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Page 1 of 1 <br /> Table 4 <br /> Domestic Well Analytical Data <br /> ARCO Service Station#595 <br /> 6100 N Highway 99,Stockton, CA <br /> Ethyl Xylenes <br /> Well Date TPHg Benzene Toluene benzene (total) MtBE <br /> Number Sampled (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> DW-1 2/1/2002 <50 <0 50 <0 50 <0 50 <0 50 <2 5<0 50 <br /> 4/11/2002 -----------------------------------Not Sampled------------------------------------- <br /> 7/16/2002 ------------------------------------Not Sampled------------------------------------ <br /> 10/2/2002 ------------------------------------Not Sampled------------------------------------ <br /> 1/17/2003 -----------------------------------Not Sampled----------------------------------- <br /> 4/4/2003 ---------------------------------Not Sampled------------------------------------ <br /> 7/22/2003 ------------------------------------Not Sampled------------------------------------- <br /> 10/1/2003 -----------------------------Not Sampled-------- ----------------_ <br /> DW-2 2/1/2002 <50 <0 50 <0 50 <0 50 <0 50 <2 5/<0 50 <br /> 4/11/2002 <50 <0 50 <0 50 <0 50 <0 50 <2 5/<0 50 <br /> 7/16/2002 <50 <0 50 <0 50 <0 50 <0 50 <2 51<0 50 <br /> 10/2/2002 <50 <0 50 <0 50 <0 50 <0 50 <2 51<0 50 <br /> 1/17/2003 <50 <0 50 <0 50 <0 50 <0 50 <2 5/<0 50 <br /> 4/4/2003 <50 <0 50 <0 50 <0 50 <0 50 --<0 50 <br /> 7/22/2003 <50 <0 50 <0 50 <0 50 <0 50 --<0 50 <br /> 10/2/2003 <50(a,b) <0 50(a) <0 50(a) <0 50(a) <0 50(a) --<0 50(a) <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> MtBE=Methyl tert-butyl ether by EPA Method 8020/8260 <br /> DW=Domestic Well <br /> ppb=parts per billion <br /> <=below given laboratory detection limit <br /> (a)Samples analyzed past hold time,results may still be used for their intended purpose <br /> (b)Laboratory reports sample result with a possible high bias due to the continuing calibration verification <br /> falling outside acceptance criteria <br /> ProlectslARC015951ReportslTableslgwtables595-DW1 and DW-2 As <br />