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TABLE 1
<br /> Groundwater Monitoring and Analytical Data
<br /> Former ARCO Service Station Na 2168
<br /> 441 Charter Way
<br /> Stockton, California
<br /> Elevation
<br /> Top of Static Groundwater Depth to Ethyl- Total Dissolved
<br /> Well ID Casing Water Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MtBE Oxygen
<br /> &Sample Date (feet msl) (feet bgs) (feet msl) (feet bgs) ug/L ug/L ug/L ug/L ug/L ug/L (mg/L)
<br /> MW-4 58 5/22/1998 22 21 -9 87 16,700 5,360 511 663 715 <100 NA
<br /> (cont) 58 8/12/1998 22 34 -1000 19,300 5,880 890 678 911 <20 NA
<br /> 58 11/9/1998 2342 -11 08 23,500 6,340 720 692 875 45 9 NA
<br /> 58 2/17/1999 22 65 -1031 21,300 6,970 950 907 1,030 66 6 NA
<br /> 58 5/25/1999 2202 -9 68 53,700 9,870 4,870 <100 4,600 64 6 NA
<br /> 58 8/18/1999 2309 -1075 34,400 7,390 4,200 1,260 3,610 57 2 NA
<br /> 58 12117199[2] 2398 -11 64 14,700 5,030 859 538 291 58 6 NA
<br /> 58 2/22/2000 2326 -1092 1,810 477 208 736 182 622 NA
<br /> 59 6/22/2000 2197 -963 12,000 4,200 35 2940 224 48 8 NA
<br /> 8/30/2000 2299 -1065 27,200 8,180 687 748 1,170 90 NA
<br /> 11/21/2000 2389 -1135 13,200[4] 4,540 <50 438 306 576 NA
<br /> 2/15/2001 2378 -1144 24,800[6] 6,200 188 790 566 55 2 1 0
<br /> 5/17/2001 2301 -1067 16,600[5] 4,720 117 498 514 582 1 6
<br /> 8/16/2001 2434 -1200 20,000 4,900 110 830 910 <100* 1 9
<br /> 12/6/2001 25 45 -1311 <50,000 6,200 <500 800 560 <500* 1 0
<br /> 2/14/2002 23 89 -11 55 20,000 5,800 200 1,100 890 <100[10] 10
<br /> 6/13/2002 2415 -11 81 21,000 4,400 170 860 790 <50[10] 0 8
<br /> 8/22/2002 2518 -1284 32,000 9,700 800 1,600 1,700 100 0 8
<br /> 11/13/2002 2610 -1376 <50,000 15,000 <500 1,900 <500 <500 --
<br /> 2/12/2003 26 01 -1367 <50 14 <05 1 <0 5 <0 5 21
<br /> 5/29/2003 2481 -1247 14,000 4,400 <25 490 120 <120 4 3
<br /> MW-5 39 2/16/1995 9 28 3578 -26 50 370 180,000 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 8/15/1995 3083 -21 55 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 2819 -1891 20,000 3,200 1,900 440 1,800 NA NA
<br /> 55 5/15/1996 2566 -1738 43,000 6,500 5,000 790 3,400 <500*[1] NA
<br /> 8/22/1996 2714 -1786 58,000 8,700 8,200 880 4,500 <500*[1] NA
<br /> 11/25/1996 2733 -1805 53,000 7,000 6,100 800 4,000 <600**[1j NA
<br /> 2/24/1997 2330 -1402 40,000 4,400 4,700 590 3,100 <700**[1j NA
<br /> 5/19/1997 23 21 -1393 43,000 5,500 4,300 660 3,800 <300*[i] NA
<br /> 54 8/21/1997 2429 -1501 32,000 5,200 3,900 560 3,100 <1,000[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 26 4 125 <100 NA
<br /> K 1W procem\35 BP ARC01021681duarterly\2 QTR 0312168 GW MR 2003
<br /> 5of10
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