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Quality Control Report <br /> for • <br /> Hydrocarbons (BTEX, TPH-G, TPH-D) <br /> Analyzed By: S . Singh Reviewed By: J. Koeiewyn <br /> QC Sample ID: NA -S-BTEX Spike Level : BTEX NA <br /> 050291 -S-TPHG TPHG 1OPPM <br /> NA -S-.TPHD TPHD NA <br /> Sample Matrix: Soil Spiked Sample ID: 691-2254 . 3 <br /> Quality Control Report for Exam Number: 691-2219 .1-2 <br /> Matrix <br /> Method Matrix Spike <br /> Constituent Blank Spike Dup Spike <br /> (mg/kg) (% Rec) (% Rec) Range <br /> Benzene ND NA NA NA <br /> Toluene ND NA NA NA <br /> Ethylbenzene ND NA NA NA <br /> Xylenes ND NA NA NA <br /> TPH-Gasoline ND 100 119 19 <br /> TPH-Diesel ND NA NA NA <br /> i <br /> Method Blank: A method blank demonstrates the presence or <br /> absence of contamination in the analytical <br /> procedure. <br /> Matrix Spike and Matrix Spike Duplicate: A matrix spike is a <br /> sample to which a known amount of analyte has been added. <br /> The percent recovery and percent recovery difference of <br /> the matrix spike and the matrix spike duplicate are <br /> analyzed to measure the accuracy and precision of the <br /> analytical procedure. <br /> NOTES: <br /> TPH: Total Petroleum Hydrocarbons <br /> ND : None Detected <br /> Fresno Modesto Visalia Bakersfield <br />