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<br /> TABLE 1
<br /> GROUNDWATER MONITORING DATA
<br /> ARCO Service Station No 2168
<br /> 441 Charter Way
<br /> Stockton, California
<br /> Page 2 of 3
<br /> Well/ Static
<br /> Sample Elevation of Water Elevation of Ethyl- Total
<br /> Number Date Top of Casing Level Groundwater TPHg Benzene Toluene benzene Xylenes Observations
<br /> MH-4
<br /> MW-4 01/20/93 12 34 44 35 -32 01 NS NS NS NS NS No FP, No S. Yes 0
<br /> MW-4 01/26/93 12 34 43 99 -31 65 NS NS NS NS NS No FP, No S, Yes 0
<br /> MW-4(59) 03/10/93 12 34 42 42 -30 08 110,000 14,000 24,000 3,200 15,000 No FP, No S, Yes 0
<br /> MW-4(59) 06/10/93 12 34 40 68 -28 34 110,000 9,100 17,000 2,700 13,000 No FP, No S, Yes 0
<br /> MW-4(59) 09/02/93 12 34 41 59 -29 25 110,000 12,000 21,000 2,700 13,000 No FP, No S, Yes 0
<br /> MW-4(59) 10/28/93 12 34 41 78 -29 44 90,000 11,000 20,000 2,700 13,000 No FP, No S, Yes 0
<br /> MW4-38 03/23/94 12 34 41 23 -28 89 38,000 7,600 12,000 2,000 10,000 No FP, No S, Yes 0
<br /> MW-5
<br /> MW-5 01/20/93 9 28 41 12 -31 84 NS NS NS NS NS No fP, No S, Yes 0
<br /> MW-5 01/26/93 9 28 40 77 -31 49 NS NS NS NS NS No FP, No S, Yes 0
<br /> MW-5(55) 03/10/93 9 28 39 11 -29 83 49,000 9,200 6,600 830 4,200 No FP, No S, Yes 0
<br /> MW-5(55) 06/10/93 9 28 37 34 -28 06 37,000 6,400 4,100 870 3,800 No FP, No S, Yes 0
<br /> MW-5(55) 09/02/93 9 28 38 23 -28 95 51,000 7,900 6,600 990 4,800 No FP, No S, Yes 0
<br /> MW-5(55) 10/28/93 9 28 38 46 -29 18 60,000 9,200 9,000 1,200 6,700 No FP, No S, Yes 0
<br /> MW5-36 03/23/94 9 28 37 97 -28 69 58,000 9,000 8,900 940 5,600 No FP, No S, Yes 0
<br /> MU-6
<br /> MW-6(47) 10/28/93 8 93 37 08 -28 15 93,000 15,000 20,000 1,600 11,000 No FP, No S, Yes 0
<br /> MW6-41 03/23/94 8 93 37 61 -28 68 79,000 11,000 14,000 1,500 9,300 No FP, No S, Yes 0
<br /> See notes on page 3
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<br /> 0418ccar/31009-11
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