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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 9600 FAX(510)686 9689 <br /> Analytical 819 Straker Avenue Suite 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# 9412F58 01-03 Reported Jars 6, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC122994BTEY02A GC122994STEX02-A GC122994BTEX02A GC122994BTEX02A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method N A N A N A N A. <br /> Analyst J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD # 9412F6515 9412F6515 9412F6515 9412F6515 <br /> Sample Conc N D N D N D NO <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 # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conic Spiked 10,ug/L 10yg/L 10Ng/L 30pg/L <br /> Result 10 10 10 31 <br /> MS% Recovery 100 100 100 103 <br /> Dup Result 9 8 10 10 30 <br /> MSD %Recov 98 100 100 100 <br /> RPD 20 00 00 33 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS # - - - <br /> Prepared Date - - <br /> Analyzed Date* - - <br /> Instrument I D # - <br /> Conc 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 it agents, <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 H <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 <15 <br /> m <br />