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Sequoia 630 Chesapeake Drive Rcdwood City,CA 9.4063 (415) 364-9600 FAX(4t5) 364.9233 <br /> + ` 404 11,1-Wig,,Lane Walnut Creek,CA 94598 (510) 988.9600 FAX(5 t0)988-9671 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95934 (916) 921-96W FAX(9 t6)921.0100 <br /> Pacific Environmental Group Client Project ID. 930-035.21 /2093, Tracy <br /> >=2025 Gateway Place, Suite 440 Matrix: LIQUID <br /> "'San Jose, CA 95110 <br /> Attention: Greg Barclay Work Order# 9604F19 01-06 Reported: May 8, 1996 <br /> .,...<:. .... <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> CC Batch#: GC042696BTEX17A GCG426968TEX17A GC042%6BTEX17A GCO42696BTEX17A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8024 <br /> Prep. Method: EPA 50W EPA 50.30 EPA 5030 EPA 50.30 <br /> Analyst: J.Woo J.Woo J.Woo J.Woo <br /> MS/MSD#: 960492302 960492302 960492302 960492302 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 4/26/96 4/26/96 4/26/96 4/26/96 <br /> Analyzed Date: 4/26/96 4/26/96 4/26/96 4/26/96 <br /> Instrument I.D.#: GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc.Spiked: 10pg/L 10pg/L 10ug/L 30Ng/L <br /> Result: 11 10 10 31 <br /> MS %Recovery: 110 100 100 103 <br /> �4.e Dup. Result: 10 9.8 10 30 <br /> MSD%Recov.: 100 98 100 100 <br /> RPD: 9.5 2.0 0.0 3.3 <br /> RPD Limit: 0-25 0.25 0.25 0.25 <br /> C.:.... ....n:..t?5....::.h..E.?f..r:::r.:.•::..:::::::u....t...,.:..::.:....v....n:............:v::r....:.::::.�:.v:::nv-:w:::::v,r;.;............... <br /> -v:n:;r::.v::moi...i:}}}:�i:{iii•;.}:.:v} '.v.�':::'- i;:::a'•:.}:i:i}}:.}:vi:::::.....:v... <br /> } <br /> LCS#: OLK042696 BLKG42696 BLK042696 BLK0426% <br /> Prepared Date: 4/26/96 4/26/96 4/26/96 4/26/96 <br /> Analyzed Date: 4/266/96 4/26/96 4/26/96 4/26/96 <br /> Instrument I.D.#: GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc. Spiked: lopg/L 10ug/L 10ug/L 30,rg/L <br /> LCS Result: 10 10 10 31 <br /> LCS %Recov.: 100 100 100 103 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70.130 70.130 70-130 70-130 <br /> Control Limits ---- <br /> Quality Assurance Statement: All standard operating procedures and quality control requirements have been met. <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 /> interference,the LCS recovery is to be used to validate the batch. <br /> Claudia Hirotsu <br /> Project Manager MS=Matrix Spike.MSD=MS Duplicate,RPD=Relative%Difference 9604F19.PPP <1> <br /> : L <br />