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y <br />L819 Se n®la Striker Avenue, Suite 8 <br />® Sacramento, CA 95834 <br />1 (916)921-9600 <br />FAX (916) 921-0100 <br />Analytical www.sequoialabs.com <br />Kleinfelder - Stockton Project: 1444 Mariposa 5309079 <br />2825 East Myrtle Street Project Number: 34202 Reported: <br />Stockton CA, 95205 Project Manager: Francis Bean 09/09/03 16:14 <br />LVolatile 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 <br />Batch 3080408 - EPA 5030B (P/T] <br />(3080408-BLK2) <br />Prepared & Analyzed: 09/04/03 1. <br />p4sopropyltoluene <br />ND <br />0.0050 mg/kg <br />chloride <br />ND <br />0.025 <br />COethylene <br />vlethyl tert-butyl ether <br />ND <br />0.0050 " <br />Naphthalene <br />ND <br />0.0050. " <br />n-Propylbenzene <br />ND <br />0.0050 " <br />styrene <br />ND <br />0.0050 " <br />1,1,2 -Tetrachloroethane <br />ND <br />0.0050 " <br />1,1,2,2 -Tetrachloroethane <br />ND <br />0.0050 " <br />Letrachloroethene <br />ND <br />0.0050 <br />oluene <br />ND <br />0.0050 <br />1,2,3-Trichlorobenzene <br />ND <br />0.0050 <br />2,4-Trichlorobenzene <br />ND <br />0.0050 <br />,1,1 -Trichloroethane <br />ND <br />0.0050 <br />1,1',2 -Trichloroethane <br />ND <br />0.0050 " <br />Trichloroethene <br />ND <br />0.0050 " <br />nchlorofluoromethane <br />ND <br />0.025 <br />2,3-Trichloropropane <br />ND <br />0.0050 <br />1,2,4-Trimethylbenzene <br />ND <br />0.0050 <br />L3 5-Trimethylbenzene <br />ND <br />0.0050 <br />inyl chloride <br />ND <br />0.025 " <br />m,p-Xylene <br />ND <br />0.0050 " <br />ND <br />0.20 " <br />Vthanol <br />ert -amyl methyl ether <br />ND <br />0.0050 " <br />Ethyl tert-butyl ether <br />ND <br />0.0050 " <br />Di -isopropyl ether <br />ND <br />0.0050 " <br />-'ert-butyl alcohol <br />ND <br />0.050 <br />urrogate: DibromoJluoromethane <br />0.0353 <br />0.0500 <br />71 60-140 <br />Surrogate: 1,2 -DCA -d4 <br />0.0402 <br />0.0500 <br />80 60-140 <br />Lurrogate: Toluene -d8 <br />0.0488 <br />0.0500 <br />98 60-140 <br />urrogate: 4 -BFB <br />0.0485 <br />0.0500 <br />97 60-140 <br />Sequoia Analytical - Sacramento <br />L <br />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. <br />Page 15 of 17 <br />