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68OQ.peake Drive Redwood City.CA 940 (650)364-9600 FAX(650)364-9233 <br /> s�, + Sequoia 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 /> frill>I� Analytical 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ><ATC Associates, <br /> Client Project ID: Vari D e o &S <br /> 1 Y p/ Irrigation <br /> <s1260 Graphics Drive Matrix: Liquid <br /> r : Modesto, CA 95351-1502 <br /> ...:.Attention: Jeanne Hornsey Work Order#:.:..........9807772 -01-08 Reported: Jul 31, 1998:;:: <br /> L. :: ::::.::::: :::.::.:.: .:::.:..::::::.:.... : <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Lead <br /> i <br /> QC Batch#: ME0716987000MDA <br /> Analy. Method: EPA 239.2 <br /> Prep. Method: EPA 3020 <br /> Analyst: S.LaBarron <br /> MS/MSD#: 980788901 <br /> Sample Cone.: N.D. <br /> Prepared Date: 7/16/98 <br /> Analyzed Date: 7/16/98 <br /> Instrument I.D.#: MTJA6 <br /> rConc.Spiked: 0.050 mg/L <br /> L <br /> Result: 59 <br /> MS % Recovery: 118 <br /> LDup. Result: 55 <br /> MSD% Recov.: 110 <br /> RPD: 7.0 <br /> RPD Limit: 0-20 <br /> L ................. <br /> LCS#: BLK071698 <br /> Prepared Date: 7/16/98 <br /> Analyzed Date: 7/16/98 <br /> Instrument I.D.#: MTJA6 <br /> Conc. Spiked: 0.050 mg/L <br /> LCS Result: 51 <br /> r LCS %Recov.: 102 <br /> L.1 <br /> 75-125 <br /> LCS 80-120 <br /> C 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 i <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 an Ki I <br /> rProject Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9807772.AAA <1> <br /> L.. <br />