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LABORATORY CONTROL SAMPLE <br /> QUALITY CONTROL REPORT <br /> for <br /> BTEX/TPH-Gasp I ine/TPH-Diesel <br /> _4nalyzed by: C. Loukas Reviewed by: A. tknoian <br /> Sample Matrix: Aqueous Spiked Sample ID: Reagent Water <br /> QC Sample ID: S-STEX S-TPHG-Range 1226 S-TPHD-Flange <br /> (wining Laboratories, Inc. Examination Number.-696-7992.1 (Diesel only) - <br /> Constituent Method LCS LCS LCS LCS LCS RPD <br /> Blank Expected Result Dup. % Rec Dup. % <br /> '¶ Result Conc- (ug/L) Result % Rec. <br /> II (ug/L) jug/L) (ug/L) <br /> Benzene <5.0 20 - - -- -- -- <br /> Toluene <5.O 20 - - - <br /> Ethylbenzene <5-0 20 - - -- -- <br /> Xylenes <5.0 60 - — -- -- <br /> TPH-Gasoline Range <50 200 -- - -- -- - <br /> TPH-Diesel Range <50 500 377 365 75.4 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 /> 1 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 /> / a <br /> .lev, 3 8194 <br /> EGC97EXGDMAT) <br />