The construction industry has a significant impact on the environment which includes waste and pollution. (a)Describe THREE (3) characteristics found in hazardous waste with their potential risks.   ( 5 )  (b)Explain the FIVE (5) critical types of environmental pollution and discuss the method of controlling the pollution.   ( 15 )    ( Total / Jumlah: 20 )

List seven factors that must be considered in the collection of MSW. Define the term; Recycling

Question # 4 (a): Quantify the number of 60 gallons garbage containers a family of eight peoples will need if they are generating domestic solid waste at rate of 2lb/cap/day having a density of 220lb/yd3 and the collection is once a week. Looking for alternative, how many compacted blocks of 35lb would the family produce if family had a home compactor along with the number of cans required? Subject: Environmental Engineering

7-5. Assuming that the quantities of solid wastes generated daily at a commercial facility are distributed normally, with a mean value of 10 yd3 and a standard deviation of 7 yd3, what size container would you recommend for this facility? What are the important tradeoffs in the selection of container size?

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.

Different hazardous wastes were identified in the lecture for MO22. Discuss at least two (2) domestic hazardous wastes that can be found in your home. Discuss how these hazardous waste are manage and disposed in your households. Does your disposal method in compliance to RA 6969 and its IRR?

A town with 2,350 residents wants to establish a municipality owned and operated solid waste( garbage) collection program. They can purchase one of three possible trucks that have the ff. characteristics: Truck A, 18 m3 capacity Truck B, 15 m3 capacity Truck C, 12 m3 capacity If the truck is to collect the refuse for one-fifth of the town each day during a 5-day work week, then every residence will be collected during the week, and the truck will have to make only one trip per day to the landfill. Which truck or trucks will have sufficient capacity. Assume a rate of 1.75 kg/capitald. Assume that the truck is able to compact the refuse to 350 kg/ m3 * 14.1 5,757.5 4,935 24,675 28.787 5 Truck Truck Truck 16.45 A B What is the total tonnage of solid waste to be collected/wk? What is the total weight of waste to be collected everyday? What is the required truck сарacity in cubic meters? Which truck ооо о о о о should be bought ?

7-2. Estimate the maximum amount (by weight) of material that could be separated for recycling from residential MSW using a two-container system. What should be the size of the two containers? Use the waste composition given in Table 3-4, and assume that there are 3.1 residents per residence.   Make the answer as detailed as possible.

A town with 2,350 residents wants to establish a municipality owned and operated solid waste collection program. They can purchase one of three possible trucks that have the ff. characteristics: Truck A, 18 m^3 capacity Truck B, 15 m^3 capacity Truck C, 12 m^3 capacity If the truck is to collect the refuse for one-fifth of the town each day during a 5-day work week, then every residence will be collected during the week, and the truck will have to make only one trip per day to the landfill. Which truck or trucks will have sufficient capacity. Assume a rate of 1.75 kg/capita/d. Assume that the truck is able to compact the refuse to 350 kg/ m^3    What is the total tonnage of solid waste to be collected/wk? What is the total weight of waste to be collected everyday? What is the required truck capacity in cubic meters? Which truck should be bought?

Discuss at least 4 consequences of the inappropriate disposal of refuse. List five factors that must be considered in the collection of Municipal Solid Waste.