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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 /> TOC 1 Depth to Water Level Ethyl- Total
<br /> Well Date P1 Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msq (feet bgs) (feet msl) (pg1L) (pg1L) (411-) (pglL) (pW1L) (pg1L) (U91L) (mg1L) Comments
<br /> MW-6 2/24/1997 -- 893 2277 -1384 140,000 - 9,700 11 000 1,400 8,500 <2,000**j1] NA
<br /> 5/19/1997 - 8 93 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**j1] NA (45)
<br /> 11/17/1997 -- 893 24 70 -15 77 42,000 - 5,400 2,100 1,100 6,600 <67 NA (41}
<br /> 2/9/1998 -- 8 93 2201 713 08 62,000 -- 12,000 7,000 1,300 7,400 <1,000**[9] NA (43}
<br /> 5/22/1998 - 8 93 1814 -9 21 66100 -- 9,740 4,620 1,180 6,820 <100 NA (42)
<br /> 8/12/1998 -- 8 93 1842 -949 54,700 - 7,670 2 340 1 230 6 800 <200 NA (42)
<br /> 11/911998 - 8 93 19 73 10 80 15,900 -- 9,080 315 267 1,240 <2 NA (42)
<br /> 2/17/1999 - 893 1879 -986 53,500 -- 9,870 2 720 1,544 8,320 <2 NA (45)
<br /> 5/25/1999 -- 8 93 1812 -919 43,900 - 7,020 1,8$0 1,520 8,290 <2 NA (45)
<br /> 8/18/1999 893 1926 -10 33 40,900 - 6 260 1,590 1,470 7,460 478 NA (45)
<br /> 12/17/1999 - 893 2008 -11 15 4,080 -- 536 149 122 756 <2 NA (45},[2]
<br /> 2/22/2000 -- 893 1929 -1036 38,200 - 8,430 1,800 1,330 6,390 <2 NA (45)
<br /> 612212000 - 893 1815 .922 2,150 -- <2 51 149 141 <2 NA (48)
<br /> 8/30/2000 -- 893 1912 -1019 37,900 - 5,290 1260 1,280 5,570 <2 NA
<br /> 11/21/2000 -- 893 1983 -1090 30,100[5] - 5,120 1,080 1 150 5,150 <2 NA
<br /> 2!1512001 - 8 93 19 72 -10 79 58,200[6] - 5,930 1,400 1,540 5 820 <2 1 1
<br /> 5117!2001 - 8 93 1911 -10 18 31,700[5] - 5,210 1,090 1,380 5,020 <40 09
<br /> 8/16/2001 - 8 93 20 50 -11 57 39,000 - 5,000 1,300 1,600 5,500 <50* 07
<br /> 121612001 -- 893 21 50 -1257 28,000 - 5,800 <100 1,300 4,800 <100* 06
<br /> 211412002 -- 893 1980 -1087 32,000 -- 4100 1,100 1 400 4,800 <50110) 08
<br /> 6113112002 - 8 93 20 20 -11 27 34,000 - 3 600 1,100 1,300 4,000 <25[10] 09
<br /> 8/22/2002 -- 8 93 21 23 -12 30 27 000 -- 5,000 950 1,100 4,500 <25 1 1
<br /> 11/13/2002 - 893 22 23 -13 30 37,000 -- 5,000 900 1,400 4,600 <100 --
<br /> 02/12/2003 P 8 93 22 48 -13 55 31 000 -- 4 200 900 1 200 5,700 <50 101
<br /> 05/29/2003 P 8 93 20 58 -11 65 26,000 - 4,000 1 000 1,100 5,200 <120 467
<br /> 08/04/2003 P 8 93 21 26 -1233 27,000 - 4,100 870 730 6,000 <50 148
<br /> 11/03/2003 P 893 2222 -1329 220 R - <25 R <25 R <2 5 R <2 5 R <2 5 R 211
<br /> 02/09/2004 P 8 93 22 04 -1311 25,000 - 3,900 740 670 4,800 <50 149
<br /> 05/10/2004 P 893 21 25 -1232 17,DD0 -- 5,600 <25D 890 <250 <250 3 Ofi
<br /> MW-7 12/1/1994 - 88-8 38 87 -2999 24,000 - 800 5,70q 560 4,500 NA NA
<br /> 211611995 -- 888 -- - -- -- -- -- -- Well Inaccessible
<br /> 5/1711995 -- 888 30 50 --2162 40,000 -- 2,300 8,200 820 4,800 NA NA ,
<br /> Page 8 of 12
<br /> Report Date July 15,2004
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