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Sequoia 680 Chesapeake Drive Redwood Clty,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> i -1 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-010 0 <br /> 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATG Associates, Inc. Client Project ID: Glover Property 17861.0001 <br /> 1 1 17 Lone Palm Avenue <br /> Modesto, CA 95351-1502 <br /> Attention: Jeanne Homsey QC Sample Group: 9901328-02 Reported: Jan 19, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix: Liquid <br /> Method: EPA 8015 <br /> Analyst: J5 <br /> ANALYTE Gasoline <br /> QC Batch #: GC01 1499BTEX30A <br /> Sample No.: GW9901525-05 <br /> Date Prepared: 1114199 <br /> Date Analyzed: 1114199 <br /> Instrument I.D.#: GCHP30 <br /> Sample Conc., ug/L: N.D. <br /> Conc, Spiked, ug/L: 250 <br /> Matrix Spike, u91L: 270 <br /> % Recovery: 107 <br /> Matrix <br /> Spike Duplicate, ug/L: 260 <br /> % Recovery: 103 <br /> Relative % Difference: 3.8 <br /> RPD Control Limits: 0-25 <br /> LCS Batch#: GCO11499BTEX30A <br /> Date Prepared: 1114199 <br /> Date Analyzed: 1/14199 <br /> Instrument I.D.#: GCHP30 <br /> Conc. Spiked, ug/L: 250 <br /> LCS Recovery, ug/L: 260 <br /> LCS % Recovery: 102 <br /> Percent Recovery Control Limits: <br /> MS/MSD 60-140 <br /> LCS 70-130 <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 rhe 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 yai <br /> P ct Mana <br /> i <br />