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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 Sutker Avenue Suite 8 Sacramento CA 95834 <br /> (916) 921 9600 FAX(916)921 0100 <br /> Smith Environmental Client Project ID Qulckstop 132, 94-273-94-10 <br /> 441 N Whisman, Bldg 23 Matrix Liquid <br /> Mountain View, CA 94043 e <br /> Attention Rich Garlow Work Order# 9603383 05 Reported Mar 18, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# G0031196BTEX2IA GC031196BTEX21A GC031196BTEX21A GC031196BTEX21A _ <br /> Analy-Method EPA 8020 EPA 6020 EPA 8020 EPA 8020 <br /> Prep. Method. EPA 5030 EPA 5030 EPA 5030 EPA 5030 ' <br /> Analyst J woo .1 woo J woo J woo <br /> MS/MSD# 960318008 - 960318008 960318008 960318008 <br /> Sample Conc : N D N D N D N D ' <br /> Prepared Date 3/11/96 3/11/96 3/11/96 3/11/96 <br /> Analyzed Date 3/11/96 3/11/96 3/11/96 3/11/96 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked. 10Ng/L 10119/L 10ug/L 30pg/L , <br /> Result 11 11 11 32 <br /> MS % Recovery 110 110 110 107 <br /> Dup Result 10 10 97 31 <br /> MSD % ReCov 100 100 97 108 <br /> RPD 95 95 13 32 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS #. BLK031196 BLK031196 BLK031196 BLK031196 <br /> Prepared Date 3/11/96 3/11/96 3/11/96 3/11/96 ' <br /> Analyzed Date 3/11/96 3/11/96 3/11/96 3/11/96 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked: 10fr9/L 10Ng/L 10jig/L 30yg/L <br /> LCS Result 11 11 11 34 <br /> LCS % Recov .. 110 110 110 113 ' <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 /> SEQUOIA ALYTI AL 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 /> Vyta Aka s <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9603383 SSS <3> ' <br />