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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94.598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suites Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> n <br /> GroundZeroAnalysls, Inc Client Project ID 97-163 <br /> 1714 Main Street Matrix Liquid <br /> Escalon, CA 95320 <br /> Attention Greg Stahl Work Order# 9712970 -01, 02 Reported Dec 22, 1997 <br /> P � <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#' GC121897BTEX02A GC1218978TEX02A GC121897BTEX02A GC121897BTEX02A GC121897sTEX02A <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 A Mlraftab <br /> y A Miraftab A Miraftab A.Miraftab A Miraftab <br /> MS/MSD# 9712Amm 971M702 9712AO702 9712AO702 <br /> Sample Conc N D N D N D 9712A0702 <br /> ND ND <br /> Prgmn d Date 12/18/97 12/18/97 12/18/97 12/18/97 12/18/97 <br /> 099' 12/18/97 12/18/97 12/18/97 12/18/97 12/18/97 <br /> Iniftment I.D.#. GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked' 10yg/L 10yg/L 10,rg/L 30,ug/L 60 <br /> p9/L <br /> 7 <br /> Result- 8 7 86 88 27 <br /> MS %Recovery g7 86 62 <br /> 88 90 103 <br /> Dup.Result 80 79 81 25 <br /> MSD%Recov' ao 57 <br /> 79 81 83 95 <br /> RPI] 84 85 83 77 <br /> RPD Limit 84 <br /> 0 25 0-25 0-25 0 25 <br /> 0-25 <br /> r <br /> LCS# BLK121897 BLK121897 BLK121897 BLK121897 BLK121897 <br /> Premed Date- 12/18/97 12/18/97 12,118/97 12/18/97 12/18/97 <br /> AMWW 00e: 12/18/97 12/18/97 12,18/97 12/18/97 12/18/97 <br /> InSibu nent I.D.# GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc.Spiked. 10 GCHP2 <br /> F►9/L 10 k9/L 10 k9/L 30 N9/L 60 k9/L <br /> I <br /> LCS Result 83 82 84 26 <br /> LCS%Recov 8360 <br /> 82 84 67 100 <br /> 60-140 60.140 60-140 60-140 6D-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <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 /> A 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 p It <br /> t 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 /> Peg y ginner <br /> Project Manager *MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> 9712970 GGG <1 n <br /> I <br /> 1 <br />