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. 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client 981118-K2 Project ID Chevron 9-1848 <br /> 1 / <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Christine Lillie Work Order# 9811 D37 -01-04 Reported Dec 8, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> Benzene <br /> CSC Batch# GC112398802002A GC112398802002A GC112398802002A GC112398802002A GC112398802002A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 JEPA 5030 EPA 5030 <br /> Analyst C Westwater C Westwater C Westwater C Westwater C Westwater <br /> MS/MSD # 8111540 8111540 8111540 8111540 8111540 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 11/23/98 11/23/98 11/23/98 11/23/98 11/23/98 <br /> Analyzed Date 11/23/98 11/23/98 11/23/98 11/23/98 11/23/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20 ug/L 20 ug/L 20 ug/L 60 ug/L 430 ug/L <br /> Result 21 20 21 68 420 <br /> MS % Recovery 105 100 105 113 98 <br /> Dup Result 19 18 19 62 390 <br /> MSD % Recov 95 90 95 103 91 <br /> RPD 10 105 10 92 74 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS # LCS112398 LCS112398 LCS112398 LCS112398 LCS112398 <br /> Prepared Date 11/23/98 11/23/98 11/23/98 11/23/98 11/23/98 <br /> Analyzed Date 11/23/98 11/23/98 11/23/98 11/23/98 11/23/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20 ug/L 20 ug/L 20 ug/L 60ug/L 430 ug/L <br /> LCS Result 20 19 19 66 400 <br /> LCS % Recov 100 95 95 110 93 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 60-140 <br /> Control Limits <br /> Please Note <br /> SE000IA ANALYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Elap#1211 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-ccntroi limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> I gory <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9811037 BLA <1> <br />