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Sequoia <br />Analytical <br />Gettler Ryan, Inc -Dublin <br />6747 Sierra Court Suite J <br />Dublin CA 94568 <br />Project Chevron <br />Project Number Chevron # 9-5775 <br />Project Manager Scott Polston <br />Volatile Organic Compounds by EPA Method 8260A - Quality Control <br />Sequoia Analytical - Walnut Creek <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequolalabs com <br />Reported <br />18 -Apr -00 11 39 <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OD14016 - EPA 5030B [PIT] <br />Blank (OD14016-BLK1) <br />530 <br />Prepared & Analyzed 14 -Apr -00 <br />Hexachlorobutadiene <br />ND <br />0 50 mg/m' Air <br />Isopropylbenzene <br />ND <br />0 50 <br />p Isopropyltoluene <br />ND <br />0 50 <br />Methylene chlonde <br />ND <br />20 <br />Naphthalene <br />ND <br />10 " <br />n Fropylhenzene <br />ND <br />0 50 <br />Styrene <br />ND <br />050 <br />1 1,1,2 -Tetrachloroethane <br />ND <br />050 <br />1,12 2 Tetrachloroethane <br />ND <br />0 50 <br />Tetrachloroethene <br />ND <br />0 50 <br />Toluene <br />ND <br />0 50 <br />3-Tnchlorobenzene <br />ND <br />0 50 <br />4-Tnchlorobenzene <br />01,1-Trichloroethane <br />ND <br />0 50 <br />496 <br />ND <br />0 50 <br />11,11 2 -Trichloroethane <br />ND <br />050 <br />Trichloroethene <br />ND <br />050 " <br />Trichlorofluoromethane <br />ND <br />10 <br />1,2 3-Tnchloropropane <br />ND <br />0 50 " <br />1,2,4-Trunethylbenzene <br />ND <br />0 50 <br />1,3,5-Tntnethylbenzene <br />ND <br />0 50 <br />Vinyl cilonde <br />ND <br />050 „ <br />Total Xylenes <br />ND <br />050 " <br />Surrogate Dibrornofluoromethmie <br />530 <br />500 <br />106 <br />70-130 <br />Surrogate 11-Djchlormtharte-d4 <br />490 <br />Soo <br />980 <br />70.130 <br />Surrogate Toluene -d8 <br />Soo <br />Soo <br />100 <br />70-130 <br />Surrogate 4-Broroofluorob-cerw <br />460 <br />500 <br />920 <br />70-130 <br />LCS (OD14016-BSI) <br />Prepared & Analvzed 14 -Apr <br />-00 <br />Benzene <br />513 <br />0 50 <br />mg/m3 Air 50 0 <br />103 <br />60-140 <br />Chlorobenzene <br />489 <br />050 <br />Soo <br />978 <br />60-140 <br />1,1-Dichloroethene <br />496 <br />0 50 <br />500 <br />992 <br />60-140 <br />Toluene <br />454 <br />O 50 <br />500 <br />908 <br />60-140 <br />Trichloroethene <br />494 <br />050 <br />Soo <br />98 8 <br />60-140 <br />Surrogate Dibromofiuoramethane <br />53 0 <br />500 <br />106 <br />70-130 <br />Surrogate 1 1-DichloroeIhane-d4 <br />470 <br />500 <br />940 <br />70-130 <br />iuola Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br />eclcustody document This analytical report must be reproduced to its entirety <br />Page 20 of 22 <br />