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Sequoia 680 Chesapeake Dnve 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)986-%73 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategles Client Project ID Chevron, 9-6171 Stockton <br /> 6747 Sierra Court, Ste J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Argy Leyton Work Order# 9503B53 -06 Reported Mar 29, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GCG32095BTEX03A GCO32095STEX03A GC032095BTEX03A GC032095BTEX03A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD# G9503A15-11 B G9503A15-11 B G9503A15-11 B G9503A15-11 B <br /> Sample Conc N D N D N D N D <br /> Prepared Date 3/20/95 3/20/95 3/20/95 3/20/95 <br /> Analyzed Date 3/20/95 3/20/95 3/20/95 3/20/95 <br /> Instrument I D # GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> Result 10 10 99 30 <br /> MS % Recovery 100 100 99 100 <br />` Dup Result 11 10 10 31 <br /> MSD % Recov 110 100 100 103 <br /> RPD 95 00 10 33 <br /> RFD 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 /> LCS 71-133 72-128 72-130 71-120 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent4ree matrix that is analyzed using the same reagents, <br /> QIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> n fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> G 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 /> ' dike Grego <br /> Project Manag r **MS=Matrix Spike,MSD=MIS Duplicate,RPD=Relative% Difference 95031353 GET <3> <br />