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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 Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MTBE Oxygen
<br /> &Sample Date (feet ms]) (feet bgs) (feet msl) (feet bgs) tig/L lug/L pg/L pg/L gg/L nlL (ppm) Observations
<br /> MW-6 47 02/16/95 893 3706 -28 13 300 39,000 6,400 5,200 850 4,400 NA NA No FP,No S,O=NE
<br /> 46 05/17/95 8 93 3064 -21 71 130,000 9,900 16,000 1,800 10,000 NA NA No FP,No S,O=NE
<br /> 46 08/15/95 893 302.2 -2129 120,000 7,700 9,700 1,500 8,900 NA NA No FP,No S,Yes 0
<br /> 45 11/29/95 893 3030 -21 37 160,000 8,200 11,000 1,700 10,000 NA NA No FP,No S,Yes O
<br /> 02/27/96 893 2755 -1862 96,000 10,000 13,000 1,400 8,100 NA NA No FP,No S,Yes O
<br /> 47 05/15/96 893 2579 -1686 99,000 8,800 12,000 1,400 8,000 <900**[1] NA No FP,No S,Yes O
<br /> 08/22/96 893 2648 -1755 98,000 8,200 7,300 1,600 9,000 <1,000**[1] NA No FP,No S,Yes O
<br /> 11/25/96 893 2661 -1768 84,000 9,300 9,500 1,500 8,800 <900**[]] NA No FP,No S,Yes 0
<br /> 02/24/97 893 2277 -1384 140,000 9,700 11,000 1,400 8,500 <2,000**[I] NA No FP,No S,Yes O
<br /> 05/19/97 893 2253 -1360 69,000 7,900 5,000 1,200 7,700 <600*[l] NA No FP,No S,Yes O
<br /> 45 08/21/97 893 23 65 -1472 86,000 7,400 4,000 1,300 7,400 <l,000**{1] NA No FP,No S,Yes O
<br /> 41 11/17/97 893 2470 -1577 42,000 5,400 2,100 1,100 6,600 <67 NA No FP,No S,Yes O
<br /> 43 02/09/98 893 2201 -13 08 62,000 12,000 7,000 1,300 7,400 <l,Oo0**[1] NA No FP,No S,Yes O
<br /> 42 05/22/98 893 18 14 -921 66,100 9,740 4,620 1,180 6,820 <100 NA No FP,No S,Yes O
<br /> 42 08/I2/98 893 1842 -949 54,700 7,670 2,340 1,230 6,800 <200 NA No FP,No S,Yes O
<br /> 42 11/09/98 893 1973 -1080 15,900 1,080 315 267 1,240 <2 NA No FP,No S,Yes 0
<br /> 45 02/17/99 893 1879 -986 53,500 9,870 2,720 1,540 8,320 <2 NA No FP,No S,Yes O
<br /> 45 05/25/99 8 93 18 12 -919 43,900 7,020 1,880 1,520 8,290 <2 NA No FP,No S,Yes 0
<br /> 45 08/18/99 893 1926 -1033 40,900 6,260 1,590 1,470 7,460 478 NA No FP,No S,Yes 0
<br /> 45 12/17199[2] 893 2008 -11 15 4,080 536 149 122 756 <2 NA No FP,No S,O=NE
<br /> 45 02/22/00 893 1929 -1036 38,200 8,430 1,800 1,330 6,390 <2 NA No FP,No S,Yes O
<br /> 48 06/22/00 893 18 15 -922 2,150 <2 5 15 14 <2 NA No FP,No S,Yes O
<br /> 08/30/00 893 1912 -1019 37,900 5,290 1,260 1,280 5,570 <2 NA No FP,No S,Yes O
<br /> 11/21/00 893 1983 -1090 30,100[5] 5,120 1,080 1,150 5,150 <2 NA No FP,No S,Yes 0
<br /> 02/15/01 893 1972 -1079 58,200[6] 5,930 1,400 1,540 5,820 <2 1 1 No FP,No S,O=NE
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<br /> C 1ARC0121681QTRLYITABLES12168QUARTERI Y DATA XLS
<br /> 6 of 8 Delta 4125101
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