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Work Plan for Destruction of <br /> Monitoring and Remediation Wells <br /> Larry's Auto—308 N.Grant St,Stockton CA <br /> Page 3 <br /> Table 1: Well Construction Details—Explosive Wells 011�% lKq <br /> JSJa <br /> Boring Casing Total Sand Pack Depth stimated Neat t�M <br /> Well ID Diameter Diameter Depth Interval Cement <br /> inches inches feet (feet below surface (gallons) <br /> MW-1 8 2 75 53—75 20.8 '� <br /> MW-2 8 2 74 51—74 20.5 <br /> -4 8 2 70 41—70 19.4 84 <br /> 8 2 121 109—121 33.6 0 <br /> MW-9 8 2 120 108—120 33.2 i/ <br /> VW-2 8 2 55 44—54 15.3 <br /> 25—40 <br /> VW-3 8 2 55 35—55 15.3 <br /> VW-4 8 2 55 33-53 15.3 Vol, <br /> 45-55 <br /> 00 VW-5 10 2 55 26-41 19.6 <br /> J 13—23 <br /> ,VW-6 8 2 36 10-35 10.0 s <br /> JVW=7 8 2 36 10-35 10.0 9 <br /> J ,VW-8 8 2 36 20-35 10.0 <br /> _V -9 8 2 36 10-35 10.0 <br /> JAS-i 8 2 63 59—63 17.5 <br /> fi IAS-3 8 2 50 42—50 13.9 ° <br /> EW-1 10 4 50 29—50 19.3 ✓ <br /> EW-2 10 4 73 57—73 28.2 <br /> 7.2 PRESSURE GROUTING ord rzy(ed <br /> Due to logistical issues, six�6) wells will be abandoned in place by pressure grouting. The grout will be P� <br /> placed in one continuous operation if possible using a tremie pipe. The well box and soil from around the <br /> well casing will be removed to attach a pressure fitting,followed by pressuring the casing at approximately <br /> 20 pounds per square inch(psi)for a minimum of 5 minutes to ensure maximum displacement of grout into <br /> the sand pack.The vo lume o ne semen injected will be recorded for each well and additional grout slurry <br /> will be added to the well casings as needed.Following the grouting procedure,each well will be over drilled <br /> to approximately five feet bgs and the PVC casing will be destroyed.Additional grout slurry will be placed <br /> into the over drilled borings to within 0.5 to 1.0 foot bgs and the existing surface conditions will be restored. <br /> A summary of the monitoring and remediation wells that are subject to destruction by pressure grouting <br /> and their construction details are included in Table 2,below. <br /> The inert waste generated during well destruction(well casing,metal well boxes,concrete)will be disposed <br /> of in a dumpster/Class III landfill.Any soil generated or groundwater displaced from wells will be collected, <br /> contained in a Department of Transportation(DOT)-approved container(55-gallon drums or steel roll-off <br /> bin),sealed, labeled,and characterized for disposal. <br /> �ia CONDO <br />