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pX Alpha Scientific Corporation <br />'"/ Environmental Laboratories <br />EPA 8260B <br />Batch QA/QC Report <br />Client: Environmental Applications <br />Project: 0710-01 <br />Matrix: Soil <br />Batch No: 1206-VOBS 1 <br />I. MS/MSD Report <br />Unit: ppb <br />Lab Job No <br />Lab Sample ID: <br />Date Analyzed: <br />12-06-2007 <br />Q712016 <br />Q712016-13 <br />12-06-2007 <br />Analyte <br />Sample <br />Spike <br />MS <br />MSD <br />MS <br />MSD <br />% RPD <br />%RPD <br />%Rec <br />Benzene <br />Cone. <br />Cone. <br />100.4 <br />80-120 <br />%Rec. <br />%Rec. <br />50.0 <br />Accept. <br />Accept. <br />Toluene <br />51.2 <br />50.0 <br />102.4 <br />80-120 <br />Chlorobenzene <br />50.0 1 <br />50.0 <br />Limit <br />Limit <br />1,1- <br />ND <br />20 <br />20.7 <br />20.6 <br />103.5 <br />103.0 <br />0.5 <br />30 <br />70-130 <br />Dichloroethene <br />Benzene <br />ND <br />20 <br />19.6 <br />20.7 <br />98.0 <br />103.5 <br />5.5 <br />30 <br />70-130 <br />Trichloro- <br />ND <br />20 <br />19.4 <br />20.9 <br />97.0 <br />104.5 <br />7.4 <br />30 <br />70-130 <br />ethene <br />Toluene <br />ND <br />20 <br />20.1 <br />20.3 <br />100.5 <br />101.5 <br />1.0 <br />30 <br />70-130 <br />Chlorobenzene <br />ND <br />1 20 <br />1 19.7 <br />19.2 <br />1 98.5 <br />96.0 <br />1 2.6 <br />30 <br />70-130 <br />II. LCS Result <br />Unit: ppb <br />Analyte <br />LCS Value <br />True Value <br />Rec.% <br />Accept. Limit <br />1,1-Dichloroethene <br />50.1 <br />50.0 <br />100.2 <br />80-120 <br />Benzene <br />50.2 <br />50.0 <br />100.4 <br />80-120 <br />Trichloro-ethene <br />52.8 <br />50.0 <br />105.6 <br />80-120 <br />Toluene <br />51.2 <br />50.0 <br />102.4 <br />80-120 <br />Chlorobenzene <br />50.0 1 <br />50.0 <br />100.0 <br />80-120 <br />ND: Not Detected. <br />16760 Gridley Road, Cerritos, CA 90703 15 Phone: (562) 809-8880 Fax: (562) 809-8801 <br />