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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 tAAk650)364.9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> V <br /> e'11 1267 Country <br /> "[3larie Tech Services, lnc. Client Project ID: the ry <br /> 1680 Rogers Ave. Matrix: Liquid <br /> 'San Jose, CA 95112 . <br /> :sAttentio <br /> n: Fran T <br /> hie Work Order#: 9802J20-03-04, 07 Reported: Mar 20, 19981.>r <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#: GCO311986TEX21A GCO31198BTEX21A GCO31198BTEC21A GC031198BTEX21A G0031198BTEX21A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: C.DeMartini C.DeMartini C.DeMartini C.DeMartini C.DeMartini <br /> MS/MSD#: 980361501 980361501 980361501 980361501 980361501 <br /> Sample Conc: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 3/11/98 3/11/98 3/11/98 3/11/98 3/11/98 <br /> Analyzed Date: 3/11/98 3/11/98 3/11/98 3/11/98 3/11/98 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked: 10 pg/L 10 pg/L 10 pg/L 30 fug/L 60 pg/L <br /> Result: 10 9.8 10 30 51 <br /> MS %Recovery: 100 98 100 100 85 <br /> Dup. Result: 11 10 11 31 52 <br /> MSD %Recov.: 110 100 110 103 87 <br /> RPD: 9.5 2.0 9.5 3.3 1.9 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS #: BLK031198 BLK031198 BLK031198 ELK031198 BLK031198 <br /> Prepared Date: 3/11/98 3/11/98 3/11/98 3/11/98 3/11/98 <br /> Analyzed Date: 3/11/98 3/11/98 3/11/98 3/11/98 3/11/98 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked: lopg/L 10pg/L 10pg/L 30pg/L 60pg/L <br /> LCS Result: 11 10 11 32 52 <br /> LCS %Recov.: 110 100 110 107 = .S7 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note: <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> VEQU11MA A ALYTICAL 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. H 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 /> nner <br /> anager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9802J20.BLA <2> <br />