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Irl (u(kIk <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)908-9673 <br /> a819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> IwAnalytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID Farmer Property, #62596 0001 <br /> 1260 Graphics Drive Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Drew Van Allen Work Order# 9806116-05, 11 Reported Jul 15, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Lead <br /> QC Batch# ME0701987000MDA <br /> Analy. Method EPA 239 2 <br /> Prep Method EPA 3020 <br /> Analyst J Jencks <br /> MS/MSD# 980615901 <br /> Sample Conc N D <br /> Prepared Date 7/1/98 <br /> Analyzed Date 7/6/98 <br /> Instrument I D # MTJA3 <br /> Conc. Spiked 0 050 mg/L <br /> Result 0 039 <br /> MS % Recovery 78 <br /> Dup Result 0037 <br /> MSD%Recov 74 <br /> RPD 53 <br /> RPD Limit 0-20 <br /> LCS# BLK070198 <br /> Prepared Date 7/1/98 <br /> Analyzed Date 7/6/98 <br /> Instrument I D # MTJA3 <br /> Conc Spiked 0 050 mg/L <br /> LCS Result 0056 <br /> LCS % Recov 112 <br /> 75-125 <br /> LCS 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 /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> t 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 contrai limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> an Ki <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9807057AAA <2> <br />