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Quality Control Report <br /> for <br /> Hydrocarbons (BTEX, TPH-G, TPH-D) <br /> Analyzed By: 'S . Singh Reviewed By: J. Roelew n <br /> QC Sample ID: 062990 -S-BTEX Spike Level.: BTEX 1ppm <br /> 062890 -S-TPHG TPHG 10212m - <br /> 070290 -S-TP.HD TPHD 100 m <br /> Sample Matrix: Soil . Spiked Sample ID: _ Spiking ' Soi,l <br /> Quality '.:Control Report for Exam Number: 690-3349. 1--12 <br /> Matrix <br /> Method Matrix Spike <br /> Constituent Blank Spike Dup Spike N <br /> (mg/kg) (% Rec) (% Rec) Range <br /> Benzene ND 114 126 12 <br /> !� Toluene ND 122 137 15' <br /> Ethylbenzene ND 122 121 1 <br /> Xylenes ND 124 134 10 <br /> TPH--Gasoline ND 70 94 24 <br /> TPH-Diesel ND 49 41 8 <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 /> Rev. 1 3/90 <br /> page 1 of 1 <br /> (QCBTEXS.WRS) <br /> Fresno Modesto <br /> 00 Visalia. Bakersfield <br /> r <br />