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7 <br /> 21 November 2003 T <br /> AGE-NC Project No 02-0964 <br /> Page 3 of 4 <br /> (pg/l) In addition,BTEX compounds were detected in sample MW-1 at concentrations ranging from <br /> 29 ug/1 of toluene to 3,100 ug/1 of xylenes <br /> No other target analytes were detected in the samples analyzed Analytical results of the monitoring <br /> well ground water samples are summarized in Tables 2 and 3 The laboratory reports (CTEL 1 D <br /> CT214-0310122), quality assurance and quality control and chain-of-custody forms are presented <br />' in Appendix C <br /> 4.0. CONCLUSIONS <br /> The findings from the October 2003 ground water monitoring event are as follows <br /> • Ground water flow direction at the water table was towards the east to northeast at a gradient <br /> o f 0 01 Rift The ground water elevation at the site has decreased 1 57 feet between Apn1 and <br /> October 2003 <br /> • TPH-g was detected in ground water sample from well MW-1 at a concentration of <br /> 6,300µg/l The BTEX compounds benzene(220 Ag/1),ethylbenzene(1,200µg/1)and xylenes <br /> (3,100 Ag/l) in sample MW-1 were significantly above the DHS's Maximum Contaminant <br /> Levels established for these compounds in drinking water <br /> • The extent of TPH and BTEX compounds has not been defined <br /> 50. RECOMMENDATIONS <br /> Based on the findings of this investigations, AGE recommends <br /> • Continued quarterly monitoring of the site,the next morutonng eventis scheduled for January <br /> 2003 <br /> • Additional assessment of the lateral and vertical extent of hydrocarbon-impacted soil and <br /> ground water in the vicinity of the former Chevron dispensers, and in the City of Stockton <br /> Right of Way east of the site <br /> • Once the impact to soil and ground water impact has been delineated, a work plan should be <br /> prepared for feasibility testing to evaluate various remedial alternatives at the site <br /> I <br />