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i • i <br /> Page 3 of 3 <br /> Table 2 <br /> Groundwater Elevation and Analytical Data <br /> Former ARCO Service Station#4932 <br /> 16 E Harding Way,Stockton,CA <br /> Well Depth Groundwater SPH Groundwater Ethyl- Xylenes MtBE <br /> Well Date Elevation to Water Elevation Thickness Elevation TPHg Benzene Toluene benzene (total) (8020/8260) DO <br /> Number Sampled (ft MSL) (ft TOC) (ft,MSL) 01) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mglL) <br /> SVE 1 9/5/00 P 11 84 2645 1447 0 00 - 66 600 1 770 8 000 2 550 12 900 1 140" - <br /> 1112/00 P 2711 1513 0 00 066 4 750 152 469 164 823 212/1 200 2 8 <br /> 3/5/01 P 2640 1456 0 00 0,97 72 300 2090 10,100 2 710 14 800 12 10013,720 51 <br /> 518/01 P 2604 1420 0 00 0 36 45 300 1 560 5 170 1 850 9 490 6 900/4 930 0 31 <br /> 7/20/01 P 2749 15 64 ' 0 01 -1 44 Not sampled 0 01 ft LPH present <br /> 10/22/01 P 28 93 1708 ' 0 01 -1 44 Not sampled 001 ft LPH present <br /> 01/15/02 - - - - Not sampled well dry <br /> 04/11/02 NP 2788 1604 0 00 1 04 87,000 5,200 16 000 3 900 20 000 20,000/19,000 3 0 <br /> 07/12/02 NP 28 98 -1714 000 -110 85,000 4,100 8,900 3,700 18,000 13,000115,000 2 2 <br /> DMW-1 4/11/02 P 11 98 2810 1612 0 00 - <500 9 6 <5 0 <5 0 <5 0 230/140 — <br /> 07/12/02 P 2925 -17 27 000 -1 15 55 <0 50 <0 50 <0 50 <0 50 72164 2 7 <br /> DMW-2 07/12/02 P 1110 2836 -1726 000 — <50 1 0 1 6 062 2 0 1318 5 2 8 <br /> DMW-3 07!12102 P 1149 28 94 -174S 000 — 90" <0 50 1 3 <0 50 1 0 160/140 2 7 <br /> EW 1 4/11102 P 11 83 2795 1612 0 00 - <200,000 9,900 40 000 4 700 24 000 550 000/520 000 <br /> 07/12/02 P 2904 -1721 000 -109 350,000 13,000 49,000 6,100 34,000 320,000/460,000 2 7 <br /> EW-2 07!12102 P 1122 2851 -17 29 000 — <50,000 <500 <500 <500 <500 56,000165,000 2 8 <br /> QCTB 07!12102 -- — — -- — <50 <0 50 <0 50 <0 50 <0 50 <2 5 -- <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline ppb=parts per billion <br /> MtBE=Methyl tertiary butyl ether mg/L=milligrams per Iter <br /> DO=Dissolved oxygen PINP=purged/noi purged <br /> LPN=liquid phase hydrocarbon 8020=analyzed by EPA Method S020 <br /> ft=feet 8260=analyzed by EPA Method 8260 <br /> MSL=mean sea level <=below given laboratory detection limit <br /> TOC=top of casing <br /> =analyzed using EPA Method 8260 <br /> "=Hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of the requested fuel <br /> '=groundwater elevation corrected by adding 0 77 X product thickness <br /> =not measured or analyzed <br /> Project/ARCO/4932/Reports/Tableslgwtables4932 xls <br />