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Sequoia <br />Analytical <br />Gettler Ryan. Inc - Dublin <br />6747 Sierra Court Suite J <br />Dublin CA 94568 <br />Project Chevron <br />Pro}ectNumber Chevron #9-5775 <br />Project Manager Scott Polston <br />404 N Wlget Lane <br />Walnut Geek, CA 94598 <br />(925) 988-9600 <br />FAX {925) 988-9673 <br />www sequolaWm mm <br />Reported <br />26 -Jul -00 10 48 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Splice Source %REC RPD <br />Result Lmut Umts Level Result %REC Ltmlts RPD Lumt Notes <br />Batch OG19001 - EPA 5030B [PIT] <br />Blank (OG19001-BLKI) Prepared & Analyzed 19 -Jul -00 <br />Purgeable Hydrocarbons ND 50 11g/1 <br />Benzene ND 050 <br />Toluene ND 050 " <br />Ethylbemne ND 050 " <br />kvlenes (total) <br />ND <br />050 " <br />Surrogate aaa-Trtfluorotoluene <br />309 <br />300 103 70.130 <br />Prepared & Analyzed 19 -Jul -00 <br />LCS (OG19001-BS1) <br />Benzene <br />170 <br />050 ugJl <br />200 950 70-130 <br />Toluene <br />186 <br />050 <br />200 930 70-130 <br />Ethylbenune <br />205 <br />050 <br />200 103 70-130 <br />Xylenes (total) <br />613 <br />050 <br />600 102 70.130 <br />158 <br />300 86.0 70.130 <br />Surrogate aaa.Trtfluorotohiene <br />Matra Spice (OG19001-MSI) <br />Source W00709847 <br />Prepared & Analyzed 19 -Jul -00 <br />17 5 <br />050 119/1 <br />200 ND 975 70-130 <br />Benzene <br />194 <br />050 " <br />200 ND 970 70-130 <br />Tokme <br />Elhylbe =m <br />190 <br />050 <br />200 ND 950 70-130 <br />xylenes (total) <br />649 <br />050 " <br />600 ND 108 70.130 <br />Surrogate aaa-Trrfluor+atoluene <br />254 <br />300 847 70.130 <br />Matra Spike Dup (OG19001-MSDI) <br />Source W007098-07 <br />Prepared & Analyzed. I"ul-00 <br />Betanin <br />166 <br />050 ugA <br />200 ND 830 70.130 <br />528 20 <br />185 <br />050 <br />200 ND 925 70-130 <br />475 20 <br />Toluene <br />197 <br />050 <br />200 ND 9&5 70430 <br />362 20 <br />Ell ylbmzm <br />5&9 <br />050 <br />600 ND 9&2 70-130 <br />969 20 <br />Xylenes (total) <br />S1tR@ga aixa-Tnfluamohmm <br />26.1 <br />" <br />300 870 70.130 <br />Sequoia Analwltal - Walnut Creek The results rn this report apply 10 the sainples analysed in accordance with the chain of <br />custody document This analytical report mast be reproduced in its ena* <br />Page 7 of 11 <br />