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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 sequoEalabs com <br />Settler Ryan, Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron 49-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 14 -Jun -00 07 58 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />knalvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OF09001 - EPA 5030B [PIT] <br />Blank (OF09001-BLKI) <br />Prepared & Analyzed 09 -Jun -00 <br />Purgeable Hydrocarbons <br />ND <br />50 <br />ugll <br />Benzene <br />ND <br />050 <br />" <br />Toluene <br />ND <br />050 <br />Ethylbenzene <br />ND <br />050 <br />Xylenes (total) <br />ND <br />050 <br />Methyl tert-butyl ether <br />ND <br />25 <br />" <br />Surrogate aaa-TriJluorotoluenre <br />313 <br />300 104 10.130 <br />LCS (OF09001-BSI) <br />Prepared & Analyzed 09 -Jun -00 <br />Benzene <br />179 <br />050 <br />ug/I <br />200 895 70-130 <br />Toluene <br />196 <br />050 <br />200 980 70-130 <br />Ethylbenzene <br />226 <br />050 <br />200 113 70 130 <br />blenes (total) <br />647 <br />050 <br />600 108 70-130 <br />Surrogate qaa-TnJluorotoluem <br />168 <br />300 893 70-130 <br />Matrix Spike (OF09001-MSI) <br />Source W005776-02 <br />Prepared & Analyzed 09 -Jun -00 <br />Benzene <br />159 <br />0 50 <br />ug1l <br />200 ND 795 70-130 <br />Toluene <br />172 <br />0 50 <br />200 ND 860 70-130 <br />Ethylbenzene <br />192 <br />0 50 <br />200 ND 960 70-130 <br />Xvlencs (total) <br />5"7 4 <br />050 <br />600 ND 957 70-130 <br />Surrogate aao-Ttlluorotoluene <br />168 <br />300 893 70-130 <br />Matra Spike Dup (OF09001-MSD1) <br />Source W005776-02 <br />Prepared & Analyzed 09 -Jun -00 <br />Benzene <br />171 <br />0 50 <br />ugA <br />200 ND 955 70-130 <br />727 20 <br />Toluene <br />177 <br />0 50 <br />200 ND 885 70-130 <br />287 20 <br />Ethylbenzene <br />19 5 <br />0 50 <br />200 ND 975 70-130 <br />155 20 <br />Xylenes (total) <br />578 <br />050 <br />600 ND 963 70-130 <br />0 694 20 <br />Surrogate a a a-Tnfluorotoluene <br />255 <br />300 850 70-130 <br />Analytical - Walnut Creek <br />The results to 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 3 of 4 <br />