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+1 r1 • + <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Project ID Chevron 9-86321981124-J1 <br /> 1680 Rogers Avenue <br /> San Jose, CA 95112 <br /> Attention Christine Lillie QC Sample Group 9811 H52-05 Reported Dec 9 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 418 1 <br /> Analyst B ANDERSON <br /> ANALYTE TRPH <br /> QC Batch # IN120398418100A <br /> Sample No LCS120398 <br /> Date Prepared 1213198 <br /> Date Analyzed 1213198 <br /> Sample Conc mg/L N D <br /> Conc Spiked mg/L 4 0 <br /> Matrix Spike mg/L 4 1 <br /> % Recovery 102 <br /> Matrix <br /> Spike Duplicate mg/L 4 1 <br /> % Recovery 102 <br /> Relative % Difference 00 <br /> RPD Control Limits 0-20 <br /> LCS Batch# LCS120398 <br /> Date Prepared 12/3/98 <br /> Date Analyzed 1213/98 <br /> Conc Spiked mg/L 4 0 <br /> LCS Recovery, mg/L 4 1 <br /> LCS % Recovery 102 <br /> Percent Recovery Control Limits <br /> LCS/LCSD 60140 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> Please Note <br /> The LCS is a control sample of known interfefent free matrix that is analyzed using the same reagents <br /> SEQUOIA TICAL preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limas due to matrix <br /> nterference the LCS recovery is to be used to validate the batch <br /> ry <br /> ro a anager <br />