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PRECISICe <br /> ENVIRO-TEC <br /> 40 H <br /> Analytical Laboratory CERTIFICATE OFANALYSIJ <br /> Tuesday,July 12, 2005 <br /> Attention: Doug Heard ' <br /> Kleinfelder, Inc. <br /> 2825 Myrtle St. Report Page 101 of 103 <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 AG50802-Volatiles <br /> Matrix Spike Dup(AG50802-MSD1) Source:5070608-02 Prepared&Analyzed:08-Jul-05 <br /> tert-Butyl Acohol(TBA) 87.0 50.0 ug/kg 100 87 75-125 1 20 <br /> Methyl tert-butyl Ether(MtBE) 36.0 5.00 40.0 90 75-125 0 20 <br /> Diisopropyl Ether(DIPS) 15.6 5.00 20.0 78 75-125 13 20 <br /> Ethyl tert-Butyl Ether(ETBE) 15.9 5.00 20.0 80 75-125 2 20 , <br /> tert-Amyl Methyl Ether(TAME) 15.6 5.00 20.0 78 75-125 35 20 <br /> Benzene 18.0 5.00 20.0 90 75-125 11 20 <br /> Benzene 15.6 2.00 20.0 ND 78 60-124 3 15 <br /> Ethylbenzene 15.6 5.00 20.0 78 75-125 5 20 <br /> Toluene 17.1 5.00 20.0 86 75-125 3 20 <br /> m,p-Xylene 32.0 5.00 40.0 80 75-125 3 20 <br /> o-Xylene 16.6 5.00 20.0 83 75-125 2 20 ' <br /> Chlorobenzene 16.6 2.00 20.0 ND 83 60-117 3 15 <br /> 1,1-Dichloroethene 17.0 2.00 20.0 ND 85 70-133 111 15 <br /> Toluene 15.6 2.00 20.0 ND 78 65-122 1 15 <br /> Trichloroethene 17.0 2.00 20.0 ND 85 65-117 6 15 ' <br /> Surrogate.Dibromo luoromethane 48.0 50.0 96 86-118 <br /> Surrogate. Toluene-d8 51.0 50.0 102 88-110 <br /> Surrogate:4-Bromo,Jluorobenzene 48.0 50.0 96 86-115 ' <br /> mg/L=milligrams per Liter=ppm DLR=Detection Limit for Purpose 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/Ot-z� <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 phone: (209) 477-8105 Fax: (209) 477-8148 <br />