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Sequoia 680 Chesapeake Dnve Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> woAnalytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 40 <br /> Tech Services, Inc Client Project ID Snell Stockton /970708-F1 r <br /> ,Blaine1680 Rogers Avenue Matrix liquid ' <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9707594-02-03, 05, 07 Reported Jul 28, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> CC Batch#. GCO71797BTEX03A GC071797BTEX03A GC071797BTEX03A GC071797BTEX03A GC071797BTEX03A <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. D Jirsa D Jirsa D Jirsa D Jima D Jirsa <br /> MS/MSD #. 970759212 970759212 970759212 970759212 970759212 <br /> Sample Cone ' N D N D N D N D N D <br /> Prepared Date 7/17/97 7/17/97 7/17/97 7/17/97 7/17/97 <br /> Analyzed Date: 7/17/97 7/17/97 7/17/97 7/17/97 7/17/97 <br /> Instrument I D # GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Cone. Spiked- 10Ng/L 1opg/L 10Ng/L 30Ng/L 60j.1g/L <br /> Result 91 90 90 25 44 <br /> % Recovery: 91 90 90 83 73 <br /> Dup. Result 89 88 87 24 42 <br /> MSD % Recov 89 88 87 80 70 <br /> RPD: 22 22 34 41 47 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS #: BLK071797 BLK071797 BLK071797 BLK071797 BL-KO71797 <br /> Prepared Date- 7/17/97 7/17/97 7/17/97 7/17/97 7/17/97 <br /> Analyzed Date: 7/17/97 7/17/97 7/17/97 7/17/97 7/17/97 <br /> Instrument I D.#: GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Cone Spiked- 10pg/L 10ug/L 10ug/L 30pg/L 60yg/L <br /> LCS Result. 91 90 8 9 25 43 <br /> LCS % Recov- 91 90 89 83 72 <br /> 60-140 6x140 60-14a 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 /> OI 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 K <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 /> e genner <br /> Prod ct Manager *"MS=Matrix Spike, MSR=MS Duplicate,RPD=Relative% Difference 9707594 BLA <2> <br />