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Sequoia 680 Chesapeake Dnve Redwwd Cim GA 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 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 'Blaine Tech Services, Inc Client Project ID Shell Stockton /970822-J4 <br /> 4 1880 Rogers Ave Matrix Liquid V <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9708D38-05 Reported Sep 8, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC BatCh#: GC082897STEX03A GC082897BTEX03A GC082897BTEX03A GC082897STEX03A GCO82897BTEX03A <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.Miraftab X Mirattab A.Miraftab <br /> MS/MSD #: 9708C7104 9708C7104 970807104 9708C7104 970807104 <br /> Sample Conc - N D N D N D N D N D <br /> Prepared Date. 8/28/97 8/28/97 8/28/97 8/28/97 8/28/97 <br /> Analyzed Date- 8/28/97 8/28/97 8/28/97 8/28/97 8/28/97 <br /> Instrument LD # GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked: 10 Ng/L 10 Ng/L 10 ug/L 30 ug/L 60 Ng/L <br /> Result 10 10 10 28 73 <br /> MS % Recovery- 100 100 100 93 122 <br /> 0 Dup Result. 10 10 10 28 73 <br /> MSD %Recov.• 100 100 100 93 122 <br /> RPD* 04 00 00 00 00 <br /> RPD Limit- 0-25 0-25 0-25 0-25 0-25 <br /> LCS #' BLK082897 BLK082897 BLK082897 BLK082897 BLK082897 <br /> Prepared Date 8/28/97 8/28/97 8/28/97 8/28/97 8/28/97 <br /> Analyzed Date 8/28/97 8/28/97 8/28/97 8/2B/97 8/28/97 <br /> Instrument LD #. GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10Ng/L 10ug/L 10ug/L 30ug/L 60Ng/L <br /> LCS Result 10 10 10 28 72 <br /> LCS %Recov.: 100 100 100 93 120 <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 /> BQ O A N LYTICAL 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 /> Pe y en e <br /> Project Manager "*MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9708D38 SEA <5> <br />