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Working To Restore Nature <br /> rdedicated, disposable bailers The samples were sent to state-certified Sequoia Analytical <br /> Laboratories in Redwood City, California All samples were analyzed for BTEX; TPHg and <br /> TPHd A travel blank (TB-1) was also submitted for laboratory analysis at the request of <br /> Chevron <br /> Petroleum hydrocarbon constituents were not detected in monitoring well MW3 Groundwater <br /> from MWI contained TPHg at 55 ppb and TPHd at 100 ppb, reported as discrete peaks <br /> Groundwater from well MW2 contained TPHd at 67 ppb, reported as a discrete {peak The <br /> travel blank (CS-TBI) was reporters to contain 150 ppb TPHd and did not appear to match the <br /> chromatographs of samples collected from wells MW 1 and MW2 This was due to laboratory <br /> error or to contamination by the plastic water container from which the travel) blank was <br /> prepared Laboratory reports and chain-of-custody documentation are presenter) in Appendix <br /> II Laboratory results are summarized in Table 3 <br /> 4.0 CONCLUSIONS <br /> ' Groundwater has been monitored in wells MW1, MW2, and MW3 since May 1991 The data <br /> show only a slight fluctuation in the groundwater table elevation during this time (Table 2) The <br /> ' gradient magnitude and direction have also remained nearly constant Groundwater flow has <br /> ' been to the north-northwest at a gradient ranging from 0 025 to 0 03 ft/ft <br /> Results of laboratory analyses indicate that groundwater beneath the site has not been <br /> significantly impacted by petroleum hydrocarbons Detected analytes in the gasoline and diesel <br /> range have remained consistent at 160 ppb or lower, and no BTEX constituentsl have been <br /> detected since June, 1992 <br /> {Prod DisklReportslSAR1093 FNL} 4 <br />