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40 <br /> Sequoia 680 t- esapeake Drive Redwood City CA 9406 (650)364-9600 FAX(650) 364-9233 <br /> 404 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 /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID KOK Realty 62581 0001 <br /> 1260 Graphics Drive Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Tom Lutterman Work Order# 9808939 -01 Reported Sep 9, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch# ME081898601OMDA ME081898601OMDA ME0818986010MOA ME081898601OMDA <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep Method EPA 3010 EPA 3010 EPA 3010 EPA 3010 <br /> Analyst C Caorle C Caoile C Caoile C Caoile <br /> MS/MSD # 9808A1501 980BA1501 9808A1501 9808A1501 <br /> Sample Conc NO ND N D N D <br /> Prepared Date 8/18/98 8/18/98 8/18/98 8/18/98 <br /> Analyzed Date 8/18/98 8/18/98 8/18/98 8/18/98 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 1 0 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> Result 11 11 10 10 <br /> IOMS % Recovery 110 110 100 100 <br /> Dup Result 11 11 10 10 <br /> MSD % Recov 110 110 100 100 <br /> RPD 00 00 00 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS# LCS081898 LCS081898 LCS081898 LCS081898 <br /> Prepared Date 8/18/98 8/18/98 8/18/98 8/18/98 <br /> Analyzed Date 8/18/98 8/18/98 8/18/98 8/18/98 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 1 0 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> LCS Result 11 11 11 11 <br /> LCS % Recov 110 110 110 110 <br /> 80-120 80-120 80-120 80120 <br /> LCS 80-120 80-120 80-120 80-120 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known, interferent-free matrix that is analyzed using the same reagents, <br /> NoEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> w ` 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 /> `— <br /> Ka n Kim y Interference,the LCS recovery is to be used to validate the batch <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9808939 AAA <1> <br />