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1 <br /> TPH-g and BTEX compounds were not detected in MW-9 TPH-g,BTEX, and MTBE were not found in <br /> the holding tank sample(H-Tank) Benzene and ethylbenzene were detected in the equipment blank water <br /> sample (EB-1) This detection is likely due to cross contamination <br /> Table 3-2 <br />' Organic Analytical Results <br /> San Joaquin County Human Services Agency <br /> September 2004 <br />' itesWts presented in micrograms per Mer(uglL) <br /> Well Groundwater Benzene Toluene Ethylbenzene Xylene TPH-g <br />' Elevation (total) <br /> (feet MSL) <br />' MW-2 NM 11,000 ND 440 470 22,000 <br /> MW-2A 2010 13 23 49 48 1,400 <br /> MW-3A -2010 NM NM NM NM NM <br /> MW-4 -1938 NM NM NM NM NM <br /> MW-5 -1803 NM NM NM NM NM <br /> MW-6 -1983 NM NM NM NM NM <br /> MW-7 -2061 NM NM NM NM NM <br /> MW-9 -2010 ND ND ND ND ND <br /> EB-1 NA 15 ND 053 ND ND <br />' NA Non applicable <br /> ND(0 5) Analyte not detected,detection hunt indicated in parentheses <br /> NM Not measured <br />' 4.0 CONCLUSIONS <br />' Since the last sampling event of June 2004,concentrations of benzene,toluene,and ethylbenzene have fallen <br /> slightly in well MW-2A,although xylene was detected in third quarter sampling and was not found in the last <br /> dataset Concentrations of all analytes found in MW-2 have fluctuated slightly when compared to the last <br />' <br /> dataset These concentrations are consistent with historic concentrations found in previous sampling events <br /> No contaminants of concern were detected in the upgradient well (MW-9) <br /> 4 <br />