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Chevron - 2 - 4 October 2019 Alden Park Tracy, San Joaquin County Each well will be backfilled with neat cement grout and 25 pounds- per- square- inch of pressure will be applied to the well casing. The grout will be allowed to settle for approximately 10 minutes. Following the initial pressure test, additional volumes of grout will be pumped into the well casing to bring the grout level back to the top of the well casing, and additional pressure tests will be applied accordingly. After the pressure grouting, the well surface completions will be removed, and the upper 3-feet of material will be excavated. Neat-cement will be placed in the well casing and allowed to overflow into the excavation forming a mushroom cap. The remainder of the excavation will be backfilled to match the surrounding material and grade. Waste material from subsurface sources generated during well destruction activities will be placed in California Department of Transportation approved 55-gallon drums. The drums will be labeled and temporarily stored on-Site pending characterization for disposal at an appropriate facility. A summary report describing the well abandonment will be submitted to the Central Valley Water Board following the completion of field activities. Staff Comments Staff concurs with the scope of work described in the Work Plan. All materials and procedures used during the destruction of wells MW-11, MW-12, and MW-14 need to conform with the standards under Water Wells and Monitoring Wells in the California Well Standards Bulletin 74-90 (June 1991) and Bulletin 74-81 (December 1981), adopted by the Department of Water Resources, and in accordance with the Work Plan, By 31 December 2019 please submit a well destruction report to include grout volumes emplaced in each destroyed well reported in a table. Copies of the Well Completion Forms need to be filed with the California Department of Water Resources and included in the report.