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St <br /> 4D— <br /> Sequoia 0680 Chesapeake Drive Redwood City, (,CA 94063 <br /> 415) 344.9600 FAX(415)364.9333 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988.9600 FAX(510)988.9673 <br /> Analytical 819 Striker Avenue,Suitt 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921.01 OD <br /> Terra Vac :..:..:::....: :.: <br /> Client Project ID: Chevron 9-4054, 30-0212 <br /> 14798 Wicks Blvd. Matrix: Solid <br /> San Leandro, CA 94577 <br /> Attention Tim Warner Work Order# 95031151 -01-06 <br /> ::..:. <br /> Reported:..,... <br /> Mar 29 1995 <br /> QUALITY CONTROL DATA REPORT <br /> I <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Batch#: GCO32495BTEXEXB GCO32495BTEXEXB GCO32495BTEXEXB G0032495BTEXEXB <br /> [A:naly. Method: EPA 8020 EPA 6020 EPA a= EPA 8020Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: E.Cunanan E.Cunanan E.Cunanan <br /> E.Cunanan I <br /> NIS/fNSD#: 950361502 950361502 950361502 950361502 <br /> Sample Cone.: N.D. N.Q. N.D. N.D. <br /> Prepared Date: 3/24/95 3/24/95 3/24/95 3/24/95 i <br /> Analyzed Date: 3/24/95 3/24/95 3/24/95 3/24/95 <br /> Instrument I.D.#: GCHP1 GCHP1 GCHP1 GCHP1 <br /> Cone.Spiked: 0.20 mg/Kg 0.20 mg/Kg 0.20 mg/Kg 0.60 mg/Kg <br /> Result: 0.15 0.16 0.16 4.47 <br /> MS%Recovery: 75 so 80 78 j <br /> Dup. Result: 0.16 0.16 0.16 0.47 <br /> MSD%Recov.: 80 80 80 76 <br /> RPD: 6.5 0.0 0.0 0.0 <br /> RPD Limit: 0-50 0-50 0-50 0-50 <br /> ::::.:.......... <br /> LCS#: <br /> Prepared Date: - <br /> Analyzed Date: <br /> Instrument I.D.#: <br /> Cone.Spiked: <br /> LCS Result: <br /> LCS%Recov.: <br /> LCS <br /> Control Limits 55.145 47-149 47-155 56-140 <br /> Please Note: <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, ; <br /> SE 01 A ALYTICAL 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 /> I he recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> I� <br /> interference,the LCS recovery Is to be used to validate the batch. <br /> in <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9503H51.TTT <1> <br />