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r r TABLE 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES EPA Method 80151802018260 Den's Auto Repair- 308 South El Dorado Street, Stockton, California Well Sample Ground Screen TPH-g Benzene oluene Ethyl- Xylene MTBE DIPE ET'BE ITAME TBA Methanol Ethanol EDB 1,2_ I D Date Water Interval benzene -- 8260 DCA Depth (feet bsg) _ W2B 09-24-97 3032 45-25 feet 11,000 120 20 190 1,500 <30 74 <30 <30 <150 04-09-98 2536 4,700 340 10 85 44 <2 0 15 <2 0 52 200 11-20-98 2503 5,300 1,100 11 250 230 <25 <25 <25 <25 650 -- -- -- -- 09-23-99 2448 3,235 900 30 195 420 1,250 17 <0 5 250 <0 5 12-30-99 2505 4,240 220 86 42 648 202 26 131 454 <0 5 03-30-00 2340 20,800 82 70 11 36 <0 5 29 <0 5 36 <10 -- -- <5 0 <5 0 04-09-01 2391 4,680 490 10 90 74 20 <0 5 <0 5 <0 5 160 <25 <25 <0 5 <0 5 10-18-01 2574 3,900 97 12 78 26 39 2.0 <1 0 <1 0 480 <500 <50 <1 0 <1 0 W3A 1 09-24-97 3151 65-60 feet 1,100 099 39 24 71 <5 0 27 <5 0 <5 0 91 -- -- __ -- 04-09-98 2639 650 <0 5 34 14 33 <1 0 <1 0 <1 0 <5 0 75 11-20-98 2629 330 <0 5 16 0.71 20 <1 0 1.2 <1 0 <1 0 16 09-23-99 2564 1,735 0 56 11 50 80 2.5 <0 5 <0 5 <0 5 <0 5 12-30-99 2602 200 <0 5 <0 5 0.6 06 <0 5 <0 5 <0 5 35 <0 5 -03-30-00 24 19 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <10 — — <5 0 <5 0 04-09-0I -2501 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 '<0 5 <10 <25 <25 �0 5 <0 5 10-18-01 2695 220 1.1 0.68 <0 5 088 <1 0 <1 0 <1 0 <1 0 <5 0 <500 <50 <1 0 <1 0 W313 09-24-97 _-31 24 40-20 feet 1,600 <0 5 2.1 21 6.0 <5 0 <5 0 <5 0 <50 <5 0 -- __ __ __ , 04-09-98 2620 420 <0 5 14 3.1 39 <1 0 <1 0 <1 0 <5 0 <1 0 _ 11-20-98 2608 <50 <0 5 099 <0 5 077 <1 0 <1 0 <1 0 <1 0 <5 0 -- -- -- — 09-23-99 2544 900 2.3 10 60 9.0 <0 5 <0 5 <0 5 <0 5 <0 5 — — — 12-30-99 2618 220 <0 5 <0 5 07 0.5 <0 5 <0 5 <0 5 35 <0 5 — — — — 03-30-00 24 10 520 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 _ <0 5 <0 5 <10 — — <5 0 <5 0 04-09-01 2483 . <50 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <10 _ <25 <25 <0 5 <0 5 10-18-01 2676 470 <0 5 <0 5 <0 5 077 <10 I <1 0 <1 0 <1 0 <5 0 <500 <50 1 <1 0 <1 0 ' Notes Methyl-tertiary Butyl Ether(MTBE) Ground water depth measurements in feet tertiary-Amyl Methyl Ether(TAME) pg/l micrograms per liter tertiary-Butanol(TBA) TPH-g=Total petroleum hydrocarbons quantified as gasoline ethylenedibromide(EDB) DE-isopropyl Ether(DIPE), 1,2 dichloroetban(1,2-DCA) - - Ethyl tertiary-Butyl Ether(FTSE), _ - Advanced GeoEnvironmental,Inc _ _ }