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1117 Lone Palm, Suite B.... _ <br /> Q Modesto, California 95351 <br /> www.atc-enviro.com <br /> 209.579.2221 <br /> Fax 209.579.2225 <br /> A S S O C I A T E S I N C LI LlECEN D <br /> JAN 2 3 2002 <br /> January 22, 2002 ENVIRONMENT HE=ALTH <br /> 17292.00a2 <br /> PERMIT/SERVICES <br /> Mr. Jeff Wong <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 E. Weber Street, Third Floor <br /> Stockton, California 95202 <br /> Subject: Fourth Quarter 2001 Groundwater Monitoring Report, Stagg High School, 1621 <br /> Brookside Road, Stockton, California <br /> Dear Mr. Wong: <br /> I <br /> I <br /> ATC Associates Inc., on behalf of the Stockton Unified School District, has prepared this letter j <br /> M to serve as a Fourth Quarter 2001 Monitoring report for the subject site (Figures I and 2). <br /> INTRODUCTION <br /> ATC's activities during the Fourth Quarter of 2001 included monitoring water levels and <br /> collecting groundwater samples from on-site monitoring wells MW1, MW2, MW3, MW4, and <br /> MW5, analyzing the collected groundwater samples for petroleum hydrocarbon constituents, and, <br /> preparation of this quarterly report. The location of the wells are shown on Figure 2. <br /> GROUNDWATER MONITORING <br /> Groundwater Monitoring and Sampling <br /> On December 20, 2001, ATC personnel conducted quarterly monitoring and sampling at the <br /> above referenced site. The wells were monitored, purged, and sampled in accordance with <br /> ATC's Workplan Addendum for Supplemental Subsurface Investigation at Stagg High School, <br /> 1621 Brookside Road, Stockton California, dated December 7, 2000 and'ATC's Site Safety Plan <br /> submitted to PHS/EHD on July 1, 1999. <br /> Water level measurements were collected from wells MW1, MW2, MW3, MW4, and MW5 on <br /> December 20, 2001. The groundwater levels ranged in elevation from a high of—5.62 feet at <br />;., MW4 to a low of—5.76 feet at MW5. The site's underlying groundwater direction of flow was <br /> wAwordpro117292.00021reportsl4 ymr 2001.doc <br />