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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(97 5)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9Z1-9600 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 Project ID Shell 6131 Pacific Ave <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order # 9811 H55-04-08 Reported Dec 14, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> _Benzene..----_ <br /> QC Batch# GC120498802002A GC120498802002A GC120498802002A GC120498802002-A GC120498802002A <br /> Anally 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 D Newcomb D Newcomb D Newcomb D Newcomb D Newcomb <br /> MS/MSD # 8120036 8120036 8120036 8120036 8120036 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 12/4/98 12/4/98 12/4/98 12/4/98 12/4/98 <br /> Analyzed Date 12/4/98 12/4/98 12/4/98 12/4/98 12/4/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20ug/L 20ug/L 20pg/L 60,ug/L 310ug/L <br /> Result 20 19 20 64 400 <br /> MS % Recovery 100 _ 95 100 107 129 - <br /> Dup Result 19 19 20 63 380 <br /> MSD % Recov 95 95 100 105 123 <br /> RPD 51 00 00 16 51 <br /> RPD-Limit- o-2o 0-20 0-20 0-20 0-50_ <br /> _ LCS # =_LCS120498 __=LCS120498 __LCS120498_ = = = LCS 120498= _ _ _ _LCS120498 <br /> Prepared Date 12/4/98 12/4/98 12/4/98 12/4/98 12/4/98 <br /> Analyzed Date 12/4/98 12/4/98 12/4/98 12/4/98 12/4/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conic Spiked 20,ug/1- 20lig/L 20pg/L 60Ng/L 310ug/L <br /> LCS Result 20 19 20 64 380 <br /> LCS % Recov 100 95 100 107 123 <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 /> S7p # <br /> OIA A AL ]CAL The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> 127 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 I <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 /> neer <br /> P61e Manager **MS=Matrix Spike, MSD=MS Duplicate, APO=Relative%Difference 9811H55 BLA <2n <br />