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8203 Hwy 26, Stockton <br /> Page 2 <br /> analytical 'consideration should start at this depth. Selection of soil samples to be <br /> analyzed should be based on field observations.and a sufficient number of <br /> samples should be analyzed to provide lateral and vertical definition in all <br /> directions from the former tank area. <br /> Please be advised that EHD is required to meet the California Well Standards <br /> Bulletin 74-90 well grout specification of mixing 1-94 pound bag of Portland i <br /> cement with each 5 to 6 gallons of water. Although, the county well standards <br /> state that up to 10 gallons of water can be mixed with each 94 pound bag of <br /> Portland cement, this is no longer approved. <br /> Collection and analysis of water samples from the on-site drinking water well <br /> should be included in the quarterly monitoring events for this site until the well is <br /> destroyed. <br /> r <br /> An addendum to the work plan that incorporates.the above comments and a new <br /> proposed site map should be submitted to EHD by October 2, 2002. <br /> r <br /> If you have any questions contact me at (209) 468-3449. <br /> Donna Heran, RENS, Director <br /> Environmental Health Department { <br /> I <br /> Margaret Lagorio, Supervising REHS <br /> Unit IV I <br /> c: AGE — Bill Little <br /> CVRWQCB — Marty Hartzell <br /> r,. <br /> l <br />