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1117 Lone Palm Ave , Suite B <br /> V <br /> A, ,,�� Modesto, California 95351 <br /> www atc-enviro com <br /> 209 579 2221 <br /> Fax 209 579 2225 <br /> A g g O G 1 A T E S I N C <br /> 1 <br /> July 31, 2002 u� Zpo2 <br /> 17292 0001 <br /> Mr Jeff Wong ENv ERMSE�V��ES <br /> San Joaquin County Public Health Services P <br /> Environmental Health Division <br /> 304 E Weber Street, Tlurd Floor <br /> Stockton, California 95202 <br /> Subject Second Quarter 2002 Groundwater Monitonng Report, Franklin High School, 300 <br /> North Gertrude Avenue, Stockton, California <br /> Dear Mr Wong <br /> ATC Associates Inc , on behalf of the Stockton Unified School Distnct, has prepared this letter to <br /> serve as a Second Quarter 2002 Monitoring report for the subject site (Figure 1) <br /> INTRODUCTION <br /> ATC's activities during the Second Quarter of 2002 included monitoring the water level and <br /> collecting a groundwater sample from on-site monitoring well MW-1, analyzing the collected <br /> groundwater sample for petroleum hydrocarbon constituents, and preparation of this quarterly <br /> report <br /> GROUNDWATER MONITORING <br /> Groundwater Monitoring and Sampling <br /> On May 30, 2002 ATC personnel conducted quarterly monitoring and sampling at the above <br /> referenced site The well was monitored, purged, and sampled in accordance with ATC's Site <br /> Safety Plan and Quality Assurance/Quality Control Plan (QA/QC Plan) submitted to San Joaquin <br /> County Public Health Services/Environmental Health Department (PHS/EHD) on February 1, <br /> 1999 <br /> The groundwater level in the monitoring well was 59 98 feet below grade, indicating an increase <br /> in the water table of 0 56 feet since water depth was last measured in November 2001 The <br /> groundwater monitoring data are summarized in Table 1 <br /> Monitoring well MW1 was purged a minimum of three well volumes and until the stabilization of <br /> electric conductivity, pH, and temperature was observed Subsequent to purging, groundwater <br /> was sampled and transferred to appropriate sample containers, using a clean, disposable bailer <br /> with a bottom-emptying device to reduce volatilization Sample containers were then labeled with <br /> w\17292 0001VepotU\2 qmr 2002 doe 1 <br /> ENVIRONMENTAL, GEOTECHNICAL AND MATERIALS PROFESSIONALS <br />