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A Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988%73 <br /> ftill7 Analytical 819 Stnkcr Avenue,Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX (916) 921 0100 <br /> r <br /> Blaine Tech Services, Inc Client Project 1D Shell Stockton / 980210-A2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9802738-05 Reported Feb 27, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#. GCO22198802002A GCO22198802002-A GCO22198802002A GCO22198802002A GCO22198802002A <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 /> Analyst. K Nill K Nill K Nill K Nill K Nill <br /> MS/MSD # 8020866 8020866 8020866 8020866 8020866 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 2/21/98 2/21/98 2/21/98 2/21/98 2/21/98 <br /> Analyzed Date 2/21/98 2/21/98 2/21/98 2/21/98 2/21/98 <br /> Instrument I D #' HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20pg/L 20pg/L 20pg/L 60pg/L 300jug/L <br /> Result 20 20 20 63 350 <br /> MS % Recovery 100 100 100 105 117 <br /> goDup Result- 20 20 20 64 350 <br /> MSD % Recov 100 100 100 107 117 <br /> RPD 00 00 00 16 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS # LCS02-2198 LCS022198 LCS022198 LCS022198 LCS022198 <br /> Prepared Date 2/21/98 2/21/98 2/21/98 2/21/98 2/21/98 <br /> Analyzed Date 2/21/98 2/21/98 2/21/98 2/21/98 2/21/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc. Spiked 20pg/L 20pg/L 20pg/L 60,ug/L 300ug/L <br /> LCS Result- 20 20 20 63 340 <br /> LCS % Recov 100 100 100 105 113 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> SEQ IA A LYTICAL The LCS is a control sample of known,interferent-tree matrix that is analyzed using the same reagents, <br /> # 27 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 /> PUn-erPnager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9802738 SLA <2> <br />