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r ■ \ Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiger Lane Walnut Creek, CA 94598 (510) 968-9600 FAX(5 10) 988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX (916)921-0100 <br /> .. ...: <br /> Smith Environmental Client Project ID 14505, 94-36901-10 <br /> ::1260 Graphics Drive Matrix: Liquid <br /> Modesto, CA 95351-1502 <br /> ::;:Attention: Jeanne Hornsey Work Order#: 9701 D82-04 Reported: Feb 6, 1997::::: <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> CC Batch#: GCO12997BTEX18A GCO12997BTEX18A GCO12997STEX18A GCO129978TEX18A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: A.Porter A. Porter A. Porter A. Porter <br /> MS/MSD#: 970184105 970IB4105 970184105 970184105 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 1/29/97 1/29/97 1/29/97 1/29/97 <br /> Analyzed Date: 1/29/97 1/29/97 1/29/97 1/29/97 <br /> Instrument I.D.#: GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conc. Spiked: 10 pg/L 10 fug/L 10 fug/L 30 fug/L <br /> Result: 13 9.8 9.4 29 <br /> MS % Recovery: 130 98 94 97 <br /> Dup. Result: 12 10 10 31 <br /> MSD % Recov.: 120 100 100 103 <br /> RPD: 8.0 2.0 6.2 6.7 <br /> RPD Limit: 0-25 0.25 0-25 0-25 <br /> LCS #: BLK012997 BLK012997 BLK012997 BLK012997 <br /> Prepared Date: 1/29/97 1/29/97 1/29/97 1/29/97 <br /> Analyzed Date: 1/29/97 1/29/97 1/29/97 1/29/97 <br /> Instrument I.D.#: GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conc. Spiked: 10 fug/L 10 fig/L 10 fug/L 30 Mg/L <br /> LCS Result: 10 10 10 30 <br /> LCS % Recov.: 100 100 100 100 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 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 /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> r-, 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 /> C� interference,the LCS recovery is to be used to validate the batch. <br /> Sheila Flynn <br /> Project Manage **MS=Matrix Spike, MSD=MS Duplicate,APO=Relative%Difference 9701D82.SSS <2> <br />