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LABORATORY CONTROL SAMPL'b.J <br /> QUALITY CONTROL REPORT <br /> for <br /> BTEX/TPH-Gasoline/TPH-Diesel <br /> Analyzed by: A. Iknoian; C. Loukas Reviewed by: C. Loukas; F. Meza„__.._.._._..,.._.._._.,._ <br /> Sample Matrix: Soil Spiked Sample ID: Spiking Soil _ <br /> QC Sample ID: 0102 S-BTEX 0102 S-TPHG-Range 1230 S-TPHD-Range <br /> Twining Laboratories, Inc. Examination Number: 696-7995.9; 696-7995.12 (STEX/Gasoline/Diesel) _ <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 /> Benzene <0.005 0.05 0.037 0.039 74.0 78.0 1. 5.3 <br /> 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 0.85 0.87 34.0 34.8 2.3 <br /> TPH-Diesel Range <1 0 25 23.2 20.6 92.8 82.4 12 <br /> EXPLANATIONS: <br /> Method Blank: The method blank is used to determine if method analytes or other <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 control <br /> sample is analyzed exactly like a sample, and its purpose is to determine <br /> 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 /> ND: None Detected. <br /> Dup: Duplicate. <br /> TPH: Total Petroleum Hydrocarbons. <br /> mg/kg: Milligrams per kilogram {parts per million) <br /> Rev. 3 8194 <br /> fQCBTEXGQ.SOIU <br />