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Results flagged with an asterisk (*) indicate values outside control criteria. <br />Results flagged with a pound (#) Indicate the control criteria is not applicable. <br />Percent recoveries and relative percent differences (RPD) are determined by the sofhvare usinfivoes in the calculation which have not been rounded. <br />Printed: 08/15/2007 07:41:20 Form 3A - Organic Page 1 of 1 <br />P:STEALT .CRYSrAL.RP71Form3DA4S.rpt SuperSetReference: RR13820 <br />COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc <br />Service Request: <br />P0700704 <br />Project: Foothill Landfill, San Joaquin County (New Wells)/124591 <br />Date Extracted: <br />08/08/2007 <br />Sample Matrix: Water <br />Date Analyzed: <br />08/08/2007 <br />Matrix Spike/Duplicate Matrix Spike Summary <br />Volatile Organic Compounds <br />Sample Name: MW -4 <br />Units: <br />ug/L <br />Lab Code: P0700704-001 <br />Basis: <br />NA <br />Extraction Method: EPA 5030B <br />Level: <br />Low <br />Analysis Method: 8260B <br />Extraction <br />Lot: <br />PWG0701151 <br />MW-4MS <br />MW-4DMS <br />PWG0701151-1 <br />PWG0701151-2 <br />Sample <br />matrix Spike <br />Duplicate Matrix Spike <br />%Rec <br />RPD <br />Analyte Name <br />Result <br />Result Expected <br />%Rec <br />Result Expected <br />%Rec <br />Limits <br />RPA <br />Limit <br />1,1,1 -Trichloroethane (TCA) <br />ND <br />10.7 10.0 <br />107 <br />10.2 <br />10.0 <br />102 <br />52-158 <br />5 <br />25 <br />1,1-Dichloroethane <br />ND <br />11.1 10.0 <br />111 <br />10.8 <br />10.0 <br />108 <br />59-145 <br />3 <br />25 <br />1,1-Dichloroethene <br />ND <br />11.7 10.0 <br />117 <br />11.6 <br />10.0 <br />116 <br />27-176 <br />1 <br />25 <br />1,2-Dichloroethane (EDC) <br />ND <br />9.79 10.0 <br />98 <br />9.77 <br />10.0 <br />98 <br />56-147 <br />0 <br />25 <br />1,2-Dichloropropane <br />ND <br />10.8 10.0 <br />108 <br />10.7 <br />10.0 <br />107 <br />60-139 <br />1 <br />25 <br />1,3,5-Trimethylbenzene <br />ND <br />9.78 10.0 <br />98 <br />8.00 <br />10.0 <br />80 <br />45-143 <br />20 <br />25 <br />1,3 -Dichlorobenzene <br />ND <br />10.9 10.0 <br />109 <br />10.3 <br />10.0 <br />103 <br />62-134 <br />5 <br />25 <br />Benzene <br />ND <br />11.1 10.0 <br />111 <br />10.8 <br />10.0 <br />108 <br />58-148 <br />3 <br />25 <br />Chlorobenzene <br />ND <br />11..0 10.0 <br />110 <br />10.6 <br />10.0 <br />106 <br />60-136 <br />3 <br />25 <br />Chloroform <br />ND <br />10.3 10.0 <br />103 <br />10.1 <br />10.0 <br />101 <br />60-147 <br />2 <br />25 <br />Ethylbenzene <br />ND <br />11.0 10.0 <br />110 <br />10.5 <br />10.0 <br />105 <br />50-142 <br />5 <br />25 <br />Methyl tert-Butyl Ether <br />ND <br />18.4 20.0 <br />92 <br />19.1 <br />20.0 <br />95 <br />66-136 <br />4 <br />25 <br />Tetrachloroethene (PCE) <br />ND <br />12.1 10.0 <br />121 <br />11.7 <br />10.0 <br />117 <br />27-168 <br />3 <br />25 <br />Toluene <br />ND <br />11.4 10.0 <br />114 <br />10.8 <br />10.0 <br />108 <br />56-137 <br />5 <br />25 <br />Trichloroethene (TCE) <br />ND <br />10.5 10.0 <br />105 <br />10.2 <br />10.0 <br />102 <br />42-156 <br />3 <br />25 <br />Vinyl Chloride <br />ND <br />12.0 10.0 <br />120 <br />11.7 <br />10.0 <br />117 <br />40-177 <br />3 <br />25 <br />Results flagged with an asterisk (*) indicate values outside control criteria. <br />Results flagged with a pound (#) Indicate the control criteria is not applicable. <br />Percent recoveries and relative percent differences (RPD) are determined by the sofhvare usinfivoes in the calculation which have not been rounded. <br />Printed: 08/15/2007 07:41:20 Form 3A - Organic Page 1 of 1 <br />P:STEALT .CRYSrAL.RP71Form3DA4S.rpt SuperSetReference: RR13820 <br />