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1l a lr YRI <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(9Z5)988 9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-[865 FAX(707)792-0342 <br /> • 1551 industrial Road San Carlos CA 94070 4111 (650) 232 9600 FAX(650)232 9612 <br /> ATC Associates, Inc Client Project ID Continental Grain 62500 0001 <br /> 1117 Lone Palm Avenue <br /> Modesto, CA 95351 1502 <br /> Attention Drew Van Allen QC Sample Group 9902A52-01-03 Reported Mar 24 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015A <br /> Analyst A PORTER <br /> ANALYTE Diesel <br /> QC Batch # GCO222990HBPEXD <br /> Sample No 9902812-01 <br /> Date Prepared 2/19/99 <br /> Date Analyzed 2/22/99 <br /> Instrument I D # GCHP4A <br /> Sample Conic ug/L. 1 600 MS/MSD ARE REFERED FROM <br /> Conc Spiked ug/L 1000 GCO219990HBPEXB <br /> Matrix Spike, ug/L 1 100 <br /> r� % Recovery -40 <br /> Matrix <br /> Spike Duplicate, ug/L 1200 <br /> % Recovery -30 <br /> Relative % Difference 29 <br /> RPD Control Limits 0-50 <br /> LCS Batch# BLK022299DS <br /> Date Prepared 2/22/99 <br /> Date Analyzed 2/23/99 <br /> Instrument I D # GCHP4B <br /> Conc Spiked ug/L 1000 <br /> Recovery ug/L 720 <br /> LCS % Recovery 72 <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 i <br /> Please Note <br /> The SCS is a contra!sample of known interferent free matrix that is analyzed using the same reagents <br /> ,JWEQUOIA ANALYTICAL preparation and analytical methods employed for the samples The matrix spike is an aliquot of sampVe <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 /> interferenceZthe LCS recovery is to be used to validate the batch <br /> Kayvan KI <br /> Protect Manager <br /> i <br />