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.. ................. . <br /> 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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95634 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID: Glover Property 17861.0001 <br /> 1260 Graphics Drive <br /> Modesto, CA 95361-1502 <br /> Attention: Jeanne Homsey QC Sample Group: 9806126-01,-04 Reported: Jul 10, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix: Liquid <br /> Method: EPA 8015 <br /> Analyst: A. MIRAFTAB <br /> ANALYTE Gasoline <br /> QC Batch#: GC070598BTEX17A <br /> Sample No.: GW9806G65-7 <br /> Date Prepared: 715198 <br /> Date Analyzed: 715198 <br /> Instrument I.D.#: GCHP17 <br /> Sample Cone., uglL: N.D. <br /> Cone. Spiked, uglL: 250 <br /> Matrix Spike, ug/L: 220 <br /> % Recovery: 88 <br /> Matrix <br /> Spike Duplicate, uglL: 230 <br /> % Recovery: 92 <br /> Relative % Difference: 4.4 <br /> RPD Control Limits: 0-25 <br /> LCS Batch#. GWBLK070598ABS <br /> Date Prepared: 715198 <br /> Date Analyzed: 715198 <br /> Instrument I.D.#: GCHP17 <br /> Cone. Spiked, ug/L: 250 <br /> LCS Recovery, ug/L: 230 <br /> LCS % Recovery: 92 <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 /> u fortified with known quantities of specific compounds and subjected to the entire analytical procedure. It <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 /> �y,,nw <br /> Project Manager <br />