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W •' "Iy" 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 /> x,117 Analytical 815 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 931 9600 FAX(916)921 0100 <br /> Smith Environmental Client Project 1D 94-331 01-07 <br /> 1260 Graphics Drive Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey Work Order# 9612567-01-06 Reported Dec 26, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloro- Tnchloro- Chloro <br /> ethene ethene Benzene <br /> QC Batch# GC121996801015A GC121996801015A GC121996801015A <br /> Analy Method EPA 8010 EPA 8010 EPA 8010 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 <br /> Analyst B Ali B Ali B Ali <br /> MS/MSD # 9612A3304 9612A3304 9612A3304 <br /> Sample Conc N D N D N D <br /> Prepared Date 12/19/96 12/19/96 12/19/96 <br /> Analyzed Date 12/19/96 12/19/96 12/19/96 <br /> Instrument I D # GCHP15 GCHP15 GCHP15 <br /> Conc Spiked 25Ng/L 25ug/L 25ug/L <br /> Result 24 26 30 <br />. MS % Recovery 96 104 120 <br /> Dup Result 22 24 26 <br /> MSD % Recov 88 96 104 <br /> RPD 87 80 14 <br /> RPD Limit 0-25 025 025 <br /> LCS # BLK121996 BLK121996 BLK121996 <br /> Prepared Date 12/19/96 12/19/96 12/19/96 <br /> Analyzed Date 12/19/96 12/19/96 12/19/96 <br /> Instrument I D # GCHP15 GCHP15 GCHP15 <br /> Conc Spiked 25frg/L 25kg/L 25ug/L <br /> LCS Result 24 23 26 <br /> LCS Recov 96 92 104 <br /> MS/MSD 60-140 60-140 60-140 <br /> LCS 65-135 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 /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> S r 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 /> °� L1! interference,the LCS recovery is to be used to validate the batch <br /> Vytas Ankattis **MS=Matnx Spike,MSD=INS Duplicate RPD=Relatcve Difference <br /> Project Manager 9612567 SSS <4> <br />