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/ <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9Z33 <br /> c] q 404 N.Wlget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> I� 819 Striker Avenue.Suite 8 Sacramento,CA 95834 (916)9Z1-9600 FAX(9t6)9Z1-0100 <br /> Analytical <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 /> 1117 Lone Palm Avenue <br /> Modesto, CA 95351-1502 <br /> Attention: Jeanne Homsey QC Sample Group: 9901328-01, 03-04 Reported: Jan 19, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix: Liquid <br /> Method: EPA 8015 <br /> Analyst: JS <br /> ANALYTE Gasoline <br /> QC Batch #: GCO1 1299BTEX02A <br /> Sampie No.: GW9901328-01 <br /> Date Prepared: 11'12199 <br /> Date Analyzed: 1112199 <br /> Instrument I.D.#: GCHP02 <br /> Sample Cone., ug/L: N.D. <br /> Cone. Spiked, ug/L: 250 <br /> Matrix Spike, ug/L: 280 <br /> % Recovery: 110 <br /> Matrix <br /> - Spike Duplicate, ug/L: 280 <br /> % Recovery: 110 <br /> Relative % Difference: 0.0 <br /> RPD Control Limits: 0-25 <br /> LCS Batch#: GCO112996TEX02A <br /> Date Prepared: 1112199 <br /> Date Analyzed: 1112199 <br /> Instrument I.D.#: GCHP02 <br /> Conc. Spiked, ug/L: 250 <br /> LCS Recovery, ug/L: 290 <br /> LCS % Recovery: 116 <br /> Percent Recovery Control Limits: <br /> MS/MSD 60-140 <br /> F— LCS 70-130 <br /> Quality Assurarice 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 fail within specified control limits due to matrix <br /> K�ayvyaiinterference,the LCS recovery is to be used to validate the batch. <br /> Kayv yai � <br /> Pro ct Manager <br />