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' 801513, BTEX by EPA Method 8021B, and MTBE, TAME, ETBE, DIPE, TBA, 1,2-DCA, and EDB by
<br /> EPA Method 8260B
<br /> Vapor Analytical Results
<br /> ' Influent and effluent vapor samples were collected from the vapor extraction system during the fourth
<br /> quarter 2005 on October 28 and November 21, 2005 Influent and effluent vapor samples were not
<br /> collected from the vapor extraction system on December 27, 2005, since the system had shut down due to a
<br /> system malfunction
<br /> Gross range organics(GRO), the TPHg equivalent,were detected in the influent vapor samples collected on
<br /> October 28 and November 21, 2005, at concentrations of 9 parts per million by volume (ppmv) and 50
<br /> ppmv, respectively Benzene was detected In the Influent vapor samples collected on October 28 and
<br /> November 21, 2005,at concentrations of 0 072 ppmv and 0 60 ppmv, respectively Toluene was detected in
<br /> the influent vapor samples collected on October 28 and November 21, 2005, at concentrations of 0 097
<br /> ' ppmv and 0 59 ppmv, respectively Ethylbenzene was detected In the influent vapor samples collected on
<br /> October 28 and November 21, 2005, at concentrations of 0 062 ppmv and 0 19 ppmv, respectively Total
<br /> xylenes were detected In the Influent vapor samples collected on October 28 and November 21, 2005, at
<br /> ' concentrations of 0 43 ppmv and 101 ppmv, respectively MTBE, TBA, TAME, ETBE, DIPE, 1,2-DCA,
<br /> and EDB were not detected In the Influent vapor samples collected on October 28 and November 21,2005
<br /> ' GRO was detected In the effluent sample collected on November 21, 2005, at a concentration of 6 ppmv
<br /> Toluene was detected In the effluent sample collected on November 21, 2005, at a concentration of 0 13
<br /> ppmv Total xylenes were detected in the effluent sample on November 21,2005, at a concentration of 0 67
<br /> ppmv MTBE, TBA, TAME, ETBE, DIPE, 1,2-DCA, and EDB were not detected In the effluent vapor
<br /> samples collected on November 21, 2005 None of the analytes of Interest were detected in the vapor
<br /> sample collected on October 28, 2005
<br /> A summary of vapor analytical data is provided In Table 4 Groundwater laboratory data sheets and chain-
<br /> of-custody documentation are contained in Attachment 4
<br /> ' Water Treatment System Analytical Results
<br /> The Influent, vessel 1, and effluent water samples from the treatment and discharge component of the
<br /> vapor extraction system were sampled during the fourth quarter 2005 on October 28, November 21, and
<br /> December 27, 2005
<br /> TPHg, BTEX, MTBE, TBA, TAME, ETBE, DIPE, 1,2-DCA, and EDB were not detected in any of the
<br /> Influent, vessel 1, and effluent water samples collected on October 28, November 21, and December 27,
<br /> 2005,from the treatment and discharge component of the vapor extraction system
<br /> ' A summary of analytical results Is presented In Table 5 Groundwater laboratory data sheets and chain-
<br /> of-custody documentation are contained In Attachment 2
<br /> ' Air Sparge System Monitoring
<br /> The air sparge system operated continuously from October 7 to November 21, 2005 On December 27,
<br /> 2005, a cracked "T"point was observed in association with the air sparge system piping Subsequently the
<br /> air sparge system was shut off untl l the part could be replaced
<br /> s lenviro1625961quari1yAgr-2005 doc 6 ATC ASSOCIATES INC
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