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404 N Wiget Lane <br /> Walnut Creek,CA 94598 <br /> Sequoia (925)988-96W <br /> 4 FAX(925)988-9673 <br /> Analytical www sequolakd*mm <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron 49-8632 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 13-Ju1-0010 13 <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 /> Analyte Result Lunit Units Level Result %REC Limas RPD Lunt Notes <br /> Batch 0006004-EPA 5030B[PITT <br /> Blank(OG06004-BLKI) Prepared&Analyzed 06-Jul-00 <br /> Purgeablc Hydrocarbons ND 50 ug(l <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> Methyl tat-butyl ether ND 25 " <br /> Surrogate '44a-Thiluororoluene 289 300 963 70-130 <br /> LCs(OG06004-Bs1) Prepared&Analyzed 06-Jul-00 <br /> Benzene 183 050 ugll 200 915 70430 _ <br /> Toluene 198 050 200 940 70-130 <br /> Eth Krzezin <br /> 194 050 200 970 70-130 <br /> g O 591 050 " 600 968 70-130 <br /> Siasngare.gaa-Thfikorotoluene 289 300 963 90-130 <br /> Matrix Sp&e(0006004-MS1) Source.W006644-02 Prepared&Analyzed.06-Jul-00 <br /> Benzene 151 050 ug/I 200 ND 755 70-130 <br /> Toluene 159 050 200 ND 795 70-130 <br /> Bthylban— 174 050 200 ND 870 70-130 <br /> Xylenes Octal) 527 050 " 600 ND 878 70-130 <br /> Surrogate as a-Trr ororohwne 2&6 300 953 70-130 <br /> Matrix Spike Dup(OG06004-MSD1) Source.W006644-02 Prepared&Analyzed 06-Jul-00 <br /> Berme 176 050 ugll 200 ND 8&0 70-130 153 20 <br /> Toluene 186 050 200 ND 930 70-130 157 20 <br /> Ethythenzew 201 050 200 ND 101 70-130 144 20 <br /> Xylmea(total) 607 050 600 ND 101 70-130 141 20 <br /> S—gate 44-Trijk-rolohuene 296 " 300 9&7 70-130 <br /> S la AnalyaCal-Walnut Crede The results rn thio report apply to dw xw pks analysed rn awordanse with the c"n of <br /> custody docrarrent Tins meu�lyheal report must be tsps ndicead in ria emrrety <br /> Page 6 of 9 <br />