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40 Sequoia <br />Analytical <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs com <br />Gettler Rvan Inc - Dublin Project Chevron <br />6747 Sierra Court Suite J Prole(,t Number Chevron 49-5775 Reported <br />Dublin CA 94568 ProJee.t Manager Scott Polston 15 -Aug -00 08 02 <br />Total Purgeable Hydrocarbons (CG-Clz) and BTEX 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 Limn Notes <br />Batch OH14002 - EPA 5030B [PIT] <br />Blank (OH141102-BLKI) Prepared & Analyzed 14 -Aug -00 <br />Purgeable Hydrocarbons <br />ND <br />50 <br />ug/1 <br />997 <br />70-130 <br />Benzene <br />ND <br />030 <br />Source W008305-02 <br />Prepared & Analyzed <br />Toluene <br />ND <br />0 50 <br />Benzene <br />185 <br />050 ug/l <br />Ethylbenzene <br />ND <br />050 <br />" <br />20 <br />Toluene <br />\ylencs (total) <br />ND <br />050 <br />960 <br />70-130 <br />206 <br />Surrogate a a a-Trrfluorotoluene <br />303 <br />198 <br />050 <br />300 <br />101 70-130 <br />LCS (OH14002-BSI) <br />200 <br />20 <br />Xylenes (total) <br />Prepared & Analvzed <br />14 -Aug -00 <br />Benzene <br />18 7 <br />050 <br />ugrl <br />200 <br />93 5 70-130 <br />oluene <br />193 <br />050 <br />200 <br />965 70-130 <br />ylhenzene <br />200 <br />0 50 <br />200 <br />100 70-130 <br />ylenes (total) <br />60 1 <br />0 50 <br />600 <br />100 70-130 <br />Surrogate a a a-Trr luorololueue <br />28 7 <br />300 <br />95 7 70-130 <br />Matrix Spike (OH14002-MSI) <br />Source W008305-02 <br />Prepared & Analyzed <br />14 -Aug -00 <br />Benzene <br />192 <br />050 <br />ug/l <br />200 ND <br />960 70-130 <br />Toluene <br />19 6 <br />050 <br />200 ND <br />980 70-130 <br />Ethylbenzene <br />202 <br />050 <br />200 ND <br />101 70-130 <br />\ylenes (total) <br />608 <br />030 <br />600 ND <br />101 70-130 <br />Surrogate a a a Tnfluorotoluene <br />299 <br />300 <br />997 <br />70-130 <br />Matrix Spike Dup (OH14002-MSD1) <br />Source W008305-02 <br />Prepared & Analyzed <br />14 -Aug -00 <br />Benzene <br />185 <br />050 ug/l <br />200 ND <br />925 <br />70-130 <br />371 <br />20 <br />Toluene <br />192 <br />050 <br />200 ND <br />960 <br />70-130 <br />206 <br />20 <br />Ethylbenzene <br />198 <br />050 <br />200 ND <br />990 <br />70-130 <br />200 <br />20 <br />Xylenes (total) <br />602 <br />050 <br />600 ND <br />100 <br />70-130 <br />0 992 <br />20 <br />Surrogate a a a 7'nfluororoluene <br />285 <br />300 950 70-130 <br />equola Analytical - Walnut Creek The results Of this report apply to the 3atnples analvzed in accordance with the chain of <br />custody document This analytical report rnuv be reproduced in its entirety <br />Page 5 of 7 <br />