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4 [� <br /> F <br /> Sequoia 690 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (9Z5)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(9 16)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> • t <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-4275 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Christine Lillie Work Order # 9812C63 -01-03, 05-11 Reported Jan 6, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl _Xylenes T BTEX as TP_H <br /> T n Benzene <br /> QC Batch# GC123098802004A GC123098802004A GC123098802004A GC123098802004A GC123098802004A <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 C Westwater C Westwater C Westwater C Westwater C Westwater <br /> MS/MSD # 8121910 8121910 8121910 8121910 8121910 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 12/30/98 12/30/98 12/30/98 12/30/98 12/30/98 <br /> Analyzed Date 12/30/98 12/30/98 12/30/98 12/30/98 12/30/98 <br /> Instrument I D # HP4 HP4 HP4 HP4 HP4 <br /> Conc Spiked 20 ug/L 20 ug/L 20 ug/L 60 jig/L 330 ug/L <br /> Result 22 19 19 65 360 <br /> MS % Recovery 110 95 95 108 109 <br /> Dup Result 21 18 19 65 360 <br /> MSD % Recov 105 90 95 108 109 <br /> RPD 47 54 00 00 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS # LCS123098 LCS123098 LCS123098 LCS123098 LCS123098 <br /> Prepared Date 12/30/98 12/30/98 12/30/98 12/30/98 12/30/98 <br /> Analyzed Date 12/30/98 12/30/98 12/30/98 12/30/98 12/30/98 <br /> Instrument I D # HP4 HP4 HP4 HP4 HP4 <br /> Conc Spiked 20 ug/L 20 ug/L 20 ug/L 60 ug/L 330 ug/L <br /> LCS Result 21 18 19 66 350 <br /> LCS % Recov 105 90 95 - 110 106 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 50-150 <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 /> f18Eiap# 71 preparation,and analytical methods employed for the samples The matrix spike Is an aliquot of sample <br /> l 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 fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> regory <br /> oject Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9812C63 BLA <1> <br />