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0 <br /> Geo-Logic <br /> ASSCIATES <br /> Geologists,Hydrogeologists and Engineers <br /> May 3, 2012 <br /> JN 2011-0115 <br /> San Joaquin County Department of Public Works <br /> 1810 E. Hazelton Avenue <br /> Stockton,California 95205 <br /> Attention: Mr.W. Michael Carroll <br /> SUBMITTAL OF WELL MW-9A,MW-10A,and MW-11A COMPLETION REPORT <br /> FOR THE EVALUATION MONITORING PROGRAM AT THE <br /> CORRAL HOLLOW SANITARY LANDFILL,SAN JOAQUIN COUNTY,CALIFORNIA <br /> Geo-Logic Associates is pleased to provide the San Joaquin County Department of Public Works <br /> (County)with the attached Well Completion Report for the Evaluation Monitoring Program <br /> (EMP)at the Corral Hollow Sanitary Landfill (CHSL). This document fulfills a reporting <br /> requirement outlined in an Order to the County from the Central Valley Regional Water Quality <br /> Control Board(RWQCB)staff dated July 7, 2011. <br /> As described in the report,three permanent monitoring wells were drilled and installed as part <br /> of an ongoing EMP at the CHSL. These wells are located around the perimeter of a VOC plume <br /> that extends outward from the CHSL,and can be used as intended to evaluate the nature and <br /> extent of impacts to groundwater. All wells were drilled, logged,constructed,developed,and <br /> sampled by or under the direct supervision of a State of California Certified Engineering <br /> Geologist in accordance with the methods outlined in the approved EMP workplan. Following <br /> development and sampling,water level recovery rates were recorded and subsequent aquifer <br /> parameter analyses were performed. The findings and conclusions from the EMP investigation <br /> will be compiled and presented to the RWQCB under a separate cover,and will be followed by <br /> an Engineering Feasibility Study outlining the County's proposed course of corrective action. <br /> The attached report has been developed based on the data described therein. Our firm should <br /> be notified if conditions are found that differ from those described in this report,since this may <br /> require a re-evaluation of the conclusions and recommendations. If you have any questions <br /> regarding this letter, please call me at(858)451-1136 at your convenience. <br /> Geo-Logic Associates <br /> XhnM. ower,CEG <br /> Supervising Geologist <br /> CC: Steve Sarantopoulos,GLA-Grass Valley <br /> 11415 W. Bernardo Court, Suite 200, San Diego, California 92127 Phone: (858) 451-1136 FAX: (858) 451-1087 <br />