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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> (T� 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> r <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8632/960507-W5 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9605581 -01-04 Reported May 20, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> OC Batch#. GCO51396BTEX20A GC051396BTEX20A GC0513%BTEX20A GCO51396BTEXMA GCO514960HBPEXZ <br /> Analy Method. EPA 8020 EPA 8020 EPA 5020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 3520 <br /> Analyst J Woo J Woo J Woo J Woo J Minkel <br /> MS/MSD# 960517907 960517907 960517907 960517907 960561504 <br /> Sample Conc ' ND ND N D N D 2,000 <br /> Prepared Date' 5/13/96 5/13/96 5/13/96 5/13/96 5/14/96 <br /> Analyzed Date 5/13/96 5/13/96 5/13/96 5/13/96 5/15/96 <br /> Instrument I.D.#: GCHP20 GCHP20 GCHP20 GCHP20 GCHP5 <br /> Conc Spiked: 10 jug/L 10 pg/L 10 ug/L 30.tg/L 1000 frg/L <br /> Result: 10 10 10 30 2800 <br />• MS %Recovery- 100 100 100 100 so <br /> Dup. Result. 11 11 11 33 2800 <br /> MSD% Recov 110 110 110 110 80 <br /> RPD. 95 95 95 95 00 <br /> RPD Limit 0-25 0-25 0-25 0-25 0150 <br /> n <br /> LCS#: BLK051396 BLK0513% BLK051396 BLK051396 BLK051496 <br /> Prepared Date: 5/13/96 5/13/96 5/13/96 5/13/96 5/14/96 <br /> Analyzed Date: 5/13/96 5/13/96 5/13/96 5/13/96 5/15/96 <br /> Instrument LD #: GCHP20 GCHP20 GCHP20 GCHP20 GCHP5 <br /> Conc. Spiked: long/L 10ug/L long/L 30ug/L 1000pg/L <br /> LCS Result. 10 10 10 30 970 <br /> LCS% Recov.: 100 100 100 100 97 <br /> 613-140 60-140 60-140 60-140 50-150 <br /> LCS 70-130 70-130 70-130 70-130 60-140 <br /> Control Limits <br /> Please Nate <br />. The LCS Is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> O ANALYTICAL 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 /> 9 <br /> ject Manager '*MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9605581 BILA <3n <br />