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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)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc. Client Project ID: Stkn Smith Cana1162574.0002 <br /> 1260 Graphics Drive <br /> Modesto, CA 95351.1502 <br /> Attention: Jeanne Homsey QC Sample Group: 9807H38-01-04 Reported: Aug 7, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix: Liquid <br /> Method: EPA 8015A <br /> Analyst: G. Wardle <br /> ANALYTE Diesel <br /> QC Batch ft: GC0730980HBPEXA <br /> LCS ID: BLK073098AS <br /> Date Prepared: 7130198 <br /> Date Analyzed: 7130198 <br /> Instrument I.D.#: GCHP5B <br /> Cone. Spiked, ug/L: 1000 <br /> Blank Spike, ug/L: 900 <br /> % Recovery: 90 <br /> Blank <br /> Spike Duplicate, ug/L: 830 <br /> % Recovery: 83 <br /> Relative % Difference: 8.1 <br /> % Recovery <br /> Control Limits: 50-150 <br /> RPO Control Limits: 0-50 <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 /> -i <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 /> Ka n Kimya' <br /> Project Man ger <br />