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Alpha Scientific Corporation <br /> Environmental Laboratories <br /> � 1 <br /> 10-06-2006 <br /> EPA Method 8260B <br /> Batch QA/QC Report <br /> Client: Biophysics Environmental Assessment Lab Job No: BE609158 <br /> Project: Frontier Trucking/Tracy <br /> Matrix: Water Lab Sample ID: BE609158- 16 <br /> Batch No: 1003-VOEW 1 Date Analyzed: 10-03-2006 <br /> L MS/MSD Report <br /> Unit: ppb <br /> Compound Sample Spike MS MSD MS MSD % RPD %RPD %Rec <br /> Cone. Cone. %Rec. %Rec. Accept. Accept. <br /> Limit Limit <br /> _ 151 - ND 20 17.8 18 .5 89.0 92.5 3 .9 30 70- 130 <br /> lDichloroethene <br /> Benzene ND 20 233 22.4 1 116.5 112.0 3 .9 30 70- 130 <br /> Trichloro- ND 20 24. 1 22.9 120.5 114.5 5 . 1 30 70-130 <br /> ethene <br /> Toluene ND 20 253 23 .7 126.5 118.5 6.5 30 70- 130 <br /> - -� Chlorobenzene ND 20 22.9 23 .6 114.5 118 .0 3 .0 1 30 70- 130 <br /> _ I II. LCS Result <br /> Unit: ppb <br /> Compound LCS Report Value True Value Rec.% Accept. Limit <br /> 1 , 1 -Dichloroethene 52.5 50 105.0 80- 120 <br /> Benzene 54.5 50 109.0 80- 120 <br /> i <br /> Trichloro-ethene 58.4 50 116.8 80- 120 <br /> f Toluene 57.3 50 114.6 80-120 <br /> Chlorobenzene 59.3 1 50 1 118.6 1 80- 120 <br /> ND : Not Detected (at the specified limit) <br /> 16760 Gridley Road, Cerritos, CA 90703 12 Phone: (562) 809-8880 Fax: (562) 809-8801 <br /> I <br />