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UWI <br /> cow COUNTY OF SAN JOA UI THI <br /> DEPARTMENT OF PUBLIC WORKS DI <br /> P.O.BOX 1810-1810 E.HAZELTON AVENUE STE <br /> STOCKTON,CALIFORNIA 95201-1810 D1 <br /> 209/468-3000 <br /> FAX:209/468-2999 <br /> MANUEL LOPEZ <br /> DIRECTOR t <br /> April 12, 2000 APR 149900 <br /> Wendy Arano ENViRONMEN ,rL- riEALI <br /> California Regional Water Quality Control Board PERMIT/SERVICES <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, California 95827 <br /> SUBJECT: CORRAL HOLLOW SANITARY LANDFILL MONITORING <br /> Dear Ms. Arano: <br /> Enclosed is a copy of the First Quarter(2000)Monitoring Report for the Corral Hollow Sanita <br /> Landfill. Results from the first quarter show statistical trends in several parameters, which are <br /> described in the enclosed report. As described in previous correspondence, the County believe: <br /> that groundwater concerns are related to landfill gas migration. A landfill gas control system is <br /> scheduled to be installed in September-October 2000. Further monitoring will determine the <br /> effectiveness of the gas control system. <br /> Surface water samples were taken and the five year CDCs analyzed. Analysis of the data show <br /> an exceedence of pH in the surface water. <br /> This report was prepared to comply with Waste Discharge Requirements Order No. 94-259. <br /> If you have any questions, please call me at (209) 468-3066. <br /> Sincerely, <br /> WES OHNSON <br /> Associate Civil Engineer <br /> WJ:MK:rh <br /> N:\,Michael\CFLGWmon\lstOOlet.wpd <br /> Enclosure <br /> c: Robert McClellon, Lead Senior R.E.H.S., Public Health Services, Environmental Heal <br /> Division <br /> LA 64201 <br />