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Table 1
<br /> Groundwater Monitoring Data
<br /> 1995 to Present Page 4 of 6
<br /> Former ARCO Service Station No. 2168
<br /> 441 Charter Way, Stockton, California
<br /> Well ID Elevation Static Elevation Top
<br /> &Sample of Top Water of of Ethyl- Total
<br /> Depth Date of Casing Level Groundwater Screen TPHG Benzene Toluene benzene Xylenes MTBE Observations
<br /> MW-5 02/27/96 928 2819 -1891 20,000 3,200 1,900 440 1,800 NA No FP,No S,Yes 0
<br /> MW-5 55 05/15/96 928 2666 -1738 43,000 6,500 5,000 790 3,400 <500*[]] No FP,No S, Yes 0
<br /> MW-5 08/22/96 928 2714 -1786 58,000 8,700 8,200 880 4,500 <500*111 No FP,No S,Yes 0
<br /> MW-5 11/25/96 928 2733 -1805 53,000 7,000 6,100 800 4,000 <600**[1] No FP,No S,Yes 0
<br /> MW-5 02/24/97 928 2330 -1402 40,000 4,400 4,700 590 3,100 <700**[1] No FP,No S,Yes 0
<br /> MW-5 05/19/97 928 2321 -1393 43,000 5,500 4,300 660 3,800 <300*[1] No FP,No S, Yes 0
<br /> MW-5 54 08/21/97 928 2429 -1501 32,000 5,200 3,900 560 3,100 <1,000[11** No FP,No S,Yes 0
<br /> MW-5 55 11/17/97 928 2533 -1605 10,000 1,700 1,300 210 1,100 <500**[11 No FP,No S,Yes O
<br /> MW-5 55 02/09/98 928 2262 -1334 4,700 740 520 110 520 <25** [1] No FP,No S,Yes 0
<br /> MW-5 54 05/21/98 928 1876 -948 1,380 167 148 264 125 <100 No FP, No S,Yes 0
<br /> MW-5 54 08/12/98 928 1996 -1068 2,450 472 250 642 284 <20 No FP,No S, Yes 0
<br /> MW-5 54 11/09/98 928 2009 -1081 13,800 2,490 1,890 337 1,640 <2 No PP,No S,Yes 0
<br /> MW-5 54 02/17/99 928 1926 -998 3,130 438 285 864 386 <2 No 1~P, No S,Yes 0
<br /> MW-5 54 05/25/99 928 1865 -937 11,800 2,060 1,060 <100 1,380 <2 No FP,No S,Yes O
<br /> MW-5 54 08/18/99 928 1980 -1052 34,400 23,800 1,130 342 1,500 <2 No FP,No S,Yes O
<br /> MW-5 54 12/17/99[2] 928 2063 -1135 <50 336 0 616 0 565 204 <2 No H,No S, O=NE
<br /> MW-5 54 02/22/00[31 928 1942 -1014 3,280 942 169 134 415 <2 No FP, No S,Yes 0
<br /> MW-6 47 02/16/95 893 3706 -2813 300 39,000 6,400 5,200 850 4,400 NA No FP,No S,O=NE
<br /> MW-6 46 05/17/95 893 3064 -2171 130,000 9,900 16,000 1,800 10,000 NA No FP,No S, O=NE
<br /> MW-6 46 08/15/95 893 3022 -2129 120,000 7,700 9,700 1,500 8,900 NA No FP,No S,Yes 0
<br /> MW-6 45 11/29/95 993 3030 -2137 160,000 8,200 11,000 1,700 10,000 NA No FP,No S, Yes 0
<br /> MW-6 02/27/96 893 2755 -1862 96,000 10,000 13,000 1,400 8,100 NA No FP,No S,Yes 0
<br /> MW-6 47 05/15/96 893 2579 -1686 99,000 8,800 12,000 1,400 8,000 <900**[1] No FP,No S,Yes 0
<br /> MW-6 08/22/96 893 2648 -1755 98,000 8,200 7,300 1,600 9,000 <1,000**[1] No FP,No S,Yes 0
<br /> MW-6 11/25/96 893 2661 -1768 84,000 9,300 9,500 1,500 8,800 <900**[1] No FP,No S,Yes 0
<br /> MW-6 02/24/97 893 2277 -1384 140,000 9,700 11,000 1,400 8,500 <2,000**[1] No FP,No S,Yes 0
<br /> MW-6 05/19/97 893 2253 -1360 69,000 7,900 5,000 1,200 7,700 <600*[1] No FP,No S,Yes 0
<br /> MW-6 45 08/21/97 893 2365 -1472 86,000 7,400 4,000 1,300 7,400 <1,000**[11 No FP,No S, Yes 0
<br /> MW-6 41 11/17/97 893 2470 -1577 42,000 5,400 2,100 1,100 6,600 <67 No FP,No S,Yes 0
<br /> MW-6 43 02/09/98 893 2201 -1308 62,000 12,000 7,000 1,300 7,400 <1,000**[ll No FP,No S,Yes 0
<br /> IT Corporation
<br /> C"atalArchiveARCOM68�QTRLY12168t1(1Q xis 04/19/2000
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