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+k r <br /> � 10680 Chesapeake Drive Redwood City,CA 94063—(415) 364 9600 FAX(415) 364 9233 <br /> Sequoia <br /> '"� 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> a%,1a Anaytea1 919 Striker Avenue,Suite 8 Sacramento, CA 95934 (916) 921 9600 FAX (916)921 0100 <br /> L{v..y• {r } ` A r xnv p{ { r{ rx r.. i {8 —`. <br /> { r x <br /> vv <br /> ;YGettl{er Ryan/Geostrategiesr x tr diem Protect ID Uriocal 4707 Pacific Ave <br /> }6747 Sierra Court, Ste J Matrix Liquid <br /> ',Dublin, CA 94568 <br /> Reported Jun 3, 199W' <br /> },Attention Greg Gurss Work Order# 9605104 -01M1, <br /> $.4 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO52996BTEX17A GC052996BTEX17A GC052996BTEX17A GCO52996BTEX17A <br /> Analy Method EPA 8020 EPA 8020 EPA 6020 EPA 8020 <br /> Prep. Method. EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. J woo J woo J woo J woo <br /> MS/MSD # G9605D77-12B G9605D77-12B G9605D77-12B G9605D77-12B <br /> Sample Cone N D N D N D N D <br /> Prepared Date: 5/29/96 5/29/96 5/29/96 5/29/96 <br /> Analyzed Date- 5/29/96 5/29/96 5/29/96 5/29/96 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conic Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> Result 9 0 8 7 8 4 24 <br /> •MS %Recovery 90 87 84 80 <br /> Dup Result 81 79 76 22 <br /> MSD % Recov 81 79 76 73 <br /> RPD 11 96 10 87 <br /> RPD Limit. 0-25 0-25 0-25 0-25 <br /> LCS#: GBLK052996A GBLK052996A GBLK052996A GBLK052996A <br /> Prepared Date 5/29/96 5/29/96 5/29/96 5/29/96 <br /> Analyzed Date. 5/29/96 5/29/96 5/29/96 5/29/96 <br /> Instrument I D #- GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Result: 93 91 90 27 <br /> LCS % Recov. 93 91 90 90 <br /> 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 /> •SEQUOIA ANALYTICAL 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 /> Mike Gregory <br /> Protect Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9605104 GET 41> <br />