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r <br /> Sequoia 680 Chesapeake Drive Redwood Gty CA 94063 (650) 364 9600 FAX(650)364 9333 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)986 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 {g16) g21 9600 FAX(916)931 0100 � <br /> Ground Zero Analysis, Inc Client Protect !D 96-163 <br /> 1714 Main Street /Knowles Rock Liquid <br /> Escalon, CA 95320 <br /> Attention Greg Stahl Work Order# 9711038 -01-02 <br /> Reported Nov 7, 1997 <br /> i <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl fE y Xylenes Gas <br /> enzene <br /> QC Sat( <br /> GC110597BTEX21A GC110597BTEX21A GCB1105976TEX21A GC110597BTEX21A <br /> Analy Method' EPA 9020 EPA 8020 EPA 8020 GC110597BTEX21A <br /> Pre Method EPA 5030 EPA 5030 EPA 5030 EPA 8020 EPA 801 <br /> EPA 5030 EPA 5030o <br /> Analyst A Mtraftab A Mtraftab A Mrraftab <br /> MS/MSD# 971101701 971101701 971101701 971101701 971101701 <br /> Mtraftab A Mtraftab <br /> Sample Conc N D 9 <br /> k Prepared Date 11/5/97 N D N D N A <br /> 11/5/97 11/5/97 N D <br /> An&ly2 d Dere 11/5/97 11/5/97 11/5/97 1111/5/97/5/97 11/5/97 <br /> Instrument I D.# GCHP21 GCHP21 GCHP21 1 1/5/97 <br /> CHP21 <br /> Conc spliced. 10ug/L 10GCHP21 GCHP21 <br /> u9/L 10 u9/L 30 Fr9l L 60 u9/L <br /> Result 9 1 89 8 7 <br /> MS %Recovery 91 26 64 <br /> ss 87 87 <br /> 107 <br /> Dup. Result 9 3 90 8 9 <br /> MSD%Recov93 27 52 <br /> 90 89 90 <br /> 87 <br /> RPD 22 11 23 <br /> RPD Limrt0-25 3 8 21 <br /> 0-25 0-25 <br /> 0-25 0-25 <br /> LCS# BLK110597 BLK110597 BLK110597 <br /> $LK110597 BLK110597 <br /> Prepon d pate 11/5/97 11/5/97 11,'5/97 11/5/97AnWyxed 11/5/97 <br /> InstRlrttlerlt I D#. GCHP21 11/5/97 11/5/97 11/5/97 11/5/97 11/5/97 <br /> G <br /> Cork. Spiked 10ug/L GCHP21 GCHP21 GCHP21 GCHP21 <br /> u9/L 10 ug/L 30 u9/L 60 ug/L <br /> LCS Result 88 8 9 <br /> LCS%Recov 88 8 7 26 52 <br /> 89 87 87 <br /> 87 <br /> f" <br /> 60140 60-140 60-140 60140 <br /> LCS 70-130 70-130 6D-140 <br /> Control Limits 7D-130 70-130 70 130 <br /> [erf' <br /> Note <br /> S A LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, I <br /> LYTICAL ation,and analytical me#hods employed for the samples The matrix spike rsan ahquat of sample <br /> d with known quantities of specific compounds and subjected to the entire analytical procedure 8 <br /> overy of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> P ence,the I_CS recovery rs to be used to validate the batch <br /> gy ner <br /> Pro anager **MS=Matrix Spike, MSD=MS Duplicate RPD=Relative%Difference <br /> p 9711038 GGG <1> <br /> E <br />