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:IN Sequoia <br />WOAnalytical <br />404 N W1get Lane <br />Walnut Creek CA 94598 <br />(925)988-9600 <br />FAX (925) 9$8-9673 <br />www sequoialabs com <br />ler Rvan Inc -Dublin <br />Project <br />Chevron <br />300 <br />747 Sierra Court Suite 1 <br />Project Number <br />Chevron # 9-5775 <br />Reported <br />Dublin CA 94568 <br />Project Manager <br />Scott Polston <br />16 -May -00 15 24 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reportmg Spike Source %REC RPD <br />Inalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OE15003 - EPA 5030B IP/T] <br />298 130 <br />0 <br />300 <br />99 3 <br />Blank (OE 15003-BLKI) <br />rSpike (OlE15003-MSI) <br />Source W005082-06 <br />Prepared & Analyzed 15 -May -00 <br />Purgeable Hydrocarbons <br />ND <br />50 <br />ug/l <br />101 <br />Benzene <br />ND <br />050 <br />200 <br />ND <br />Toluene <br />ND <br />0 50 <br />206 050 <br />200 <br />Ethylbenzene <br />ND <br />050 <br />Xylenes (total) <br />596 050 <br />xylenes (total) <br />ND <br />0 50 <br />70.130 <br />215 <br />Surrogate aaa-Tri luorotoluene <br />340 <br />ND <br />300 <br />113 70-130 <br />LCS (OE15003-BSI) <br />20 <br />Xylenes (total) <br />Prepared & Analyzed <br />15 -May -00 <br />Benzene <br />209 <br />050 <br />ugfl 200 <br />104 70-130 <br />Toluene <br />21 3 <br />050 <br />200 <br />106 70-130 <br />Ethylbenzene <br />217 <br />0 50 <br />200 <br />109 70-130 <br />Xylenes (total) <br />625 <br />0 50 <br />600 <br />104 70-130 <br />te aaa-TriJluorotoluene <br />298 130 <br />0 <br />300 <br />99 3 <br />70.130 <br />rSpike (OlE15003-MSI) <br />Source W005082-06 <br />Prepared & Analyzed 15 -May -00 <br />Benzene <br />201 050 ugll <br />200 <br />ND <br />101 <br />70-130 <br />Toluene <br />203 050 <br />200 <br />ND <br />101 <br />70-130 <br />Ethylbenzene <br />206 050 <br />200 <br />ND <br />103 <br />70-130 <br />Xylenes (total) <br />596 050 <br />600 <br />ND <br />993 <br />70.130 <br />Surrogate aaa-Triluomtoluene <br />286 <br />300 <br />9S3 <br />70-130 <br />Matrut Spike Dup (OE15003-MSD1) <br />Source W005082-06 <br />Prepared 1k Analyzed 15 -May -00 <br />Benzene <br />209 <br />050 ug/1 <br />200 <br />ND <br />104 <br />70.130 <br />390 <br />20 <br />Toluene <br />213 <br />050 <br />200 <br />ND <br />106 <br />70-130 <br />491 <br />20 <br />Ethylbenzene <br />215 <br />050 <br />200 <br />ND <br />108 <br />70-130 <br />428 <br />20 <br />Xylenes (total) <br />620 <br />050 <br />600 <br />ND <br />103 <br />70-130 <br />395 <br />20 <br />Surrogate aaa-Trrfluorotoluene <br />Sequoia Analvtical - Walnut Creek <br />is <br />289 <br />300 963 70-130 <br />The re sults to this report apply 10 the sarnple r analyzed in accordance with the chain of <br />custody document This analytical report must be reproduced in its entirety <br />ON <br />Page 4 of 6 <br />