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<br /> ' 8015B, 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 third quarter
<br /> ' 2005 on July 26,August 31,and October 7, 2005
<br /> Gross range organics (GRO),the TPHg equivalent,were detected in the influent vapor samples collected on
<br /> ' July 26, August 31, and October 7, 2005 at concentrations of 22 parts per million by volume (ppmv), 110
<br /> ppmv, and 39 ppmv, respectively Benzene was detected in the influent vapor samples collected on July 26,
<br /> August 31, and October 7, 2005 at concentrations of 0 25 ppmv, 0 75 ppmv, and 0 38 ppmv, respectively
<br /> Toluene was detected in the influent vapor samples collected on July 26,August 31, and October 7, 2005 at
<br /> concentrations of 0 28 ppmv, 12 ppmv, and 0 42 ppmv, respectively Ethylbenzene was detected in the
<br /> influent vapor samples collected on July 26, August 31, and October 7, 2005 at concentrations of 0 45
<br /> ' ppmv, 14 ppmv, and 0 15 ppmv, respectively Total xylenes were detected in the influent vapor samples
<br /> collected on July 26, August 31, and October 7, 2005 at concentrations of 4 4 ppmv, 17 9 ppmv, and 0 79
<br /> ppmv, respectively MTBE, TBA, TAME, ETBE, DIPE, 1,2-DCA, and EDB were not detected in the
<br /> ' influent vapor samples collected on July 26, August 31, and October 7, 2005
<br /> GRO was detected in the effluent sample collected on October 7, 2005 at a concentration of 12 ppmv
<br /> ' Toluene was detected in the effluent samples collected on August 31 and October 7, 2005 at concentrations
<br /> of 0 069 ppmv and 0 18 ppmv, respectively Ethylbenzene was detected in the effluent sample collected on
<br /> October 7, 2005 at a concentration of 0 24 ppmv Total xylenes were detected in the effluent samples on
<br /> July 26 and October 7, 2005 at concentrations of 0 081 ppmv and 1 38 ppmv, respectively MTBE, TBA,
<br /> TAME, ETBE, DIPE, 1,2-DCA, and EDB were not detected in the effluent vapor samples collected on
<br /> July 26, August 31, and October 7,2005
<br /> 1 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 third quarter 2005 on July 26,August 31,and September
<br /> 27, 2005 On October 7, 2005, ATC personnel collected a water sample from the effluent port of the
<br /> treatment and discharge component of the vapor extraction system for compliance requirements
<br /> ' established by the DMU associated with the discharge of treated water Into the sanitary sewer
<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 July 26, August 31, and September 27, 2005
<br /> 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 /> i
<br /> Air Sparge System Monitoring
<br /> 1 The air sparge system operated continuously from June 29 to October 7,2005 �
<br /> s lemuo1625961quart1yl3gr-2005 doc 6 ATC ASSOCIATES INC
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