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<br /> Page 1 of 3 Pages
<br /> Table 1
<br /> Groundwater Monitoring Data
<br /> ARCO Service Station 2163 411 Charter Way Stockton Cahfornia
<br /> Well Elevation Static Elevation
<br /> Sample of Top Water of Total
<br /> Number Date of Casing Level Groundwater TPHG Benzene Toluene Eth (benzene Xylenes Observations
<br /> MW-1
<br /> W-40-MWI 05/11/92 1045 4027 -2982 60,000 5 900 1,600 430 800 No FP,No S,Yes O
<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 O
<br /> MW 1(54) 03/10/93 1045 4042 2997 28,000 6,500 340 580 1,700 No FP, No S Yes O
<br /> MW-1(54) 06/10/93 1045 3858 2813 23 000 5 600 640 470 1,400 No FP, No S Yes O
<br /> MW 1(54) 09/02/93 1045 3950 2905 27,000 7,500 700 620 2,300 No FP No S,Yes O
<br /> MW-1(54) 10/28/93 1045 3973 2928 31,000 8 900 1200 830 2 300 No FP,No S Yes O
<br /> MW1 39 03/23/93 1045 3923 2978 34,000 8,300 630 740 2,400 No FP, No S,Yes O
<br /> MW1-39 06/29/94 1045 3902 -2857 36 000 11,000 11,500 840 3,300 No FP S=NE,O=NE
<br /> MW1-41 09/26/94 1045 X40 25 -2980 34,000- 6,000 490 550 1,400 No FP,S=NE,O=NE
<br /> MW-2
<br /> W 40-MW2 05/11/92 1083 4063 2980 14 000 2100 160 <50 1 100 No FP No S Yes O
<br /> MW-2(53) 08/24/92 1083 4244 3161 12,000 2,400 1,100 110 600 No FP, No S,Yes O
<br /> MW-2(53) 12/17/92 1083 4318 3235 13,000 2,500 1,500 190 880 No FP,No S Yes O
<br /> MW-2(53) 03/10/93 1083 4077 2994 16 000 3,300 1,500 210 100 No FP,No S Yes O
<br /> MW-2(53) 06/10/93 1083 3894 2811 19 000 3,700 1,800 280 1,100 No FP,No S,Yes O
<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 O
<br /> MW2 39 03/23/93 1083 3961 2878 29 000 4,100 2 800 410 1,600 No FP,No S,Yes O
<br /> MW2 39 06/29/94 1083 3940 2857 23,000 4,400 2,600 330 1,500 No FP,S=NE,O=NE
<br /> MW2 41 09/26/94 1083 4064 2981 22,000 2,300 ' 1 200 <0 5 850 No FP,S=NE,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 Na FP,No S,No O
<br /> MW 3(54) 08/24/92 958 4084 3126 77,000 15,000 9,400 2,300 2,300 No FP, No S, No O
<br /> MW 3(54) 12117/92 958 4169 3211 67 000 12,000 5 500 2,100 7,200 No FP,No S, No O
<br /> MW 3(54) 03/10/93 9 58 3954 2996 51,000 16 000 1 300 1,800 4,900 No FP, No S,Yes O
<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 O
<br /> MW-3(54) 09/02/93 958 3823 2865 49,000 13 000 2200 2 100 4 500 No FP,No S Yes O
<br /> MW-3(54) 10/28/93 958 3846 2888 46 000 14,000 1,900 2,000 4,200 No FP,No S,Yes O
<br /> MW3-36 03/23/93 958 3802 2844 42,000 12,000 2,300 1,900 3 300 No FP,No S,Yes O
<br /> MW3 36 06/29/94 958 3783 2825 44 000 14 000 5,300 1,800 5,500 No FP,No S 0=NE
<br /> MW3 40 09/26194 958 3901 2943 45,000 9,200 2,500 1,000 2,700 No FP,No S,O=NE j
<br /> As108051146011111594B1 As
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