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PRECISIGO 0 , <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANALM <br /> Tuesday,July 12, 200 <br /> Attention: Doug Heard <br /> Kleinfelder, Inc. Report Page 9 of <br /> 2825 Myrtle St. <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 /> Blank(AG50802-BLKI) Prepared&Analyzed:08-Jul-05 <br /> Acetone ND 100 ug/kg <br /> tert-Butyl Acohol(TBA) ND 50.0 " <br /> Methyl tert-butyl Ether(MtBE) ND 5.00 " <br /> Diisopropyl Ether(RIPE) ND 5.00 , <br /> Ethyl tert-Butyl Ether(ETBE) ND 5.00 " <br /> tert-Amyl Methyl Ether(TAME) ND 5.00 " <br /> Benzene ND 5.00 " <br /> Ethylbenzene ND 5.00 ' <br /> Toluene ND 5.00 " <br /> m,p-Xylene ND 5.00 " <br /> o-Xylene ND 5.00 ' <br /> LCS(AG50802-BSI) Prepared&Analyzed:08-Jul-05 <br /> tert-Butyl Acohol(TBA) 88.3 50.0 ug/kg 100 88 75-125 <br /> Methyl tert-butyl Ether(MtBE) 41.0 5.00 40.0 102 75-125 ' <br /> Diisopropyl Ether(RIPE) 15.5 5.00 20.0 78 75-125 <br /> Ethyl tert-Butyl Ether(ETBE) 15.9 5.00 20.0 80 75-125 <br /> tert-Amyl Methyl Ether(TAME) 15.5 5.00 20.0 78 75-125 <br /> Benzene 15.5 5.00 20.0 78 75-125 <br /> Ethylbenzene 15.5 5.00 20.0 78 75-125 <br /> Toluene 15.5 5.00 20.0 78 75-125 <br /> m,p-Xylene 31.7 5.00 40.0 79 75-125 ' <br /> o-Xylene 15.7 5.00 20.0 78 75-125 <br /> Matrix Spike(AG50802-MSI) Source:5070608-02 Prepared&Analyzed: 08-Jul-05 <br /> tert-Butyl Acohol(TBA) 88.0 50.0 ug/kg 100 0.00 88 75-125 , <br /> Methyl tert-butyl Ether(MtBE) 36.0 5.00 40.0 0.00 90 75-125 <br /> Diisopropyl Ether(DIPE) 17.8 5.00 20.0 0.00 89 75-125 <br /> Ethyl tert-Butyl Ether(ETBE) 15.6 5.00 20.0 0.00 78 75-125 <br /> tert-Amyl Methyl Ether(TAME) 16.0 5.00 20.0 0.00 80 75-125 , <br /> Benzene 16.2 5.00 20.0 0.00 81 75-125 <br /> Ethylbenzene 16.4 5.00 20.0 ND 82 75-125 <br /> Toluene 16.6 5.00 20.0 ND 83 75-125 <br /> m,p-Xylene 31.0 5.00 40.0 ND 78 75-125 <br /> mg1L=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 /> (�5 loxlre ._.�' ' <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 phone: (209) 477-8105 Fax: (209) 477-8148 <br />