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cF 9 a <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(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)92I-9600 FAX(916)921-0100 <br /> 11cp Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project 10 KOK Realty 62581 0001 <br /> 1260 Graphics Drive Matrix Solid <br /> Modesto, CA 95351-1502 <br /> :Attention Jeanne Hornsey Work Order# 9809733 -05, 07 Reported Sep 30, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> 71-C <br /> Analyte Beryllium Cadmium Chromium Nickel Mercury <br /> QC Batch# ME09159a6010MDC ME09159a6010MDC ME0915986010MDC ME091598601OMDC ME0916987471M4 <br /> Analy Method. EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 7471 <br /> Prey. Method EPA 3050 EPA 3050 EPA 3050 EPA 3050 EPA 7471 <br /> Analyst: C Caoile C Cacile C Caode C Caoile B Entenmann <br /> MS/MSD# 980973305 980973305 980973305 980973305 980981801 <br /> Sample Cone.. N 0 ND 18 18 046 <br /> Prepared Date: 9/15/98 9/15/98 9/15/98 9/15/98 9/16/98 <br /> Analyzed Date 9/15/98 9/16/98 9/16/98 9/16/98 9/16/98 <br /> Instrument LD # MTJA5 MTJA5 MTJAS MTJA5 MPE4 <br /> Cone. Sp=ked 50 mg/Kg 50 mg/Kg 50 mg/Kq 50 mg/Kg 2 0 mg/Kg <br /> Result 42 44 61 60 17 <br /> �MS %Recovery 84 88 Be 84 85 <br /> Dup Result: 41 43 61 60 17 <br /> MSD % Recov 82 86 86 84 85 <br /> RPD' 24 2.3 00 00 00 <br /> RPD Limit' 0-20 0-20 0-20 0-20 0-20 <br /> LCS# LCS091598 LCS091598 LCS091598 LCS091598 LCS091698 <br /> Prepares! Date: 9/15/98 9/15/98 9/15/98 9/15/98 9/16/98 <br /> Analyzed Date' 9/16/98 9/16/98 9/16/98 9/16/98 9/16/98 <br /> Instrument I ❑ #' MTJAS MTJA5 MTJA5 MTJA5 MPE4 <br /> Cone. Spiked- 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg 2 0 mg/Kg <br /> LCS Result. 50 50 50 50 is <br /> LCS % Recov .. 100 100 100 100 90 <br /> 80-120 80-120 80-120 80-120 75-125 <br /> LCS 80-120 80-120 80-120 80-120 75.125 <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 /> ofEQUOIA 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 matnx spike does not fall within specified control limits due to matrix <br /> an K1m interference,the LCS recovery is to be used to validate the batch <br /> Project Manager *MS-Matrix Spike, MSD-MS Duplicate,RPO=Reiative% Difference 9809733 AAA 41> <br /> I <br />