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Table 2 <br /> Groundwater Elevation and Analytical Data(ARCO) <br /> ARCO Service Station p 2133 <br /> 2906 West Benjamin Holt Drive - <br /> Stockton,California <br /> Well Depth Product Groundwater Groundwater Ethyl- Total <br /> Well Date Elevation to Water Thickness Elevation Elevation TPHg Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled Notes (ft,M5L) ii TOC) (tt) Ott,MSL) Change(tt) (ug") (ug1l) (uglq (uglq lugfl) (ugfp (mg1L) <br /> 3119/1997 P 7.18 -- -6.14 4.45 1,400 26 5.6 4.6 9.8 - 0.1 <br /> 61511997 P 8.84 - -7.80 -1.66 1,900 22 5.1 4 14 <10 0,2 <br /> I <br /> 811911997 NP 10.25 - -9.21 •1.41 <50 <0.5 -0.5 <0.5 <0.5 <5 0.2 <br /> 1112"997 NP 10.48 - -9.44 •0.23 210 <0.5 <0.5 <0.5 <0.5 <5 -- <br /> MW-5 3!2011998 P 4.27 - -3.23 6.21 <50 <0.5 <0.5 <0.5 <0.5 <5 2.2 <br /> (cont.) 612411998 Well box inaccessible <br /> 9110/1998 P 7.79 -- -6.75 -- <50 <0.5 <0,5 <0.5 <0.5 <5 - <br /> 12117/1998 P 8.06 - -7.D2 -0.27 99.5 <0.5 <0.5 <0.5 <0.6 <5 - <br /> 3110M999 P 5.86 - -4.82 2.20 60.6 <0.5 <0.5 <0.5 <0.5 <5 2.8 <br /> &22)1999 Well box inaccessible <br /> 911311999 Well box inaccessible <br /> 1211611999 P 9.25 -8.21 - 186 0.96 <0.5 <0.5 1.03 -2.5 3.3 <br /> 312312000 P 4.61 -3.57 4.64 355 0.620 <0.5 <0.5 1.28 -2.5 2.0 <br /> 6/2112000 P 6.96 -- -5.92 -2.35 <50 <D.5 -0.5 <0.5 <0.5 <2.5 0.2 <br /> 9/1312000 P 8.68 -- -7.64 -1.72 <50 <0.5 <0.5 <0.5 <0.5 -2.5 2.41 <br /> 12/1512000 P 8.16 -7.12 0.52 <50.0 -0.500 <0.500 <0.500 -0.500 <2.50 0.83 <br /> 3121200t P 6.10 -5.06 2.06 <50.0 -0.500 <0.500 <0.5D0 -0.500 <2.50 3.5 <br /> 5/10/2001 P 6.19 -- -5.15 •0.09 -50.0 <0.500 -0.500 -0.500 <0.500 <2.50 3.0 <br /> 812212001 P 8.68 - -7,84 -2.69 -50 c0.50 -0.50 -0.50 0.58 <2.5 - <br /> 1215f2001 P 8.07 -- -7.03 0.81 82" 0.67 -0.50 -0.50 057 '<2.5 0.79 <br /> 3/1212002 P 6.31 - -5.27 1.76 <50 <0.50 -0.50 -0.50 <0.50 <2.5 0.98 <br /> 616/2002 P 7.24 - •6.20 -0.93 <50 <0.50 -13.50 <0.50 <0.50 5.8 0.62 <br /> 912412002 P 9.02 - •7.98 -1,76 <50 0.75 -0.50 <0.50 <0.50 -2.5 0.42 <br /> 12/1712002 P 7.44 -- -6.40 1.58 <50 <0.50 -0.50 <0.50 <D.50 -2.0 - <br /> 3/1812003 P 7.23 -- -6.19 0.21 <50 <0.50 -0.50 <13,50 -0.50 <2.5 1.58 <br /> �. 6/1712003 P 7.45 W -6.41 -0.22 -50 -0.50 -0.50 <0.50 -0.50 <2.5 0.00 <br /> 912412003 a P 9.19 -8.15 -1.74 -25,000 -250 380 <250 -250 -250 0.31 <br /> 12/1812003 8.56 - -7.54 0.61 - - -- _ » - <br /> W612004 P 6.45 - -5.41 2.13 <50 <0.50 <0.50 <0.50 <0.50 <0.50 -- <br /> 6/22/2004 8.44 - -7.40 -2.25 - - -- -- _ .. _- <br /> 912112004 9,45 - -8.41 -0.57 <br /> 12/28/2004 6,15 - -7.11 -0.08 <br /> W12005 5.26 4.22 1.05 -50 <0.50 -0.50 -0.50 <0.50 -0.50 3.4 <br /> Notes: <br /> ft=feet TPI-Ig=Total petroleum hydrocarbons as gasoline <br /> M51.=mean sea level MTBE a Methyl tart-busy!ether <br /> TOG=top of casing DO=Dissolved oxygen <br /> ugll=Micrograms peril OCTB=Trip Blank <br /> m91L=milligrams per liter <br /> P1NP=purgedlnot purged <br /> -=below given laboratory detection limit <br /> - v not measured or analyzed(in case of product thickness,none found) <br /> "=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 /> a=sample was analyzed using EPA Method 8260 <br /> b=Laboratory reports that this sample may be biased high due to carryover from the provious sample <br /> i;i B P-ARC 052133 iTa b I est gwta ble s 2133.xl s <br /> 24 of 24 <br />