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a <br /> Sequoia 404 WLane <br /> t Walnut Creek CAA 94598 <br /> (925)988-9600 <br /> Analytical <br /> 1 FAX(925)alabs c 73 <br /> L [.i www secluoialabs coin <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 15-Jun-01 10 47 <br /> Conventional Chemistry Parameters by APHA/EPA Methods - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units bevel Result %REC Limits RPD Limit Notes <br /> Batch 1E31018-EPA 3510B SepFunnel <br /> Blank(1E31018-BLKI) Prepared&Analyzed 31-May-OI <br /> TRPH ND 50 mg/I <br /> I <br /> Blank(IE31018-BLK2) Prepared 31-May-01 Analyzed 01-Jun-01 <br /> TRPH ND 50 mg/I <br /> LCS(1E31018-BS1) w Prepared&Analyzed 31-May-01 <br /> TRP14 904 50 mg/1 100 904 70-130 <br /> LCS(1E31018-BS2) Prepared 31-May-01 Analyzed 01-Jun-01 <br /> TRPH 895 50 mgn 100 895 70-130 <br /> LCS Dup (1E3I018-BSDI) Prepared&Analyzed 31-May-01 <br /> TRPH 842 50 tng/I 100 842 70-130 710 30 <br /> • <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entered <br /> Page 23 of 24 <br />