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Page 4 of 4 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Fortner ARCO Service Station#4932 <br /> 16 E.Harding Way,Atockton,CA <br /> Well Depth Groundwater 1PFt Groundwater Ethyl- Xylenes MtBE <br /> Weil Date Elevation to Water Elevation Thickness Elevation TPHg Benzene, Toluene benzene .. (total) (602018260) DO: <br /> �.Numbw Sampled (ffMqL), {t,TOS.. _ ttt,IM <br /> SL} (ft) Chariga,�ft} .. . (PPb) {PPbI (pPb}. ....(ppb), _ (PPb) -- -(pPb} (m91-) <br /> EW-1 4111/02 P 11.83 27.95 -16.12 0.00 -- <200,000 9,900 40,000 4,700 24,000 550,0001520,000 -- <br /> 07/12/02 P 29.04 -17.21 0.00 -1.09 350,000 13,000 49,000 6,100 34,000 320,0001460,000 2.7 <br /> 11/21102 NP 31.47 -19.64 0.00 -2,43 Not sampled:LPH sheen present <br /> EW-2 07/12/02 P 11.22 28.51 -17.29 0.00 — <50,000 <500 <500 <500 <500 56,000165,000 2.8 <br /> 11/20/02 P 31.20 -19.98 0.00 -2.69 45,1X10 <100 <100 <100 <100 71,000190,000' 0.00-0.03 <br /> EW-8 11/20/02 P N5 31.07 — 0.00 — 28,000 390 1,500 1,200 6,200 440/280 0.43 <br /> QCTB 11/21102 — — — -- — <50 <0.50 <0.50 <0.50 <0.50 <2.5 — <br /> Notes: <br /> TPH9=Total petroleum hydrocarbons as gasoline ppb=parts per billion <br /> MtBE=Methyl tertiary butyl ether mg/L=milligrams Per liter <br /> DO=Dissolved oxygen PfNP=purged/not purged <br /> LPH=liquid phase hydrocarbon 8020=analyzed by EPA Method 8020 <br /> ft=feet 8260=analyzed by EPA Method 8260 <br /> MSL=mean sea level <=below given laboratory detection limit <br /> TOC=top of casing NS=not surveyed <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 /> Z=Discrete peak @ C6-C7 <br /> 3=This sample was analyzed beyond the EPA recommended holding time. The results may still be useful for their intended purpose. <br /> "=The concentration indicated for this analyte is an estimated value above the calibration range of the instrument. <br /> =not measured or analyzed <br /> ProjecV932IReportsfTables/gwtables4932.xis . . <br />