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PV <br /> LABORATORY CONTROL SAMPLE <br /> QUALITY CONTROL REPORT <br /> for <br /> BTEXITPH-Gasoline/TPH-Diesel <br /> Analyzed by: C. Loukas Reviewed by: A. Iknoian <br /> Sample Matrix: A ueous Spiked Sample !D: Reagent Water <br /> QC Sample ID: S-BTEX S-TPHG-Range 1226 S-TPHD-Mange <br /> Twining Laboratories, Inc. Examination Number: 696-7992.1 (Diesel only) <br /> Constituent Method LCS LCS LCS LCS LCS RPD <br /> Blank Expected Resuit Dup. % Rec Dup. % <br /> Result Conc. (ug/L) Result % Rec. <br /> (ug/L) (ug/L) (ug/L) <br /> Benzene <5.0 20 -- -- -- -- -- <br /> Toluene <5.0 20 -- -- -- -- -- <br /> Ethylbenzene <5-0 20 -- -- -- -- -- <br /> I Xylenes <5.0 60 - -- — -- <br /> TPH-Gasoline Range <50 200 -- -- -- -- -- <br /> TPH-Diesel Range <50 500 377 365 1 75.4 1 73.0 3.2 <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 /> ug/L: Micrograms per liter (parts per billion). <br /> Rev. 3 8194 <br /> (QC8TEXGO.WAT1 <br /> � l <br />