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Rule 4101 : Visible Emissions <br /> Opacity is expected to be under 20 % provided that the equipment is maintained and <br /> operated properly . <br /> Rule 4201 : Particulate Matter Concentration <br /> The concentration of particulate matter from the decontamination project is anticipated <br /> to be less than 0 . 1 gr/scf as long as the equipment is properly maintained and operated, <br /> therefore the system is in compliance. <br /> Rule 4651 : Volatile Organic Compound Emissions from Decontamination of Soil <br /> The proposed soil decontamination system meets the requirements of this rule (Section <br /> 5 .3) . <br /> Rule 4102 : Nuisance <br /> Gasoline vapors will be emitted from this operation and gasoline contains benzene. <br /> Benzene has been identified as a carcinogen and, therefore, is assigned a unit risk value <br /> (UR) . A PTPLU model was run to determine the health risk associated with the gasoline <br /> vapors. <br /> 1 . Determine maximum concentration (7) using PTPLU <br /> (the following is a partial output from PTPLU, see attached sheets for a complete output) <br /> Source Conditions <br /> ernission rate rate = 0 . 341bs/hr <br /> (these data were provided by the applicant) <br /> physical stack height = 9 ft <br /> stack gas temperature = 350 deg. F (Average) <br /> stack gas velocity = 30 ft/sec <br /> stack diameter = 2 in <br />