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PRECISION <br /> ' ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Wednesday,March 2,2005 <br /> Attention: Francis X. Bean <br /> Kleinfelder,Inc. Report Page 17 oft! <br /> 2825 East Myrtle Street <br /> Stockton, CA 95205 <br /> ' Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AC50116-Volatiles <br /> ' Reference(AC50116-SRMI) Prepared&Analyzed:01-Mar-05 <br /> 1,2-Dichlorobenzene 44.0 2.00 ug/kg 40.0 110 60-120 <br /> 1,3-Dichlorobenzene 31.0 2.00 40.0 78 60-120 <br /> ' 1,4-Dichlorobenzene 31.2 2.00 " 40.0 78 60-120 <br /> Dichlorodifluoromethane 43.0 2.00 40.0 108 60-120 <br /> 1,1-Dichloroethane 39.0 2.00 40.0 98 60-120 <br /> 1,2-Dichloroethane 24.7 2.00 40.0 62 60-120 <br /> ' 1,1-Dichloroethene 38.0 2.00 „ 40.0 95 60-120 <br /> cis-1,2-Dichloroethene 38.0 2.00 40.0 95 0-120 <br /> trans-l,2-Dichloroethene 40.0 2.00 40.0 100 60-120 <br /> 1,2-Dichloropropane 45.0 2.00 40.0 Ill 60-120 <br /> 1,3-Dichloropropane 41.0 2.00 40.0 102 60-120 <br /> 2,2-Dichloropropane 43.0 2.00 40.0 108 60-120 <br /> I,l-Dichloropropene 40.0 2.00 40.0 100 60-120 <br /> ' cis-1,3-Dichloropropene 42.0 2.00 „ 40.0 105 60-120 <br /> trans-1,3-Dichloropropene 42.0 2.00 40.0 105 60-120 <br /> Ethylbenzene 47.0 2.00 40.0 118 60-120 <br /> Freon 113 44.0 2.00 40.0 110 60-120 <br /> ' Hexachlorobutadiene 40.1 2.00 11 40.0 100 60-120 <br /> 2-Hexanone 45.0 50.0 40.0 112 60-120 <br /> Isopropylbenzene 47.0 2.00 40.0 118 60-120 <br /> p-Isopropyltoluene 40.0 2.00 40.0 100 60-120 <br /> ' Methylene chloride 48.0 2.00 11 40.0 120 60-120 <br /> Methyl tert-butyl ether 42.0 2.00 40.0 105 60-120 <br /> Naphthalene 46.5 2.00 40.0 116 60-120 <br /> n-Propylbenzene 47.0 2.00 40.0 118 60-120 <br /> ' Styrene 36.6 2.00 40.0 92 60-120 <br /> 1,1,2,2-Tetrachloroethane 36.3 2.00 40.0 91 60-120 <br /> I,1,1,2-Tetrachloroethane 47.0 2.00 40.0 118 60-120 <br /> Tetrachloroethene 44.0 2.00 40.0 110 60-120 <br /> Toluene 44.0 2.00 „ 40.0110 60-120 <br /> 1,2,3-Trichlorobenzene 41.0 2.00 40.0 102 60-120 <br /> 1,2,4-Trichlorobenzene 46.9 2.00 40.0 117 60-120 <br /> I1,1,2-Trichloroethane 41.0 2.00 40.0 102 60-120 <br /> mg/L=milligrams per Liter=ppm DLR=Detection Limit for Airpose of Reporting. <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> ' result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> "43N. H"estlane. Sude B2 Stockton CA. 95210 vhone: (209) 47%-tY105 Ftzti: (309) 477-8148 <br />