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<br /> HISTORICAL GROUNDWATER MONITORING DATA
<br /> Former ARCO Service Station No 2168
<br /> 441 Charter Way
<br /> Stockton,Cal form
<br /> Elevation
<br /> Top of Static Water Water Depth to Ethyl Total Dissolved
<br /> Well 113 Casing(feet Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MtBE Oxygen
<br /> &Sample Date msl) (feet bgs) (feet msl) (feet bgs) ug/L ug/L ug/L ug/L ug/L ug/L (ppm)
<br /> MW4 2/14/2002 2389 1155 20,000 5 800 200 1,100 890 <1001101 10
<br /> (cont) 6/13/2002 2415 -1181 21,000 4400 170 860 790 <50[10] 08
<br /> 8/22/2002 25 18 -1284 32,000 9,700 800 1,600 1,700 100 08
<br /> 11/13/2002 2610 1376 <50,000 15,000 <500 1,900 <500 <500 --
<br /> V12J2003 2601 1367 <50 14 <0 5 1 <0 5 <0 5 21
<br /> MW 5 39 2/16/1995 929 3578 -2650 370 180 000 8,500 15,000 2,200 12,000 NA NA
<br /> 55 5/17/1995 3123 -2195 22 000 3 400 2 100 390 2,400 NA NA
<br /> 55 8/1S/1995 3093 -2155 32,000 4,200 3,500 410 2,500 NA NA
<br /> 55 11/29/1995 3100 -2172 52,000 8,300 8,100 810 4100 NA NA
<br /> 2/27/1996 2819 -1891 20 000 3,200 1,900 440 1,800 NA NA
<br /> 55 5/15/1996 26156 1739 43 000 6,500 5 000 790 3,400 <500*[1] NA
<br /> 8/22/1996 2714 1786 58,000 8 700 8200 880 4,500 <500*[I] NA
<br /> 11/25/1996 2733 1805 53,000 7,000 6,100 800 4 000 <600**[1] NA
<br /> 2/24/1997 2-330 1402 40,000 4,400 4,700 590 3,100 <700**[1] NA
<br /> 5/19/1997 2321 1393 43,000 5,500 4,300 660 3,800 <300*[1] NA
<br /> 54 8/21/1997 2429 1501 32,000 5,200 3,900 560 3,100 <1000[1]** NA
<br /> 55 11/17/1997 2533 1605 10,000 1,700 1,300 210 1 100 <500**[1] NA
<br /> 55 2/9/1998 2262 -1334 4,700 740 520 110 520 <25**[1] NA
<br /> 54 5/21/1998 1876 948 1 380 167 148 264 125 <100 NA
<br /> 54 8/12/1998 1996 -1068 2,450 472 250 642 284 <20 NA
<br /> 54 11/9/1998 2009 1081 13,800 2,490 1,890 337 1,640 <2 NA
<br /> 54 2/17/1999 1926 998 3,130 438 285 864 386 <2 NA
<br /> 54 5/25/1999 1865 937 11 800 2060 1 060 <100 1 380 <2 NA
<br /> 54 8/18/1999 1990 1052 34 400 23,800 1,130 342 1,500 <2 NA
<br /> 54 12/17199[2] 2063 1135 <50 336 0 616 0 565 204 <2 NA
<br /> 54 02/22/00131 1942 1014 3 280 942 169 134 415 <2 NA
<br /> 55 6/22/2000 1858 930 1,170 170 39 31 106 <2 NA
<br /> 8/30/2000 1962 1034 32,800 3,460 2,970 664 4 010 <2 NA
<br /> 11/21/2000 2037 1109 1,920[4] 391 361 744 233 <2 NA
<br /> 2/15/2001 2042 11 14 357[6] 269 5 19 487 175 <2 09
<br /> 5/17/2001 1965 1037 1 300[5} 239 186 383 878 <2 1 1
<br /> 8/16/2001 2100 1172 3,400 540 42 43 230 <2 26
<br /> 12/62001 2195 -1267 1400 230 20 44 99 <5 0* 12
<br /> 2/14/2002 2049 -1121 1,300 180 23 48 75 <0 50 15
<br /> 6/13/2002 2078 -1150 1,700 200 16 51 91 <1 0[10] 08
<br /> 8/222002 2183 -1255 7,300 960 270 260 1,100 <10 09
<br /> 11/13/2002 2276 1348 <50 12 <0 50 <0 50 <0 50 <0 50 --
<br /> K 1T5 BP ARM021681Quarleslyl1 QTR 0312168 GWMR 1Q03
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