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ASSOCIATES I N C . <br /> For protection of the seal at the land surface, a hole at least two feet in diameter will be excavated <br /> around the outside of each well casing to a depth of approximately two feet below ground <br /> surface. The sealing material used to seal the well will be allowed to spill over into the <br /> excavation. <br /> After the sealing material has set in well MW1, the excavation will be filled to within <br /> approximately 3 inches of surface grade with an aggregate material and the remaining 3 inches <br /> will be filled with asphalt patch or soil to restore the site's appearance. <br /> Based upon well construction details and assuming the filter pack for each well has an estimated <br /> porosity of 25% (Heath, R. C., 1983), an estimated volume of approximately 23 gallons of grout <br /> will be used to abandon well MW 1. Monitoring well construction data, soil boring logs, and <br /> gout volume calculations are attached. One permit application and associated fees (check no. 867) <br /> are attached. The application is for the single on-site monitoring well MWl. <br /> Report Preparation <br /> Upon completion of the well destruction activities, a summary report will be prepared for <br /> submittal to San Joaquin County Environmental Health Department (SJCEHD). The report will <br /> include a description of all field activities. <br /> All work described in this workplan will be performed under the direction of a California <br /> Registered Professional Engineer. All work will be performed in accordance with ATC's Site <br /> Safety Plan and Quality Control/Quality Assurance Plan for this site, on file at SJCEHD. <br /> Proiected Schedule <br /> ATC has tentatively scheduled field activities for February 9, 2004 because the school is not in <br /> session that day. Once approval of this workplan has been received, ATC will confirm the <br /> schedule for drilling activities. ATC will notify SJCEHD at least 48 hours prior to beginning any <br /> field activities. The summary report will be submitted to SJCEHD approximately two weeks after <br /> the completion of field activities. <br /> W:\17292.0001\wl-wellabandownent.doc 2 <br />