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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (9Z5)988 9600 FAX(925)988-9673 <br /> • Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9Z1 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 792 0342 <br /> Blaine Tech Services Client Protect ID Chevron 9-86321980810-T2 <br /> 1680 Rogers Avenue <br /> San Jose, CA 95112 <br /> Attention Fran Thie QC Sample Group 9808853-05 Reported Aug 31 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 413 2 <br /> Analyst B Anderson <br /> ANALYTE Total 011 and Grease <br /> QC Batch # IN081898413200A <br /> i <br /> Sample No LCS081798 <br /> Date Prepared 8117198 <br /> Date Analyzed 8117/98 <br /> Sample Cone mg/L N D <br /> Conc Spiked, mg1L 3 9 <br /> Matrix Spike mglL 5 2 <br /> % Recovery 133 <br /> Matrix <br /> Spike Duplicate mg1L 5 0 <br /> % Recovery 128 <br /> Relative % Difference 3 8 <br /> RPD Control Limits 0-20 <br /> LCS Batch# LCS081398 <br /> Date Prepared 8/18/98 <br /> Date Analyzed 8/18198 <br /> Cane Spiked mg/L 39 <br /> LCS Recovery, mg1L 3 4 <br /> LCS % Recovery 87 <br /> Percent Recovery Control Limits <br /> F—LCS/11-CS13 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 interferent free matrix that is analyzed using the same reagents <br /> EQUOIA 4YTICAL 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 limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> Ory <br /> c anager <br /> "J <br />