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STATE OF CALIFORNIA ON PETE WILSON, Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD, SUITE A <br /> SACRAMENTO, CA 95827-3098 <br /> PHONE: (916) 361-5600 <br /> FAX: (916) 361-5686 <br /> 13 June 1991 <br /> DI <br /> JUN 1 7 1991 <br /> Mr. Stephen ChenENVIPONMENTAL HEALTH <br /> Department of Public Works f- VI <br /> I-r I'C -r <br /> IV <br /> I L <br /> City Hall <br /> 425 N. El Dorado Street <br /> Stockton, CA 95202-1997 <br /> FIRST QUARTERLY MONITORING REPORT 1991, AUSTIN ROAD LANDFILL, STOCKTON, SAN <br /> JOAQUIN COUNTY CASE #2148 <br /> Your contour map shows flow in a westerly direction while the text describes <br /> groundwater flow in a north easterly direction. Also, the groundwater <br /> contamination plume is directed to the northeast. We suggest that you recheck <br /> or resurvey well elevations and water level elevations to determine if <br /> groundwater flow is in the westerly direction. Groundwater pumping patterns <br /> are also a possible cause of this apparent change in groundwater flow <br /> directions. We suggest that you review local pumping patterns. Is it <br /> possible that MW-1 is affected by nearby well extractions.? <br /> If the groundwater flow direction is to the west, this may affect groundwater <br /> investigation and cleanup activities. Please let me know what you determine. <br /> ERT EVANS <br /> Area Engineer <br /> RAE:dlc <br /> cc: Ms. Janet Paige, California Integrated Waste Management Board, Sacramento <br /> Mr. Ed Padilla, San Joaquin County, Public Health Services, Stockton <br /> Mr. J. C. Isham, EMCON, Sacramento <br />