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Sequoia 660 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wioct Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> �1,�► Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br />' B A EngineeringScience &Tech Client Project ID Exxon 7-3 42 <br /> j 9 , 5153942 1300 <br /> 3468 Mt Diablo Blvd , Ste B-100 Matrix Liquid <br />' Lafayette, CA 94549 <br /> a Attention Tracy Faulkner Work Order# 9611209 03, 04, 07-09 Reported Nov 14, 1996 <br /> v, v n <br />' QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br />' Benzene <br /> QC Batch# GC110796BTEX20A GC110796BTEX20A GC110796BTEX20A GC110796STEX20A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst G Fish G Fish G Fish G Fish <br /> MS/MSD#• 961105901 961105901 961105901 961105901 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 11/7/96 11/7/96 11/7/96 11/7/96 <br /> Analyzed Date 11/7/96 11/7/96 11/7/96 11/7/96 <br />' Instrument I D # GCHP20 GCHP20 GCHP20 GCHP20 <br /> Conc. Spiked 10Mg/L 10pg/L 10pg/L 30pg/L <br /> Result 11 91 87 25 <br /> MS %Recovery 110 91 87 83 <br /> Dup Result 11 83 811 24 <br /> MSD % Recov 110 83 81 80 <br />' RPD 00 92 71 41 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> 1 M. 'rr <br /> x iryV i <br /> ,i xb4. war{ 4 r{h <br /> LCS # BLK110796 BLK110796 BLK110796 BLK110796 <br />' Prepared Date. 11/7/96 11/7/96 11/7/96 11/7/96 <br /> Analyzed Date 11/7/96 11/7/96 11/7/96 11/7/96 <br />' <br /> Instrument LD * GCHP20 GCHP20 GCHP20 GCHP20 <br /> Conc Spiked 10Ng/L 10Ng/L 10 fig/L 30pg/L <br /> LCS Result 11 84 82 25 <br />' LCS % Recov 110 84 62 83 <br />' 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br />' The LCS is a control sample of known,Interferent-free matrix that is analyzed using the same reagents, <br /> SE-01.101A.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 /> even Follett <br /> tProject Manager **MS=Matrix Spike,MSD-MS Duplicate, RPD=Relative%Difference 9611209 EEE <2> <br />