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THOMAS R. FLINN P.O.BOX 1810-1810 E.HAZELTON AVENUE <br /> DIRECTOR STOCKTON,CALIFORNIA 95201-3018 <br /> (209)468-3000 FAX(209)468-2999 <br /> c4t,g6'lii www.co.san-joaquin.ca.us <br /> THOMAS M.GAU try <br /> DEPUTY DIRECTOR <br /> MANUEL SOLORIO Worldng for YOU <br /> DEPUTY DIRECTOR <br /> STEVEN WINKLER <br /> DEPUTY DIRECTOR April 16, 2004 <br /> BENTON ANGOVE <br /> BUSINESS ADMINISTRATOR <br /> Ms. Kim Schwab <br /> California Regional Water Quality Control Board <br /> 11020 Sun Center Drive, #200 <br /> Rancho Cordova, California 95670-6114 <br /> SUBJECT: CORRAL HOLLOW SANITARY LANDFILL GROUNDWATER <br /> AND SURFACE WATER MONITORING,FIRST QUARTER 2004 <br /> Dear Ms.Schwab: <br /> Enclosed is a copy of the First Quarter 2004 Monitoring Report for the Corral Hollow Sanitary Landfill, <br /> due April 30, 2004. This report is submitted in compliance with Waste Discharge Requirements, <br /> Order No. 5-01-176. There were no exceedences of concentration limits this quarter. <br /> Six VOCs were reported this quarter at MW-5,which continues a 3-year downward trend in the number <br /> of VOCs reported. <br /> We are pleased to report that the pH at deep aquifer monitoring well MW-6 is now within the expected <br /> range. One VOC (Toluene)was reported this quarter at this well. Since the concentration is a trace <br /> amount,the well was not re-sampled. <br /> Per your request,we calculated the latest concentration limits where no trends are seen(Table 1, Shallow <br /> Aquifer Monitoring). Where trends are seen(at the impacted well MW-5),we show concentration limits <br /> based on historical data prior to a detected trend. <br /> Progress of corrective action is included in Appendix I. <br /> If you have any questions,please call me at(209)468-3066. <br /> Sincerely, <br /> W. MICHAEL <br /> CARROLL,PE <br /> Senior Civil Engineer <br /> WMC.sc <br /> NAICorrall Hollow\Groundwater Monitoring\Repts2004\lstQtrO4letter,doc <br /> Enclosure <br /> c: Robert McClellon,Environmental Health Department <br /> LA 21850 <br />