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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequoialabscom <br /> Mettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sterna Court Suite J Project Number Tosco# 11193 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 30-Jun-00 )3 59 <br /> Physical Parameters by APHA/ASTM/EPA Methods - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch OF20006- General Preparation <br /> Duplicate(OF20006-DUP1) Source W006429-01 Prepared&Analyzed 16-Jun-00 <br /> Corrosivity 689 pH units 684 0 728 30 <br /> Batch OF22010- General Preparation <br /> Duplicate(OF22010-DUP1) Source W006429-01 Prepared&Analyzed 22-Jun-00 <br /> Ignitability by Flashpoint ND 10 °C ND 30 F-01 <br /> 0 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> 0 custody document TMs analytical report must be reproduced in its entirety <br /> Page 6 of 8 <br />