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TABLE 2 (Continued) HISTORICAL ANALYTICAL DATA-GROUNDWATER San Joaquin Catholic Cemetery ETHYL- TOTAL WELL ID DATE TPHG BENZENE TOLUENE BENZENE XYLENES MTBE LEAD MW-5 02/14/97 NS NS NS NS NS NS NS 05/15/97 NS NS NS NS NS NS NS 08/13/97 NS NS NS NS NS NS NS 11/13/97 ND<50 48 19 12 3 ND<5• NA 02/12/98 NS NS NS NS NS NS NS 05/01/98 NS NS NS NS NS NS NS 08/07/98 NS NS NS NS NS NS NS 11105198 NS NS NS NS NS NS NS 02118199 NS I NS NS NS NS NS NS VWA D 09/20/96 260 086 ND<0 5 ND<0 5 083 NA NA 02/14/97 140 072 ND<O 5 ND<0 5 ND<O 5 NA NA 05/15/97 170 ND<O 5 ND<1 ND<1 ND<2 NA NA 08/13/97 210 14 09 ND<O 5 10 90 NA 11/14/97 200 67 76 14 so 60 NA 02/12/98 110 09 ND<0 5 ND<O 5 ND<2 30 NA 05/01/98 90 ND<O 5 ND<O 5 ND<0 5 ND<2 7 NA 08/07/98 ND>50 ND>O 5 32 ND<0 5 ND<O 5 17 NA 11/05/98 ND<50 ND<O 5 N0<0 5 ND<O 5 ND<O 5 20 NA 02/18/99 4,100-' ND<0 5 ND<O 5 ND<0 5 ND<O 5 10 NA VW-2D 09/20/96 11,000 1,300 690 510 740 NA NA 02/14/97 1,400 350 290 37 160 NA NA 05/15/97 12,000 1,000 2,400 500 1,900 NA NA 08/13/97 2,400 110 96 55 97 1,800 NA 11/14/97 5,700 370 1,300 230 1,000 1,700" NA 02/12/98 1,300 120 240 60 200 650 NA 05/01/98 2,200 300 420 150 380 600 NA 08/07/98 550 220 31 11 13 650 NA 11/05/98 4,200 470 360 320 780 1,000 NA 02/18/99 3,200 70 ND<5 140 32 870 NA MW-6 05/01/98 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<2 ND<5 NA 08/07/98 N0<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 ND<O 5 NA 11/05/98 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 ND<5 NA 02/18199 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<O 5 ND<5 NA MW-7E06/18119987 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<2 ND<5 NA ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 NA ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 NA ND<50 ND<0 5 ND<O 5 ND<0 5 ND<O 5 ND<5 NA WELL#2 ND<100 ND<0 5 ND<1 ND<1 ND<2 NA NA Notes All data are presented in parts per billion(ppb) Total Petroleum Hydrocarbons as Gasoline(TPHG)analyzed by modified EPA Method 8015 Benzene Toluene Ethylbenzene Xylenes(BTEX)and Methyl-tertiary-butyl ether(MTBE)by EPA Method 8020 Total Lead analyzed by EPA Method 239 2 "MTBE analyzed by EPA 8260 ""Results indicate hydrocarbons that are not typical of gasoline ND<0 5=Not detected at laboratory reporting limit of 0 5 ppb NA=Not analyzed for indicated parameter NS=Well was not sampled on indicated date On April 18 1991 samples from MW-1 were sent to two different laboratories for comparison purposes