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05/08/1996 15:37 5104209170 CAMBRIA PAGE 16 <br /> fir' <br /> 4D Sequoia v68o Chesapeake Drive Redwood Gey,cA 94061 (415) 364.96m FAX(415)364.9213 <br /> 404 N Wiaet Lane Walnut Geek,CA 94598 (510) 988.9600 FAX(510)98a-9673 <br /> Analytical 819 St^ktr Avenue,State 8 Samrnento,CA 95814 (916) 921.9600 FAX(916)921.0too <br /> Cambria EnAronmental Client Prolect(D: -Sheil,341 E. Main, Ri on <br /> 1144 85th Street Ste C Matrix: Solid P <br /> Oakland,CA 946oe <br /> Atte ntion: Scott MacLeod QC Sample Group 6041807-822 Reported: Apr 29, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte;-- 8en2ene Toluene Ethyl Xylenes <br /> Benzene <br /> QC(patch*: GCO42696 GC042e96 GCO42696 GCo42696 <br /> BTEXEXB BTEXEXB BTEXEXB BTEXEXB <br /> Analy.Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep.Method: EPA 5030 EPA 5030 EPA 50.30 EPA 5030 <br /> Analyst: E.Cunanan E.Cunanan E Cunanan E.Cunanan <br /> US/MSD#: 96CME46-01 9604E46-01 96D4E46-01 9604E46-01 <br /> Sample Conc.: N D. N.D. N.D. N.D. <br /> Prepared Date. 4/26/96 4/25/96 4/26/95 4/28/96 <br /> Analyzed Date: 4/26/96 4/26/96 4/26/96 4/26/96 <br /> Instrument l.D.#: GCHP-01 GCHP•01 GCHP-01 GCHP-01 <br /> Cone-Spiked: 0.20 mg/kg 0.20 mg/kg 0.20 m0/kg 0 50 m9/kg <br /> Result: 0.19 0.19 0.19 0.58 <br /> MS a)6 Recovery: 90 95 95 97 <br /> Dup.Result: 019 0.19 0.20 0.58 <br /> MSD%Recov.: 95 95 100 97 <br /> RPD: 54 0.0 5.1 0.0 <br /> RPD Lirrtlt: 0-50 0-50 0-50 0-50 <br /> LCS : BLK042696 BLK042696 BLK042696 BLK042896 <br /> Prepared Date: 4/26/95 4/26/95 4/26/96 4/26/86 <br /> Analyzed Date: 4/25/95 4/26/96 4/26/96 4/26/96 <br /> Instrument I.D.#: GCHP-01 GCHP-01 GCHP-01 GCHP-01 <br /> Conc.Spiked: 0.20 mg/kg 020 mg/kg 0.20 mg/kg 0.60 mg/kg <br /> LCS Result: 0.21 0.21 0.21 062 <br /> LCS%Recov.: 105 105 105 103 <br /> LCS 50-150 50150 50-150 50.150 <br /> Control Umits <br /> PleaseNote: <br /> The LCS Is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 1 NALYTICAL, #1210 preparation,and analytical methods employed for the samples. The matrix spike Is an allquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure, it <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> �—" interference,the LCS recovm is to be used to validate the batch. <br /> Keimer =Matrix Spike, Duplicate,RPD-Rslat;ve%Difference <br /> Prol ct Manager <br /> 604 t807.CAM <9> <br />