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SE I •
<br /> HISTORICAL GROUNDWATER MONITORING DATA Y
<br /> Former ARCO Service Station No 2168
<br /> 441 Charter Way
<br /> Stockton,California
<br /> Elevation
<br /> Top of Static Water Water Depth to Ethyl- Total Dissolved
<br /> Well ID Casing Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MTBE Oxygen
<br /> &Sample Date (feet msl) (feet bgs) (feet ms]) (feet bgs) Ntg/L µg/L µg/L pg/L pg/L µg/L (ppm) Observations
<br /> MW-3 53 02/16/95 958 3624 -2666 360 37,000 14,000 340 2,100 470 NA NA No FP,No S,O=NE
<br /> 53 05/17/95 958 3149 -2191 39,000 13,000 1,200 2,100 1,500 NA NA No FP,No S,O=NE
<br /> 53 08/15/95 958 3106 -2148 31,000 11,000 220 1,800 910 NA NA No FP,No S,Yes 0
<br /> 53 11/29/95 958 3125 -21 67 41,000 10,000 350 1,900 860 NA NA No FP,No S,Yes 0
<br /> 02/27/96 9 58 28 51 -1893 36,000 10,000 510 1,800 990 NA NA No FP,No S,Yes 0
<br /> 53 05/15/96 958 2682 -1724 40,000 12,000 690 2,000 1,300 <500**[1] NA No FP,No S,Yes O
<br /> 08/22/96 958 2735 -1777 53,000 14,000 2,000 2,400 2,900 <500*[1] NA No FP,No S,Yes O
<br /> 11/25/96 958 2766 -1808 45,000 11,000 1,100 2,100 1,800 <500*[1] NA No FP,No S,Yes 0
<br /> 02/24/97 9 58 23 55 -1397 38,000 9,200 460 1,800 1,200 <500*[1] NA No FP,No S,Yes 0
<br /> 05/19/97 958 2342 -13 84 38,000 9,800 620 1,900 1,100 <600*[1] NA No FP,No S,Yes 0
<br /> 53 08/21/97 958 2449 -1491 36,000 9,500 910 2,000 1,500 <2,000**f11 NA No FP,No S,Yes O
<br /> 54 11/17/97 9 58 25 57 -1599 37,000 12,000 2,100 2,100 3,000 <1,000**fll NA No FP,No S,Yes O
<br /> 54 02/09/98 958 2307 -1349 32,000 9,700 510 2,000 2,700 <%o00**f1] NA No FP,No S,Yes O
<br /> 54 05/22/98 958 19 13 -955 20,900 7,440 144 1,760 479 <100 NA No FP,No S,Yes O
<br /> 53 08/12/98 958 1927 -969 13,600 4,860 159 1,200 408 <20 NA No FP,No S,Yes O
<br /> 53 11/09/98 958 2036 -1078 26,100 9,270 375 1,950 895 <2 NA No FP,No S,Yes O
<br /> 53 02/17/99 958 1979 -1021 31,300 9,820 595 2,340 1,570 946 NA No FP,No S,Yes O
<br /> 53 05/25/99 958 19 95 -1037 24,000 9,320 356 2,220 1,070 107 NA No FP,No S,Yes O
<br /> 53 08/18/99 958 2009 -1050 26,400 9,670 364 2,250 866 15 NA No FP,No S,Yes 0
<br /> 53 12/17/99[2] 9 58 2094 -1136 26,900 8,800 113 2,070 610 5 82 NA No FP,No S,O=NE
<br /> 53 02/22/00 958 2052 -1094 1,300 487 192 122 654 6 52 NA No FP,No S,Yes 0
<br /> 53 06/22/00 958 18 87 -929 21,300 7,430 61 6 1,610 3490 244 NA No FP,No S,Yes 0
<br /> 08/30/00 958 1998 -1040 22,900 9,540 313 2,410 791 127 NA No FP,No S,Yes O
<br /> 11/21/00 958 20 73 -11 15 31,300[41 7,820 341 2,550 1,750 844 NA No FP,No S,Yes O
<br /> 02/15/01 958 2079 -1121 39,800[6] 9,680 176 2,420 1,230 6 03 0 6 No FP,No S,O=NE
<br /> C lARM21681QTRMTABLES12]68QUARTERLY DATA XLS
<br /> 3 of 8 Delta 4125101
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