Exam 15: Improving Water Quality: Controlling Point and Nonpoint Sources

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Under U.S. law, the technology-based effluent limitations are

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D

According to the textbook application, efforts to restore the Chesapeake Bay have been markedly successful.

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All point sources are subject to effluent limitations, which are imposed uniformly within each designated group.

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Suppose two point sources are discharging phosphorus into Wisconsin's Fox River and face the following abatement costs for this pollutant: Point Source 1: TAC1 = 500 + 0.35(A1)2 MAC1 = 0.7A1 Point Source 2: TAC2 = 750 + 1.05(A2)2 MAC2 = 2.1A2, where A1 and A2 represent the abatement of phosphorus effluents in pounds by Source 1 and Source 2, respectively, and TAC and MAC are measured in hundreds of dollars. Assume that the state environmental authority has set the total maximum daily load (TMDL) for the Fox River. To achieve this limit, 40 pounds of phosphorus must be abated across the two point sources. Use this information to answer the following questions. a. If a uniform abatement standard is used by the regulatory authority, what would be the dollar values of TAC and MAC for each source? b. Based on your answer to part (a), is there an economic incentive for the sources to participate in the trading program? Explain briefly. c. Quantify the cost savings associated with a cost-effective abatement allocation achieved through trading. d. What should be the price level of the tradable permits to achieve the cost-effective solution?

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If water quality law prevents the achievement of the efficiency criterion

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A volume-based effluent fee is based on the degree of harm linked to the contaminant released.

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An advantage of the effluent limitations is that they are aligned with the national water quality objectives.

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Empirical research indicates that federal grants added dollar-for-dollar to POTW construction that would not otherwise have been completed at the local level.

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Among the identified point sources contributing to the pollution of Puget Sound are Dow Chemical (D) and Chevron (C). Each firm's cost functions are shown below. MACD = 2.5AD MACC = 3.75AC TACD = 1.25AD2 TACC = 1.875AC2 To meet the effluent limits under the Clean Water Act, each firm has an NPDES permit to release some fixed amount of effluents, so each must abate 30 units. a. At the uniform abatement standard described above, find total abatement costs for both firms. b. Instead of a uniform standard, suppose each firm faces a volume-based, marginal effluent fee (MEF) of $90. How much will each firm abate? c.. If each firm's production is associated with the release of 50 units of effluent, how much will each pay in total effluent fees when facing the $90 marginal effluent fee?

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From an economic perspective, the zero discharge goal meets the efficiency criterion by accounting for both the benefits and costs of that objective.

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Tradeable effluent permit markets can lead to cost savings as long as polluting sources face different marginal abatement costs to control the same pollutant.

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The effluent limitations are set to maximize net benefits.

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According to the text application, mercury contamination is relatively easy to control because mercury emissions tend to remain close to the polluting source.

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According to available data, most water bodies in the United States have met the zero discharge goal.

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The presidential Executive Order that is dedicated to the restoration of the Chesapeake Bay proposes a strictly command-and-control approach to restore and protect this natural resource.

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Giving states control of nonpoint source pollution

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The watershed approach

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Polluting sources have an incentive to abate up to the point where their Marginal Abatement Cost (MAC) equals the Marginal Effluent Fee (MEF), and to pay the fee beyond that point.

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Suppose that the costs and benefits of achieving water quality in New York are modeled as shown below. Use these relationships for any or all of questions . MSB = 80 - 2A MSC = 20 + 2A TSB = 80A - A2 TSC = 20A + A2, where A is the abatement level for conventional pollutants. -In this case, the abatement level associated with benefit-based standards would be:

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The National Pollutant Discharge Elimination System (NPDES) is a permitting system solely for publicly owned treatment works (POTWs).

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