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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> ia) 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> Iwo Analytical 819 Striker Avenue Suite 8 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 Homsey Work Order# 9607J14-01 Reported Aug 12, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xyienes <br /> Benzene <br /> OC Batch# GC080596BTEX22A GC080596STEX22A GC080596BTEX22A GCO80596STEX22A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method' EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst M Wang M Wong M Wong M Wong <br /> MS/MSD # 9607G3202 9607G3202 960763202 9607G3202 <br /> Sample Conc N D N D N D N D <br /> Prepared Date. 8/5/96 8/5/96 8/5/96 8/5/96 <br /> Analyzed Date 8/5/96 8/5/96 8/5/96 8/5/96 <br /> Instrument I D # GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc Spiked 10ug/L 10ug/L 10ug/L 30ug/L <br /> Result 88 90 88 26 <br /> MS % Recovery 88 90 88 88 <br />• Dup Result 91 90 90 27 <br /> MSO % Recov 91 90 90 90 <br /> RPD 34 00 22 26 <br /> RPD Limit 025 0-25 0-25 0-25 <br /> LCS # BLK080596 BLK080596 BLK080596 BLK080596 <br /> Prepared Date 8/5/96 8/5/96 8/5/96 8/5/96 <br /> Analyzed Date 8/5/96 8/5/96 8/5/96 8/5/96 <br /> Instrument I D # GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc Spiked 10ug/L 10ug/L 10ug/L 30ug/L <br /> LCS Result 82 83 82 25 <br /> LCS % Recov 82 83 82 82 <br /> MS/MSD- 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 /> $ECN <br /> I 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 matnx <br /> interference the LCS recovery is to be used to validate the batch <br /> VytPr e **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference 9607J14 SSS <2> <br />