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KI � <br /> 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creels,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 /> qwr Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID Bozzano Property <br /> 1260 Graphics Drive Matrix Solid <br /> Modesto, CA 95351-1502 <br /> Attention Tom Lutterman Work Order# 9806E06 -02, 08 Reported Jul 7, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> OC Batch# ME062398601OMDE ME062398601OMDE ME062398601OMDE ME062398601OMDE <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep Method EPA 3050 EPA 3050 EPA 3050 EPA 3050 <br /> Analyst C Caoile C Caoile C Caoile C Caoile <br /> MS/MSD # 9806E4601 9806E4601 9806E4601 9806E4601 <br /> Sample Conc N D N D 61 40 <br /> Prepared Date 6/23/98 6/23/98 6/23/98 6/23/98 <br /> Analyzed Date 6/23/98 6/23/98 6/23/98 6/23/98 <br /> Instrument I.D.# MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> Result 42 43 93 78 <br /> �MS % Recovery 84 86 64 76 <br /> Dup Result 45 45 95 80 <br /> MSD % Recov 90 90 68 80 <br /> RPD 69 45 21 25 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS # BLK062398 BLK062398 BLK062398 BLK062398 <br /> Prepared Date 5/23/98 6/23/98 6/23/98 6/23/98 <br /> Analyzed Date 6/23/98 6/23/98 6/23/98 6/23/98 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc. Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> LCS Result 49 48 49 49 <br /> LCS % Recov 98 96 98 98 <br /> 80-120 60-120 80-120 80-120 <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 /> �EQUOIA 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 /> interference,the LCS recovery is to be used to validate the batch <br /> K Imyai <br /> 'Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9806E06 AAA <1> <br />