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POUIN <br /> THOMAS R. FLINN P.O.BOX 1810-1810 E.HAZELTON AVENUE <br /> STOCKTON,CALIFORNIA 95201 <br /> DIRECTOR (209)468-3000 FAX(209)468-2999 <br /> www.co.san-joaquin.ca.us <br /> THOMAS M.GAU <br /> DEPUTY DIRECTOR <br /> MANUEL SOLORIO Wcrlemg for YOU <br /> DEPUTY DIRECTOR <br /> STEVEN WINKLER <br /> DEPUTY DIRECTOR RM <br /> BENTON ANGOVE <br /> 2003 <br /> BUSINESS ADMINISTRATOR APR 0 8 <br /> April 7, 2003 ENVIRORMENT HEA1JH <br /> PERMIT/SERVICES <br /> Ms.Kim Schwab <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, California 95827 <br /> SUBJECT: HARNEY LANE SANITARY LANDFILL GROUNDWATER AND SURFACE <br /> WATER MONITORING <br /> Dear Ms. Schwab: <br /> Enclosed is a copy of the Fourth Quarter and Annual 2002 Monitoring Report for the Harney Lane <br /> Sanitary Landfill. This report was prepared to comply with current Waste Discharge Requirements <br /> Order No. 96-139. <br /> All concentrations of quarterly monitoring and field parameters are below established concentration <br /> limits except for pH in MW-1 and Electrical Conductivity (EC)in MW-3. At both wells, no other <br /> monitoring or field parameters indicate of impact and VOCs to groundwater. Therefore,the County does <br /> not believe the groundwater in the vicinity of these wells(MW-1 and MW-3)has been impacted by a <br /> release from the landfill. The County will monitor the levels of pH in MW-1 and EC in MW-3 closely to <br /> ensure groundwater quality is not compromised. <br /> Several Volatile Organic Compounds(VOCs)were detected in groundwater samples collected from <br /> MW-2. Well MW-2 is an impacted well. Groundwater quality in the vicinity of MW-2 is evaluated <br /> based on the presence/absence of statistically significant trends. Analytical results show no statistically <br /> increasing trend in any monitoring and field parameters,meeting the Water Quality Protection Standards. <br /> The County expects to see a continuous improvement of groundwater quality in the vicinity of MW-2. <br /> If you have any questions,please call me at(209)468-3066. <br /> Sincerely, <br /> W. MICHAEL CARROLL,PE <br /> Senior Civil Engineer <br /> MC:sc <br /> NAI Hamey Lane\Groundwater Monitoring\Repts2002\4thQtrO2letter.wpd <br /> Enclosure <br /> C: Robert McClellon,Environmental Health Department <br /> LA 11870 <br />