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0 <br />QSequoia <br />Analytical <br />404 H Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-96W <br />FAX (925) 988-9673 <br />www sequolalabs corn <br />Gettier Ryan, Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron #9-5775 Reported <br />Dublm CA 94568 Project Manager Scott Polston 26 -.Ful -00 10 48 <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 />Analvte Result Limit Units Level Result %REC Linuts RPD Limit Notes <br />Batch OG19001 - EPA 5030B [PIT] <br />175 <br />050 ug/l <br />20 0 <br />Blank (OG19001-BLKI) <br />875 <br />70-130 <br />Prepared & Analyzed 19 -Jul -00 <br />Purgeable Hydrocarbons <br />ND <br />50 ug/1 <br />050 <br />Benzene <br />ND <br />050 " <br />70-130 <br />Toluene <br />ND <br />050 " <br />19 0 <br />Ethylbenzene <br />ND <br />050 " <br />950 <br />%ylenes (total) <br />ND <br />0 50 " <br />Xylenes (total) <br />Surrogate a a a-Trt luorotoluene <br />309 <br />" <br />300 103 70-130 <br />LCS (OG19001-BSI) <br />70-130 <br />Prepared & Analyzed 19 -Jul -00 <br />Benzene <br />170 <br />050 ug/1 <br />200 850 70-130 <br />Toluene <br />186 <br />050 <br />200 930 70-130 <br />Ethylbenzene <br />205 <br />050 <br />200 103 70-130 <br />-Xylenes (total) <br />613 <br />050 <br />600 102 70-130 <br />Surrogate a ao-Tnfluorotoluene <br />258 <br />ND <br />300 860 70-130 <br />Matrix Spike (OG19001-MSI) <br />528 <br />Source W007098-07 <br />Prepared & Analyzed 19 -Jul -00 <br />Benzene <br />175 <br />050 ug/l <br />20 0 <br />ND <br />875 <br />70-130 <br />Toluene <br />19 4 <br />050 <br />200 <br />ND <br />970 <br />70-130 <br />Ethylbenzene <br />19 0 <br />050 <br />200 <br />ND <br />950 <br />70-130 <br />Xylenes (total) <br />649 <br />050 <br />600 <br />ND <br />108 <br />70-130 <br />Surrogate a a a-Trifluorotoluene <br />254 <br />300 <br />84 7 <br />70-130 <br />Matnx Spike Dup (OG19001-MSDI) <br />Source W007098-07 <br />Prepared & Analyzed 19 -Jul -00 <br />Benzene <br />166 <br />050 ug/1 <br />200 <br />ND <br />830 <br />70-130 <br />528 <br />20 <br />Toluene <br />185 <br />050 <br />200 <br />ND <br />925 <br />70-130 <br />475 <br />20 <br />Ethylbenzene <br />197 <br />050 <br />200 <br />ND <br />985 <br />70-130 <br />3 62 <br />20 <br />Xylenes (total) <br />589 <br />0 50 <br />600 <br />ND <br />982 <br />70-130 <br />969 <br />20 <br />Surrogate a,aa-Tnfluorotoluene <br />0equoia Analytical - Walnut Creek <br />261 <br />11 300 870 70-130 <br />The results rn this report apply to the samples analyzed in accordance with the chain of <br />custody document This analytical report must be reproduced in its entirety <br />Page 7 of 11 <br />