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�1 <br /> ' Table 2 Analytical Results of Groundwater Samples Collected at ARCO Statzon 2093,Tracy,Califorma <br /> Aromatic volatile organics(BETX),ppb TPH, ppm <br /> Sample Date Ethyl- Gasoline Diesel Motor oil Total <br /> Number sampled Benzene benzene Toluene Xylene TPH range range range lead ppm <br /> DHS <br /> action <br /> levels <br /> (a) 1 680 1,750 620 (b) (b) (b) (c) <br /> ATR-1 4/23/87 <0 5 <0 5 <0 5 23 <0 I <0 1 <0 I <0 1 0 024 <br /> 12/22/87 59 09 <0 5 <0 5 — - <br /> 3/2.4/88 <0 5 <0 5 <0 5 <0.5 — <0 2 <0 2 <0 2 <0 I <br /> 6/23/88 <0 5 4.3 13 22 -- <0 2 <0 2 <0 2 <0 1 <br /> 929/88 <0 5 <0 5 <0 5 <0 5 -. <0 2 <0 2 <0 2 <0 I <br /> 222/89 14 <0 5 <0 5 18 <0 I <0 1 <0 I <0 I —(d) <br /> ATR-2 4/23/87 <0 5 <0 5 06 <0 5 <0 1 <0 1 <0 1 <0 1 0 018 <br /> J 12/22/87 <0 5 <0 5 <0 5 <0 5 — _ <br /> t 3/24/88 <0 5 <0 5 <0 5 <0 5 -- <0 5 <0 5 <0 5 <0 1 <br /> 6/23/88 <0 5 <0.5 <0 5 <0 5 — <0 2 <0 2 <0 2 <0 1 <br /> 9/29/88 <0 5 <0 5 <0 5 <0 5 -- <I 0 <1 0 <1 0 <0 1 <br /> 222/89 1 8 06 <br /> 07 34 037 037 <0 1 <0 1 —(d) <br /> ATR-3 423/87 2300 <5.0 180 2300 17 17 <0 1 <0 1 0 L- <br /> 12/22/87 5000 530 50 250 — _ <br /> 3/24/88 8300 4400 8700 7800 43 43 <0 5 <0 5 <0 1 <br /> 6/23/88 6160 1800 4221 4750 70 70 <0 2 <0 2 <0 I <br /> y 929/88 8850 2190 17600 8170 57.4 57.4 <10 <10 <01 <br /> 2/22/89 1000 480 2100 2000 110 110 <0 1 <0 I —(d) <br /> ATR-4 4/23/87 3000 <10 200 950 21 21 <I 0 <1 0 004 <br /> 1222/87 5300 430 310 270 — _ <br /> 3/24/88 5800 930 320 740 6 6 <0 5 <0 5 <0 1 <br /> 1 623/88 237 2 88 10 52 52 <0 2 <0 2 <0 I <br /> 929/88 1430 350 115 130 14 14 <10 <10 <01 <br /> 222/89 1300 54 82 170 220 220 <0 1 <0 I —(d) <br /> ATR-5 3/10/89 693 327 <5 0 7 66 66 <0 2 <0 2 <br /> ATR-6 3110/89 <0 5 <0 5 <0 5 <0 5 <0 2 <0 2 <0 2 <0 2 <br />' ATR-7 3/10/89 <0 5 <0 5 <0 5 17 <0 2 <0 2 <0 2 <0 2 <br /> (a)Dnnkt.ug water action levels recommended by the Department of Health Services,September 1987 <br /> (b)No acton level established <br /> (c)RWQCB primary drinlang water standard(MCL)for lead,0 05 mtWgrams/liter <br /> (d)Total lead was not tested because it has not been detected in any of the sampling intervals since March 1987 <br /> 1 <br /> 1 <br />