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TABLE 2 CUMULATIVE ANALYTICAL RESULTS -GROUNDWATER Former Stefano's Gas Station Site, 1419 East Charter Way, Stockton, California OXYGENATES DATE ETHYL- WELL ID SAMPLED TPH-G BENZENE TOLUENE BENZENE XYLENES MTBE DIPS ETBE TAME TBA MW-1 01/11/99 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 04/22/99 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 07/23/99 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<0 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 10/14/99 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 MW-2 01/11/99 16,000 1,300 1,500 1,800 6,900 ND<20 ND<20 ND<20 ND<20 ND<200 �J 04/22/99 110,000 5,400 63,000 5,200 32,000 ND<10 ND<10 ND<10 ND<10 ND<100 07/23/99 130,000 4,700 56,000 6,100 35,000 ND<5 ND<5 ND<5 ND<5 ND<50 10/14/99 11 91,000 3,500 44,000 5,300 24,000 ND<20 ND<20 ND<20 ND<20 ND<200 MW-3 01/11/99 120,000 7,800 64,000 4,300 28,000 ND<100 ND<100 ND<100 ND<100 ND<1,000 04/22/99 11,000 790 760 1,500 4,000 ND<5 ND<5 ND<5 ND<5 100 07123/99 14,000 570 340 1,600 3,100 ND<20 ND<20 ND<20 ND<20 ND<200 10/14/99 5,900 250 53 730 860 26 ND<2 0 ND<2 0 ND<2 0 96 Notes All results except are reported in micrograms/liter which translates to parts per billion(ppb) Total Petroleum Hydrocarbons as Gasoline(TPH-G)analysis by EPA Method 82606 Benzene,toluene,ethylbenzene and xylenes analysis by EPA Method 82608 Oxygenates Methyl-t-butyl ether(MTBE), Dnsopropyl ether(DIPE),Ethyl-t-butyl ether(ETBE),Tert-amyl methyl ether(FAME)and Tert-Butanol(TBA)by EPA 8260B ND<50=Not Detected at reporting limit of 50 ppb