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Table 3 Groundwater Analytical Data-Oxygenate Compounds(CHEVRON) Chevron Service Station O 8-4275 2905 West to nlamb Holt Drive Stockton, in WELL Date Methanol Ethanol TBA MtBE DIPE TAME ESBE 1,2-OCA EDIR ID Sampled Notes (NWL) (PGOL) (pgilL) (pg1L) 11AWL) (pO+L) (uWL) (WL) (POIL) MW-1 11@5197 ND NO ND 50 NO NO NO - - 03/28/98 -1,000 <500 -100 120 -2A <2.0 <2.0 - - 08124198 » c3,120 -625 25 <12 -12 <12 - - 03102/01 8 - -2,500 -250 1,300 <10 <10 <10 -10 <10 03102101 K 83 <20 970 <2.0 42.0 -2.0 <2.0 <2.0 05110/01 - - <25 2,100 <2.5 17 -2.5 c2.5 -- 08121101 - - 110 1,700 <2.5 13 <2.5 -2.5 <2.5 121051D1 - - -5.0 120 <0.5 2.9 <0.5 <0,5 <0,5 0311 VD2 - - <5. 2,200 <0.5 21 <0.5 <0.5 <0.5 08107102 - - 34 1,700 <1 15 <1 <1 09/24102 -- -100. 2,500 <2 31 <2 12 12 12717/02 - - <100 3,300 -2 34 <2 <2 <2 03f1S103 - - -100 3,300 <2 35 <2 <2 <2 06/17103 - - <100 3,200 -2 41 <2 <2 <2 09724703 - - -100 1,900 <2 22 c2 <2 <2 12/18703 -- - 990 1,400 <2 18 -2 <2 <2 03/23/04 -- 1800 160 -2 <2 -2 <2 <2 06/22704 - 3200 61 Q <2 -2 <2 <2 09121104 - - 970 9 <2 -2 <2 -2 <2 12128104 - <50 890 8 -0.5 -0.5 <0.5 -0.5 <0.5 03/07105 - -50 1,400 200 -0.5 2 -0,5 <0.5 <0.5 06/30105 Monitoring vvell destroyed MW-1R 03 UM& Not Sampled MW-2 11125197 NO NO NO 21 NO NO NO - - 03126198 -1,000 <5,000 -1,000 35 <20 <20 <20 - - 06124/98 - -1450 <290 54 -5.8 <5.8 -5.8 -- -- 03102101 S - -500 <50 410 -2.0 8.0 <2.0 -2.0 Q.0 03102101 K - -10 16 360 <0.50 5.0 -0.50 -0.50 -0.50 05110101 - - 1 210 -0.59 2.8 -0.50 -0.50 -- 08121101 <5..0 76 -0.50 -0.50 -0.50 -0.50 40,50 12105101 -6.0 4.0 -5.0 <5.0 <5.0 <5.0 c5.0 3111102 - - <5 240 <0.5 4 <0.5 <0.5 -0.5 617102 - - -5. 130 0.5 2 <0.5 0.5 <0.5 9124102 - - <100. 7 <2 <2 <2 <2 <2 t2117102 - - -100 11 c2 <2 -2 <2 <2 0311 B103 - - -100 110 <2 2 <2 -2 <y 6117103 - - -100 74 <2 c2 <2 <2 <2 09724103 - - -100 D <2 <2 <2 <2 <2 12/18703 - - <100 11 <2 <2 <2 -2 c2 03123/04 - - -100 150 <2 2 <2 <2 <2 06/22104 -- - <100 150 <2 2 <2 -2 -2 09121104 - - -100 38 <2 -2 <2 <2 <2 12128704 - -50 -5 39 -0.5 -0.5 <0.5 <0.5 <0.5 03!07105 - <50 21 300 -0.5 5 -0.5 <0.5 <0.5 06130/05 Monitoring well destroyed MW-2R 03120108 - <50 130 26 -0.5 0.8 -0.5 -0.5 <0,5 MW-3 11125197 ND NO NO 28 NO NO NO - 0386198 -1,000 -500 <100 90 <2.0 6.9 <2,0 - 06/24198 - <1,470 <294 41 <5.9 -5.9 -5.9 - 03/02101 S - <1.000 <100 430 <4.0 10 -4.0 <4.0 <4.0 03102101 K - 33 15 400 -1.0 8.9 <1.0 -1.0 c1.0 05/10101 - - <5.0 220 -0.50 4.1 -0.50 -0.50 - 0881101 - - 72 15 -0.50 -0.50 <o 50 -0.50 -O.SD 12105101 - - -5.0 27 <0.5 <0.5 -0.5 -0.5 <0.5 3111102 - - <5 1,800 <0.5 22 <D.5 <0.5 <0.5 617102 - <10 1,200 <1 14 <1 <1 <1 9124102 - - -100 450 <2' 3 <2 <2 <2 12117102 - - <100 430 <2 3 <2 <2 <2 03118103 - - -100 2,200 <2 25 <2 -2 <2 6117103 - - -100 170 <2 <2 c2 <2 <2 0984103 - - -100 22 -2 <2 -2 <2 <2 12118103 -- - -100 480 <2 4 <2 0383104 - - -100 1,800 <2 14 <2 <2 <2 0682104 - _ -100 1,600 <2 12 <2 <2 <y 0981104 -100 830 <2 4 <2 c2 <2 12728/04 -50 -5. 19 <05 <0.5 <9.5 -0.5 <0.5 1:1Chemr W427517e61es494275 OMRade 1 of 4