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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)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) 921.9640 FAX(916)921.0100 <br /> <CambraClient Project 1126 country Club Blvd <br /> ~270 Perkins Ave. Matrix: Solid <br /> <'Sonoma, CA 95476 <br /> -sAttention:: Joe Neely <br /> Work Order#: 9802D58-01-04, 06 Reported: Mar 10, 1998:::: <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#: GCO22598BTECEXC GCO2-2598BTE(E(C GCO22598BTEXEXC GCO22598BTE(ECC GCO22598BTECECC <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: J.Minkel J.Minkel J. Minkel J. Minkel J.Minkel <br /> MS/MSD#: 9802E8502 9802E8502 9802E8502 9802E8502 9802EB502 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 2/25/98 2/25/98 2/25/98 2/25/98 2/25/98 <br /> Analyzed Date: 2/26/98 2/26/98 2/26/98 2/26/98 2/26/98 <br /> Instrument I.D.#: GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc. Spiked: 0.20 mg/Kg 0.20 mg/Kg 0.20 mg/Kg 0.60 mg/Kg 1.2 mg/Kg <br /> Result: 0.20 0.20 0.20 0.60 1.2 <br /> MS% Recovery: 100 100 100 100 100 <br /> Dup. Result: 0.20 0.20 0.20 0.60 1.1 <br /> MSD% Recov.: 100 100 100 100 92 <br /> RPD: 0.0 0.0 0.0 0.0 8.7 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS #: BLKOM98 BLK022598 BLK022598 ELK022598 BLK022598 <br /> Prepared Date: 2/25/98 2/25/98 2/25/98 2/25/98 2/25/98 <br /> Analyzed Date: 2/26/98 2/26/98 2/26/98 2/26/98 2/26/98 <br /> Instrument I.D.#: GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc. Spiked: 0.20 mg/Kg 0.20 mg/Kg 0.20 mg/Kg 0.60 mg/Kg 1.2 mg/Kg <br /> LCS Result: 0.22 0.21 0.21 0.64 1.2 <br /> LCS %Recov.: 110 105 105 107 100 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <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 /> SEQUOIA A YTICAL 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 /> I ory <br /> Pr ject Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9802058.000 <4> <br />