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Sequoia <br />Analytical <br />404 N Wlget Cane <br />Walnut Creels, CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />Gettler Ryan, Inc - Dublin Project Chevron <br />6747 Sierra Court Suite J ProlectNumber Chevron # 9-5775 Reported <br />Dublin CA, 94568 Project Manager Deanna L Harding 17 -Jan -00 09 18 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OA05002 Prepared 05 -Jan -00 Using EPA 5030B [PIT] <br />Blank (OA05002-BLKI) <br />Purgeable Hydrocarbons <br />ND <br />50 <br />ug/I <br />Benzene <br />ND <br />050 <br />" <br />Toluene <br />ND <br />050 <br />" <br />Ethylbenzene <br />ND <br />050 <br />" <br />Xylenes (total) <br />ND <br />0 50 <br />" <br />Methyl Cert -butyl ether <br />ND <br />2 5 <br />" <br />Surrogate as a-Trnfluorotoluene <br />347 <br />300 <br />176 <br />70-130 <br />LCS (OA05002-BSI) <br />Benzene <br />209 <br />0 50 <br />ugll <br />200 <br />104 <br />70-130 <br />Toluene <br />210 <br />050 <br />200 <br />105 <br />70-130 <br />216 <br />050 <br />'1 <br />200 <br />108 <br />70-130 <br />Sylbenzene <br />lens (total) <br />65 2 <br />050 <br />600 <br />109 <br />70-130 <br />Surrogate a,a,a-Trrfluorotoluene <br />306 <br />300 <br />102 <br />70-130 <br />Matrix Spike (OA05002-MSI) <br />Source W912605-01 <br />Benzene <br />218 <br />050 <br />ugA <br />200 <br />ND <br />109 <br />70-130 <br />Toluene <br />217 <br />050 <br />200 <br />ND <br />109 <br />70-130 <br />Ethylbenzene <br />212 <br />050 <br />200 <br />ND <br />106 <br />70-130 <br />Xylenes (total) <br />625 <br />050 <br />600 <br />ND <br />104 <br />70-130 <br />Surrogate Acta-Tnfluorotoluene <br />329 <br />300 <br />110 <br />70.130 <br />Matrix Spike Dup (OA05002-MSDI) <br />Source W912605-01 <br />Benzene <br />212 <br />050 <br />ugll <br />200 <br />ND <br />106 <br />70-130 <br />2 79 <br />20 <br />Toluene <br />215 <br />050 <br />200 <br />ND <br />108 <br />70-130 <br />0 926 <br />20 <br />Mylbenzene <br />224 <br />050 <br />" <br />200 <br />ND <br />112 <br />70-130 <br />5 50 <br />20 <br />Xylenes (total) <br />654 <br />050 <br />600 <br />ND <br />109 <br />70-130 <br />4 53 <br />20 <br />Surrogate 94a-Trifluorotoluene <br />316 <br />300 <br />105 <br />70.130 <br />equoia Analytical - Walnut Creek <br />The results in tins report apply to the samples analyzed in accordance with the chain of <br />custody document Tins analyhcal report must be reproduced in r [s ergrrely <br />a1 exp, a rat �imcto�rPage 4 of 6 <br />