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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station #2133 <br /> 2908 Benjamin Holt Drive <br /> Stockton, California <br /> Well Depth Product Groundwater Groundwater Ethyl- Xylenes <br /> Well Date Elevation to Water Thickness Elevation Elevation TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft,MSL) (ft,TOC) (ft) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg1L) <br /> MW-5 9113100 P 868 -764 -172 <50 <0 5 <05 <0 5 <05 <2 5 241 <br /> (cont) 12/15/00 P 816 -712 052 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 0 83 <br /> 3/2101 P 610 -506 206 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 35 <br /> 5110101 P 619 -515 009 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 30 <br /> 8/22101 P 888 -784 -269 <50 <0 50 <0 50 <0 50 058 <2 5 -- <br /> 12/5/01 P 807 -703 081 82' 067 <0 50 <0 50 057 <2 5 079 <br /> 3/12/02 P 631 - -527 1 76 <50 <0 50 <0 50 <0 50 <0 50 <2 5 098 <br /> 6/6102 P 724 620 093 <50 <0 50 <0 50 <0 50 <0 50 58 0 62 <br /> 9/24/02 P 902 -798 -178 <50 0 75 <0 50 <0 50 <050 <2 5 042 <br /> 12/17/02 P 744 — -640 158 <50 <0 50 <050 <0 so <0 50 <2 0 — <br /> QCTB 9/24/02 - <50 <0 50 <0 50 <0 50 084 <25 <br /> 12/17/02 — — -- -- — -- <50 <0 50 <0 50 <0 50 <0 50 <2 0 — <br /> Notes <br /> ft=feet TPHg=Total petroleum hydrocarbons as gasoline <br /> MSL=mean sea level MtBE=Methyl tert-butyl ether <br /> TOC=top of casing DO=Dissolved oxygen <br /> ppb=parts per billion QCTB=Trip Blank <br /> mg/L=milligrams per liter <br /> P/NP=purged/not purged <br /> <=below given laboratory detection limit <br /> --=not measured or analyzed(in case of product thickness,none found) <br /> A=groundwater elevation corrected by adding 0 75 X product thickness <br /> **=Chromatogram Pattern Gasoline c6-c10 <br /> *=Hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of the requested fuel <br /> Projects/ARCO/2133/Reports/Tables/gwtables2133 As 38 <br />