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• TA4)1
<br /> HISTORICAL GROUNDWATER MONITORING DATA
<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(feet Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MtBE Oxygen
<br /> &Sample Date nw) (feet bgs) (feet nut) (feet bgs) ug/L ug/L ug/L ug/L ug/L ug/L (ppm)
<br /> MW-1 54 2/16/1995 1045 37 It 2666 355 36,000 11 000 460 990 3200 NA NA
<br /> 53 5/17/1995 32 61 -2216 38 000 12,000 790 1,100 3 400 NA NA
<br /> 54 8/15/1995 3213 -2168 45,000 10,000 330 1,000 3,300 NA NA
<br /> 54 11/29/1995 3232 -2187 46,000 9,800 370 1,100 2 900 NA NA
<br /> 2/27/1996 Well Inaccessible
<br /> 53 5/15/1996 2788 -1743 34 000 9,400 670 1 000 2,100 <25*(1] NA
<br /> 53 8/22/1996 2950 -1805 35,000 9 100 1 000 1,000 2000 <500*[I] NA
<br /> I I125/1996 2871 1826 37 000 7,900 460 870 1,500 <500*[l; NA
<br /> 2/24/1997 2466 1421 37 000 8,300 740 900 2200 <500*[1] NA
<br /> 5/19/1997 2454 -1409 M 000 8,200 310 780 1 100 <600*[l] NA
<br /> 54 8/21/1997 2562 1517 28,000 8,200 380 860 1,100 X2000-11] NA
<br /> 54 11/17/1997 2667 -1622 23 000 9 300 580 820 1300 <1,000**[1] NA
<br /> 54 2/9/1998 2409 1364 20,000 6 800 360 700 1,100 <1,000**[1] NA
<br /> 53 5/22/1998 2008 963 20,700 6,650 413 588 1,030 <100 NA
<br /> 53 8/12/1998 2026 991 22,000 8,690 510 785 1,220 Q NA
<br /> 53 11/9/1998 2140 -1095 21,300 7,420 289 628 1,020 2420 NA
<br /> 53 2/17/1999 2060 -1015 2 650 834 483 902 138 2380 NA
<br /> 53 5/25/1999 1996 -951 22 600 8,410 291 854 1 160 3080 NA
<br /> 53 8/18/1999 2195 -1150 19 400 7,860 228 670 958 1160 NA
<br /> 53 12117199[2] 2190 -1145 15,900 5,630 121 379 579 3440 NA
<br /> 53 2/22/2000 2113 1068 19 700 8 830 228 800 932 1930 NA
<br /> 54 6/2212000 1999 -944 19 900 6,020 139 401 486 1320 NA
<br /> 8/30/2000 2092 -1047 18 300 8 600 254 654 650 228 NA
<br /> 11/21/2000 2160 -1115 6,620[4] 1,570 703 908 199 128 NA
<br /> 2/15/2001 2167 -1122 11 300[7] 3,490 136 450 329 226 10
<br /> 5/17/2001 2090 -1045 8,630(5] 3 190 <50 197 137 243 07
<br /> 8/16/2001 22 27 1182 13 000 4,400 130 440 300 <100* 19
<br /> 12/6/2001 2,334 1289 12,000[8] 5 100 <50 340 210 <50 1 1
<br /> 2/14/2002 2174 1129 13,000 5100 110 410 250 29 13
<br /> 6/13/2002 2206 1161 10,000 2 400 87 300 240 240 09
<br /> 8/22/2002 2305 1260 13,000 5 100 160 430 330 31 10
<br /> 11/13/2002 2403 -1358 <10,000 2,200 <100 <100 <100 <100 --
<br /> MW-1B 8/30/2000 1026 2125 1099 750 504 160 69 12 262 <2 NA
<br /> 11/21/2000 2136 11 10 1 500[4] 506 165 255 553 <2 NA
<br /> 2/15/2001 2162 1136 721 [7] 233 102 175 242 <2 08
<br /> 5/17/2001 2095 1069 425[5] 158 395 909 73 G2 29
<br /> 8/16/2001 2234 -1208 67 066 <0 5 22 15 C2 20 1
<br /> 12/6/2001 2337 13 11 77[8] 30 0 63 22 13 <0 50 I 1
<br /> k U5 BP ARC01021681Quer1er1y12168 GWMR4Q02
<br /> 109 9
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