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680 Chesapeake Drive Redwood City,CA 9# (415) 364-9600 FAX(415) 364.9233 <br /> Sequoia * 404 N.Wiget Lane Walnut Creek,CA 94 is (510) 988-9600 FAX(514)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Cambria Environmental Tech. Client Project ID 204-4728-0502 <br /> 1144 66th St., Ste, C Matrix: Solid <br /> Oakland, CA 94608 <br /> ,Attention: Paul Waite Work Order#: <br /> 9608626 02-15 Reported: 4 Sep 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#: GCO82096BTEXEXB GC082096BTEXEXB GCO82096BTEXEXB GC082096BTEXEXB <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: J.Heider J. Heider J.Heider J.Heider <br /> MS/MSD #: 960899912 960899912 960899912 960899912 <br /> Sample Conc: N.D. N.D. N.D. N.D. <br /> Prepared Date: 8/20/96 8/20/96 8/20/96 8/20/96 <br /> Analyzed Date: 8/20/96 8/20/96 8/20/96 8/20/96 <br /> Instrument I.D.#: GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc. Spiked: 0.20 mg/Kg 0.20 mg/Kg 0.20 mg/Kg 0.60 mg/Kg <br /> Result: 0.20 021 0.21 0.63 <br /> MS % Recovery: 100 105 105 105 <br /> Dup. Result: 0.19 0.19 0.20 0.59 <br /> MSD% Recov.: 95 95 100 98 <br /> RPD: 5.1 10 4.9 6.6 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> 3-31 <br /> LCS #: BLK082096 BLK082096 BLK082096 BLK082096 <br /> Prepared Date: 8/21/96 8/21/96 8/21/96 8/21/96 <br /> Analyzed Date: 8/21/96 8/21/96 8/21/96 8/21/96 <br /> Instrument I.D.#: GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc. Spiked: 0.20 mg/Kg 0.20 mg/Kg 0.20 mg/Kg 0.60 mg/Kg <br /> LCS Result: 0.20 0.20 0.20 0.60 <br /> LCS% Recov.: 100 100 100 100 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 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 ANALYTICAL preparation,and analyftal 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 /> Kevin Follett <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9608B26.CCC <1> <br />