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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 (925)988 9600 FAX(925)988-9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-010 0 <br /> . 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Project ID Chevron 9-86321980810-T,3 <br /> 1680 Rogers Avenue <br /> San Jose, CA 95112 <br /> Attention Fran Thre QC Sample Group 9808853-02-04 Reported Aug 31 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid --- --- <br /> Method LPA 8015A <br /> Analyst A PORTER <br /> ANALYTE Diesel <br /> QC Batch #1 GC0821 980HBPEXA <br /> Sample No 9808853 1 <br /> Date Prepared 8120198 <br /> Date Analyzed 8122198 <br /> Instrument 1 D # GCHP5A <br /> Sample Conc ug/L 88 <br /> Conc Spiked ug/L 1000 <br /> Matrix Spike ug/L 960 <br /> • % Recovery 87 <br /> Matrix <br /> Spike Duplicate ug1L 1000 <br /> % Recovery 91 <br /> Relative % Difference 4 5 <br /> RPD Control Limits 0 50 <br /> LCS Batch# BLK082198AS <br /> Date Prepared 8121/98 <br /> Date Analyzed 8124/98 <br /> Instrument I D # GCHP4A <br /> Conc Spiked ug/L 1000 <br /> Recovery ug/L 880 <br /> LCS % Recovery 88 <br /> Percent Recovery Control Limits <br /> F- <br /> MS/MSD 50 150 <br /> LCS 60 140 <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 /> j�EQUOIA ANALYTICAL preparation and anaiytical methods employed for the sampies 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 /> 79'!"Y the recovery of analytes from the matrix spike does not fall within specified cnntr6 limits due to matrix <br /> interference the LCS recovery is to be used to validate the hatch <br /> ger <br />