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COS Ptd ID :Q378277 MAY 27 '09 14 :06 No .008 P .02 <br /> -tARORATORY CONTROL SAMPLE `" <br /> QUALITY CONTROL REPORT <br /> for <br /> Hydrocarbons <br /> Analyzed by: A. Iknoi n Reviewed by:_r,. 1 ouke; <br /> Sample Matrix: _ Soil _ CIC Sample ID: 122.7 S-STEX 1227 <br /> Twining Laboratories, Inc. Examination Number: 696-7994.5-12 <br /> Constltttent Method LCS LCS LCS LCS LCS RPD <br /> Blank Expected Result Dup. % Rec Dup. % <br /> Result Conc, lmg/kg} Result % Rec. <br /> (rrtglkg) (mglkgl (ntg/kgl <br /> Benren" < 0.005 0.06 0.037 0.035 74.0 70.0 5.6 <br /> Toluene < 0.005 0.05 0.043 0.040 8010 80.0 7.2 <br /> Ethylbcnzone < 0.005 0.05 0.045 0.042 90.0 84.0 0.9 <br /> Xylenes < 0.005 0.15 0.14 0.17 93.0 80.0 15 <br /> TPH-Gasollne Mange < 1.0 2.5 2.1 1.9 85.0 77.0 9.9 <br /> TPH-Diernl flange < 10 1 25 18.1 18,5 72.0 74.0 1.8 <br /> EXPLANATIONS. <br /> Method Blank: The method blank is used to detbrm;nt+ it method analytes or other <br /> interferences are pro6ont in the laboratory environment, the reagents or <br /> apparatus. <br /> Laboratory Cuntroi Sample(LCS): A laboratory control sample is ydnerated by spiking the analyte into a <br /> relatively Inert matrix (clean sand or blank water). The laboratory control <br /> sarnpla is analyzed exactly like a sample, and its purpose is to determine <br /> whothor the methodology is in control And whether the laboratory is <br /> capablo of making accurate and precise measurements. <br /> RPD: Relative Percent Difference. <br /> NV: None Detected <br /> Dup: Duplicate <br /> TPH: Total Petroleum Hydrocarbons <br /> mg/kg; milligrams per kilogram (parts per million) <br /> InCD�E�.S011 <br />