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UV! <br /> N. <br /> COUNTY OF SAN JOAQUIN THOMAS R.FLINN <br /> DEPARTMENT OF PUBLIC WORKS DEPUTY DIRECTOR <br /> R O.BOX 1810-1810 E.HAZELTON AVENUE <br /> c4ticoaeP STOCKTON,CALIFORNIA 95201 THOMAS M.GAU <br /> (209)468-3000 DEPUTY DIRECTOR <br /> MANUEL LOPEZ FAX(209)468-2999 <br /> DIRECTOR <br /> STEVEN WINKLER <br /> DEPUTY DIRECTOR <br /> March 27,2001 <br /> Wendy Arano <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento,California 95827 <br /> SUBJECT: AMENDMENT#1 TO THE REPORT OF WASTE DISCHARGE FOR CORRAL <br /> HOLLOW SANITARY LANDFILL <br /> Dear Ms.Arano: <br /> The San Joaquin County Solid Waste Division is proposing that the installation of a landfill gas collection <br /> and control system be corrective action to reduce the Volatile Organic Compound(VOC)concentrations <br /> detected in monitoring well MW-5. A report was submitted on July 26,2000 that confirms the belief that <br /> landfill gas is influencing the groundwater in the vicinity of MW-5. This report satisfies both the <br /> delineation and evaluation of extent of the release. In order to implement corrective action measures the <br /> Report of Waste Discharge must be updated. This is amendment#1 to that document. <br /> The County proposes that monitoring of the groundwater continue according to the current standard. <br /> Quarterly monitoring will be held and the results will be statistically evaluated. The County proposes that <br /> the new water standard become the drinking water standard for each individual constituent. The <br /> effectiveness of the gas control system will be demonstrated through statistical analysis of the <br /> groundwater. A decreasing trend should become evident thus showing the impact that the system is <br /> having on VOC concentrations. <br /> The County is currently in the process of installing a landfill gas collection and control system at the <br /> Corral Hollow Sanitary Landfill. The system is scheduled to be operational in the middle of April,2001. <br /> Please see the enclosed documents for details on the landfill gas collection and control system,an <br /> application for waste discharge requirements,and the Joint Technical Document checklist. <br /> If you have any questions please call me at(209)468-3066. <br /> Sincerely, <br /> � <br /> MICHAEL KALISH <br /> Associate Engineer <br /> MK:vn <br /> Enclosure <br /> c: Robert McClellon,Public Health Services,Environmental Health Division <br /> LA 64201 <br />