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Sequoia 680 Chesapeake Drive Redwood City.CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N"Wlget 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)9Z1-0100 <br /> Analytical 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-034Z <br /> ATC Associates, Inc. Client Project ID: Stkton Smith Canal 62574.0002 <br /> 1 1 1 7 Lone Palm Avenue <br /> Modesto, CA 95351-1502 <br /> Attention: Jeanne Homsey QC Sample Group: 9901698-01-05 Reported: Jan 23, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix: i.iquid <br /> Method: EPA 8015A <br /> Analyst: A. PORTER <br /> ANALYTE Diesel <br /> QC Batch #: GC01 18990HBPEXB <br /> Sample No.: 9901737-08 <br /> Date Prepared: 1/18199 <br /> Date Analyzed: '/19/99 <br /> Instrument I.D.#: GCHP48 <br /> Sample Conc., ug/L-- 950 <br /> Conc. Spiked, ug/L: 1000 <br /> Matrix Spike, ug/L: 2200 <br /> % Recovery: 125 <br /> Matrix <br /> Spike Duplicate, ug/L: 2200 <br /> % Recovery: 125 <br /> Relative % Difference: 0"0 <br /> RPD Control Limits: 0-50 <br /> LCS Batch#: BLK0118998S <br /> Date Prepared: 1118199 <br /> Date Analyzed: 1119/99 <br /> Instrument I"D.#: GCHP48 <br /> Conc. Spiked, ug/L: 1000 <br /> Recovery, ug/L-- 880 <br /> LCS % Recovery: 88 <br /> Percent Recovery Control Limits: <br /> MSIMSO 50-150 <br /> LCS 60-140 <br /> Quality Assurance Statement: All standard operating procedures and quality control requirements have been met" <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 /> 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 /> Kayv-an Kim f' <br /> -Project Manager <br />