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a. *� I- Sequoia 680 Chesapeake Dave 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 /> qwr Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921-0100 <br /> Smith Environmental Client Project 1D 14591, 94-36710/11 <br /> 1260 Graphics Drive Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey Work Order# 96101361-02, 04, 05 Reported Nov 1, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#- GC102496BTEX18A GC102496BTEX18A GC102495BTEX18A GC102496BTEX18A <br /> Analy. Method- EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst R Geckler R Geckler R Geckler R Geckler <br /> MS/MSD # 961OB1603 961OB1603 961081603 961081603 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 10/24/96 10/24/96 10/24/96 10/24/96 <br /> Analyzed Date 10/24/96 10/24/96 10/24/96 10/24/96 <br /> Instrument I D # GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conc Spiked lopg/L 10frg/L 10pg/L 30pg/L <br /> Result 11 10 10 31 <br /> MS % Recovery 110 100 100 103 <br /> Dup Result 11 10 99 31 <br /> MSD % Recov 110 100 99 103 <br /> RPD 00 00 10 00 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK102396 BLK102396 BLK102396 BLK102396 <br /> Prepared Date 10/24/96 10/24/96 10/24/96 10/24/96 <br /> Analyzed Date 10/24/96 10/24/96 10/24/96 10/24/96 <br /> Instrument I D #- GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conc Spiked 1opg/L 10pg/L 10Ng/L 30pg/L <br /> LCS Result 11 10 10 31 <br /> LCS % Recov 110 100 100 103 <br /> MS/MSD 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 LC$is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br />. SEQU?. LYTIC L 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 fail wlthln specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Vyt 5 <br /> Project Manager "MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9616D61 SSS <2> <br />