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Q Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364-9600 FAX(650)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 /> h <br /> Blaine Tech Services, Inc Cherrt Project ID 'Shell Stockton j 971202-1-1 <br /> " 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> `,Attention Fran Thie Work Order# 9712358 -01, 04, 06, Reported Dec 31, 1997 . <br /> 9712360-15 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#' GC121597STEX21A GC121597BTEX21A G01215973TEX21A GC121597BTEX21A GC121597STEX21A <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. A.Miraftab A. Miraftab A MLraftab A. Miraftab A.Miraftab <br /> MS/MSD#. 971266301 971266301 971266301 971266301 971266301 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date- 12/15/97 12/15/97 12/15/97 12/15/97 12/15/97 <br /> Analyzed Date 12/15/97 12/15/97 12/15/97 12/15/97 12/15/97 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10,ug/L 10ug/L 10Ng/L 30ug/L 60lig/L <br /> Result 9 6 9 8 10 29 57 <br /> MS % Recovery 96 98 100 97 95 <br /> Dup Result 8 8 91 9 9 27 54 <br /> MSD % Recov 88 91 99 90 90 <br /> RPD 87 74 10 71 54 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS #. BLK121597 BLK121597 BLK121597 BLK121597 BLK121597 <br /> Prepared Date 12/15/97 12/15/97 12/15/97 12/15/97 12/15/97 <br /> Analyzed Date 12/15/97 12/15/97 12/15/97 12/15/97 12/15/97 <br /> Instrument I D #. GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked: 10pg/L 10ug/L 10,ug/L 30Ng/L 60pg/L <br /> LCS Result 97 10 10 3o 57 <br /> LCS % Recov 97 100 100 100 95 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 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 /> 4'WA 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 /> er **MS=Matrix Spike, MSD=MS Duplicate, RPR=Relative%Difference 9712358 BLA <1> <br /> C <br />