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Sequo* 68Qapeak e! Drive Redwood City,CA 940Q (650)364-%00 FAX(650)36419233Se <br /> ia <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 (916)921-9600 FAX(916)921-bioo <br /> Analytical 1455 McDowell Blvd.North,Ste.0 Petaluma,CA 94954 (707)792-1865 FAX(707)792-6342 <br /> -:-::ATC Associates, 16cClient Project ID': Rosetti's m6rket <br /> 1260 Graphics Drive <br /> Matrix: Solid <br /> ;:;Modesto, CA 95351-1502 <br /> 11 <br /> N.::;Attention: Jeanne Hornsey Work Clrder,4: 9807057 -04 Reported: Jul 15, <br /> X, <br /> QUALITY CONTROL DATA REPORT <br /> Analyte., MTBE it i <br /> QC Batch#: MS070198MTE3EE)(A <br /> Analy. Method: EPA 8260 <br /> Prep. Method: N.A. <br /> Analyst: S.Ooldstain <br /> MS/MSD #: 98061-18702 <br /> Sample Cone.: N.D. <br /> Prepared Date: 7/1/98 <br /> Analyzed Date: 7/2/98 <br /> Instrument I.D.#: :,H6 <br /> Cone. Spiked: 2500 pg/Kg <br /> Result., 2200 <br /> MS% Recovery: !88 <br /> Dup. Result: 2200 <br /> MSD %Recov,: 811 <br /> RPD: 0.0 <br /> RPD Limit: 0-25 <br /> .......... <br /> ................. .. .......... <br /> .............– <br /> ............ ...... ... <br /> ......................... .. <br /> X..x.— <br /> E ......... . <br /> LCS#: LC5070798 II <br /> Prepared Date: 7/7/98 <br /> Analyzed Date: 7/7/98 <br /> Instrument 1,D,#: 1-16 <br /> Cone. Spiked: 2500 pg/Kg <br /> it C <br /> LCS Result: 2300 <br /> LCS % Recov.- 92 <br /> MS/MSD 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> ii <br /> Please Note: II <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 saidple <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedur4. If <br /> the recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch. i:L—i <br /> �Kimy <br /> Project Manager MS=Matrix Spike,MSO=MS Duplicate,RPD=Relative%Difference 9807057.AAA <4 <br />