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TABLE 2 ANALYTICAL RESULTS GROUND WATER FORMER EXXON SERVICE STATION RAS #7-0137 1605 SOUTH ELDORADO, STOCKTON, CALIFORNIA (All ttesults m pmts-per-btlhoo) Monitoring Date Total Aromatic Volatile Organics Well Collected Petroleum Hydrocarbons Ethylene Total Gasoline Benzene Toluene Ethyl- Total DLbromtde Lead benzene Xylenes MW-3 07/11/91 940 90 15 < 78 <0 5 <5 0 10/17/91 390 4 3 1 8 52 47 <0 05 so 01/17/92 580 170 4 6 13 0 100 <0 02 9 0 04/22/92 550 11 1 2 78 85 --- 90 09/24/92 420 8 8 3 8 12 80 --- --- 12/17/92 620 17 22 12 84 --- --- 03/25/93 910 37 12 21 130 06/21/93 640 21 11 14 73 - - 08/24/93 460 13 5 7 12 49 - 11/24/93 67 26 0 6 14 53 - - 02/15/94 300 11 13 15 3 2 — - 05/12/94 220 3 8 4 6 < 7 0 08/16/94 240 66 < 4 0 86 11/16/94 400 23 38 13 22 --- 02/10/95 220 42 < 069 < -- 05/12/95 250- 15 < 70 3 7 - 08/10/95 180- 19 «10 «10 «10 --- --- MW-4 --MW-4 06/21/93 < < < < --- --- 08/24/93 < 3 2 < 38 --- --- 11/24/93 < 4 < 02/15/94 1 < 05/12/94 < < < < < 08/16/94 < < < < < - -- 11/16/94 < < < < < 02/10/95 < < 2 4 059 3 0 -- - 05/12/95 < < < < < 08/10/95 < < < < < --- MW-5 06/21/93 350 17 08 < 73 --- --- 08/24/93 210 12 4 3 < 3 7 -- 11/24/93 200 7 2 07 < 2 4 -- - 02/15/94 160 < 0 6 < 08 05/12/94 140 < < < < .-- 08/16/94 52 < < c t --- - 11/16/94 110 l l 2 7 < < --- --- 02/10/95 200 < < < < --- 05/12/95 130- < 11 < 10 --- 08/10/95 64- 22 < < < -- --- 11 NOTES < = Below Practical Quantitation Reporting Limits(PQL)per'rn Regional Board Staff Recommendations for Preliminary Evaluation and Invesogaoon of Underground Tank Saes (August 10 1990) (POL for 13TEX=0 5 ppb TPH as gasoline and diesel=50 ppb) « _ Less than indicated elevated laboratory delaction limit = Nat analyzed • = Laboratory reported unidentified hydrocarbon<C8 Fugfo 934710441August 1995