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<br /> Table 1 (Continued)
<br /> Groundwater Monitoring Data
<br /> ARCO Service Station 2168
<br /> 441 Charter Way, Stockton, California
<br /> Page 2 of 4
<br /> Well Elevation Static
<br /> Sample of Top of Water Elevation of Ethyl- Total
<br /> Number Dale Casing Level Groundwater TPHG Benzene Toluene benzene Xylenes Observations
<br /> MW-3
<br /> W-39-MW3 05/11/92 958 39 05 -2947 65,000 13,000 3 000 1,800 8,300 No FP, No S, Yes 0
<br /> MW-3(54) 08/24/92 958 4084 -3126 77,000 15,000 9,400 2,300 2,300 No FP, No S, Yes 0
<br /> MW-3(54) 12/17/92 958 4169 -32 If 67,000 12,000 5,500 2,100 7,200 No FP, No S, Yes 0
<br /> MW-3(54) 03/10/93 958 3954 -2996 51,000 16,000 1,300 1,800 4,900 No FP, No S, Yes 0
<br /> MW-3(54) 06/10/93 958 3742 -2784 44,000 12,000 2 100 1,800 3,200 No FP, No S, Yes 0
<br /> MW-3(54) 09/02/93 9 58 3823 -2865 49,000 13,000 2,200 2,100 4,500 No FP, No S, Yes 0
<br /> MW-3(54) 10/28/93 9 58 3846 -28 88 46,000 14,000 1,900 2,000 4,200 No FP, No S, Yes 0
<br /> MW3-36 03/23/94 958 38 02 -2844 42,000 12,000 2 300 1,900 3,300 No FP, No S, Yes 0
<br /> MW3-36 06/29/94 958 37 83 -28 25 44,000 14,000 5,300 1,800 5,500 No FP, S=NE, O=NE
<br /> MW-4 01/20/93 1234 4435 -32 01 NS NS NS NS NS No FP, No S, Yes 0
<br /> MW-4 01/26/93 1234 4399 -3165 NS NS NS NS NS No FP, No S, Yes O
<br /> MW-4(59) 03/10/93 12 34 4242 -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 1234 4068 -2834 110,000 9,100 I7,000 2,700 13,000 No FP, No S, Yes 0
<br /> MW-4(59) 09/02/93 1234 41 59 -2925 110,000 12,000 21 000 2,700 13,000 No FP, No S, Yes 0
<br /> MW-4(59) 10/28/93 1234 41 78 -2944 90,000 11,00 20 000 2,700 13,000 No FP, No S, Yes 0
<br /> MW4-38 03/23/94 1234 4123 -2889 38,000 7,600 12 000 2,000 10,000 No FP, No S, Yes 0
<br /> MW4-38 06/29/94 12 34 4106 -28 72 43,000 2,400 2 800 1 000 5,800 No FP, S=NE, O=NE
<br /> S pio�Oso5V08o51110 Id-94 pas 4
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