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G E M Phase II ESA Work Plan March 19,2019 The soil gas samples will be analyzed for volatile organic compounds (VOCs) using U.S. Environmental Protection Agency(U.S. EPA) Method TO-15. The soil samples will be analyzed for the following: • Total petroleum hydrocarbons (TPH) quantified as diesel (TPHd) and TPH quantified as motor oil (TPHmo) using U.S. EPA Method SW8015B (extractable); • TPH quantified as gasoline (TPHg) using U.S. EPA Method SW801513 (purgeable); • Volatile organic compounds (VOCs) using U.S. EPA Method 5035 collection method for analysis via SW846 Method 826013; and • Five California Leaking Underground Fuel Tank (LUFT) manual "wear" metals (cadmium, chromium, lead, nickel,zinc) using U.S. EPA Method 60108. If additional samples are collected based on elevated PID readings and/or evidence of chemical staining, the samples will be submitted to the project laboratory on a "Hold" basis pending approval from the client to analyze the samples. Report The Phase II ESA results will be presented in a report of findings which will present a summary of the procedures and results for this investigation, figures showing sampling locations, and tables presenting analytical results compared to published screening levels. Copies of the analytical laboratory report will be included in an appendix. Schedule Work for the Phase II ESA will begin immediately upon receipt of an approved permit from SJCEHD and scheduling of a SJCEHD inspector. An electronic version of the final report will be provided within 2 weeks from receipt of the final analytical laboratory data reports. Closing If you have questions regarding this work plan, please contact the undersigned at (916) 677-9897 or [freeman@green-em.com. Sincerely, Green Environmental Management Lita D. Freeman, P.G. Professional Geologist Page 4 of 4