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Table 3 HISTORICAL GROUNDWATER ANALYTICAL RESULTS AND MONITORING DATA FORMER CHEVRON SERVICE STATION NO 9-5075 2405 AIRPORT WAY STOCKI"ON CALIFORNIA WELL 1D/ ETHYL- ELEVATION BENZENE TOLUENE= BENZENE OXYLENES TPFi G DTW 5PT 1NTE C DATEb b �b b pb feet feet feet MW-1 1860 06/19/92 -- - -- - - 56 64 000 -3804 04/13/93 NO ND NO NO NO 5537 000 -3677 07/22/93 NO ND NO, Nil ND 5518 000 -3658 10/13/93 140 140 21 94 620 5673 000 -3813 04/06/94 ND ND ND ND Nil 5471 000 -3611 1864 07/08/94 NO ND NO NO ND 5444 000 -3580 08/22/94 -- -- -- -- -- 5532 1 000 -36 68 MW-2 1668 06/19/92 -- -- -- - -- 5486 000 -38 18 04/13/93 ND ND NO ND ND 5359 000 -36 91 07/22/93 ND ND NO NO ND 5338 000 -3670 10/13/93 ND ND NO NO ND 5494 000 -3826 04/06/94 ND NO NO ND ND 5494 000 -3826 1688 07/08/94 ND ND ND ND ND 5266 000 -3578 08122/94 - -- -- -- -- 5354 000 -36 66 MW-3 1736 06/19/92 -- -- - -- 5556 000 -3820 04/13/93 ND NO NO ND ND 5439 000 -3703 07/22/93 NO NO NO NO ND 5408 000 -36 72 10/13193 - - -- -- - 5569 000 -3833 04/06/94 55 54 1 6 62 NO 5368 000 -3632 1760 07/08/94 ND ND ND NO ND 5338 000 -3578. 08/22/94 - -- -- - 5421 1 000 -36 61 MW-4 1670 06/19/92 -- -- -- -- -- 5477 000 -38 07 04/13/93 ND ND NO ND ND 5355 000 -36 85 07/22/93 -- -- -- - - WELLEA HD DAMGED 10/13193 -- - -- -- - WELHEAD OAM�GED 04/06/94 -- -- -- -- WELLHEAD DAMAGED 1742 07/08/94 ND NO NO NO ND 53 11 0 D0 -3569 08/22/94 -- -- -- I -- -- 5399 000 -36 57 MW-517 74 08 22 94 ND NO NO NO NO 5429 000 --36 55 EXPLANATION All elevations given as feet relative to mean sea level ppb = parts per billion TOC =Top of casing -- = Not sampled DTW= Depth to water NO = Not detected at or above method detection limit SPT = Separate-phase hydrocarbon thickness Note See laboratory reports for method detection limits WTE = Water table elevation GARTAB2 WK1 �- 4� L� GROUNDIAIATER TECHNOLOM