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,' �✓ der!►' ', <br /> 3 <br /> LABORATORY CONTROL SAMPLE <br /> j QUALITY CONTROL REPORT <br /> `- for <br />{ <br /> BTEX/TPH-Gasoline/TPH-Diesel <br /> Analyzed by: A. lknoian Reviewed by: C. Loukas <br /> Sample Matrix: Soil Spiked Sample ID: Spiking Soil <br /> QC Sample ID: 0102 S-BTEX 0102 S-TPHG-Range S-TPHD-Range <br /> Twining Laboratories, Inc. Examination Number: 696-7993.3-5 (BTEX Dilutions only) <br /> Constituent Method LCS LCS LCS LCS LCS RPD <br /> Blank Expected Result Dup. % Rec Dup. % <br /> Result Conc. (mg/kg) Result % Rec. <br /> (mg/kg) (mg/kg) (mg/kg) <br /> i <br /> Benzene <0.005 0.05 0.037 0.039 74.0 78.0 5.3 <br /> I Toluene <0.005 0.05 0.043 0.046 86.0 92.0 6.7 <br /> Ethylbenzene <0.005 0.05 0.044 0.044 88.0 88.0 0 <br /> Xylenes <0.005 0.15 0.13 0.13 86.7 86.7 0 <br /> TPH-Gasoline Range < 1.0 2.5 <br /> EXPLANATIONS: <br /> Ir <br /> Method Blank: The method: blank is used to determine if method analytes or other <br /> j <br /> interferences are present in the laboratory environment, the reagents or <br /> apparatus. <br /> Laboratory Control Sample(LCS): A laboratory control sample is generated by spiking the analyte into a <br /> relatively inert matrix (clean sand or blank water). The laboratory) o y control <br /> sample is analyzed exactly like a sample, and its purpose is to determine <br /> f' whether the methodology is in control and whether the laboratory is <br /> capable of making accurate and precise measurements. <br /> RPD: Relative Percent Difference. <br /> r <br /> ND: None Detected. <br /> i <br /> Dup: Duplicate. <br /> TPH: Total Petroleum Hydrocarbons. <br /> 1 mg/kg: Milligrams per kilogram (parts per million) <br />+l <br /> 1 Rev. 3 8/94 - <br /> 4444 (QCBTEXGD.S01L) <br />