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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 21112002 <50 <0 50 <0 50 <0 50 <0 50 <2 5<0 50 <br /> - ------------------ <br /> 4/11/2002 ------"---"—"""''"----------Not Sampled------------------ <br /> - Not Sampled--------------------------------- <br /> 7/16/2002 ---_------------------- ---__ <br /> 10/2/2002 —----------—-----------Not Sampled------------------------------ <br /> 1/17/2003 ---—-------Not Sampled---- -----------_ <br /> 4/4/2003 ----------------------Not <br /> Sampled----------------------- ---- <br /> 7122l2003 ---'--------"— <br /> 10/1/2003 ' <br /> ------------Nat Sampled--------------------._--_— <br /> -- Not Sampled--------------------- <br /> _--.--_---_.___�_ __� _ <br /> 1/7/2004 _�__—__----------------- -Not Sampled------------------------— <br /> 4/2/2004 Not Sampled----------------------- <br /> 7!2l2004 �--__.-�..._..._.�.�--_Not Sampled-------------------------------- <br /> DW-2 2!112002 <50 <0 50 <0 50 <0 50 <0 50 <2 51<0 50 <br /> 4/11/2002 <50 <0 50 <0 50 <0 50 <0 50 <2 51<0 50 <br /> 7/1612002 <50 <0 50 <0 50 <0 50 <0 50 <2 51<0 50 <br /> 1012!2002 <50 <0 50 <0 50 <0 50 <0 50 <2 5/<0 50 <br /> 1/17/2003 <50 <0 50 <0 50 <0 50 <0 50 <2 51<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 /> 1!712004 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 412!2004 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 712/2004 <50 <0 50 <0 50 4050 <0 50 <0 50 <br /> Notes <br /> TPHg=Total oetroleum hydrocarbons as gasoline <br /> MtBE=Methyl tert-butyl ether by EPA Method 8020/6260 <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 venlication <br /> falling outside acceptance criteria <br /> Prolects\ARCO15951Reports\Tables13Q04-gwtables595-DW1 and DW-2 As <br />