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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 />www sequolalabs corn <br />Gettler Rvan lnc - Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron d 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 01 -Jun -00 11 05 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />tnalvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OE31001 - EPA 5030B [PIT] <br />Blank (OE31001-BLKI) <br />303 <br />Prepared & Analyzed 31 -May -00 <br />Purgeable Hydrocarbons <br />ND <br />50 ugll <br />Benzene <br />ND <br />0 50 <br />Toluene <br />ND <br />0 50 <br />Ethvlbenzene <br />ND <br />0 50 <br />iVlenes (total) <br />ND <br />0 50 <br />Surrogate a a a-TriJluorololueue <br />303 <br />300 101 -0130 <br />LCS (OE31001-BSI) <br />Prepared & Analyzed 31 -May -00 <br />Benzene <br />180 <br />050 <br />uwI 20 0 900 70 130 <br />Toluene <br />195 <br />0 50 <br />200 975 70-130 <br />Ethylbenzene <br />218 <br />0 50 <br />200 109 70-130 <br />Xylenes (total) <br />Adhkh <br />645 <br />0 50 <br />600 108 70-130 <br />-gate a aa-Trifluorololuene <br />263 <br />300 877 70-130 <br />LCS Dup (OE31001-BSD1) <br />Prepared & Analyzed 31 -May -00 <br />Benzene <br />17 2 <br />0 50 <br />ug/l 200 860 70.130 <br />4 55 <br />20 <br />Toluene <br />199 <br />0 50 <br />200 945 70 130 <br />3 13 <br />20 <br />Ethylbenzene <br />19 9 <br />0 50 <br />200 995 70-130 <br />9 11 <br />20 <br />Xylenes (total) <br />613 <br />0 50 <br />600 102 70-130 <br />509 <br />20 <br />Surrogate a as-Trri luororoluene <br />265 <br />300 883 70-130 <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the churn of <br />custody document This analytical report must be reproduced in its entirety <br />Page 4 of 7 <br />