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Sequoia <br />Walnut Geek CA 945% <br />4 <br />(925)988-9600 <br />Analytical <br />FAX (925) 988-9673 <br />www sequoialabsAlkh <br />LCS Dup (OG05016-BSDI) <br />Gettler Rvan, Inc - Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron 4 9-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 25 -Jul -00 10 44 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX In Air by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reportmg Spike Source %REC RPD <br />Analvte Result Limit Units Level Result %RFC Limits RPD Limit Notes <br />Batch 0GO5016 - EPA 5030B [PIT] <br />LCS Dup (OG05016-BSDI) <br />Prepared 03 -Jul -00 Analyzed 05 -Jul -00 <br />Benzene <br />137 <br />0 010 <br />mg1m3 Atr 200 685 65 120 <br />215 <br />25 <br />Toluene <br />145 <br />0 010 <br />200 725 65-120 <br />215 <br />25 <br />Ethylbenzene <br />167 <br />0 010 <br />200 835 65-120 <br />228 <br />25 <br />Xylenes (total) <br />4 70 <br />0 010 <br />600 783 65-120 <br />213 <br />25 <br />Surrogate a a a-Tn.Jluorotoluene <br />equoia Anaiyucm - <br />514 <br />" 600 857 70.130 <br />The results in dus report apply to the samples analyzed in accordance wrth the <br />custody document Tius analytical report must be reproduced rn its <br />Page 15 of 25 <br />