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YL t• <br /> a� * Sequoia 680 Chesapeake Dnve Redwood Cim 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 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Smith Environmental Client Project ID 94-331 01-07 <br /> 1260 Graphics Drive Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey Work Order# 9612567-05 Reported Dec 26, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#' GC121396BTEXOIA GC121396BTEXOIA GC121396BTEX01A GC121396BTEX01A <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 #- 961234501 961234501 961234501 961234501 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 12/13/96 12/13/96 12/13/96 12/13/96 <br /> Analyzed Date 12/13/96 12/13/96 12/13/96 12/13/96 <br /> Instrument I D # GCHP1 GCHP1 GCHP1 GCHP1 <br /> Conc Spiked 10pg/L 10pg/L 10pg/L 30pg/L <br /> Result 10 10 10 32 <br />• MS % Recovery 100 100 100 107 <br /> Dup Result 92 92 94 30 <br /> MSD % Recov .. 92 92 94 100 <br /> RPD 83 83 62 65 <br /> RPD Limit 025 0-25 025 0-25 <br /> LCS # BLK121396 BLK121396 BLK121396 BLK121396 <br /> Prepared Date. 12/13/96 12/13/96 12/13/96 12/13/96 <br /> Analyzed Date. 12/13/96 12/13/96 12/13/96 12/13/96 <br /> Instrument l D # GCHP1 GCHP1 GCHP1 GCHPI <br /> Conc Spiked 10pg/L 10pg/L 10pg/L 30pg/L <br /> LCS Result 99 99 98 30 <br /> LCS % Recov - 99 99 98 100 <br /> M /M ❑ 60-140 60140 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 /> / 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 /> 0 rference,the LCS recovery is to be used to validate the batch <br /> Vytas Ankaltis <br /> Project Manager "*MS=Matrix Spike MSD=MS Duplicate, RPD=Relative%Difference 9612567 SSS <2> <br />