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Sequoia 680 Chesapeake Drive 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 /> Analytical 819 Stinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921-0100 <br /> Smith Environmental Client Project ID 95-141 Ekholm Property <br /> 1260 Graphics Drive Matrix Liquid <br /> Modesto CA 95351-1502 <br /> Attention Jeanne Homsey Work Order # 9511E54 -01-2 Reported Nov 30, 1995 <br /> QUALITY CONTROL DATA REPORT <br />' Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br />' QC Batch#. GC1121958TEX17A GC112195STEX17A GC112195BTEX17A GC112195BTEC17A <br /> Analy Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method. EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br />' Analyst J woo J woo J woo J woo <br /> MS/MSD # 951 IA1302 9511A1302 951 tA1302 9511A1302 <br /> Sample Conc - N D N D N D N D <br /> Prepared Date 11/21/95 11/21/95 11/21/95 11/21/95 <br /> Analyzed Date. 11/21/95 11/21/95 11/21/95 11/21/95 <br /> Instrument LD #: GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked loos/L 10ug/L 10j1g/L 30jig/L <br />' Result: 11 11 11 32 <br /> MS % Recovery: 110 110 110 107 <br /> 19Dup Result: 11 10 10 30 <br /> MSD % Recov : 110 100 100 100 <br /> 1 RPD. 00 95 95 65 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br />' LCS #: BLK112195 BLK112195 BLK112195 BLK112195 <br />' Prepared Date 11/21/95 11/21/95 11/21/95 11/21/95 <br /> Analyzed Date 11/21/95 11/21/95 11/21/95 11/21/95 <br /> Instrument I D.#: GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked: 10ug/L 10vg/L 10u9/L 30!19/L <br />' LCS Result 99 99 99 30 <br /> LCS % Recov 99 99 99 100 <br /> MS/MSD <br /> LCS 71-133 72-128 72-130 71-120 <br />' Control Limits <br /> Please Note <br /> The LCS 1s a control sample of known interferent-free matrix that is analyzed using the same reagents <br /> EQIJOIA 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 tall within specified control limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark <br /> Project Manager "MS=Matrix Spike MSD=MS Duplicate RPD=Relative%Difference 9511 E54 SSS <1> <br /> 1 <br />