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Sequoia <br />� Analytical <br />404 N Wiget Lane <br />Walnut Creek, CA 94598 <br />(925) 988.9600 <br />FAX (925) 988-9673 <br />Gettler Ryan, Inc - Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Former Chevron 4 9-5775 Reported <br />Dublin CA, 94568 Project Manager Steve Carter 03 -Mar -00 1140 <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 00O2003 Prepared 02 -Mar -00 <br />Using EPA 5030B [PIT] <br />Blank (00O2003-BLK1) <br />Purgeable Hydrocarbons <br />ND <br />50 <br />ug/l <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 />050 <br />Methyl tent -butyl ether <br />ND <br />25 <br />" <br />Surrogate q a a-Trty%orotoluene <br />301 <br />300 <br />100 <br />70-130 <br />LCS (00O2003 -BSI) <br />Benzene <br />206 <br />050 <br />ug/l <br />200 <br />103 <br />70-130 <br />Toluene <br />208 <br />050 <br />200 <br />104 <br />70 130 <br />Ethylbenzene <br />208 <br />050 <br />200 <br />104 <br />70-130 <br />Xylenes (total) <br />600 <br />0 50 <br />600 <br />100 <br />70-130 <br />Surrogate qaa-Triluorotoluene <br />288 <br />300 <br />960 <br />70-130 <br />Matrix Spike (00O2003 -MSI) <br />Source W003001-08RE1 <br />Benzene <br />20 1 <br />0 50 <br />ug/l <br />200 <br />ND <br />101 <br />70-130 <br />Toluene <br />204 <br />050 <br />200 <br />ND <br />102 <br />70-130 <br />Ethylbenzene <br />205 <br />0 50 <br />200 <br />ND <br />103 <br />70-130 <br />Xylenes (total) <br />591 <br />050 <br />600 <br />ND <br />985 <br />70-130 <br />Surrogate q ata-Tnfluorotoluene <br />283 <br />300 <br />943 <br />70-130 <br />Matrix Spike Dup (00O2003-MSDI) <br />Source W003001-08RE1 <br />Benzene <br />213 <br />050 <br />ug/l <br />200 <br />ND <br />106 <br />70-130 <br />5 80 <br />20 <br />Toluene <br />216 <br />050 <br />200 <br />ND <br />108 <br />70-130 <br />5 71 <br />20 <br />Ethylbenzene <br />213 <br />0 50 <br />200 <br />ND <br />106 <br />70-130 <br />3 83 <br />20 <br />Xylenes (total) <br />61 5 <br />0 50 <br />600 <br />ND <br />103 <br />70-130 <br />398 <br />20 <br />Surrogate a 4 a-Tnfiuorotoluene <br />288 <br />300 <br />960 <br />70-130 <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed e n accordance with the chain <br />custody document This analytical report must he reproduced in its eno <br />Alan B Kemp, Laboratory Dimctor Page 8 of 10 <br />