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10/24%2003 10: 22 2094645059 MARLEY CT STOCKTON PAGE 02 <br /> OCT-15-2003 1508 9 0 P,0"2 <br /> Department of Toxic Substances Control <br /> Edwin F. Lowry, Director <br /> 8800 Cal Center Drive <br /> Sacramento, Califomia 95826-3200 <br /> Winston H. Hickox Gray Davis <br /> Agency Secretary Governor <br /> California Environmental <br /> Protection Agency <br /> October 15, 2003 Post-V brand lax transmittal memo 7671 •erpsgee <br /> Th r <br /> r e,a te•h <br /> Mr. David R. Lieb <br /> Environmental Coordinator25 <br /> Marley Cooling Technologios, Inc. ioN _ u_ 5 9r N <br /> 200 North Wagner Avenue <br /> Stockton, California 95316 <br /> REQUEST FOR AN AMEADMENT TO THE REMEDIAL WELL FIELD EXTRACTION <br /> PLAN, FINAL REMEDIAL ACTION PLAN MARLEY COOLING TECHNOLOGIES <br /> Dear Mr. Lieb: <br /> The Department of Toxic Substances Control (DTSC) has completed review of the letter <br /> prepared by Dudek R Associates on behalf of SPX and Marley Cooling Technologies <br /> requesting amendment to the Remedial Well Field Extraction Plan, submitted on <br /> July 2, 2003. Our comments regarding technical considerations follow. <br /> 1. We concur with a strategy which reduces or eliminates extraction from wells that <br /> have clearly achieved cleanup objectives identified In the Remedial Action Plan <br /> (RAP) and applies the resulting treatment capacity to areas of the plume closer to <br /> the source of contamination that exceed these objectives. However, well 1-5 <br /> continues to show significantly higher levels of dissolved chromium (35 pgll) than <br /> adjacent extraction and monitoring wells. Accordingly, we will require that this well <br /> continue to be pumped In order to insure that the RAP objectives of reducing <br /> chromium in the aquifer to health protective levels and levels consistent with <br /> beneficial use are attained. Toward that end, DTSC will require continued operation <br /> of well 1-5 for a minimum of four additional quarters at which time monitoring results <br /> will be re-evaluated, <br /> 2. Further, in wells where groundwater extraction is being discontinued (1-2, 1-3. 1-4, <br /> and 1-6), pumps shall be maintained in operational condition during this period. <br /> 3. As groundwater extraction from some areas of the shallow zone has been <br /> discontinued for quite some time, addltional optimization efforts should evaluate <br /> resuming extraction from the shallow zone especially in the source area. <br /> The energy eha/lengo racing coftmia is maL Every cadiemian needs to take immediate ectlen to raduce energy consumption, <br /> For a list of sowie ways you can mdoae demand and out your energy costs,Roe our web ette at www.dtac.c&gay. <br /> ® Printed on Recycled Paper <br />