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1 <br /> Cealogic, t 7-echa ics l'tc. <br /> 1 1141 7th Street <br /> Modesto,California 95354 <br /> ' (249)522-4119/Fax(209)5224227 <br /> ' SITE CHARACTERIZATION <br /> REPORT <br /> Monitoring Well Installation <br /> & <br /> Groundwater Monitoring <br /> ' Sinclair Trucking <br /> 3780 West Linne Road <br /> ' Tracy, California <br /> Project No. 1030.2 <br /> June 18, 2002 <br /> EXECUTIVE SUMMARY <br /> ' This report summarizes the monitoring well installation, GPS survey and 2"d Quarter 2002 <br /> groundwater monitoring work that took place at 3780 West Linne Road, Tracy, California, <br /> during April, May and June of 2002. <br /> tOne new deep monitoring well (MW-101) was installed April 2002. Drill cutting <br /> samples were collected during drilling and subsurface geology was logged on site. Core <br /> ' samples were collected and sent to Sherwood Labs Corporation for analysis. The <br /> subsurface is comprised of alternating layers of sand and clay from the surface down to 35 <br /> ' feet below ground surface(bgs). <br /> Laboratory analysis of the groundwater samples collected during the monitoring event show <br /> ' that three of the five wells are non-detect for BTEX, TPH-gas, MTBE, ETBE, TAME, <br /> -DIPS, TBA, 1,2-DCA, and EDB. MW-I has significant concentrations of BTEX and TPH- <br /> G. MW-4 has trace amounts of some BTEX constituents. <br /> ' On April 29, 2002, GTI and Thompson-Hysell Engineers personnel mobilized to the site to <br /> survey the tops of the monitoring wells in accordance to AB2886. The measurements were <br /> used to calculate groundwater elevation,bearing and slope (Table 1). <br />