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(T—� <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (4151 364 9233 <br /> 404,Il Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> wAnalytical 819 Straker Avenue Suites Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> i <br /> Smith Environmental Client Project ID 18660, 94-331 01-08 <br /> 1260 Graphics Drive Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Hornsey Work Order# 9607J14-02-05 Reported Aug 12, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO80696BTEX22A GC080696BTEX22A GCO80696BTEX2-A GCO80696BTEX22A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method- EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Heister J Heider J Heider J Heider <br /> MS/MSD # 9607G4905 9607G4905 9607G4905 960764905 <br /> Sample Conc N D N D N D N 0 <br /> Prepared Date 8/6/96 8/6/96 8/6/96 8/6/96 <br /> Analyzed Date 8/6/96 8/6/96 8/6/96 8/6/96 <br /> Instrument I D # GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc Spiked 10ug/L 10ug/L long/L 30ug/L <br /> Result: 96 9 8 99 29 <br /> MS % Recovery 96 98 99 96 <br />• Dup Result 93 9 3 9 4 27 <br /> MSD % Recov 93 93 94 91 <br /> RPD 32 52 52 53 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK080696 BLK080696 BLK080696 BLK080696 <br /> Prepared Date 8/6/96 8/6/96 8/6/96 8/6/96 <br /> Analyzed Date 8/6/96 8/6/96 8/6/96 8/6/96 <br /> Instrument I D # GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc Spiked loyg/L 10Ng/L 10ug/L 30ug/L <br /> LCS Result 93 95 94 28 <br /> LCS % Recov 93 95 94 94 <br /> M M D 60-140 60-140 60-140 60-140 <br /> LCS 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 /> SEO7Ankaitis <br /> L I 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 Nthe 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 <br /> Vyta <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9607J14 SSS <3> <br />