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AECOM period, during which no comments were received, RWQCB requested destruction of the Site wells (RWQCB 2023a). Pre-mobilization Activities Permits San Joaquin County Environmental Health Department(SJCEHD) maintains jurisdictional authority over well destructions in San Joaquin County.As such, prior to commencing field activities,AECOM will obtain the necessary well destruction permit from SJCEHD. To access the wells located between the road and the sidewalk on South San Jose Street,AECOM will also obtain an Encroachment Permit from the City of Stockton. Figure 2 shows the well locations. Health and Safety Plan A Site-specific Health and Safety Plan (HASP)will be completed to detail health and safety protocols for the well destruction activities at the Site.The HASP will meet the requirements of applicable federal, state, and local regulations. These requirements include: • Title 29, Code of Federal Regulations (CFR) Section 1910.120, • Title 29 CFR Section 1926, and • California Code of Regulations Title 8. The HASP addresses worker and nearby (off-site) personnel safety.All well destruction activity workers must be 40-hour Hazardous Waste Operations and Emergency Response (HAZWOPER)-certified and must be current with the 8-hour annual HAZWOPER refresher course. Utility Clearance AECOM will mark the Site and notify Underground Service Alert of Northern California and Nevada (USA North 811) of the work a minimum of 48 hours in advance.AECOM will also utilize the services of a geophysical locator to identify underground utilities in the vicinity of each well location. Boring Logs and Well Construction Details Construction details for the eight groundwater monitoring wells, and the most recent depth to groundwater measurements, are summarized in Table 1 (AECOM 2022). Well construction detail logs are provided in Attachment A. Implementation Activities Well Destruction Procedures The eight Site groundwater monitoring wells will be destroyed by a licensed C-57 water-well drilling subcontractor by over-drilling in accordance with the standard operating procedures detailed in California Well Standards Bulletins 74-81 (California Department of Water Resources [DWR] 1981)and 74-90 (DWR 1991 and San Joaquin Well Standards (SJCEHD 2005). These standards are included in Attachments B and C. Prior to over-drilling, an AECOM field representative will measure and record the following at each well: 1. Total depth of the well, aecom.com Our Reference 60632236 2/6