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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> } �q <br /> 404 N W[get Lane Walnut Creek CA 94598 (925)988-9600 FAX(9Z5)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9Z1-0100 <br /> q, 4') Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 rAX(707)792-0342 <br /> 1551 industrial!toad San Carlos,CA 940704111 (650)232-9600 FAX(650)232 9612 <br /> Blaine Tech Services, Inc Client Project ID Shell 341 East Main St , Ripon <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA- 95112 - - - - - - - -- -- -- s= -- - -- -- - - -_ - - -r- <br /> Attention Fran Thie Work Order# 9902163-01 deported Feb 23, 1999 <br /> - QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> Benzene <br /> QC_Batch#- _GCO212998020.02-A_G_CO21_2-99802002A__GCO21299802002A_ GCO21299802002A GCO21299802002A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA S015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst C Westwater C Westwater C Westwater C Westwater C Westwater <br /> MS/MSD# 9020557 9020557 9020557 9020557 9020557 <br /> Sample Conc N D N D ND N D N D <br /> Prepared Date 2/12/99 2/12/99 2/12/99 2/12/99 2/12/99 <br /> Analyzed Date 2/12/99 2/12/99 2/12/99 2/12/99 2/12/99 <br /> Instrument LD# HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20 ug/L 20 ug/L 20 ug/L 60 ug/L 310 ug/L <br /> Result 22 18 20 62 320 <br /> MS %Recovery 110 90 100 103 103 <br /> Dup ResuR 23 19 20 63 320 . <br /> MSD%Recov 115 95 100 105 103 <br /> RPD 44 54 00 16 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS# LCS021299 LCS021299 LCS021299 LCS021299 LCS021299 <br /> Prepared Date 2/12/99 2/12/99 2/12/99 2/12/99 2/12/99 <br /> Analyzed Date 2/12/99 2/12/99 2/12/99 2/12/99 2/12/99 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20 ug/L 20 ug/L 20 ug/L 60 fig/L 310 ug/L <br /> LCS Result 18 17 18 58 300 <br /> LCS % Recov 90 85 90 97 97 <br /> 60-140 60-140 60-140 60-140 <br /> --LCS-- - 70-130 70-130 70.130 70=130 50-156- <br /> Control Limits <br /> Please Note <br /> SEQUOIA ANALYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Elap#1271 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 /> Kayv iCr yai <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9902163 BLA <2> <br />