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r - <br /> 1V*4 <br /> LABORATORY CONTROL SAMPLY <br /> QUALITY CONTROL REPORT <br /> forD2I�l <br /> Hydrocarbons Z� <br /> Analyzed by: C. Loukas Reviewed by: R. Stafford MAY Q v <br /> Sample Matrix: Water Spiked Sample ID: SOkina WateiNV! N <br /> ERMIT/ 'NTATAL HEALTH <br /> QC Sample ID: 041295 S-BTEX 041295 S-TPHG-Range SD-Range <br /> Twining Laboratories, Inc. Examination Number: 695-2025.1 <br /> Constituent Method LCS LCS LCS LCS LCS RPD <br /> Blank Expected Result Dup. % Rec Dup. % <br /> Result Conc. (ug/L) Result % Rec. <br /> (ug/L) (ug/L) (ug/L) <br /> Benzene ND 20 19 17 95 85 6 <br /> Toluene ND 20 20 21 100 105 5 <br /> Ethylbenzene ND 20 21 21 105 105 0 <br /> Xylenes ND 60 64 64 107 107 0 <br /> TPH-Gasoline Range ND 200 220 220 110 110 O <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 />