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Qu1N <br /> COUNTY OF SAN JOAQUV <br /> EUGENE DELUCCHt <br /> �; '• •� DEPARTMENT OF PUBLIC WORKS CHIEF DEPUTY DIRECTOR <br /> •, ;'e P.O.BOX 1810—1810 E.HAZELTON AVENUE THOMAS R.FLINN <br /> STOCKTON.CALIFORNIA 95201 DEPUTY DIRECTOR <br /> (209)468-3000 MANUEL LOPEZ <br /> FAX(209)468-2999 DEPUTY DIRECTOR <br /> HENRY M. HIRATA <br /> DIRECTOR <br /> April 26, 1995 <br /> MAY 3 1995 <br /> NTAL <br /> Arnie Inouye ENV' ONMPERMIT/SERVICES HEALTH <br /> California Regional Water <br /> Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, California 95827 <br /> Subject: VADOSE ZONE MONITORING - CONFIRMATION <br /> Dear Mr. Inouye: <br /> This is regarding the vadose zone monitoring results for the <br /> North County Recycling Center and Sanitary Landfill . EMCON <br /> detected some Volatile Organic Compounds (VOC) in three <br /> lysimeters. The County hired an independent third party <br /> (KZeinfelder Inc.) to confirm EMCON's findings, and they found <br /> similar results. <br /> The County hired a contractor to run a camera through the <br /> leachate collection pipes to determine if they were clogged. The <br /> pipes were found to contain some leachate. As a result, the <br /> County is in the process of hiring a contractor to flush the <br /> leachate collection lines. <br /> Once the lines are cleared, the County will continuously pump <br /> leachate to prevent the buildup of head over the liner. The sump <br /> will be continuously monitored and pumped dry as needed. The <br /> leachate will be processed according to our approved leachate <br /> management plan. The County will also continue to monitor the <br /> lysimeters in accordance with Waste Discharge Requirements. If <br /> you have any questions regarding this information, please call me <br /> at (209) 468-3066. <br /> Sincerely, <br /> GABRIEL KARAM, P.E. <br /> Senior Solid Waste Engineer <br /> GK:WJ:vj <br /> R:JVIRGINIAJLETTERSJCONFRMVZ.AI <br /> c: Ed Padilla, Environmental Health Division <br /> LA 63372 <br />