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1 <br /> FIELD REPORT <br /> GROUNDWATER MONITORING <br /> SAN JOAQUIN COUNTY HUMAN SERVICES AGENCY BUILDING <br /> STOCKTON, CALIFORNIA <br /> 1 Introduction <br /> ' On June 3 and 4, 1993, ROY F WESTON, INC (WESTON) conducted a sampling program <br /> of five monitoring wells located in the vicinity of the San Joaquin County Human Services <br /> building in downtown Stockton This sampling was conducted in order to evaluate the possible <br /> ' presence of gasoline-related compounds in the groundwater <br /> Water Level Measurement and Monitor Well Purge <br /> ' Prior to starting the well sampling process The contents of the purge water tank, collected from <br /> previous sampling events, was released to the City of Stockton's sewer system Analysis of the <br /> tank contents during previous sampling events were well below the City's criteria <br /> On arrival at the site, measurements of standing water levels and total well depth were taken in <br /> ' wells MW-2 through MW-8 utilizing an electronic well sounding device Wells MW-2 and <br /> MW-3 were dry Groundwater elevations relative to mean sea level (MSL) were calculated and <br /> the results are presented to Table A-1 below <br /> TABLE A-1 <br /> Water Level Elevations <br /> June 3 and 4, 1993 <br /> Well Location Well Elevation` (feet) Depth to Water (feet) Water Elevation'(feet) <br /> 1 MW-1 Abandoned NA3 NA ' <br /> MW-2 Approximately 13 50 Dry NA <br /> MW-3 Approximately 13 50 Dry NA <br /> ' MW-4 13 46 4990 -3644 <br /> MW-5 12 83 4806 -3523 <br /> MW-6 13 17 49 13 -35 96 <br /> ' MW-7 13 14 5088 -3774 <br /> MW-8 13 76 51 33 -3757 <br /> ' 1 Based upon measurements made from top of PVC casing (TOC) <br /> AT_ 2 Elevations in feet relative to mean sea level (MSL) <br /> 3 NA = Not applicable <br /> ' SPK%R"SWC 2ND WP A - 1 07/26/93 <br />