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<br /> Table 1
<br /> Page 1 of 6
<br /> Groundwater Monitoring Data
<br /> Former ARCO Service Station No. 2168, 441 Charter Way, Stockton, California
<br /> well Elevation Static Elevation Top
<br /> Sample of Top Water of of Tom
<br /> Number Date of Casing Level Groundwater Screen TPHG Benzene Toluene Edt lbenzene Xylenes MTBE[1] Observations
<br /> W-1
<br /> -40-MW-1 05/11/92 1045 4027 -2982 360 60,000 5,900 1,600 430 800 NA No FP,No S,Yes O
<br /> MW-1(54) 08/24/92 1045 4206 -3161 14,000 4,100 330 310 490 NA No FP,No S,Yes O
<br /> MW-1(54) 12/17/92 1045 4279 -3234 14,000 3,500 410 400 800 NA No FP,No S,Yes O
<br /> MW-1(54) 03/10/93 1045 4042 -2997 28,000 6,500 340 580 1,700 NA No FP,No S,Yes 0
<br /> MW-1(54) 06/10/93 1045 3858 -2813 23,000 5,600 640 470 1,400 NA No FP,No S,Yes 0
<br /> MW-1(54) 09/02/93 1045 3950 -2905 27,000 7,500 700 620 2,300 NA No FP,No S,Yes O
<br /> MW-1(54) 10/28/93 1045 3973 -2928 31,000 8,900 1,200 830 2,300 NA No FP,No S,Yes 0
<br /> MW-1(39) 03/23/93 1045 3923 -2978 34,000 8,300 630 740 2,400 NA No FP,No S,Yes 0
<br /> MW-1(39) 06/29/94 1045 3902 -2857 36,000 11,000 11,500 840 3,300 NA No FP,No S,O=NE
<br /> MW-1(41) 09/26/94 1045 4025 -2980 34,000 6,000 490 550 1,400 NA No FP,No S,O=NE
<br /> MW-1(41) 12/01/94 1045 4041 -2996 60,000 7,100 1,000 290 710 NA No FP,No S,O=NE
<br /> MW-1(54) 02/16/95 1045 37 11 -2666 36,000 11,000 460 990 3,200 NA No FP,No S,O=NE
<br /> MW-1(53) 05/17/95 1045 3261 -2216 38,000 12,000 790 1,100 3,400 NA No FP,No S,O=NE
<br /> MW-1(54) 08/15/95 1045 3213 -2168 45,000 10,000 330 1,000 3,300 NA No FP,No S,Yes 0
<br /> -1(54) 11/29/95 1045 3232 -2187 46,000 9,800 370 1,100 2,900 NA No FP,No S,Yes 0
<br /> MW-1 02/27/96 Well Inaccessible
<br /> MW-1(53) 05/15/96 1045 2788 -1743 34,000 9,400 670 1,000 2,100 <25* No FP,No S,Yes 0
<br /> MW-1(53) 08/22/96 1045 2850 -1805 35,000 9,100 1,000 1,000 2,000 <500* No FP,No S,Yes 0
<br /> MW-1 11/25/96 1045 2871 -1826 37,000 7,900 460 870 1,500 <500* No FP,No S,Yes 0
<br /> MW-1 02/24/97 1045 2466 -1421 37,000 8,300 740 900 2,200 <500* No FP,No S,Yes 0
<br /> MW-1 05/19/97 1045 2454 -1409 30,000 8,200 310 780 1,100 <600* No FP,No S,Yes 0
<br /> MW-1(54) 08/21/97 1045 2562 -1517 28,000 8,200 380 860 1,100 <2,000** No FP,No S,Yes 0
<br /> MW-1(54) 11/17/97 1045 2667 -1622 23,000 9,300 580 820 1,300 <1,000** No FP,No S,Yes O
<br /> W-2
<br /> 40-MW-2 05/11/92 1083 4063 -2980 360 14,000 2,100 160 <50 1,100 NA No FP,No S,Yes 0
<br /> MW-2(53) 08/24/92 1083 4244 -3161 12,000 2,400 1,100 110 600 NA No FP,No S,Yes O
<br /> MW-2(53} 12/17/92 1083 4318 -3235 13,000 2,500 1,500 190 880 NA No FP,No S,Yes O
<br /> MW-2(53) 03/10/93 1083 4077 -2994 16,000 3,300 1,500 210 100 NA No FP,No S,Yes 0
<br /> 06/10/93 1083 3894 -2811 19,000 3,700 1,800 280 1,100 NA No FP,No S,Yes O
<br /> �I
<br /> emcon
<br /> N\}CI W8051461N21297M1 XLS 2127198
<br /> Sheetl
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