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Oj <br /> Page 2 of 2 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former ARCO Service Station#4932 <br /> 16 E.Harding Way,Stockton,CA <br /> Well Depth Groundwater Groundwater Ethyl- Xylenes <br /> Well Date Elevation to Water Elevation Elevation TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft,MSL) (ft,TOC) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> MW-9 7120101 P 11.24 26.49 -15.25 — 200 1.2 0.56 <0.50 1.7 2.81¢2.0' -- <br /> SVE-1 915100 P 11.84 26.45 -14.47 -- 66,600 1,770 8,000 2,550 12,900 1,140- <br /> 111/2/00 P 27,11 -15.13 -0.66 4,750 152 469 164 823 212/1,200' 2.8 <br /> 3/5/01 P 26.40 -14.56 0.57 72,300 2,090 10,100 2,710 14,800 12,10013,720` 5.1 <br /> 5/8101 P 26.04 -14.20 0.36 45,300 1,560 5,170 1,850 9,490 6,90014,930` 0.31 <br /> 7/20101 P 27.49 -15.65 -1.45 Not sampled:0.01 ft free product present <br /> Notes: <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> MtBE=Methyl tert-butyl ether <br /> DO=Dissolved oxygen <br /> ft=feet <br /> MSL=mean sea level <br /> TOC=top of casing <br /> ppb=parts per billion <br /> mg/L=milligrams per liter <br /> PIMP=purged/not purged <br /> <=below given laboratory detection limit <br /> =not measured or analyzed <br /> I, <br />