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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)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95034 (916)921-9600 FAX(916)921-0100 <br /> IQF1455 McDowell Blvd North,Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> • <br /> Cambria Environmental Tech Client Project ID Shell 341 E Main <br /> 114465th St , Ste C Matrix Liquid <br /> Oakland, CA 94608 <br /> Attention Paul Waite Work Order# 9803F79 08 Reported Apr 10, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GC032798BTEX03A GC032798BTEX03A GCO32798BTEX03A G0032798BTEX03A GC032798BTE)(03A <br /> Anally 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 C DeMartini C DeMartini C DeMartin€ C DeMartinl C DeMartin€ <br /> MS/MSD# 9803C1002 9803131002 9803131002 980SC1002 9803C1002 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date: 3/27/98 3/27/98 3/27/98 3/27/98 3/27/98 <br /> Analyzed Date: 3/27/98 3/27/98 3/27/98 3/27/98 3/27/98 <br /> Instrument 1.113 # GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked. 10 pg/L 10 pg/L 10 ug/L 0 60 mg/Kg 12 mg/Kg <br /> Result 108 11 11 33 63 <br /> • MS % Recovery 108 110 110 110 105 <br /> Dup Result 107 109 109 33 63 <br /> MSD % Recov 107 109 109 110 105 <br /> RPD 093 091 091 00 00 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS #- BLK032798 BLK032798 BLK032798 BLK032798 BLK032798 <br /> Prepared Date 3/27/98 3/27/98 3/27/98 3/27/98 3/27/98 <br /> Analyzed Date 3/27/98 3/27/98 3/27/98 3/27/98 3/27/98 <br /> Instrument 1.13 # GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10,ug/L 10 Ng/L 10 ug/L 0 60 mg/Kg 1 2 mg/Kg <br /> LCS Result 105 106 107 33 62 <br /> LCS % Recov. 105 106 107 110 103 <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 /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> .SEQUOIA AN YTIC L 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 M <br /> the recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Richard Herling <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9803F79 CCC <3> <br />