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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 15of21 <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 %PEC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AC50116-Volatiles <br /> ' LCS(AC50116-BSI) Prepared&Analyzed:01-Mar-05 <br /> o-Xylene 38.0 5.00 ug/kg 40.0 95 60-125 <br /> Chlorobenzene 39.0 2.00 40.0 98 60-117 <br /> 1,1-Dichloroethene 40.0 2.00 „ 40.0 100 60-133 <br /> Toluene 42.0 2.00 40.0 105 60-122 <br /> Trichloroethene 44.0 2.00 40.0 110 60-117 <br /> ' Surrogate:Dibromofluoromethane 43.4 II 50.0 87 60-118 <br /> Surrogate:Toluene-d8 50.0 50.0 100 60-110 <br /> Surrogate:4-Bromofluorobenzene 40.1 50.0 80 60-115 <br /> LCS Dup(AC50116-BSDI) Prepared&Analyzed:01-Mar-05 <br /> tert-Butyl Acohol(TBA) 210 50.0 ug/kg 200 105 60-125 0 20 <br /> Methyl tert-butyl Ether(MtBE) 44.0 5.00 40.0 110 60-125 7 20 <br /> Diisopropyl Ether(DIPE) 40.0 5.00 40.0 loo 60-125 5 20 <br /> Ethyl tert-Butyl Ether(ETBE) 42.0 5.00 " 40.0 105 60-125 5 20 <br /> tert-Amyl Methyl Ether(TAME) 44.0 5.00 40.0 110 60-125 17 20 <br /> Benzene 42.0 5.00 40.0 105 60-125 0 20 <br /> Benzene 42.0 2.00 40.0 105 60-124 0 15 <br /> Ethylbenzene 37.0 5.00 40.0 92 60-125 0 20 <br /> Toluene 45.0 5.00 40.0 112 60-125 0 20 <br /> m,p-Xylene 87.0 5.00 80.0 109 60-125 1 20 <br /> o-Xylene 38.0 5.00 40.0 95 60-125 0 20 <br /> ' Chlorobenzene 37.0 2.00 1j 40.0 92 60-117 5 15 <br /> LI-Dichloroethene 39.6 2.00 40.0 99 75-133 1 15 <br /> Toluene 44.0 2.00 40.0 Ito 75-120 5 15 <br /> Trichloroethene 44.0 2.00 40.0 110 75-120 0 15 <br /> Surrogate:Dibromofluoromethane 43.0 I' 50.0 86 75-120 <br /> Surrogate:Toluene-d8 49.8 50.0 100 75-120 <br /> Surrogate:4-Bromofluorobenzene 39.1 50.0 78 75-120 <br /> mg/L=milligrams•per Liler=pprn DLR=Detection Limit for Purpose of Reporting. <br /> ug/L=micrograms per Liter=ppb Exceptional sample nuances or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 7743 N. H est Lane. Shite 82 Stockton C.;1. 95210 vhone: (209) 47--8105 Fri: (209) 477-8148 <br />