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Sequoia 680 Chesapeake Drive Redwood Gry CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> 404 N Wiget Lane vvalnu(Creek CA 94598 {510)988 9600 FAX(slo)988 9673 <br /> 819 Striker ke� Avenue 5u9 8 Sacramento CA 95834 (907' 921 792 8605 FAX �107 792 01040 <br /> Analytieal <br /> 1455 McDowell Blvd Norch Ste D feralumi CA 94954 (707? <br /> 79Z <br /> Environmental Consultants Client Project ID Exxon 7-3708 D093-809 <br /> 3164 Gold Camp Drive, #200 Matrix Liquid <br /> Rancho Cordova, CA 95670 Reported Apr 10, 1998 <br /> Attention Jim Brownell Work Order # 9803L29-08, 09 P <br /> QUALITY CONTROL DATA REPORT <br /> Xylenes Gas <br /> Analyte Benzene Toluene Ethyl X Y <br /> Benzene <br /> QC Batch# Gc04069813TEX06A GC0406988TEX06A GCG40698BTEX06A GC040698BTD(C)6A GCOEPA 015M06A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> J Minkel <br /> Analyst J Minkel J Minkel J Minkel J Minkel 9803H1804 <br /> MS/MSD # 9803H1804 9803H1804 9803H1804 9803H1804 N D <br /> Sample Conic N D N D N D N D <br /> Prepared Date 4/6/98 4/6/98 4/6/98 4/6/98 4/6/98 <br /> 4/6/98 <br /> Analyzed Date 4/6/98 4/6/98 4/6/98 4/5/98 <br /> y GCH <br /> GCHP6 Ps <br /> Instrument I D # GCHP6 GCHP5 GCHP6 GG HP6pg/L 6GY P6 <br /> Conc Spiked 10ug/L 10ug/L 1Gug/L <br /> Result B 6 85 a 6 25 54 <br /> �M5 % Recovery as 95 <br /> e6 1RG 90 <br /> r 9 2'1 �O <br /> Sup Resul, 7 9 f 9 83 <br /> MSC % Recov 79 f8 19 BO <br /> RPD 85 73 a5 41 it <br /> R P D Limit 0-25 <br /> 0-25 0-25 0-25 G-25 <br /> LCS # BLK040698 BLK040698 BLK040698 BLKG40696 BLK040698 <br /> Prepared Oats 4/13/984/6/98 4/6/98 4/6/98 4/6/98 <br /> 4/6/98 <br /> Analyzed Date 4/6/98 4/6/9a a/s/sa 4/6/9a GCHP6 <br /> Instrument I ❑ # GCHP6 GCHP6 GCHP6 GCHP6 <br /> Conc Spiked 10ug/L 10ug/L 10ug/ 3Gug/L sGug/L <br /> LCS Result 91 9 0 91 28 58 <br /> LCS % Recov 91 90 91 93 97 <br /> IVIS 60-140 60-140 60 60-140 60-140 <br /> -140 7(}.130 <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 /> 10E000IA ANALYTICAL preparation and analytical methods empicyed 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 1s to be used to validate the batch <br /> gory 9803429 DLT "2' <br /> I <br /> r0 Manager *MS=Matrix Spike MSD -MS Duplicate RPD--Relative Difference <br />