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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 (510)988-9600 FAX(510)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(�07)%Z t342'� <br /> Blaine Tech Services, Inc Client Project ID Shell 6131 Pacific Ave <br /> 1680 Rogers Ave Matrix <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9805F44-03, 06 Reported Jun 11, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> -QC_Batch#_ GC060598802004A GC060598802004A__GCG60598802_004A GCO60598802004A GCO60598802004A <br /> Analy Method EPA 8020 EPA solo EPA$020 _ EPA 8020 --- ---EPA 8015M--- -- <br /> Prep Method. EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst K Nill K Nill K Nill K Nill K Ndl <br /> MS/MSD # 8052010 8052010 8052010 8052010 8052010 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date. 6/5/98 6/5/98 6/5/9$ 6/5/98 6/5/98 <br /> Analyzed Date 6/5/98 6/5/98 5/5/98 6/5/98 6/5/96 <br /> Instrument LD # HP4 HP4 HP4 HP4 HP4 <br /> Conc Spiked 20ug/L 20ug/L 20jig/L 60ug/L 320yg/L <br /> Result. 19 20 19 60 - 290 <br /> MS % Recovery 95 100 95 100 91 <br /> Dup Result 19 20 19 60 290 <br /> MSD % Recov 95 100 95 100 91 <br /> RPD 00 00 00 00 00 <br /> RPD Limit 0-25 0-20 0-20 0-20 0-50 <br /> _LCS #� LCS060598 LCS060598 LCS060598 T —LCS060598� T LCS060598 <br /> Prepared Dater --6/5/98 6/5/98 6/5/9$_ --- -_ F 6/5%98 - -- - - - 6/5/98 <br /> Analyzed Date 6/5/98 6/5/98 6/5/98 6/5/98 6/5/98 <br /> Instrument I D # HP4 HP4 HP4 HP4 HP4 <br /> Conc. Spiked 20Ng/L 20ug/L 20ug/L 60Ng/L 320ug/L <br /> LCS Result 17 18 18 57 270 <br /> LCS % Recov 85 90 90 95 84 <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 /> eeenner <br /> LYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 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 <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 /> gar **Mq=Matriv Sputa MSD=MS Duplicate RPD=.Relative%Difference 9805F44 BLA <5s <br />