Laserfiche WebLink
Sequoia 680 Chesapeake Dnvc Redwood Cary CA 94063 (650) 364 9640 FAX(6501 364 9233 <br /> 404 N Wiget Lanc Walnut Creek CA 94598 (510) 988 9600 FAX(510)9Q8 9673 <br /> 114I,,IF Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br />' E A Engineering Science &Tech Client Project ID Exxon 7-3942, 5153942 1300 <br /> 3468 Mt Diablo Blvd , Ste B-100 Matrix Liquid <br /> Lafayette, CA 94549 <br /> Attention Christa Marting Work Order# 9803307 23 Reported Apr 3, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br />' Benzene <br /> QC Batch# GC031498BTEX21A GC031498BTEX21A GCO31498BTEX21A GC031498BTEX21A GC0314986TEX21A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> rAnalyst C DeMartini C DeMartini C DeMartini C Delvlartini C DeMartini <br /> MS/MSD # 980305202 980305202 980305202 980305202 980305202 <br /> Sample Conic N D N D N D N D N D <br />' Prepared Date 3/14/98 3/14/98 3/14/98 3/14/98 3/14/98 <br /> Analyzed Date 3/14/98 3/14/98 3/14/98 3/14/98 3/14/98 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br />' Cono Spiked 10ug/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> Result 99 93 93 27 53 <br /> MS %Recovery 99 93 93 90 88 <br /> Dup Result 11 98 99 30 55 <br /> MSD % Recov 110 98 99 100 92 <br />' RPD 11 52 62 11 37 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK031498 BLK031498 BLK031498 BLK031498 BLK031498 <br /> 03 98 <br />' Prepared Date 3/14/98 3/14/98 3/14/98 3/14/98 3/14/98 <br /> Analyzed Date 3/14/98 3/14/98 3/14/98 3/14/98 3/14/98 <br /> Instrument i D # GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10ug/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> LCS Result 10 96 99 30 50 <br /> LCS % Recov 100 96 99 100 83 <br /> 1 <br /> 60-140 60-140 60.140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 7p-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 /> SEQUOIA 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 /> Vichard Herling <br /> Project Manager **MS=Matrix Spike MSD=MS Duplicate, RPD=Relative %Difference 9803305 EEE <107 <br />