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<br /> HISTORICAL GROUNDWATER MONITORING DATA
<br /> Y
<br /> Former ARCO Service Station No 2168
<br /> 441 Charter Way
<br /> Stockton,California
<br /> Elevation
<br /> Top of Static Water Water Depth to Ethyl- Total Dissolved
<br /> Well ID Casing(feet Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MTBE Oxygen
<br /> &Sample Date msl) (feet bgs) (feet ms1) (feet bgs) lig/L pg/L pg/L pg/L pg/L pg/L (ppm) Observations
<br /> MW-5 39 2/16/95 928 3578 -2650 370 180,000 8,500 15,000 2,200 12,000 NA NA No FP,No S,O=NE
<br /> 55 5117/95 3123 -2195 22,000 3,400 2,100 390 2,400 NA NA No FP,No S,O=NE
<br /> 55 8115195 3083 -2155 32,000 4,200 3,500 410 2,500 NA NA No FP,No S,Yes O
<br /> 55 11/29/95 3100 -21 72 52,000 8 300 8,100 810 4,100 NA NA No FP,No S,Yes 0
<br /> 2/27/96 28 19 -1891 20,000 3,200 1,900 440 1,800 NA NA No FP,No S,Yes 0
<br /> 55 5115/96 2666 -1738 43,000 6,500 5,000 790 3,400 <500*[l] NA No FP,No S,Yes O
<br /> 8122/96 27 14 -1786 58,000 8,700 8,200 880 4,500 <500*[i] NA No FP,No S,Yes O
<br /> 11/25/96 2733 1805 53,000 7,000 6,100 800 4,000 <600**]1] NA No FP,No S,Yes O
<br /> 2/24!97 2330 -1402 40,000 4,400 4,700 590 3,100 <700**[1] NA No FP,No S,Yes 0
<br /> 5119197 2321 -13 93 43,000 5,500 4,300 660 3,800 <300*[1] NA No FP,No S,Yes O
<br /> 54 8121/97 2429 -1501 32 000 5,200 3,900 560 3,100 <1000[1]** NA No 1'P,No S,Yes O
<br /> 55 11/17/97 25 33 -3605 10,000 1,700 1,300 210 1,100 <500**[1] NA No FP,No S,Yes 0
<br /> 55 2/9/98 2262 -1334 4,700 740 520 110 520 <25**[1] NA No FP,No S,Yes O
<br /> 54 5121/98 1876 948 1,380 167 148 264 125 <100 NA No FP,No S,Yes 0
<br /> 54 8112198 1996 -1068 2 450 472 250 642 284 <20 NA No FP,No S,Yes 0
<br /> 54 1119/98 2009 -1081 13,800 2,490 1,890 337 1,640 <2 NA No FP,No S,Yes 0
<br /> 54 2117/99 1926 -99$ 3,130 438 285 864 386 <2 NA No FP,No S,Yes 0
<br /> 54 5125199 1865 -937 11,800 2,060 1,060 <100 1,380 <2 NA No FP,No S,Yes 0
<br /> 54 8118/99 1980 1052 34,400 23,800 1,130 342 1,500 <2 NA No FP,No S,Yes 0
<br /> 54 12/17/99[2] 2063 -1135 <50 336 0 616 0 565 204 <2 NA No FP,No S,O=NE
<br /> 54 02/22/00[3] 1942 -1014 3,280 942 169 134 415 <2 NA No FP,No S,Yes 0
<br /> 55 6/22/00 1858 -930 1,170 170 39 31 106 <2 NA No FP,No S,Yes 0
<br /> 8130100 1962 -1034 32,800 3,460 2,970 664 4,010 <2 NA No FP,No S,Yes O
<br /> 11121/00 2037 -11 09 1,920[4] 391 36 1 744 233 <2 NA No FP,No S,Yes 0
<br /> 2/15101 2042 -11 14 357[6] 269 5 19 487 175 <2 09 No FP,No S,O=NE
<br /> 5/17101 1965 -1037 1,300[5] 239 196 383 878 <2 1 1 No FP,No S,Yes 0
<br /> 8116101 2100 -1 l 72 3,400 540 42 43 230 <2 26 No FP,No S,Yes O
<br /> 1216101 2195 -1267 1,400 230 20 44 99 <5 0* 12 No FP,No S,Yes 0
<br /> 2114/02 2049 -1121 1,300 180 23 48 75 <0 50 1 5 No FP,No S,Yes 0
<br /> 6113102 2078 -1150 1,700 200 16 51 91 <l 0[10] 08 No FP,No S,Yes 0
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<br /> Aiw_2168_Quartcr1y_Data xis
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