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5 <br /> Workplan for Destruction of Groundwater Monitoring Wells <br /> Eggiman Hydaulic Garage <br /> Stockton,California 95205 <br /> July 29,2013 <br /> A specialized pressure-grouting tool will be affixed to the well casing to deliver and emplace a neat cement grout <br /> slurry under pressure into the well. The slurry will be pumped under pressure into the remaining casing until the <br /> slurry is injected into the sand filter pack and fills the remaining casing. Once grout extends to the top of the well <br /> casing, air pressure of 25 PSI will be applied to the well casing for approximately five minutes. Additional grout will <br /> be poured into the top of the well casing as necessary. MW11 will be deemed successfully destroyed when a <br /> pressure of 25 PSI can be maintained for five minutes with the grout dropping less than one foot. Following the <br /> pressure procedure, additional grout will be made to overflow into the excavation and form a minimum 24-inch <br /> diameter"mushroom cap" like seal, with at least 12 inches of neat cement grout poured 6 inches above and 6 <br /> inches below the top of the cut-off casing. Any remaining soil voids will be backfilled compacted and resurfaced to <br /> match the surrounding surface completion. <br /> Report Preparation <br /> Upon completion of the well destruction activities, a summary report will be prepared that will include a description <br /> of the well destruction field activities and will include records of waste disposal. Cardno ATC will also submit well <br /> destruction logs to the Department of Water Resources. <br /> PROJECTED SCHEDULE <br /> Once approval of this workplan has been received, Cardno ATC will submit a well destruction permit and <br /> accompanied with the associated fees to the EHD. <br /> Once approved, Cardno ATC will confirm the schedule for drilling activities with EHD and will notify the EHD at <br /> least 48 hours prior to the commencement of any field activities. A summary report will be submitted within <br /> approximately 30 days following the completion of field activities. <br /> If you have any questions or require additional information regarding this workplan, please contact us at(209) 579- <br /> 2221. <br /> �p14AL GF <br /> Respectfully submitted, <br /> �° �N <br /> a TODD fw HAFNER ,a <br /> Mike Sonke Todd Hafner, P.G. <br /> Project Manager CA Professional Geologist No. 8090 NO.am <br /> for Cardno ATC for Cardno ATC <br /> Direct Line +1 209 579 2221 Direct Line +1 209 579 2221 <br /> Email: mike.sonke@cardno.com Email: todd.hafner(a�cardno.com TF OF CAL�FOQ <br /> cc: Andrew Eggiman c/o Robert Eggiman PO Box 580 Mountain Ranch, CA 95246 <br /> James Barton, CVRWQCB <br /> enclosures: Figure 1 Site Location Map <br /> Figure 2 Vicinity Map <br /> Figure 3 Site Map <br /> Attachment 1 Well Construction Details and Determination of Destruction Method <br /> www.cardnoatc.com <br />