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AdvancedGoilr An Employee -Owned Company 13 June 2023 Project No. 23-7200 Mr. Jeff Wong San Joaquin County Environmental Health Department — Site Mitigation 1868 E. Hazelton Avenue Stockton, CA 95205 Subject: Well Destruction Work Plan DESALVATORE PROPERTY 200 North Beckman Road, Lodi, California Dear Mr. Wong: At the request of Tom Fehr of Stone Valley Investments, AdvancedGeo, Inc. (AGI) has prepared this Well Destruction Work Plan (Work Plan) for the destruction of two (2) groundwater monitoring wells at 200 North Beckman Road, Lodi, California (site). The groundwater monitoring wells are single -completed with 2 -inch diameter well casings in 8 -inch diameter boreholes. Structures, soil borings and well locations are illustrated on the historical site plan that is attached. 1.0. INTRODUCTION Historically, several underground storage tanks (UST) that were removed from the property, along with the general property usage, had impacted the subsurface environment. To mitigate the impacts, soil had been excavated from several excavations to a maximum depth of 27 feet below surface grade (bsg). Residual impacts to the soil existed on the east side of the former tank pit area at depths between 25 and 45 feet bsg. In October 2003, Kleinfelder was contracted by San Joaquin County Mosquito & Vector Control District, to evaluate "current" subsurface soil and groundwater conditions of the subject property. As part of the investigation, a total of four wells were installed on the subject property and were monitored to evaluate site conditions. Review of the historical data indicates that groundwater flows to the southwest. Additionally, only minor soil impact has been detected in a deep boring advanced on the eastern side of former UST area and in former perimeter well MW -4. The cause for impact in MW -4 was connected to the former fueling facility located in the area of the well. 837 Shaw Road • Stockton, CA 95215 Telephone (800) 511-9300 • Fax (888) 445-8786