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Sequoia <br /> 680 Chesapeake Drive Itedwocd City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> i.i 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> �� } C 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> )5 LZ LS3 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 /> Blaine Tech Services, Inc h Client Project IDI Shell, 341 E Main St , Ripon ' <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> ,Attention I=ran Thie Work Order# 9902702 -01 Reported Mar 2, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> Benzene <br /> QC Batch#: GCO22299802002A GCO2MSW2002A GCO22299802002A GCO22299802002A GCO22299802002A <br /> Analy. Method: EPA 8020 EPA 6020 EPA 8020 EPA 8020 EPA 8015M <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#. 9021259 9021259 9021259 9021259 9021259 <br /> Sample Cone : N D N D N D N D N D <br /> Prepared Date: 2/22/99 2/22/99 2/22/99 2/22/99 2/22/99 <br /> Analyzed Date 2/22/99 2/22/99 2/22/99 2/22/99 2/22/99 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Cone Spiked 2011g/L 20pg/L 20pg/L 60pg/L 310pg/L <br /> Result- 15 14 15 49 290 <br /> MS%Recovery 75 70 75 82 94 <br /> Dup Result 19 18 19 62 320 <br /> MSD%Recon.: 95 90 95 103 103 <br /> RPD 235 250 235 234 98 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> nr 4 i r } 1 ` v r r .. v v z w •v } ♦v..ryv <br /> LCS# 21-CS0222% 2LC6022299 2LCS022299 2LCS022299 2LCS022299 <br /> Prepared Date 2/22/99 2/22/99 2/22/99 2/22/99 2/22/99 <br /> Analyzed Date 2/22/99 2/22/99 2/22/99 2/22/99 2/22/99 <br /> Instrument I D #: HP2 HP2 HP2 HP2 HP2 <br /> Cone Spiked 20 pg/L 20 pg/L 20 pg/L 60 pg/L 310 pg/L <br /> LCS Result* 18 18 18 59 310 <br /> LCS%Recov 90 90 90 98 100 <br /> D <br /> LCS 70-130 70-130 70-130 70-130 50-150 <br /> Control Limits <br /> rica56 i+i�ic <br /> SEQUOIA ANALYTICAL The LCS is a control sample of known,interferent-fres 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 R <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 /> Ka imyai <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9902702 BLA <1> <br />