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Sequoia 680 Chesapeake Drive Redwood City 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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)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 /> . 1551 Industrial Road San Carlos CA 94070 41 1 1 (650)232 9600 FAX(650) 232 9612 <br /> ATC Associates, Inc Client Project ID Continental Grain 62500 0001 <br /> 1117 Lone Palm Avenue Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Drew Van Allen Work Order# 9902A52-02, 03 Reported Mar 3, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPN <br /> Benzene <br /> QC Batch# GCO22499802002A GCO22499802002A GCO22499802002A GCO22499802002A GCO22499802002A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst C Westwater C W"twater C Westwater C Westwater C Westwater <br /> MS/MSD# 9021549 9021549 9021549 9021549 9021549 <br /> Sample Cone N D N D N D N D N D <br /> Prepared Date 2/24/99 2/24/99 2/24/99 2/24/99 2/24/99 <br /> Analyzed Date 2/24/99 2/24/99 2/24/99 2/24/99 2/24/99 <br /> Instrument I D# HP2 HP2 HP2 HP2 HP2 <br /> Conic Spiked 20pg/L 20 pg/l. 20Mg/L 60Ng/L 290ug/L <br /> i <br /> Result 19 19 20 63 310 <br /> �MS % Recovery 95 95 100 105 107 <br /> Dup Result 18 18 19 61 300 <br /> MSD % Recov 90 90 95 102 103 <br /> RPD 54 54 51 32 33 <br /> RPD Limit 0-20 020 0-20 0-20 050 <br /> LCS# LCS022499 LCS022499 LCS022499 LCS022499 LCS022499 <br /> Prepared Date 2/24/99 2/24/99 2/24/99 2/24/99 2/24/99 <br /> Analyzed Date 2/24/99 2/24/99 2/24/99 2/24/99 2/24/99 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conic Spiked 20)_tg/L 20 erg/L 20 pg/L 60 pg/L 290 ug/L <br /> LCS Result 19 18 19 62 310 <br /> LCS % Recov 95 90 95 103 107 <br /> LCS 70130 70-130 70130 70-130 50150 <br /> Control Limits <br /> Please Note <br /> SEQUOIA ANALYTICAL The LCS Is a control sample of known Interferent-free matrix that Is analyzed using the same reagents, <br /> &lap#1271 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 /> Interference,the LCS recovery Is to be used to validate the batch <br /> Ka im <br /> Project Manager ** — = tate RPD=Relative%Difference <br /> MS—Matrix Spike MSD MS Dupli 9902A52 AAA c2> <br />