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<br /> Table 1 Page 1 of 3 Pages
<br /> Groundwater Monitoring Data
<br /> ARCO Service Station 2168,411 Charter Way,Stockton,California
<br /> Well Elevation Static Elevation
<br /> Sample of Top Water of Total
<br /> Number Date of Casing Level Groundwater TPHG Benzene Toluene Ethylbenzene Xylenes Observations
<br /> MW-1
<br /> W 40-MW-1 05/11/92 1045 4027 -2982 60,000 5,900 1,600 430 800 No FP,No S,Yes 0
<br /> MW-1(54) 08/24/92 1045 4206 -3161 14,000 4,100 330 310 490 No FP, No S,Yes O
<br /> MW-1(54) 12/17/92 1045 4279 -3234 14,000 3,500 410 400 800 No FP, No S,Yes 0
<br /> MW-1(54) 03/10/93 1045 4042 -2997 28,000 6,500 340 580 1,700 No FP, No S,Yes 0
<br /> MW-1(54) 06/10/93 1045 3858 -2813 23,000 5,600 640 470 1,400 No FP, No S,Yes 0
<br /> MW-1(54) 09/02/93 1045 3950 -2905 27 000 7 500 700 620 2 300 No FP, No S,Yes 0
<br /> MW 1(54) 10/28/93 1045 3973 -2928 31,000 8,900 1200 830 2,300 No FP, No S,Yes 0
<br /> MW-1(39) 03/23/93 1045 3923 2978 34,000 8,300 630 740 2,400 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 No FP No S,O=NE
<br /> MW-1(41) 09/26/94 1045 4025 -2980 34,000 6,000 490 550 1,400 No FP, No S,O=NE
<br /> MW-1(41) 12/01/94 1045 4041 -29 96 `60,66DD 7,100 1,000 290 710 No FP, No S,O=NE
<br /> MW-1(54) 02/16/95 1045 3711 -2666 36 000 11,000 460 990 3,200 No FP, No S,O=NE
<br /> MW-2
<br /> W-40 MW-2 05/11/92 1083 4063 -2980 14,000 2,100 160 <50 1,100 No FP, No S,Yes 0
<br /> MW-2(53) 08/24/92 1083 4244 -3161 12,000 2 400 1,100 110 600 No FP, No S,Yes 0
<br /> MW-2(53) 12/17/92 1083 4318 -3235 13,000 2,500 1,500 190 880 No FP, No S,Yes 0
<br /> MW-2(53) 03/10/93 1083 4077 2994 16 000 3 300 1,500 210 100 No FP, No S,Yes 0
<br /> MW-2(53) 06/10/93 1083 3894 -2811 19,000 3,700 1,800 280 1 100 No FP, No S,Yes 0
<br /> MW-2(53) 09/02/93 1083 3986 -2903 18,000 3,300 1 800 260 1,200 No FP, No S,Yes O
<br /> MW-2(53) 10/28/93 1083 4009 -2926 17,000 3,600 2,300 320 1 500 No FP,No S,Yes 0
<br /> MW-2(39) 03/23/93 1083 3961 -2878 29,000 4,100 2,800 410 1,600 No FP, No S,Yes 0
<br /> MW-2(39) 06129/94 1083 3940 -2857 23,000 4,400 2,600 330 1,500 No FP,S=NE,O=NE
<br /> MW-2(41) 09/26/94 1083 4064 -2981 22,000 2,300 1,200 <0 5 850 No FP,S=NE,O=NE
<br /> MW-2 12/01/94 1083 4083 -3000 31,000 4,300 3 700 460 2,100 No FP,S=NE,O=NE
<br /> MW-2(53) 02/16/95 1083 3748 2665 36,000 6,300 4,600 610 2,700 No FP, No S,O=NE
<br /> MW-3
<br /> W 39-MW-3 05/11/92 958 3905 -2947 65,000 13,000 3,000 1,800 8,300 No FP,No S, No 0
<br /> MW-3(54) 08/24/92 958 4084 -31 26 77,000 15,000 9,400 2,300 2,300 No FP,No 5,No 0
<br /> MW-3(54) 12/17/92 958 4169 -3211 67 000 12,000 5,500 2,100 7,200 No FP,No S,No 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) 09/02/93 958 3823 -2865 49,000 13,000 2,200 2,100 4,500 No FP,No S,Yes 0
<br /> MW-3(54) 10/28/93 958 3846 -2888 46,000 14 000 1,900 2,000 4,200 No FP No 5,Yes 0
<br /> MW 3(36) 03/23/93 958 3802 -2844 42,000 12,000 2,300 1,900 3,300 No FP, No S,Yes 0
<br /> MW-3(36) 06/29/94 958 3783 2825 44,000 14,000 5,300 1,800 5,500 No FP,No S,O=NE
<br /> MW-3(40) 09/26/94 958 3901 2943 45 000 9,200 2,500 1 000 2,700 No FP, No S O=NE
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