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TA 2 ANALYTICAL RESULTS GROUNDWATER MOORE PETROLEUM,INC 14800 WEST FRONTAGE ROAD,MANTECA,CALIFORNIA (All results in pg/L, parts-per-billion) Monitoring Date Total Petroleum Aromatic Volatile Organics Well Collected Hydrocarbons Gasoline Benzene Toluene Ethyl- Total EDB EDC benzene Xylenes MW-1 08/22/88+ < < < < < «0 1 36 05/11/89+ < 21 < < 60 «0 2 «0 2 01/08/90+ 1,000 0 3 1 9 < < «0.1 «0 1 06/28/90+ 110 08 130 0 4 6 3 «0 1 6.5 01/31/91 120* 09 0 6 < < «0 1 220 04/23/91 440* 11 0 < < 0 5 «0 1 35.0 07/22/91 < < < < < «0 5 140 10/21/91 220 25 < < 0 5 --- --- 11/21/91 130 1 3 < < 0 7 — --- 01/31/92 390** 4 9 < < 1 2 --- --- 04/20/92 < < < < < — — 07/28/92 140 6 0 3 0 05 3 0 — --- MW-2 08/22/88+ 200 < < < 4 0 <<O 1 0 4 05/11/89+ 100 1 7 7 0 < 5 0 <<O 2 «0 2 01/08/90+ 290 1 2 < < 05 «0 1 5 8 06/28/90+ 370 1 1 0 8 < 31 «0 1 «0.1 01/31/91 450* 1 2 0 5 < 0 6 «0 1 34 04/23/91 340* 09 < < 0 7 «0 1 «0 1 07/22/91 210 < 0 5 < 1.2 «0 5 1.4 10/21/91 150 < < < 2 4 —11/21/91 140 1 5 < < 0 6 — --- 01/31/92 730** < < < < — — 04/20/92 < < < < < --- — 07/28/92 180 < < < 0 6 --- — NOTES EDB - Ethylene dlbromlde EDC = 1,2 dlchloroethane + Groundwater analytical results reprinted from previous consultant'sreports < = Below Practical Quantitation Reporting Limits per"Tri-Regional Board Staff Recommendations for Preliminary Evaluation and Investigation of Underground Tank Sites"(August 10,1990) (PQL for BTEX=0 5 ppb,TPH,as gasoline and diesel=50 ppb) << Below Indicated detection limit -- = Not analyzed • = Laboratory reports indicate this Is weathered gasoline *' = Laboratory reports indicate total petroleum hydrocarbons as gasoline,result is due to a petroleum hydrocarbon that does not appear to be gasoline Aegis Environmental Inc