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7� <br /> 1117 Lane Palm Suite B <br /> Modesto California 95351 <br /> �. www atc-enviro com <br /> 209 579 2221 <br /> Ll I Fax 209 579 2225 <br /> A S S O C I A T E S I N C <br /> December 17, 2001 o O D U <br /> 17292 0001 <br /> �o <br /> DEC�. 92001 <br /> Mr Jeff Wong ENVIRONMENTAL HEALTH <br /> San Joaquin County Public Health Services Q PERMIT/SERVICES <br /> Environmental Health Division <br /> 304 E Weber Street, Third Floor <br /> Stockton, California 95202 <br /> Subject Fourth Qu r 2001 oundwater Monitoring Report, Franklin High School, 300 <br /> North Gertru e, Stockton, California <br /> Dear Mr Wong <br /> ATC Associates Inc , on behalf of the Stockton Unified School District, has prepared this letter to <br /> serve as a Fourth Quarter 2001 Monitoring report for the subject site (Figure 1) <br /> INTRODUCTION <br /> peATC's activities during the Fourth Quarter of 2001 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 November 21, 2001 ATC personnel conducted quarterly monitoring and sampling at the <br /> above referenced site The well was monitored, purged, and sampled in accordance with ATC's <br /> Site Safety Plan and Quahty Assurance/Quality Control Plan (QA/QC Plan) submitted to Sari <br /> Joaquin County Public Health Services/Environmental H,-altli Department (PHS/E D) on <br /> February 1, 1999 <br /> The groundwater level in the monitoring well was 60 54 feet below grade, indicating a decrease in <br /> the water table of 4 53 feet since water depth was last measured :n November 2000 The <br /> groundwater monitoring data are summarized in Table 1 <br /> Monitoring well MW 1 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 they, labeled with <br /> w 117292 00011reportsl4 qmr 2001 doc 1 <br />