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LMJ Enterprises, LP March 31, 2022 <br />INFILTRATION RATE RECOMMENDATIONS <br />Based on in -situ field infiltration testing within the footprint of the proposed infiltration facility, we <br />recommend a design infiltration rate of 0.15 inches per hour at the location of PIT-1. Infiltration testing was <br />not completed in PIT-2 due to groundwater seepage above the test elevation. We do not recommend <br />planning for stormwater infiltration at the location of PIT-2. <br />REFERENCES <br />Washington State Department of Ecology, 2019, "2019 Stormwater Management Manual for Western <br />Washington." <br />We appreciate the opportunity to provide additional services on this project. Please call if you have any <br />questions or comments. <br />Sincerely, <br />GeoEngineers, Inc. <br />C. �T <br />Bridget A. August,l LG, LHG <br />32807 <br />Hydrogeologist <br />Robert C. Metcalfe, PE, LEG <br />Principal <br />CWM:BAA:RMC:nld <br />Attachments: <br />Figure 1. Site Plan <br />Figures 2 and 3. PIT Results <br />Appendix A. Exploration Logs and Laboratory Testing <br />Figure A-1 - Key to Exploration Logs <br />Figures A-2 and A-3 - Log of PITS <br />Figure A-4 - Sieve Analysis Results <br />1 /22 <br />Disclaimer: Any electronic form, facsi mile or hard copy of the original document (email, text, table, and/orfigure), if provided, and any attachments are only a copy <br />of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. <br />GWENGINEER� <br />File No. 24459-003-00 <br />