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table have been less than 13 feet in all of the sampling events since monitoring wells were first installed 1n August of 1994 The initial water table elevations would be expected to represent historical low water levels because they were measured after several years of drought 6.2 Ground Water Sampling Results ' Ground water samples were collected from all nine of the on-site ground water monitoring wells on March 22, and again on June 19, 1996 as part of the continuing quarterly sampling program Samples collected from the newly installed wells during the ' March, 1996 sampling event indicated the presence of low levels of gasoline and gasoline constituents at monitoring wells MW-8 and MW-9 The sample collected at MW-7 during the March event contained no detectable levels of analyzed constituents Analytical laboratory data obtained from the remaining six wells were consistent with data obtained from previous quarterly sampling events ' T ABLE 3 Analytical Laboratory Data for Ground Water Samples Last Two Sampling Events Analyte Sample Date Benzene Toluene Ethyl Tota! MTBE TPH-Gas Location Collected (pg/L) (pg/L) Benzene Xylene (pg/L) (mg/L) (pg/L) (pg/L) ' MW-1 03/22/96 82QI) 6100 1600 5600 NA g9 MW-1 06/19/96 �`3q 40{0 1001) 3+100 ND MW-2 03/22/96 ND ND ND ND NA ND ' MW-2 Well not sampled MW-3 03/22/96 ND ND I ND I ND NA ND MW-3 Well not sampled MW-4 03/22/96 ND ND I ND I ND NA ND MW-4 Well not sampled MW-5 03/22/96 ND ND ND ND NA ND MW-5 06/19/96 ND ND ND ND ND ND ' MW-6 03/22/96 Q 8 1 T-7 28 .31 NA 064 MW-6 06/19/96 ND ND 1 $ 1 ND Q MW-7 03/22/96 ND ND ND ND NA ND MW-7 06/19/96 ND ND ND ND ND ND MW-8 03/22/96 ND 04 12 2.7 NA MW-8 06/19/96 ND ND ND ND ND ND MW-9 03/22/96 ND ND 05 1.7 NA Q 0� ' MW-9 06/19/96 ND ND ND ND ND ND ND =Not detected above the laboratory detection limit �t NA = Sample not analyzed for constituent f n American Geological Services, Inc CA95DE-029 ' 12