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• 0 0 21 of 21 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd,Tracy,CA <br /> Well Depth Groundwater Groundwater Product Ethyl- Xylenes <br /> Well Date Elevation to Water Elevation Elevation Thickness TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft,MSL) (ft,TOC) (ft MSL) Change(ft) (ft) (ug/L) (ug/L) (ug/L) (ug1L) (ug/L) (ug/L) (mg/L) <br /> T EX-1 12/21/2000 11 88 -- <br /> (cont) 3/27/2001 1134 054 <br /> 6/20/2001 1153 -019 - <br /> 9/12/2001 1162 -009 <br /> 12/19/2001 1142 020 -- -- <br /> 3114l2002 1145 -003 -- -- <br /> 6/28/2002 1167 - -022 -- <br /> 9/11l2002 1164 003 - -- - - <br /> 12117/2002 1096 068 -- -- - <br /> 313112003` 1140 -• -044 "" '" -- _ "- <br /> TB-1 12/19/2001 - - <50 <0 50 <0 50 <0 50 <0 50 <br /> QTCB 3/14/2002 -- -- <60 <0 50 <0 50 <0 50 <0 50 - <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> MtBE=Methyl tert butyl ether <br /> 00=Dissolved oxygen <br /> ft=feet <br /> MSL=mean sea level <br /> TOC=top of casing <br /> ug/L=micrograms per liter <br /> mg1L=milligrams per liter <br /> PINP purged/not purged <br /> TB 1 =Trip Blank <br /> *=analyzed using EPA Method 8260B <br /> A=groundwater elevation corrected by adding 0 77 X product thickness <br /> <=below given laboratory detection limit <br /> --=not measured or analyzed(in case of product thickness,none found) <br /> (a)=top of casing altered and casing not resurveyed,water-level measured from highest point of casing <br /> '=Hydrocarbon pattern is present in the requested fuel quantitation range but not resemble the pattern of the requested fuel <br /> Beginning 2nd quarter 2002,the analytical data validation is summarized in the text <br /> I <br /> K 1WprooessU5 8P AR001020931QuarterlyAi QTR 0312093 GWMFl1003 <br />