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Toyota Town Inc., Stockton - 3 - 19 May 2022 Table 2 — Scope of Work Summary NE= northeast; SE= southeast; BTEX= benzene, toluene, ethylbenzene, total xylenes, LDC= leak detection compound; ft= feet; in= inch; bgs= below ground surface * Discrete sample depths to be determined by observed lithology, with the shallow sample depth to be approximate to the MW -12 screen interval, and the deep sample to be at least 20 feet deeper than the shallow. 5. By 31 August 2022, please submit a Site Assessment Report which details completion of the above discussed scope of work. Please include in this report conclusions and recommendations related to the delineation of the extent of impact to groundwater from the Site release. Please also include an evaluation oI collected soil gas data as compared to Petroleum Vapor Intrusion criteria of the State Water Resources Control Board's Low Threat UST Case Closure Policy (LTCP). Please also include recommendations for the path forward for this case. Groundwater Total Sampling Soil Gas Sampling Type Location Depth Probe Sand QA/QC Depth Analysis Analysis Depth Interval Measures NE of 2 depths TPHg, Ground- MW -10 110 ft between BTEX, water & MW- bgs 60-110 ft MTBE, Boring 12 bgs* TBA NE At least Soil gas BTEX, Shut-in Well 1 corner At At 6 in naph- testing, of slab least least above thalene, quantitative SE 6 ft and Soil gas corner bgs 5.5 ft below oxygen, Bleak well LDC testing of slab probe NE= northeast; SE= southeast; BTEX= benzene, toluene, ethylbenzene, total xylenes, LDC= leak detection compound; ft= feet; in= inch; bgs= below ground surface * Discrete sample depths to be determined by observed lithology, with the shallow sample depth to be approximate to the MW -12 screen interval, and the deep sample to be at least 20 feet deeper than the shallow. 5. By 31 August 2022, please submit a Site Assessment Report which details completion of the above discussed scope of work. Please include in this report conclusions and recommendations related to the delineation of the extent of impact to groundwater from the Site release. Please also include an evaluation oI collected soil gas data as compared to Petroleum Vapor Intrusion criteria of the State Water Resources Control Board's Low Threat UST Case Closure Policy (LTCP). Please also include recommendations for the path forward for this case.