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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> rY _ 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> +.{," ]r},i r , r " I-`F ' {M i C4 ♦ r ,i3 t + r t + r W,, n+n vv v r u }n <br /> '�E AA Engineering Science&Tech Client Project ID Exxon 7-3942, 83739421307h z< <br /> yt3468 Mt Diablo Blvd , Ste 8-100 Matrix Liquid <br />' Lafayette, CA 94549 <br /> Reported May <br /> Work Order# 9505983-09 13-14 V 23, i995A <br /> Attention T Faulkner � Mx�� �;.� „��«�.�v���A��N f,�.�v `rHw Yn ,Y' f�"�:�rik <br /> `or v <br /> vvr- <br />' QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xylenes <br />' Benzene <br /> QC Batch#. GC051895BTEX03A GCO518958TEX03A GCO51895BTEX03A G0051895BTEX03A <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 /> M S/MSD #- 950598206 950598206 950598206 950598206 <br />' Sample Conc ' N D N D N D N D <br /> Prepared Date 5/18/95 5/18/95 5/18/95 5/18/95 <br /> Analyzed Date 5/18/95 5/18/95 5/18/95 5/18/95 <br /> Instrument LD # GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked. 10Ng/L 10yg/L 10Ng/L 30ug/L <br /> Result 10 10 99 30 <br /> MS %Recovery 100 100 99 100 <br /> Dup. Result 98 10 99 30 <br /> MSD % Recov • 98 100 99 100 <br /> RPD: 20 00 00 00 <br /> RPD Limit 0.50 0.50 0-50 0-50 <br /> '°"...., Y�YA <br /> ,+ .y <br /> .�.�ao.;�,`;vac,s,.:.,..,. u.,ao <br /> LCS# - - - - <br /> Prepared Date: - - - - <br /> Analyzed Date <br />' Instrument I D #. <br /> Conc. Spiked. <br /> LCS Result - - <br /> LCS %Recov - - - - <br />' MS/MSD <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,interferent-fres matrix that is analyzed using the same reagents, <br /> VegaggyPenner <br /> NALYTICAL 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 /> Project Manager *"MS-Matrix Spike,MSD-MS Duplicate,RPD=Relative%Difference 9505983 EEE a4> <br />