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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> Analytical 8 t 9 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton / 961025-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 96101-137-03-07, 09-10, 12 Reported Nov 14, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCIO2996BTEX18A GC102996BTEX18A G0102996BTEX18A GC102996BTEX18A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst R Geckler R Geckler R Geckler R Geckler <br /> MS/MSD # 961OB9104 961OB9104 961089104 96JOB9104 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Analyzed Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Instrument I D # GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conc Spiked 10pg/L 10Ng/L 10ug/L 30Ng/L <br /> Result 75 83 95 30 <br /> • MS % Recovery 75 88 95 100 <br /> Dup Result 78 92 99 31 <br /> MSD % Recov 78 92 99 103 <br /> RPD 39 44 41 33 <br /> RPD Limit 0-25 025 025 0-25 <br /> LCS # BLK102996 BLK102996 BLK102996 BLK102996 <br /> Prepared Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Analyzed Date 10/29/96 10/29/96 10/29/96 10/29/96 <br /> Instrument l D # GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conc Spiked 10 pg/L 10 erg/L 10 ug/L 30,ug/L <br /> LCS Result 80 94 10 32 <br /> LCS % Recov 80 94 100 107 <br /> MS/MSD 60-140 60140 60140 60140 <br /> LCS 70130 70130 70-130 70130 <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 /> EQ OIA ANALYTICAL 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 /> { j 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 /> Peggy Pen <br /> Pr,olect Manager MS=Matrix Spike MSD=MS Duplicate, RPD=Relative% Difference 961OH37 BLA <2: <br />