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f <br /> ' Sequoia 680 Chesapeake Drive Redwood City,CA 9406(415) 364-9600 FAX(415) 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) 921-9600 FAX(916)921-0100 <br /> fl•1 bri .E.nvi.ronn�::::::. <br /> b a o ental Client Project ID: Shell, 341 E. Main , Ripon <br /> Ca <br /> 1144 65th Street Ste C Matrix: Solid <br /> Oakland, CA 94608 <br /> Attention: Scott MacLeod QC Sample Group: 6041807-822 Reported: May 1, 1996;::': <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Lead <br /> Benzene <br /> QC Batch#: SP042596 SP042596 SP042596 SP042596 ME042696 <br /> 8020EXA 8020EXA 8020EXA 8020EXA 601OMDA <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 6010 <br />' Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 3050 <br /> Analyst: M.Brewer M.Brewer M.Brewer M.Brewer J. Kelly <br /> MS/MSD#: 6041023 6041023 6041023 6041023 6041807 <br /> Sample Conc.: N.D. N.D. N.D. N.D. 1.1 mg/kg <br /> Prepared Date: 4/25/96 4/25/96 4/25/96 4/25/96 4/26/96 <br /> Analyzed Date: 4/25/96 4/25/96 4/25/96 4/25/96 4/26/96 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 MV-3 <br /> Conc. Spiked: 0.40 mg/kg 0.40 mg/kg 0.40 mg/kg 1.2 mg/kg 50 mg/kg <br /> Result: 0.28 0.29 0.31 0.95 45 <br /> MS %Recovery: 70 73 78 79 88 <br /> Dup. Result: 0.26 0.27 0.29 0.89 47 <br /> MSD % Recov.: 65 68 73 74 92 <br /> RPD: 7.4 7.1 6.7 6.5 4.4 <br /> RPD Limit: 0-50 0-50 • 0-50 0-50 0-20 <br /> .................................... .......................................................................................................................................... <br /> LCS#: 5LCSO42596 5LCSO42596 5LCSO42596 5LCSO42596 BLK042696 <br /> Prepared Date: 4/25/96 4/25/96 4/25/96 4/25/96 4/26/96 <br /> Analyzed Date: 4/25/96 4/25/96 4/25/96 4/25/96 4/26/96 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 MV-3 <br /> Conc. Spiked: 20Ng/L 20Ng/L 20Ng/L 60Ng/L 50 mg/kg <br /> LCS Result: 17 17 17 54 53 <br /> LCS %Recov.: 85 85 85 90 106 <br /> LCS <br /> Control Limits 50-150 50-150 50-150 50-150 75-125 <br /> Please Note: <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 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 /> C 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 /> `t K Wimer **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> t Proj ct Manager ' <br /> 6041807.CAM <10> <br /> gOa <br /> , <br />