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ii <br /> 40 qP PRECISIONr) <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Friday,April 4, 2008 <br /> Attention: Guy W,Roy <br /> R&L Diesel Report Page 39 of 41 <br /> PA.Box 2498 <br /> Danville, CA 94526 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Result „Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AC81102-Volatiles <br /> Reference(AC81102-SRMI) Prepared: 11-Mar-08 Analyzed: 12-Mar-08 <br /> --Benzene --- --15.4 -2-100 ug/kg - 2-b.0 - 77 75-120 <br /> Bromobenzene18.3 2.00 20.0 91 75-120 <br /> n-Butylbenzene 17.9 2.00 20.0 90 75-120 <br /> sec-Butylbenzene 15.4 2.00 20.0 77 75-120 <br /> tert-Butylbenzene 15.9 2.00 " 20.0 79 75-120 <br /> Chlorobenzene 19.5 2.00 1120.0 97 75-120 <br /> 2-Chlorotoluene 15.3 2.00 20.0 77 75-120 <br /> 1,2-13ibromoethane(EDB) 31.3 2.00 24.0 156 75-200 <br /> 1,2-Dichlorobenzene 18.0 2.00 26.0 90 75-200 <br /> 1,2-Dichloropropane 15.0 2.00 20.0 75 75-120 <br /> 1,3-Dichloropropane 22.2 2.00 20.0 111 75-120 <br /> cis-1,3-Dichloropropene t5.6 2,00 20.0 78 75-120 <br /> trans-1,3-Dichloropropene 21.7 2.00 20.0 109 75-120 <br /> Efliylbenzene 17.2 2.00 20.0 86 75-120 <br /> Hexachlorobutadiene 16.6 2.00 20.0 83 75-120 <br /> Isopropylbenzene 16.4 2.00 20.0 82 75-120 <br /> p-Isopropyltoluene 19.9 2.00 20.0 100 75-120 <br /> 1,1,1,2-Tetrachloroethane 28.3 2.00 20.0 142 75-200 <br /> Tetrachloroethane 23.2 2.00 2d.0 116 75-120 <br /> Toluene-- 23.5 2.00 20.0 118 75-120 <br /> 1,2,3-Trichlorobenzene 16.2 2.00 n 201'0 81 75-200 <br /> 1,2,4-Trichlorobenzene 15.8 2.00 20.0 79 75-200 <br /> 1,1,1-Trichloroethane 22.6 2.00 2010 113 75-200 <br /> TrichlorofluoromethaneL$.8 2.00 200 94 75-120 <br /> 1,2,3-Trichloropropane 22.4 ;2.00 200 112 75-200 <br /> 1,3,5-Trimethylbenzene 15.4 2.00 20 0 77 75-120 <br /> 1,2,4-Trimethylbenzene 15.0 2.00 20 0 75 75-200 <br /> m,p-Xylene 30.0 2.00 40 0 75 75-I20 <br /> o-Xylene 18.2 2.00 20j0 91 75-120 <br /> Surrogate:DibromoJluoromethane 44.0 50.0 88 86-118 <br /> Surrogate:Toluene-d8 54.0 50jo 108 88-110 <br /> Surrogate:4-BromoJluorobenzene 45.8 50.1 91 86-115 <br /> mg/L-milligrams per Liter=ppm DLR-Detection Limit forPurpose 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 /> J <br /> Jonathan Le,Laboratory Director <br /> 3935 N. Coronado Ave Stockton CA. 95204 phone: (209) 47 -8105 Fax: (209) 546-7497 <br />