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e0 680 Chesapeake Drive Redwood City,CA 9 (415) 364-9600 FAX(415) 364-9233 <br /> Squoia <br /> 404 N.Wiget Lane Walnut Creek,CA 94 (510) 988.9600 FAX(510)988-9673 <br /> A <br /> 819 Striker Avenue,Suite 8 Sacramento,C 95834 (916) 921-9600 FAX(916)921-0100 <br /> Analytical <br /> Caiiibria Environmental' <br /> Client Project ID 81hiell -4204-4128-0502 <br /> 1144 65th Street Ste C Matrix: Solid <br /> Oakland, CA 94608 Reported: Aug 26, 1996:..: <br /> Attention: Paul Waite QC Sample Group: 6081179-182 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: SP082096 SP082096 SP082096 SP082096 <br /> 8020EXA 8020EXA 8020EXA 8020EXA <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: K.Nill K.Nill K.Nill K.Nifi <br /> MS/MSD#: 6081062 6081062 6081062 6081062 <br /> Sample Cone.: 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 6/20/96 8/20/96 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 <br /> Cone. Spiked: 0.40 mg/kg 0.40 mg/kg 0.40 mg/kg 1,2 mg/kg <br /> Result: 0.49 0.48 0.49 1.5 <br /> MS % Recovery: 123 120 123 125 <br /> Dup. Result: 0.54 0.52 0.53 1.6 <br /> MSD % Recov.: 135 130 133 133 <br /> RPD: 9.7 8.0 7.8 6.5 <br /> RPD Limit: 0-20 0-20 0-20 0-20 <br /> 0 <br /> LCS#: 5LCS082096 5LCS082096 5LCS082096 5LCS082096 <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.#: HP-5 HP-5 HP-5 HP-5 <br /> Cone. Spiked: 20pg/L 20lig/L 20 jugll- 60 pg/L <br /> LCS Result: 19 19 19 55 <br /> LCS % Recov.: 95 95 95 92 <br /> LCS 50-150 50-150 50.150 501150 <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, #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. It <br /> t recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> 'in"tereirence,the LCS recovery is to be used to validate the batch. <br /> Melissa A. Brewer MS�Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> Client Services Representative 6081179.CAM <5> <br />