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819 Striker Avenue,Suite 8 <br /> S <br /> V e qu o i a `Y Sacramento, CA 958341 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www.sequoialabs.com <br /> J <br /> Kleinfelder-Stocktor Project: 1444 Mariposa S309079 <br /> 2825 East Myrtle Street Project Number: 34202 Reported: <br /> Stockton CA,95205 Project Manager: Francis Bean 09/09/03 16:14 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3080408-EPA 5030B (P/T] <br /> Laboratory Control Sample(3080408-BSI) Prepared&Analyzed:08/29/03 <br /> Benzene 0.0566 0.0050 mg/kg 0.0500 113 70-130 <br /> Chlorobenzene 0.0583 0.0050 0.0500 117 70-130 <br /> 1,1-Dichloroethene 0.0536 0.0050 0.0500 107 70-130 <br /> Toluene 0.0597 0.0050 0.0500 119 70-130 <br /> Trichloroethene 0.0537 0.0050 0.0500 107 70-130 <br /> Surrogate:DibromoJluoromethane 0.0504 0.0500 101 60-140 <br /> Surrogate:1,2-DCA-d4 0.0518 0.0500 104 60-140 <br /> Surrogate:Toluene-d8 0.0570 0.0500 114 60-140 <br /> Surrogate:4-BFB 0.0557 0.0500 I11 60-140 1 <br /> Laboratory Control Sample(3080408-BS2) Prepared&Analyzed:09/04/03 J <br /> Benzene 0.0494 0.0050 mg/kg 0.0500 99 70-130 <br /> Chlorobenzene 0.0486 0.0050 0.0500 97 70-130 <br /> IJ-Dichloroethene 0.0484 0.0050 0.0500 97 70-130 <br /> Toluene 0.0487 0.0050 0.0500 97 70-130 <br /> Trichloroethene 0.0470 0.0050 0.0500 94 70-130 <br /> Surrogate:Dibromohuoromethane 0.0464 0.0500 93 60-140 <br /> Surrogate:1,2-DCA-d4 0.0482 0.0500 96 60-140 <br /> Surrogate:Toluene-d8 0.0455 0.0500 91 60-140 <br /> Surrogate:4-BFB 0.0482 0.0500 96 60-140 <br /> Laboratory Control`;ample Dup(3080408-BSD1) Prepared&Analyzed: 09/04/03 ��!! <br /> Benzene 0.0552 0.0050 mg/kg 0.0500 110 70-130 3 200 <br /> Chlorobenzene 0.0536 0.0050 0.0500 107 70-130 8 200 <br /> 1,1-Dichloroethene 0.0541 0.0050 0.0500 108 70-130 0.9 200 <br /> Toluene 0.0534 0.0050 0.0500 107 70-130 11 200 <br /> Trichloroethene 0.0502 0.0050 0.0500 100 70-130 7 200 <br /> Surrogate:Dib,o..o luoromethane 0.0519 0.0500 104 60-140 <br /> Surrogate:1,2-DCA-d4 0.0535 0.0500 107 60-140 1 <br /> Surrogate:Toluene-d8 0.0505 0.0500 101 60-140 J <br /> Surrogate:4-BFB 0.0549 0.0500 110 60-140 J <br /> l J <br /> J <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. l <br /> Page 16 of 17 <br /> �r9 <br />