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been reported for the site, the risk of a release increases over time as these systems age. Based on the age of the USTs (over 30 years), the proximity up-gradient, and the planned redevelopment of the subject property, this adjoining fueling station is considered a REC. Based on available information from the State Water Resources Control Board (SWRCB) GeoTracker database for the Leaking Underground Storage Tank (LUST) Cleanup Site (facility identification number T0607700597) located 0.5 mile to the south-southwest of the subject property, the first groundwater bearing zone is anticipated to be encountered between 10 and 12 feet below ground surface (bgs) with a flow direction to the west.The subsurface is expected to consist of sand, silt, and/or clay to at least 20 feet bgs. Objective The objectives of the project will be to evaluate the potential impact of petroleum hydrocarbons and/or volatile organic compounds (VOCs) to soil gas, soil, and/or groundwater as a consequence of a release or releases from the adjoining gasoline station as well as document subsurface conditions and potential risks for the future construction of a car wash facility. Partner will conduct a Geotechnical and Phase II Subsurface Investigation. The investigation scope will include the advancement of six geotechnical borings, four environmental borings, and five soil gas to facilitate the collection and analysis of soil gas, soil, and/or groundwater samples. Additionally, two percolation borings will be advanced to conduct infiltration testing. Refer to the attached proposed sample location map for boring locations. Scope Sampling procedures will generally conform to the requirements of the San Joaquin County Environmental Health Department (SJCEHD), the SWRCB, the Department of Toxic Substances Control (DTSC), and the United States Environmental Protection Agency (EPA). A state-certified laboratory will analyze the samples and the project will be performed under the responsible charge of a qualified Partner representative. Laboratory results will be compared with the San Francisco Bay San Francisco Bay Regional Water Quality Control Board (RWQCB) Environmental Screening Levels (ESLs). Partner will perform the following tasks for the Geotechnical and Phase II Subsurface Investigation: • Prepare a site-specific health and safety plan; • Notify Underground Service Alert (USA) a minimum of two business days prior to drilling activities to clear public utilities; • Secure the necessary drilling permit from the SJCEHD. Permit acquisition will involve submitting a completed application and site plan to the SJCEHD for review and approval and remitting the necessary fees.The turnaround time of the SJCEHD to issue the permit is expected to be no more than two weeks; • Notify the applicable regulatory agencies a minimum of 48 hours prior to drilling/backfilling activities; • Clear the boreholes of utility lines through a geophysical survey. Boring placement will be modified as necessary based on the geophysical survey results to avoid damaging underground features. Additionally, to the extent practical based on subsurface lithology, clear boring location using hand tools; Page 2 PARTNER