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Sequoia 404 N. , CA Lane <br /> Walnut Creek, CA 94598 <br /> kc- ) (925) <br /> 00 <br /> Analytical 988-96 <br /> FAX(925)988-967373 <br /> Roy F. Weston, Inc. Client Project ID: Home Depot, Tracy <br /> 2300 Clayton Rd., Ste 1580 Matrix: Liquid <br /> Concord, CA 94520 <br /> Attention: Scott Lookingbill QC Sample Group: 9050775-777 Reported: Jul 9, 1999. <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: 2,4-D 2,4,5-T 2,4,5-T <br /> (Silvex) <br /> QC Batch#: 9070302 9070302 9070302 <br /> Analy. Method: EPA 8151 EPA 8151 EPA 8151 <br /> Prep. Method: EPA 3510B EPA 35106 EPA 3510B <br /> Analyst: Morgan Hill Morgan Hill Morgan Hill <br /> MS/MSD#: BLK051999 BLK051999 BLK051999 <br /> Sample Conc.: N.D. N.D. N.D. <br /> Prepared Date: 6/19/99 6/19/99 6/19/99 <br /> Analyzed Date: 6/23/99 6/23/99 6/23/99 <br /> Instrument I.D.#: - - - <br /> Conc. Spiked: 10Ng/L 10pg/L 10Yg/L <br /> Result: 7.6 8.7 8.4 <br /> MS % Recovery: 76 87 84 <br /> Dup. Result: 7.4 8.6 8.3 <br /> MSD % Recov.: 74 86 83 <br /> RPD: 2.7 1.2 1.2 <br /> RPD Limit: 0-50 0-50 0-50 <br /> LCS #: <br /> Prepared Date: <br /> Analyzed Date: <br /> Instrument I.D.#: <br /> Conc. Spiked: <br /> LCS Result: <br /> LCS % Recov.: - - <br /> ILCS 30-150 30-150 30-150 <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, #1210 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 /> USM l�v�_ �Lry the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Dinterference,the LCS recovery is to be used to validate the batch. <br /> Yulianne Fegley **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager <br /> 9050775.RFW <19> <br />