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Quality Control. Report <br /> for <br /> Hydrocarbons (BTEX, TPH-G, TPH-D) <br /> Analyzed By: S. Singh Reviewed By: B. Stafford <br /> QC Sample ID: -061592 -S-BTEX Spike Level: BTEX 0 . 0.5ppm <br /> NA -S-TPHG TPHG NA <br /> 061692 -S-TPHD TPHD 5.Oppm <br /> Sample Matrix: Soil Spiked Sample ID: Spiking Soil <br /> Quality Control Report for Exam Number: 692-3214 .2-4 <br /> Matrix <br /> Method Matrix Spike <br /> Constituent Blank Spike Dup Spike <br /> (mg/kg) ( % Rec) (% Rec) Range <br /> Benzene ND 63 91 28 <br /> Toluene ND 96 94 2 <br /> Ethylbenzene ND 99 96 3 <br /> Xylenes ND 96 97 1 <br /> TPH-Gasoline ND NA NA NA <br /> TPH-Diesel. ND 81 62 19 <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 /> NA : Not Available <br /> �ne�utirunq�i�oratoriee.�iu. <br /> F•esno Mooes[o44 Wsaha Bak"field <br />