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19-104811 (2)wood. Wood Environment & Infrastructure Solutions, Inc. 4020 Lake Washington Blvd NE, Suite 200 Kirkland, Washington 98033 USA T: 425-368-1000 www.woodpic.com August 21, 2019 Project 591717902.001 Ms. Leila Willoughby -Oakes Associate Planner City of Federal Way Community Development Department 33325 8th Avenue South Federal Way, Washington 98003 Subject: Geotechnical 3rd Party Review JLHC Inc. (Youn Residence) XXXX SW Dash Point Road, Parcel 112103-9106, Federal Way, Washington Dear Ms. Willoughby -Oakes, This letter presents the results of our third -party review of the revised geotechnical engineering report for the above referenced project. Specifically, we reviewed the Revised Geotechnical Engineering Report dated March 24, 2017 prepared by GeoResources, LLC (GeoResources). As indicated in your email dated August 12, 2019, the building permit for the project has expired, thus the project is subject to current codes. Our review evaluated GeoResources report for conformance with the current Federal Way Revised Code (FWRC) adopted June 18, 2019, specifically Article II Geologically Hazardous Areas, Chapter 19.145. Project History Wood, (formerly Amec Foster Wheeler, Environment and Infrastructure, Inc.) performed a third -party geotechnical review of the proposed project in November 2016. We reviewed several documents including the Geotechnical Engineering Report, dated May 1, 2014 by GeoResources. Our review comments were documented in our Geotechnical Review of Documents letter dated November 9, 2016. Within our letter, several comments were made concerning items noted within the GeoResources 2014 report. Additionally, we reviewed the following documents in November 2016: • Revised site plans (Sheets C1-C4), revision dated June 23, 2015, prepared by Hagenson Consultants, LLC; and • Response letter to City of Federal Way Planning Division dated June 23, 2015 prepared by Hagenson Consultants, LLC (received by City of Federal Way September 2, 2016). Our comments concerning these documents were also provided within our November 9, 2016 letter. Since we submitted our review letter, GeoResources completed revisions to their original report and submitted a revised report addressing our review comments. This report was provided to us by your email dated August 12, 2019. 'Wood' is a trading name for John Wood Group PLC and its subsidiaries {� Ms. Leila Willoughby -Oakes City of Federal Way August 21, 2019 Page 2 of 2 Review Comments The report by GeoResources adequately addressed the requirements of Article II of FWRC 19.145 in our opinion. Our comments presented within our November 9, 2016 letter have been adequately addressed. We agree with the conclusions of the report; that it appears the proposed project has been designed and located such that it minimizes impact upon the geologic hazards and associated critical areas and does not increase risks for adjacent properties. However, as there are several outstanding comments concerning the project plans and other documents previously reviewed and documented in our November 9, 2016 letter; we recommend those issues be clarified and resolved prior to issuing the building permit. This could be documented by requiring GeoResources to review the final plans and write a letter stating that the plans incorporated their recommendations correctly and thoroughly. Closure We appreciate the opportunity to be of service. It should be noted that our scope of work for this third - party review was limited to a review of the documents supplied to us. Our scope did not include subsurface exploration or engineering analyses, nor does our review purport to verify the accuracy of the geotechnical engineering results presented within the documents. If you have any questions, please contact us at your convenience. Sincerely, Wood Environment & Infrastructure Solutions, Inc. William J. Lockard, LEG Senior Geologist Direct Tel: 425-368-0927 E-mail: bill.lockard@woodplc.com Todd D. Wentworth, LG, PE Principal Geotechnical Engineer Direct Tel: 425-368-0938 E-mail: todd.wentworth@woodplc.com WJL/TDW:aI \\sea-fs1\wordproo-projects\17000s\17902 city of federal way\review letters\007\2019_08-21 review letter revised report.docx