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Table 1
<br /> Groundwater Elevation and Analytical Data
<br /> Former ARCO Service Station No 2168
<br /> 441 W Charter Way, Stockton CA
<br /> Top of Depth to Water Level Ethyl- Total
<br /> Well Date P/ Casing Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP Elevation (feet bgs) (feet msl) (ugIL) (pg/L) (pglL) (pg/L) (ug1L) (pg/L) (pg/L) (mg/L) Comments
<br /> MW-5 2/2212000 -- 928 19 42 -1014 3,280 - 942 169 134 415 <2 NA (54),[31
<br /> 6/22/2000 - 928 1858 -930 1,170 -- 170 392 31 106 <2 NA (55)
<br /> 8/30/2000 -- 928 1962 -10 34 32,800 - 3,460 2 970 664 4,010 <2 NA
<br /> 11/21/2000 - 928 2037 -1109 1,920[4] - 391 361 744 233 <2 NA
<br /> 2/15/2001 -- 928 2042 -11 14 357[6] - 269 519 487 175 <2 09
<br /> 5/17/2001 - 928 1965 -1037 1,300[5] - 239 186 38 3 878 <2 1 1
<br /> 8116/2001 -- 928 2100 -1172 3 400 -- 540 42 43 230 <2 26
<br /> 12/6/2001 -- 9 28 2195 -1267 1,400 - 230 20 44 99 <5 0* 12
<br /> 2/14/2002 - 928 2049 -11 21 1 300 - 180 23 48 75 <050 15
<br /> 6/13/2002 - 928 2078 -11 50 1,700 - 200 16 51 91 <1 0[10] 08
<br /> j 8/22/2002 - 928 21 83 -1255 7,300 _ 960 270 250 1 100 <10 09
<br /> 11/13/2002 - 928 2276 -1348 <50 -- 12 <0 50 <0 50 <0 50 <0 50 -
<br /> 02/12/2003 P 928 2276 -1348 76 -- 41 <0 50 14 17 <0 50 307
<br /> 05/29/2003 P -928 21 26 -1198 110 - 59 -<050 -061 27 <0 50 368
<br /> 08/04/2003 P 9 28 21 86 -1258 390 R - 29 18 32 75 <0 50 261
<br /> 11/03/2003 P 928 2291 -1363 620 -- 58 <5 0 10 93 <5 0 2 61
<br /> 02/09/2004 P 928 22 25 -12 97 <50 -- 096 <0 50 <0 50 <0 50 <0 50 1 9T
<br /> MW-6 2/16/1995 -- 8 93 37 06 -28 13 39,000 - 6,400 5,200 850 4,400 NA NA (47)
<br /> 5/17/1995 - 893 3064 -21 71 130,000 -- 9 900 16,000 1 800 10,000 NA NA (46)
<br /> 8/15/1995 -- 893 3022 -2129 120,000 - 7,700 9 700 1,500 8,900 NA NA (46)
<br /> 11/29/1995 - 893 3030 -21 37 160,000 8,200 11,000 1 700 10 000 NA NA (45)
<br /> 2/27/1996 -- 8 93 2755 -18 62 96,000 - 10,000 13,000 1,400 8,100 NA NA
<br /> 5/15/1996 -- 893 2579 -168fi 99,000 -- 8,800 12,000 1,400 8,000 <900**[1] NA (47)
<br /> 8/22/1996 -- 893 2648 -1755 98,000 - 8,200 7,300 1,600 9,000 <1,000**[1] NA
<br /> 11/25/1996 - 8 93 26 61 -17 68 84,000 - 9,300 9,500 1,500 8,800 <900**[1] NA
<br /> 2/24/1997 - 893 2277 -1384 140,000 - 9 700 11,000 1 400 8,500 <2 000**[1] NA
<br /> 5/19/1997 -- 893 2253 .1360 69,000 -- 7,900 5,000 1,200 7,700 <600*[1] NA
<br /> 8/21/1997 - 893 2365 -1472 86,000 - 7,400 4,000 1,300 7,400 <1,000**[1] NA (45)
<br /> 11/1711997 -- $93 24 70 -15 77 42 000 - 5 400 2,100 1,100 6,600 <67 NA (41)
<br /> 2/9/1998 - 893 2201 -13 08 62,000 - 12,000 7,000 1,300 7,400 <1,000**[1] NA (43)
<br /> 5/22/1998 - 8 93 1814 c -9 21 66,100 -- 9 740 4 620 1,180 6 820 <100 NA (42)
<br /> 8/12/1998 -- 8 93 18 42 -9 49 54,700 - 7,670 2 340 1,230 61800 <200 NA (42)
<br /> 11/9/1998 - 8 93 19 73 -10 80 15,900 - 1 080 315 267 1 240 <2 NA (42)
<br /> Page 7 of 12
<br /> Report Date Apn!21,2004
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