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Sequoia 680 Chesapcake Drive Redwood City,CA 94 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94* (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> C <br /> ambria Environmenta le roject ID: Sheri W204-4728-0502 <br /> 114465thStreet SteC Matrix: Solid <br /> Oakland, CA 94608 <br /> Attention: Paul Waite QC Sample Group: 6081179-182 Reported: Aug 26, 1996:' <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Lead <br /> Benzene <br /> OC Batch#: SP081996 SP081996 SP081996 SP081996 ME081996 <br /> 8020EXA 8020EXA 8020EXA 8020EXA 601OMDA <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 7420 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 3050 <br /> Analyst: S.Chullakorn S.Chullakorn S.Chullakorn S.Chullakorn T. Le <br /> MS/MSD #: 6081147 6081147 6081147 6081147 6081147 <br /> Sample Cone.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 8/19/96 8/19/96 8/19/96 8/19/96 8/19/96 <br /> Analyzed Date: 8/19/96 8/19/96 8/19/96 8/19/96 8/19/96 <br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2 MV-1 <br /> Cone. Spiked: 0.40 mg/kg 0.40 mg/kg 0.40 mg/kg 1.2 mg/kg 50 mg/kg <br /> Result: 0.40 0.39 0.42 1.2 48 <br /> MS%Recovery: 100 98 105 100 96 <br /> Dup. Result, 0.44 0.43 0.46 1.4 48 <br /> MSD % Recov.: 110 108 115 117 96 <br /> RPD: 9.5 9.8 9.1 15 0.0 <br /> RPD Limit: 0-20 0.20 0-20 0-20 0-20 <br /> LCS #: 2LCS081996 2LCS081996 2LCS081996 2LCS081996 LCS081996 <br /> Prepared Date: 8/19/96 8/19/96 8/19/96 8/19/96 8/19/96 <br /> Analyzed Date: 8/19/96 8/19/96 8/19/96 8/19/96 6/19/06 <br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2 MV-1 <br /> Cone. Spiked: 20 pg/L 20 lig/L 20pg/L 60lig/L 50 mg/kg <br /> LCS Result: 22 21 22 64 53 <br /> LCS % Recov.: 110 105 110 107 106 <br /> MS/MSD--- <br /> LCS 50-150 50.150 50-150 50-150 80-120 <br /> Control Limits <br /> Please Note: <br /> The LCS is a control sample of known,interferent-fres matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL, #1271 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 /> Melissa A. Brewer MS=Matrix Spike, MSD=MS Duplicate, RPD;;7-Relative% Difference <br /> Client Services Representative 6081179.CAM <4> <br />