Laserfiche WebLink
y • a 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364--9233 <br /> • Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0 100 <br /> ��� ���� 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650) 232-9612 <br /> 10Slalne Tech Services Client Project 1t) Chevron #9-9840, Stockton <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Christine Lillie QC Sample Group 9061129-132 Reported Jun 28, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO61799 GCO61799 GCO61799 GC061799 <br /> 8020024 802002A 802002A 802002A <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 Minkel J Minkel J Minkel J Minkel <br /> MS/MSD # 9061053 9061053 9061053 9061053 <br /> Sample Conc N D ND N D N D <br /> Prepared Date 6/17/99 6/17/99 6/17/99 6/17/99 <br /> Analyzed Date 6/17/99 6/17/99 6/17/99 6/17/99 <br /> Instrument 1 D # HP-2 HP-2 HP-2 HP-2 <br /> Conc Spiked 20ug/L 20pg/L 20Ng/L 6opg/L <br /> Result * * * *No spike added tD sample <br /> Mrs % Recovery * * * due to laboratory error <br /> Dup Result <br /> MSD % Recov <br /> RPD <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS # 2LCS061799 2LCS061799 2LCS061799 2LC8061799 <br /> Prepared Date 6/17/99 6/17/99 6/17/99 6/17/99 <br /> Analyzed Date 6/17/99 6/17/99 6/17/99 6/17/99 <br /> Instrument I ❑ # HP-2 HP-2 HP-2 HP-2 <br /> Conc Spiked 20,ug/L 20pg/L 20 frg/L 60lrg/L <br /> LCS Result 19 17 18 60 <br /> LCS % Recov 95 85 90 100 <br /> LCSD Result 19 18 18 59 <br /> LCSD % Recov 95 90 90 98 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> I <br /> I <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, #1271 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> r /) fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> acovery of analytes from the matrix spike does not fall withrn specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> ellA Brewer ** <br /> M =Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference <br /> Projectect Manager <br /> 9061129 BTS <8> <br />