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404 N Wiget Lane <br /> Walnut Creek.CA 94596 <br /> Sequoia (925)988-9600 <br /> 41)U F"(925)986-%73 <br /> Analytical www s' <br /> Mr <br /> Gettler Ryan,lnc -Dubhn Project Chevron <br /> 6747 Sierra Court Suite 7 Project Number Chevron#9-1848 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 16-Aug-0019 08 <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 Lunt Umts Level Result %REC Limits RPD Lnmrt Notes <br /> Batch OH09003-EPA 5030B[PM <br /> Blank(OH09003-BLKl) Prepared&Analyzed 09-Aug-00 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tart-butyl ether ND 25 " <br /> Surrogate qaa-TrYfluorotoluene 303 300 101 70-130 <br /> LCS(OH09003-BSI) Prepared&Analyzed 09-Aug-00 <br /> Benzene 184 0 50 ug4 200 920 70-130 <br /> Toluene 187 0 50 200 935 70-130 <br /> 189 0 50 200 945 70-130 <br /> x i (fatal) 547 0 50 600 912 70-130 <br /> Surrogate 4aa-Y},j ororoluene 275 300 917 70.130 <br /> Matnz Spike(OH09003-MS1) Source W008104-20 Prepared&Analyzed 09-Aug-00 <br /> Benzene 220 050 ug/1 200 ND 110 70-130 <br /> Toluene 220 0 50 200 ND 110 70-130 <br /> Ethylbenzene 220 0 50 200 ND 110 70-130 <br /> Xyienea(total) 638 0 50 600 ND 106 70.130 <br /> Srtrrogate rgaarThfluorotoluene 2116 " 300 953 70.130 <br /> Matrix Spike Dup(OH09003-MSDI) Source W008104-20 Prepared&Analyzed 09-Aug-00 <br /> 13enzetne 214 050 ugll 200 ND 107 70-130 276 20 <br /> Toluene 219 050 200 ND 109 70-130 0 456 20 <br /> Ethylbenzene 219 0 50 200 ND 109 70-130 0 456 20 <br /> Xylenes(total) 635 0 50 600 ND 106 70-130 0 471 20 <br /> Surrogate aa a-7)1J orotoluene Z8 I 300 93 7 70.130 <br /> ` ia Analytical-WalnutThCre& e results in this report apply to the scmipks anabaed in accordm w with rhe chain of <br /> custody document.This analytical report must be reproduced in its ennroy <br /> Page 4 of 5 <br />