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Sequoia 680 Chesapeake Dnve Redwood Cam CA 94063 (650) 364 %00 FAX(650)364-9233 <br /> 4D 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> 4 Analytiea1 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX (916) 921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /971224-D1 <br /> r 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9712F98 -01-02, 04 <br /> Reported Jan 14, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte- Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch#: GCO10798BTEX02A GCO10798BTEX02A GC010798BTEX02A GCO10798BTEX02A GCO10798BTEX02A <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 A.Miraftab A.Miraftab <br /> MS/MSD#. 980100902 980100902 980100902 980100902 980100902 <br /> Sample Cone : N D N D N D N D N D <br /> Prepared Date 1/7/98 1/7/98 1/7/98 1/7/98 1/7/98 <br /> Analyzed Date 1/7/98 1/7/98 1/7/98 1/7/913 1/7/98 <br /> Instrument I D #: GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Cone Spiked: 10µg/L 10ug/L 10ug/L 30µg/L 60µg/L <br /> Result. 94 89 90 27 60 <br /> MS % Recovery- 94 89 90 90 100 <br /> 10 Dup. Result: 85 8 0 80 24 53 <br /> MSD % Recov : 85 so 80 so 88 <br /> RPD: 10 11 12 12 12 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS BLK010798 BLK010798 BLK010798 BLK010798 BLK010798 <br /> Prepared Date: 1/7/98 1/7/98 1/7/98 1/7/98 1/7/98 <br /> Analyzed Date: 1/7/98 1/7/98 1/7/98 1/7/98 1/7/98 <br /> Instrument I D.# GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Cone. Spiked. 10µg/L 10µg/L 10µg/L 30µg/L 60µg/L <br /> LCS Result- 9 5 90 91 28 59 <br /> LCS % Recov. 95 90 91 93 98 <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 /> OEU I NALYTICAL 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 /> PennPManager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9712F98 BLA <1> <br />