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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 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 /> Smith Environmental Client Project ID 94-367, STKN Fire Station 2 <br /> 1260 Graphics Drive Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey Work Order# 9602437 -01-05 Reported Feb 15, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> QC Batch# GCO20896BTEX02A GCO20896BTEX02A GCO20896BTEX02A GCO20896BTEX02A GCO209960HBPEXA <br /> Ana ly Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep. Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 3510 <br /> Analyst: J Woo J Woo J Woo J Woo J Minkel <br /> M S/MSD# 9601 K7001 9601K7001 9601 K7001 96011<7001 960243704 <br /> Sample Conc. N D NO NO N D NO <br /> Prepared Date 2/8/96 2/8/96 2/8/96 2/8/96 2/9/96 <br /> Analyzed Date 2/8/96 2/8/96 2/8/96 2/8/96 2/12/96 <br /> Instrument I D #. GCHP2 GCHP2 GCHP2 GCHP2 GCHP5 <br /> Conc. Spiked 10ug/L 10,ug/L 10ug/L 30u9/L 1000ug/L <br /> Result- 10 9 9 9 8 27 990 <br />. MS % Recovery- 100 99 98 90 99 <br /> Dup Result: 10 10 10 31 910 <br /> MSD % Recov 100 100 100 103 91 <br /> RPD- 00 10 20 14 84 <br /> RPD Limit. 0-50 0-50 0-50 0-50 0-50 <br /> LCS # BLK020896 BLK020&% BLK020896 BLK020896 BLK020996 <br /> Prepared Date. 2/8/96 2/8/96 2/8/96 2/8/96 2/9/96 <br /> Analyzed Date- 2/8/96 2/8/96 2/8/96 2/8/96 2/12/96 <br /> Instrument I D #* GCHP2 GCHP2 GCHP2 GCHP2 GCHP5 <br /> Conc Spiked 10ug/L 10Ng/L 10Ng/L 30ug/L 1000ug/L <br /> LCS Result 10 10 9 7 30 1000 <br /> LCS % Recov 100 100 97 100 100 <br /> MS/MSD <br /> LCS <br /> Control Limits 70-130 70-130 70-130 70-130 38-122 <br /> Please Note <br /> The LCS Is a control sample of known,interferent-fres matrix that is analyzed using the same reagents, <br />.SEQUOIA ANAL L 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 /> V s kalti Interference,the LCS recovery 1s to be used to validate the batch <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9602437 SSS <11> <br /> I <br />