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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 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Iwo <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /961025-H2 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order # 961OH38-06 Reported Nov 8, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GC102996BTF-XISA GC102996BTEX18A GC102996BTEX18A 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 # 961089104 961089104 961089104 961089104 <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 10 p9/L 10 u9/L 10 ug/L 30 pg/L <br /> Result 75 88 9 5 30 <br /> MS % Recovery 75 88 95 100 <br /> Dup Result 78 92 go 31 <br /> MSD % Recov 78 92 99 103 <br /> RPD 39 44 41 33 <br /> RPD Limit 0-25 0-25 0-25 025 <br /> LCS # BLK102996 BLK102995 BLK102996 GLK102996 <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 tONg/L 10yg/L 10Ng/L 30,ug/L <br /> LCS Result 80 94 10 32 <br /> LCS % Recov 80 94 100 107 <br /> MS7MSD 60-140 60-140 60-140 60140 <br /> LCS 70-130 70-130 70-130 70-130 <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 /> S OU IA ALYTICAL 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 /> Pgyt�fVfa **MS=Matrix Spike, MSD=MS Duplicate RPD=Relative%Difference 96101138 BLA �5> <br /> Project nager <br />