A fine ash waste stream contains iron at a concentration of 1,5 mg/kg waste with a LC50 of 90 mg/l, must be disposed of at a landfill with area of 32,5 ha. (presence of Teratogen, mutagen and carcinogen tested negative). Determine the hazard rating of the waste and the landfill site class where it can be disposed of, if 120 000 ton of waste will be disposed annually

A light manufacturing facility produces 125,000 gallons per week of sanitary sewage and uncontaminated wash water which are discharged to a municipal sewer system. A small parts rinsing operation flushes about 12 ounces per week of trichloroethylene down the sink. Does the facility have to manage their wastewater as hazardous waste (see 40 CFR 261.3)?

Sources of Municipal Solid Wastes and composition of the wastes

A flowing stream has a temperature of 14°C, flow rate of 3.0 m}sec, saturated dissolved oxygen content and BODs of 15 mg/L with reaction rate constant of 0.13/day. Waste is discharged into the stream at a flow rate 0.5 m3/sec, temperature of 30°C, ultimate BOD of 50 mg/L and dissolved oxygen content of 2.5 mg/L. The discharged waste has same characteristics as the initial pollutant in the stream with the same reaction rate constant of 0.13/day.Determine: 4. Oxygen deficit in the resulting combine flow at the mixing point.5. Oxygen deficit and dissolved oxygen content in the stream at exactly one day after the initial mixing of the waste into in the stream if the deoxygenationand reaeration rate constants are 0.2/day and 0.4/day, respectively.6. Length of time in days to reach minimum oxygen content, in the stream at the same rate constants given in part e above. 7. The maximum oxygen deficit in the stream at the same rate constants given in part e above. 8. The minimum dissolved oxygen…