What inherent assumptions are included in the selection

Reference no: EM133376388

Question: 1. Many areas of the United States have combined sewers, where combined sanitary waste and stormwater are treated at the wastewater treatment plant. During heavy rain events, the inflow to the wastewater treatment plant can exceed the treatment capacity, causing a combined sewer overflow (CSO) with discharge of untreated sewage into waterways. The Clean Water Act protects against CSOs.

The hypothetical city Watertown must decide the best approach to decreasing the number of CSO events it experiences. Assume that avoided CSOs incur benefits at $3.50/gal and perform at the full design flow.

The options under consideration include the following:

A: Construction of an additional wastewater treatment plant (WWTP) flow: 1 million gal/yr investment cost: $12 million, annual O&M cost: $1.25 million/yr useful life: 40 yrs

B: Construction of tunnels and reservoirs to store untreated sewage flow: 16 million gal/yr investment cost: $1.4 billion, annual O&M cost: $73,000/yr useful life: 50 yrs

C: Widespread installation of green infrastructure flow: 3.5 million gal/yr investment cost: $65 million, annual O&M cost: $95,000/yr useful life: 30 yrs

AB: Additional WWTP and storage

AC: Additional WWTP and green infrastructure

BC: Storage and green infrastructure

ABC: Additional WWTP, storage, and green infrastructure

Complete an incremental cost-benefit analysis using an annual interest rate of i = 3%.

which option makes the most sense from a cost-benefit perspective?

what inherent assumptions are included in the selection of the best option?

if the city can only secure bonds for $70 million for capital projects, what do you recommend they pursue?

Reference no: EM133376388

Questions Cloud

Discuss three specific ways you could eat fewer animal : Discuss three specific ways you could eat fewer animal products (or less beef) in your current situation. (You do not have to be willing to carry these out.)

Identify any violations of the nasw code of ethics : Identify any violations of the NASW Code of Ethics in relation to confidentiality, self-determination, and informed consent.

Identify at least three ways one can have an impact : identify at least three ways one can have an impact on the carbon cycle by increasing the inflow of carbon into the atmosphere.

What do you think about cancel culture on social media : What connections do you see between the boy reading in the dentist office and Kanye West regarding thinking outside of the box? (Based on video interview

What inherent assumptions are included in the selection : what inherent assumptions are included in the selection of the best option? if the city can only secure bonds for $70 million for capital projects

What is going on with alex : What is going on with Alex? Can the different systems and theories of psychology help explain one or more areas of Alex's life.

How radioactive will the krypton waste generated be after : One large nuclear power plant produces about 400 kilocuries of krypton per hear. Krypton has a half life of 10 year. how radioactive will the krypton waste

How was the giant polystyrene sphinx created : How did Kara Walker arrive at her idea/plan for the piece? What was her brainstorming/ research like? What did she learn through her research?

Advancing cause of sustainable environmental development : Advancing the cause of sustainable environmental development; nonetheless, further action is required to meet the difficulties presented by climate change

User Account

All Pages