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a, <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 4u4 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 /> Blalne Tech Services, Inc Client Project ID Chevron 9-1918/950727-K2 V n <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> 'Attention Jim Keller Work Order# 9507162-06 Reported Aug 8, 1995ry <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene ' <br /> OC Batch# GCO80195BTEX03A GCO80195BTEX03A GC080195BTEX03A GCO80195BTEX03A <br /> Anally. 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# 9507119903 9507H9903 95071-19903 9507H9903 <br /> Sample Cone ND ND ND N D <br /> Prepared Date 8/1/95 8/1/95 8/1/95 8/1/95 <br /> Analyzed Date 8/1/95 8/1/95 8/1/95 8/1/95 <br /> Instrument l D # GCHP3 GCHP3 GCHP3 GCHP3 <br /> Cone Spiked 10pg/L 10yg/L 10ug/L 30Ng/L <br /> Result 11 11 11 33 <br /> MS %Recovery 110 110 110 110 <br /> Dup Result 11 10 93 28 <br /> MSD % Recov 110 100 93 93 <br /> RPD 00 95 17 16 <br /> RPD Limit 0-50 0-50 0-50 050 <br /> LCS <br /> Prepared Date - - - - <br /> Analyzed Date - - - - <br /> Instrument LD #. - - - <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,interferent-tree matrix that is analyzed using the same reagents, <br /> 7aeggy <br /> IA 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 M <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 /> Penner <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9507162 BLA <3> <br />