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Sequoia <br />%07 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 Ryan Inc -Dublin Pro)ect Chevron <br />6747 Sierra Court Suite J Project Number Chevron ## 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott POlston 18 -Apr -00 11 39 <br />Total Purgeable Hydrocarbons (C6-02) and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />knalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OD17003 - EPA 5030B [P/TJ <br />Blank (OD17003-BLKI) Prepared & Analyzed 17 -Apr -00 <br />Purgeable Hydrocarbons ND 50 ugll <br />Benzene <br />ND <br />050 <br />Toluene <br />ND <br />050 <br />Ethylbenzene <br />ND <br />050 <br />Xylenes (total) <br />ND <br />050 <br />Surrogate ago-Tnfluorotoluene <br />300 <br />300 <br />100 70-130 <br />LCS (OD17003-BSI) <br />Prepared & Analyzed <br />17 -Apr -00 <br />Benzene <br />207 <br />050 ugll <br />200 <br />104 70 130 <br />Toluene <br />210 <br />050 <br />200 <br />105 70-130 <br />Ethylbenzene <br />212 <br />0 50 <br />200 <br />106 70-130 <br />Xylenes (total) <br />62 1 <br />0 50 <br />600 <br />103 70-130 <br />IV—gate aaa-Triiluorotoluene <br />289 <br />300 <br />963 70-130 <br />Matrix Spike (OD17003-MSI) <br />Source W004143-09 <br />Prepared & Analyzed <br />17 -Apr -00 <br />Benzene <br />200 <br />050 ugll <br />200 ND <br />100 70-130 <br />Toluene <br />202 <br />050 <br />200 ND <br />101 70-130 <br />Ethylbenzene <br />203 <br />050 <br />20 0 ND <br />101 70-130 <br />Xylenes (total) <br />588 <br />050 <br />600 ND <br />98 0 70-130 <br />Surrogate aaa-Tnfluorotoluene <br />285 <br />300 <br />950 70-130 <br />Matrix Spike Dup (OD 17003 -MSD 1) <br />Source W004143-09 <br />Prepared & Analyzed <br />17 -Apr -00 <br />BenZp1E <br />222 <br />050 ug/1 <br />200 ND <br />111 70430 <br />104 20 <br />Toluene <br />223 <br />050 <br />200 ND <br />111 70-130 <br />998 20 <br />Ethylbenzene <br />226 <br />050 <br />200 ND <br />113 70-130 <br />107 20 <br />Xylenes (total) <br />63 8 <br />050 <br />600 ND <br />106 70-130 <br />816 20 <br />Surrogate aaa-Tnfluoro[oluene <br />300 <br />300 <br />100 '0-130 <br />uota Aitalytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with [he chain of <br />e <br />f <br />custody document This analytical report must be reproduced in its entirety <br />Page 14 of 22 <br />