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<br /> HISTORICAL GROUNDWATER MONITORING DATA
<br /> Former ARCO Service Station No 2168
<br /> 441 Chartei 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 msl) (feet bgs) (feet msl) (feet bgs) ug/L ug/L ug/L ug/L ug/L ug/L (ppm)
<br /> MW-5 39 2/16/1995 928 3578 2650 37 0 180,000 8,500 15,000 2200 12 000 NA NA
<br /> 55 5/17/1995 3123 2195 22 000 3 400 2,100 390 2,400 NA NA
<br /> 55 8/15/1995 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 4,100 NA NA
<br /> 2/27/1996 26 19 1891 20 000 3200 1900 440 1,800 NA NA
<br /> 55 5/15/1996 2666 1738 43 000 6,500 5 000 790 3,400 <500*[I] NA
<br /> 8/22/1996 2714 -1786 58,000 8,700 8200 880 4 500 <500*[I] NA
<br /> 11!2511996 27 33 -1805 53 000 7 000 6 100 800 4 000 <600**[1] NA
<br /> 2124/1997 2330 -1402 40 000 4,400 4 700 590 3,100 <700**[1) NA
<br /> 5/19/1997 2321 -1393 43 000 S500 4 300 660 3,800 <300*[I] NA
<br /> 54 8!21!1997 2429 -1501 32 000 5,200 3,900 560 3,100 <1(Will** 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 2,060 1,060 <100 1,380 <2 NA
<br /> 54 8/18/1999 1980 1052 34 400 23 800 1 130 342 1,500 <2 NA
<br /> 54 12/17/99[2] 2063 -1135 <50 336 0 616 0 565 204 <2 NA
<br /> 54 02122100[3] 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 4 87 175 <2 09
<br /> 5/17/2001 1965 1037 1,300[57 239 196 393 918 <2 1 1
<br /> 8/16/2001 2100 1172 3,400 540 42 43 230 <2 26
<br /> 12/6/2001 2195 1267 1 400 230 20 44 99 <5 0* 12
<br /> 2114/2002 2049 1121 1,300 180 23 48 75 <0 50 is
<br /> 6/132002 2078 -1150 1,700 200 16 51 91 <1 0[10] 08
<br /> 8222002 2183 -1255 7,300 960 270 260 1 100 <10 09
<br /> I V13/2002 2276 -1348 <50 12 <0 50 <0 50 <0 50 <0 50 --
<br /> MW 6 47 2/16/1995 993 3706 -2913 300 39,000 6,400 5,200 850 4,400 NA NA
<br /> 46 5/17/1995 3064 -2171 130,000 9 900 16 000 1,800 10 000 NA NA
<br /> 46 8/15/1995 3022 -2129 120,000 7,700 9,700 1,500 8,900 NA NA
<br /> 45 1129/1995 3030 -2137 160,000 8,200 11,000 1 700 10,000 NA NA
<br /> 2/27/1996 2755 1862 96 000 10 000 13 000 1,400 8 100 NA NA
<br /> k vs 13P ARC0w2168\Quancr1y\2168 GWMR4Q02
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