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0 <br /> PUBLIC HEALTH SERVICES OPO�IN <br /> SAN JOAQUIN COUNTY r. c <br /> ENVIRONMENTAL HEALTH DIVISION ";f <br /> Karen Furst, M.D., M.P.H., Health Officer c tP <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 4�iFoa' <br /> 209/468-3420 <br /> PHILLIP ELDER/JAY QADDOURA Ct( II � <br /> RAINWATER CARWASH �1�j <br /> 420 W YOSEMITE JUN 2 7 200f <br /> MANTECA CA 95337 <br /> RE: RAINWATER CARWASH SITE CODE: 231458 <br /> 420 W YOSEMITE AVE <br /> MANTECA CA 95337 <br /> WORKPLAN:Interim Remediation Work Plan-June 2001 DATED: June 25.2001 <br /> PREPARED BY: Advanced GeoEnvironmental.Inc.(AGE) <br /> APPROVED(with Conditions See below) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN(H&S 25299.37,subd.(c)(3).): <br /> 1. Installation of a down-well pump and a one-inch diameter Schedule 80 PVC pipe in <br /> extraction well N 1 (EW-1). <br /> 2. Installation of a two-inch diameter Schedule 80 PVC pipe in a 1.5-foot deep trench between <br /> the EW-1 and the groundwater treatment system. <br /> 3. Installation of the groundwater treatment system including two granular activated carbon <br /> (GAC)vessels and two SunSolve vessels,associated piping and electrical conduits, <br /> controllers,and a 1,000-gallon holding tank <br /> 4. Placement of dedicated transducers in EW-I and selected observation wells to obtain <br /> information needed for optimization of the groundwater extraction system. <br /> 5. Implementation of groundwater extraction and treatment system in an effort to control the <br /> contamination groundwater plume and to protect local water supply wells <br /> 6. Daily monitoring of the system during the start-up period(fust two weeks of operation),and <br /> on a weekly basis after that. <br /> COMMENTS AND CONDITIONS: <br /> 1. Double contain the two-inch Schedule 80 PVC pipe from EW-1 to the treatment system to <br /> prevent damage or leakage due to the high vehicular traffic at the site. Increase width and <br /> depth of the trench as necessaryin order to accommodate the additional secondary <br /> containment piping. <br /> 2. Contact PHS/EHD within 24 hours if the system has to be shut down due to repair or <br /> insufficient removal of contamination in groundwater to allow disposal to City of Manteca <br /> sanitary sewer system. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN W 25299.37,subd.(Q(3).): <br /> None if the conditions are met. <br /> DATED314ftc Z�j 200/ BY aCc <br /> Cc: CRWQCB,Central Valley Region-Marty Hartzell <br /> Fax/Cc: Advanced GeoEnviromnental,Inc.—Tun Cuellar <br /> A Division of San Joaquin County Health Care Services <br /> I <br />