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Sey� � 680 eaDrive Redwood City CA 9406(650)364-9600 FAX(550)364-9233 <br /> CA 404 N W1get Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> '819 Striker'Avenue Suite 8 Sacramento CA 95834 ,i (916)921-9600 FAX(916)921-0100 <br /> Anal icdl 1455 McDowell Blvd North Ste D Petaluma,CA 94954 r (707)792-1865 i 'FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell 341 E Main St <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 � <br /> Attention Fran Thie Work Order# 9804174-01 Reported May i8, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte MTBE <br /> k <br /> QC Batch# MS0502988260S2A <br /> Analy Method EPA 8260 <br /> Prep Method- EPA 5030 <br /> Analyst N Nelson <br /> MS/MSD# 8041932 <br /> Sample Cone N D <br /> Prepared Date 5/2/98 T <br /> Analyzed Date - 5/2/98 <br /> Instrument I D # GCMS2 <br /> Cone Spiked 50 ug/L - <br /> Result 49 <br /> MS % Recovery 98 - Y -- <br /> Dup Result 52 - <br /> MSD %Recov 104 <br /> RPD 59 <br /> RPD-Limit -0-25 _ <br /> LCS #I LCS050298 r <br /> Prepared Date 5/2/98 <br /> Analyzed Date 5/2/98 <br /> Instrument I D # GCMS2 <br /> Conc, Spiked 50ug/L <br /> LCS Result 49 <br /> LCS %-Recov 98- <br /> 60-140 <br /> LCS 70-130 <br /> Control Limits <br /> Please Note <br /> ISEA NALYTICAL The LGS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 1 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of samplefortified 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 /> ner <br /> nager **MS=Matrix Spike,"MSD=MS Duplicate,RPD=Relative 9'o Difference 9804174 BLA <2> <br />