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' Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (650) 3649600 FAX(650)364.9233 <br /> 404 N.Wiget Lane Walnut Creek, CA 94598 (510) 988-9600 FAX (5 10)988.9673 <br /> fr�ll� Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95934 (916) 921.9600 FAX(916)92 1-0100 <br /> . <br /> Blaine Tech Services, Inc. Client Project ID Chevron 9-0557' 971124- S2 <br /> 1680 Rogers Ave. Matrix: Liquid <br /> San Jose, CA 95112 <br /> 'Attention: Fran Thie Work Order#: 9711 G09-07 Reported: Dec 22, 1997. <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#: GC120597BTEXOIA GC120597BTEXOIA GC120597BTEX01A GC120597BTEXOIA GC120597BTEX01A <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 #: 9711E9603 9711E9603 9711E9603 9711E9603 9711 E9603 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 12/5/97 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Analyzed Date: 12/5/97 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Instrument I.D.#: GCHPI GCHP1 GCHP1 GCHP1 GCHPI <br /> Conc. Spiked: 10pg/L 10pg/L 10pg/L 30pg/L 60pg/L <br /> Result: 8.4 9.3 9.0 27 56 <br /> MS % Recovery: 84 93 90 90 93 <br />. Dup. Result: 9.3 11 10 32 66 <br /> MSD % Recov.: 93 110 100 107 110 <br /> RPD: 10 17 11 17 16 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS#: BLK120597 BLK120597 BLK120597 BLK120597 BLK120597 <br /> Prepared Date: 12/5/97 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Analyzed Date: 12/5/97 12/5/97 12/5/97 112/5/97 12/5/97 <br /> Instrument I.D.#: GCHP1 GCHP1 GCHP1 GCHPI GCHP1 <br /> Conc. Spiked: 10pg/L 10pg/L 10pg/L 30pg/L 60pg/L <br /> LCS Result: 10 11 11 34 69 <br /> LCS % Recov.: 100 110 110 113 115 <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 /> SE OI AN LYTICAL 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 fall within specified control limits due to matrix <br /> interference,the LCS recovery Is to be used to validate the batch, <br /> g9y inner <br /> P Manager ••MS=Matrix Spike,MSD=MS Duplicate,RPD=Rotative%Difference 9711G09.BLA 44> <br />