Ans only 3.2b 3.2. (a) What percent efficiency must an ash collector for a coal-fired power plant have to meetthe NSPS for coal-fired power plants (Table 3.1)? See inside the back cover for theproperties of typical coal.(b) Is the 0.03 lb/10 Btu rule more or less restrictive than the 1 percent emission rule?(c) At what percent ash in the coal would the two rules be equally restrictive?(d) Why are there two separate restrictions? (To answer this part of the question, you mustknow some of the history of these regulations beyond that presented in this book.)TABLE 3.1Federal standards of performance for new stationary sources (commonly callednew source performance standards [NSPS])This list is an excerpt from the 2015 version of 40CFR60. Standards are listed there for 101 industrial categories.New categories are regularly added, and existing ones modified. This excerpt shows the kind of regulations thatare contained in that much larger compilation.1. Coal-fired power plants whose construction started after September 18, 1978, may not emit the followingto the atmosphere:a. Particulate matter more than 0.03 lb/10 Btu, or 1% of the ash solids in the fuel, whichever is less.b. Sulfur dioxide more than 1.2 lb/10° Btu, or more than 30% of the SO, that would be formed if all thesulfur in the coal were converted to SO2, whichever is less.c. Nitrogen oxides more than 0.6 lb/10° Btu for most coals, or 0.5 lb/10° Btu for sub-bituminous coal.2. Large incinerators shall not emit to the atmosphere gases that contain more than 34 mg/dry standard cubicmeter of particulates. There are also limits of opacity, cadmium, lead, mercury, and acid gases.3. Portland cement plants constructed after June 16, 2008 shall not emit to the atmosphere the following:a. Gases from the kiln containing more than 0.02 lb of particulates/ton of clinker.b. Gases from the clinker cooler containing more than 0.02 lb of particulates/ton of clinker.4. Nitric acid plants shall not emit gases containing more than 3.0 lb of NO2 per ton of nitric acid produced.5. Sulfuric acid plants shall not emit gases containing more than 4 lb of SO2 and/or 0.15 lb of sulfuric acidmist/ton of acid produced (100% basis).The above regulations also limit the opacity of the plumes from these plants, mostly as a control measure,and have very detailed descriptions of testing and monitoring requirements. The Federal Register documentshowing the NSPS regulations for Electric Utility Steam Generating Units (for coal and for other fuels) is42 pages long. The others are mostly shorter.

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As shown in Table 3.1, there are two cases: (1) the plant began operations on September 18, 1978,…

(b) Is the 0.03 lb/10° Btu rule more or less restrictive than the 1 percent emission rule?