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California Regional Water Quality Control Board w ;. <br /> Central Valley Region <br /> vtlr, h <br /> Steven T.Bu e ,Chair <br /> Winston H.Hickox Gray Davis <br /> Secretary for Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/--rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 25 August 2000 <br /> Mr. Wes Johnson <br /> County of San Joaquin <br /> Department of Public Works <br /> P.O. Box 1810 <br /> Stockton, CA 95201 <br /> REVIEW OFSECOMO QUARTER 2000 MONITORINGREPORT,HARNEYLANE <br /> SANITARYLANDFILL,SANJOAQUINCOUNTY(CASENO.2598) . <br /> Regional Board staff has reviewed the Harney Lane Sanitary Landfill, Second Quarter 2000, <br /> Groundwater and Surface Water Monitoring Report, dated 15 July 1999. <br /> An area of subsidence was reported on the top deck on the landfill during the third quarter of 1999. The <br /> county reported in a letter dated 22 June 2000 that the repairs will be completed by the end of August. <br /> Staff will inspect this area on the next routine inspection to ensure that repairs have been finalized. <br /> The Annual report for 1999 indicated the presence of hexavalent chromium in all monitoring wells at <br /> Harney Lane Sanitary Landfill. A Regional Board staff letter of 25 May 2000 requested the county to <br /> conduct a retest for hexavalent chromium. Your letter of 22 June 2000 indicated that the county did not <br /> conduct the retest because the concentrations detected at Harney Lane Sanitary Landfill are similar to <br /> concentrations reported for North County and Foothill Sanitary Landfills. According to Title 27, an <br /> evaluation of the hexavalent chromium detections is required. Regional Board staff will address this <br /> issue in a separate letter. <br /> The monitoring report also indicates an upward trend for chloride in MW-2. This trend has been present <br /> for several quarters and may be indicative of leachate impacting groundwater. <br /> I have attached a copy of the Monitoring Report Compliance Checklist that will be included in the case <br /> file for Harney Lane Sanitary Landfill. Please note the comments included at the end of the checklist. <br /> If you have any questions or comments regarding my review,please call me at (916) 255-3137. <br /> WENDY W. ARANO <br /> Associate Engineering Geologist <br /> cc.: Robert McClellon, REHS, Public Health Services, Environmental Health Division <br /> California Environmental Protection Agency <br /> Ca Recycled Paper <br />