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ti,./ 819 Striker Avenue, Suite 8 <br />Sequoia Sacramento, CA 95834 <br />15)(916) 921-9600 <br />FAX (916) 921-0100 <br />m%ff Analytical vwww.sequoialabs.com <br />Kleinfelder - Stockton <br />Project: <br />1444 Mariposa <br />S309079- <br />2825 East Myrtle Street <br />Project Number: <br />34202 <br />'Reported: <br />Stockton CA, 95205 <br />Project Manager: <br />Francis Bean <br />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 />,nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 3080408 - EPA 5030B [P/TJ <br />0.0448 <br />0.0500 <br />Blank (3080408-BLK1) <br />60-140 <br />Prepared & Analyzed: 08/29/03 <br />p-Isopropyltoluene <br />ND <br />0.0050 mg/kg <br />Methylene chloride <br />ND <br />0.025 " <br />Methyl 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 />1,1,1,2 -Tetrachloroethane <br />ND <br />0.0050 " <br />1,1,2,2 -Tetrachloroethane <br />ND <br />0.0050 " <br />Tetrachloroethene <br />ND <br />0.0050 " <br />Toluene <br />ND <br />0.0050 " <br />1,2,3-Trichlorobenzene. <br />ND <br />0.0050 " <br />1,2,4-Trichlorobenzene <br />ND <br />0.0050 " <br />1,1,1 -Trichloroethane <br />ND <br />0.0050 " <br />1,1,2 -Trichloroethane <br />ND <br />0.0050 " <br />Trichloroethene <br />ND <br />0.0050 " <br />Trichlorofluoromethane <br />ND <br />0.025 " <br />1,2,3-Trichloropropane <br />ND <br />0.0050 " <br />1,2,4-Trimethylbenzene . <br />ND <br />0.0050 " <br />1,3,5-Trimethylbenzene <br />ND <br />0.0050 " <br />Vinyl chloride <br />ND <br />0.025 " <br />m,p-Xylene <br />ND <br />0.0050 " <br />Ethanol <br />ND <br />0.20 " <br />Tert-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 />Tert-butyl alcohol <br />ND <br />0.050 " <br />Surrogate: Dibromofluoromethane <br />0.0448 <br />0.0500 <br />90 <br />60-140 <br />Surrogate: 1,2 -DCA -d4 <br />0.0450 <br />0.0500 <br />90 <br />60-140 <br />Surrogate: Toluene -d8 <br />0.0464 <br />0.0500 <br />93 <br />60-140 <br />Surrogate: 4 -BFB <br />0.0464 <br />0.0500 <br />93 <br />60-140 <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. <br />Page 13 of 17 <br />