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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 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> TEL Client Project 1D #W5-11-0406 <br /> 4080 Pike Lane, Ste C Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Justin Ward QC Sample Group 5111924-926 Reported Nov 30, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC 112795 GC112795 GC112795 GC112795 <br /> 802009A 802009A 802009A 802009A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst K Nill K Nitl K Nill K Nill <br /> MS/MSD # 5111171 5111171 5111171 5111171 <br /> Sample Conc N D ND ND ND <br /> Prepared Date 11/27/95 11/27/95 11/27/95 11/27/95 <br /> Analyzed Date 11/27/95 11/27/95 11/27/95 11/27/95 <br /> Instrument I D # HP-9 HP-9 HP-9 HP-9 <br /> Conc Spiked 20,ug/L 20 Ng/L 20 ug/L 60 pg/L <br /> Result 21 22 23 75 <br /> MS % Recovery 105 110 115 125 <br /> ODup Result 21 22 22 75 <br /> MSD % Recov 105 110 110 125 <br /> RPD 00 00 44 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS # 4LCS112795 4LCS112795 4LCS112795 4LCS112795 <br /> Prepared Date 11/27/95 11/27/95 11/27/95 11/27/95 <br /> Analyzed Date 11/27/95 11/27/95 11/27/95 11/27/95 <br /> Instrument I D # HP-9 HP-9 HP-9 HP-9 <br /> Conc Spiked 20pg/L 20(.tg/L 20pg/L 60Ng/L <br /> LCS Result 17 18 18 61 <br /> LCS % Recov 84 89 90 102 <br /> LCS 71-133 72-128 72-130 71-120 <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 /> JProlK <br /> IA NALYTICAL, #1271 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 subfected 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 /> interference,the LCS recoveryis to be used to validate the batch <br /> imer r **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> ct Manager <br /> 5111924 GTL <27- <br />