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Sequoia 680 Chesapeake Drive Redwood CAry CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> 404 N Wlget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)911-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792-1865 FAX(707)79Z-034Z <br /> ATC Associates, Inc Client Project ID Westrec Proper/KlR 62514 0001 <br /> 1117 Lone Palm Avenue <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey QC Sample Group 9903268-01-07 Reported Mar 24, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015A <br /> Analyst J BONNVILLE <br /> ANALYTE Diesel <br /> QC Batch # GC0310990HBPEXA <br /> Sample No 9903120-1 <br /> Date Prepared 3110199 <br /> Date Analyzed 3110199 <br /> Instrument I D # GCHP56 <br /> Sample Cone , ug/L N D <br /> Cone Spiked, ug/L 1000 <br /> Matrix Spike, uglL 590 <br /> % Recovery 59 <br /> 1� Matrix <br /> Spike Duplicate ug/L 720 <br /> % Recovery 72 <br /> Relative % Difference 20 <br /> RPD Control Limits 0-50 <br /> LCS Batch# BLK031099AS <br /> Date Prepared 3110199 <br /> Date Analyzed 3110199 <br /> Instrument I D # GCHPSB <br /> Cane Spiked ug/L 1000 <br /> Recovery, ug/L 780 <br /> LCS % Recovery 78 <br /> Percent Recovery Control Limits <br /> MS/MSD 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 ANALYTICAL 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 /> Ka�K,, <br /> Kay <br /> the LCS recovery is to be used to validate the batch <br /> Ka <br /> Project Manager <br />