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[[ h P I <br /> Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Bates Avenue Suite L Concord,CA 94520 (510) 686-%00' FAX(510)686 9689 <br /> 'war Analytical 819 Striker Avenue Sud,8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> RESNA Client Project ID 150070 01, Chase Chevrolet <br /> 1710 Main Street Matrix LIQUID <br /> Escalon, CA 95320 <br /> Attention Greg Stahl Work Order# 9412F68 08 Reported Jan 6, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GC122994BTEX17A GC122994BTEX17A GC122994BTEX17A GC122994BTEX17A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method NA N A NA NA <br /> Analyst J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD# 9412F6515 9412F6515 9412F6515 9412F6515 <br /> Sample Cone ND ND N D N D <br /> Prepared Date NA NA NA NA <br /> Analyzed Date 12/29/94 12/29/94 12/29/94 12/29/94 <br /> Instrument I D.# GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone. Spiked 10pg/L 10pg/L 10pg/L 30pg/L <br /> Result* 92 98 91 28 <br /> MS % Recovery 92 98 91 93 <br /> Dup Result 10 10 10 30 <br /> MSD % Recov 100 100 100 100 <br /> RPD 83 20 94 69 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS # - - - - <br /> Prepared Date - <br /> Analyzed Date <br /> Instrument I D # <br /> Cone Spiked <br /> LCS Result - <br /> LCS% Recov - - - - <br /> 71-133 72-128 72-130 71-120 <br /> LCS <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 /> Vickie Tague Clark <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9412F68 WAT <4> <br />