature or previously installed collection system. 3.01.12 Rockery Thickness: The individual rockery thickness including the rock filter layer should be at least 40 percent of the rockery height. Unless otherwise specified in writing by the rockery "designer", the individual rocks should be arranged in a single course which when measured to include the filter layer, is equal to the required rockery thickness. Page 5 Source: Association of Rockery Contractors, P.O. Box 1794, Woodinville, WA 98072 4/4/89 Tel. (425) 481-3456 ■ Fax. (425) 481-7222 Association of Rodcery Contractors Standard Rockery Comtnx-tion Guidelines 3.01.13 Rock Selection: The contractor should have sufficient space available so that he can select from among a number of stockpiled rocks for each space in the rockery to be filled Rocks which have shapes which do not match the spaces offered by the previous course of rock should be placed elsewhere to obtain a better fit. Rock should be of a generally cubical, tabular or semi -rectangular shape. Any rocks of basically rounded or tetrahedral form should be rejected or used for filling large void spaces. Smaller rocks (one to two -man size, or smaller) are often used to create an aesthetically pleasing "top edge" to a rockery. This is acceptable provided none of the events described in Section 3.01.5 occur, and that people are prevented from climbing or walking on the finished rockery. This is the owner's responsibility. 3.01.14 Rock Placement: The first course of rock should be placed on firm unyielding soil. There should be fWl contact between the rock and soil which may require shaping of the ground surface or slamming or dropping the rocks into place so that the soil foundation conforms to the rock face bearing on it. As an altemative, it is satisfactory to place and tamp crushed rock into the subgrade to tighten it up. The bottom of the first course of rock should be a minimum of 12 inches below the lowest adjacent site grade. As the rockery is constructed, the rocks should be placed so that there are no continuous joint planes in either the vertical or lateral direction. Each rock should bear on at least two rocks below it. Rocks should be placed so that there is some bearing between flat rock faces rather than on joints. Joints between courses should slope downward towards the material being protected (away from the face of the rockery). 3.01.15 Face Inclination: the face of the rockery should be inclined at a gradient of about 1:6 (H:V) back towards the face being protected. The inclination should not be constructed flatter than 1HAV. 3.01.16 Voids: Because of the nature of the product used to construct a rockery, it is virtually impossible to avoid creating void spaces between individual rocks. However, it should be recognized that voids do not necessarily constitute a problem in rockery construction. Where voids of greater than six inches in dimension exist in the face of a rockery, they should be visually examined to determine if contact between the rocks exist within the thickness of the rockery. If contact does exit, no further action is required. However, if there is no rock contact within the rockery thickness the void should be "chinked" with a smaller piece of rock. If a void of greater than six inches exists in the rear face of the rockery, it should be "chinked" with a smaller rock. 3.01.17 Filter Layer: In order to provide some degree of drainage control behind the rockery and as a means of helping to prevent loss of soil through the face of the rockery, a drainage filter shall be installed layer between the rear face of the rockery and the soil face being protected. This filter layer should be at least 12 inches thick and for rockeries in excess of eight feet in height, it should be at least 18 inches thick It should be composed of four -inch minus crushed rock or other material approved by the geotechnical engineer. If one of the rockery rocks extends back to the exposed soil face, it is not necessary that the filter rock layer extend between it and the soil face. Page 6 Source: Association of Rockery Contractors, P.O. Box 1794, Woodinville, WA 98072 4/4/89 Tel. (425) 481-3456 a Fax. (425) 481-7222 •..�• • '•. - • 1 .• • In the event seepage is encountered emanating from a protected face, we recommend the use of a well -graded filter layer. We do not recommend the use of a geotechnical fabric for other than coverage of relatively small and isolated seepage areas because it has been the 'industry Is experience that the filter fabric tends to clog rapidly. This quickly leads to a buildup of hydrostatic pressure which can subsequently cause failure and collapse of the rockery and is to be avoided. This clogging is apparently due to the virtual impossibility of achieving fill contact between the soil face, fabric and rock filter material. If M surface contact cannot be achieved, there is often a tendency for the soil materials to flush from the protected face into the "pockets" in the fabric which leads to the aforementioned clogging. 3.01.18 Surface Drainage: It is the owner's responsibility to intercept surface drainage from above the rockery and direct it away from the rockery to a positive and permanent discharge well below and beyond the toe of the rockery. Use of other drainage control measures should be determined on a case -by -case basis by the geotechnical engineer prior to bidding on the project. Page 7 Source: Association of Rockery Contractors, P.O. Box 1794. Woodirnille, WA 98072 4/4/89 Tel. (425) 481-3456 a Fax. (425) 481-7222 ,i NOTES: Crushed rock filter material ranging between 4 and %2 inches in size and free of organics, with less than 5% fines (silt and clay size particles passing the NO 200 mesh sieve). Compacted structural fill consisting of free—dranung, organic —free material with a maximum size of 4 inches. Should contain no more than 5%fines (described above), compacted to at least 95% of ASTM D-1557-78 maximum density. Perforated or slotted drain pipe with 4—inch minimum diameter bedded on and surrounded by crushed rock filter material, described above. Designates size of rock required, i.e. 4—man. ■ All fill should be placed in thin lifts not exceeding 6 inches in loose thickness. Each layer should be compacted to no less than 95% of maximum dry density, as determined by ASTM D-1557-78 (Modified Proctor). • Thickness of crushed filter rock layer, B, should be no less than 18 inches. • Depth of burial of basal layer of rock, D, should be no less than 18 inches. • Height of rockery, H, should not exceed 8 feet. - TYPICAL DETAIL ENGINEERING GEOLOGICAL SERVICES 4538LAIMWASIIINGTON19LVD. ROCKERY LESS THAN 8 FT IGRM A", WA., "033 TeL 425 828 3162 Project N2 Date Figure Ns LO Crushed rock filter material ranging between 4 and %2 inches in size and free of organics, with less than 5% fines (silt and clay size particles passing the Na 200 mesh sieve). Compacted structural fill consisting of free— raining; organic —free material with a maximum size of 4 inches. Should contain no more than 5%fines (descnl�ed above), compacted to at least 95% of ASTM D-1557-78 maximum density. Tensar SS-1 geogrid, Mirafi, or equivalent reinforcement approved by geotechnical engineer. Perforated or slotted drain pipe with 4—inch minimum diameter bedded on and surrounded by crushed rock filter material, described above. Designates size of rock required, i.e. 4—man NOTES: • All fill should be placed in thin lifts not cxcecding 6 inches in loose thickness. Each layer should be compacted to no less than 95% of maximum dry density, as determined by ASTM D-1557-78 (Modified Proctor). * Height of rockery, H, should not exceed 18 feet. ENGINEERING GEOLOGICAL SERVICES 4538 LAKE WASHINGTON BLVD. KIRKLAND. WA., 98033 TeL 425 828 3162 TYPICAL DETAIL ROCKERY 8 FT AND 18 FT HEIGHT Project N2 Date Figure N4