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1 680 Chesapeake Drive Redwood City CA 94063 )364 9233 <br /> k (650} 364-9600 FAX(650 <br /> Sequoia 404 IV W1 get lane Walnut Creek CA 94598 (945)988-9600 FAX(925)988-9673 � <br /> 819 Stoker Avenue Suite 8 Sacramento CA 95834 (918)921-9600 FAX(916)921 0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792 0342 <br /> r <br /> ATC Associates, Inc Client Project ID Continental Grain 62500 0001 <br /> 1260 Graphics Drive <br /> Modesto, CA 95351-1502 <br /> Attention Drew Van Allen QC Sample Group 9808A13-01-03 Reported Sep 3, 1998 <br /> i <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015 <br /> Analyst DB <br /> ANALYTE Gasoline <br /> QC Batch # GC082598BTEX30A <br /> Sample No GW9808821-03 <br /> Hate Prepared 8125198 <br /> Date Analyzed 8125198 <br /> Instrument I D # GCHP30 <br /> Sample Cone , ug1L N D <br /> ' Cone Spiked uglL 250 <br /> Matrix Spike ug/L 200 <br /> % Recovery 80 <br /> Matrix <br /> Spike Duplicate uglL 240 <br /> % Recovery 96 <br /> Relative % Difference 18 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GWLCS082598A <br /> ' Date Prepared 8125198 <br /> Date Analyzed 8125198 <br /> Instrument I D # GCHP30 <br /> ' Cone Spiked, uglL 250 <br /> LCS Recovery, uglL 250 <br /> ' LCS % Recovery 100 <br /> Percent Recovery Control Limits <br /> MS/MSD 60140 <br /> LCS 70130 <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 specdiad control limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> Ka Ki <br /> Project Manager <br /> r <br />