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1 Proposal for of Site Cleanup Confirmation May 5, 1992 Southland, 7-Eleven No 20680, 9110 Thornton Road, Stockton, CA 9 ' Similarly, the reporting frequency for the site would be reduced to a semi-annual basis to be consistent with the sampling and monitonng frequency Groundwater samples will continue to be analyzed for BTEX and TPH-as-gasoline using EPA Method 8015/8020 3.3 Domestic Well Sampling Frequency �"e tAmpting of the domestic wells will continue on a monthly basis until Southland requests a I1��eductI6n jGroundwater samples will continue to be analyzed for BTEX and TPH-as-gasoline using EPA Method 8015/8020 I3.4 Well Abandonment 'Qf_tfie soil sampling results confirm that the source area sails have been rgmediated, the ,GrWndwafei Technology proposes to abandon all monitoring and pumping wells that are dry, and ,all vaporeRttaction points 7his includes the fallowing wails and vapor points MW-2, MW-3, MW-4, MW-5, MW-8, MW-9, MW-10, PW-2, and VP-1 through VP-4 Wells MW-11 and MW-14 would also be abandoned, because they are not accessible due to property owner issues Well MW-12 would be abandoned because there is a pump stuck in the well casing, which impedes data collection IThe designated wells would be abandoned in compliance with the requirements of SJPH Each well will be pressure-grouted from the well bottom to surface grade with a neat cement grout consisting of one bag of cement per every 5 to 10 gallons of water Monitoring well MW-12 will be destroyed by removing the casing and well screen, and drilling out the well seal and filter pack using a drill rig Iequipped with hallow-stem augers The boring will then be sealed using a neat-cement and bentonite grout 35 Report Submittal and Closure Request I After the work has been completed, a report will be prepared presenting the following I ■ Description of work performed, ■ Presentation of the results in text and table form, —�_ GROUNDWATER TECHNOLOGY, INC I