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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (5i0) 988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> i <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-4183/960222-L1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9602D89-01-05 Reported Feb 27, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO22396BTEX02A G0022396BTEX02A GCO22396BTEX02A GCO22396BTEX02A <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 Woo J Woo J woo J woo <br /> M S/MSD # 960265705 960265705 960265705 960265705 <br /> Sample Cone . N D N D N D N D <br /> Prepared Date 2/23/96 2/23/96 2/23/96 2/23/96 <br /> Analyzed Date 2/23/96 2/23/96 2/23/96 2/23/96 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Cone Spiked 10pg/L 10pg/L 10pg/L 30pg/L <br /> Result 99 10 99 29 <br /> MS % Recovery 99 100 99 97 <br /> Dup. Result 10 10 10 30 <br /> MSD % Recov .. 100 100 100 100 <br /> RPD 10 00 10 34 <br /> RPD Limit. 0-50 0-50 0-50 0.50 <br /> LCS, # BLK022396 BLK022396 BLK022396 BLK022396 <br /> Prepared Date 2/23/96 2/23/96 2/23/96 2/23/96 <br /> Analyzed Date 2/23/96 2/23/96 2/23/96 2/23/96 <br /> Instrument LD #: GCHP2 GCHP2 GCHP2 GCHP2 <br /> Cone Spiked: 10pg/L 10pg/L 10pg/L 30pg/L <br /> LCS Result 98 94 92 28 <br /> LCS %Recov .. 98 94 92 93 <br /> IVIS/IVISD <br /> LCS 70.130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> esThe LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> aePA 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 /> enanager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9602D89 BLA <2a <br />