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680 Chesapeake Drive Redwood Clty CA 94063 (650)364-9600 FAX(650)364-9233 <br /> �1/'_'►��/J\� Sequoia 484 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 /> fwa� Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Ask <br /> Blaine Tech Services Client Project ID Chevron 9-82641981124-J2 <br /> 1680 Rogers Avenue <br /> San Jose, CA 95112 <br /> Attention Christine Lillie QC Sample Group 9811 H 50-01-03 Reported Dec 1 1 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015A <br /> Analyst G WARDLE <br /> ANALYTE Diesel <br /> QC Batch # GC1207980HBPEXZ <br /> Sample No 981 1 H51-4 <br /> Date Prepared 1217198 <br /> Date Analyzed 1219198 <br /> Instrument 1 D # GCHP4A <br /> Sample Cone ug/L 280 <br /> Cone Spiked ug/L 1000 <br /> Matrix Spike uglL 990 <br /> % Recovery 71 <br /> Matnx <br /> Spike Duplicate, uglL 1000 <br /> % Recovery 72 <br /> Relative % Difference 1 4 <br /> RPD Control Limits 0-50 <br /> LCS Batch# BLK 120798ZS <br /> Date Prepared 1217198 <br /> Date Analyzed 1219198 <br /> Instrument I D # GCHP4A <br /> Cone Spiked, uglL 1000 <br /> I <br /> Recovery uglL 960 <br /> LCS % Recovery 96 <br /> Percent Recovery Control Limits <br /> MSIMSD 50150 <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 /> SEQUOIA A�YTICALpreparation and analytical methods empioyed 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 /> gory <br /> rofect Manager <br />