A city is considering a reservoir water as its new drinking water source. As a result,...

A city is considering a reservoir water as its new drinking water source. As a result, the city council wants to know how good the reservoir water is to serve this potential purpose. Assume you are the chief engineer of the city utilities; please provide a list of water quality parameters need to be tested and the corresponding testing methods.

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Ally Wells answered 10 months ago

A single lake (referred to as the “City Reservoir”) provides all the drinking water for a...

A single lake (referred to as the “City Reservoir”) provides all the drinking water for a city. The city wants to reduce risks to its water supply by adding a second lake as an additional water source. Two lakes are under consideration and only one will be used. The first lake is located next to the current City Reservoir which allows the city to reduce costs by sharing the single original water pipe from the Reservoir to city. The second...

It is recommended that drinking water contain 1.6 ppm of fluoride. If the local reservoir has...

It is recommended that drinking water contain 1.6 ppm of fluoride. If the local reservoir has a diameter of 450.0 m and a depth of 10.0 m (V= Pi*r2 *h), how many grams of F should be added to the water in the reservoir to give the recommended concentration? If fluoride is provided by hydrogen hexafluorosilicate (H2SiF6), how many grams of H2SiF6 contain Fluoride?

The Flint water crisis began in 2014 when the city of Flint, Michigan switched its drinking...

The Flint water crisis began in 2014 when the city of Flint, Michigan switched its drinking water supply from the Detroit system to the Flint River. How did that change result in increases of lead in drinking water? You must use chemical equations and describe how the equilibria shift with changing pH.

In order to provide drinking water as part of its 50-year plan, a west coast city...

In order to provide drinking water as part of its 50-year plan, a west coast city is considering constructing a pipeline for importing water from a nearby community that has a plentiful supply of brackish ground water. A full-sized pipeline can be constructed at a cost of $95 million now. Alternatively, a smaller pipeline can be constructed now for $75 million and enlarged 18 years from now for another $110 million. The pumping cost will be $25,000 per year higher...

The Ocean City water park is considering the purchase of a new log flume ride. The...

The Ocean City water park is considering the purchase of a new log flume ride. The cost to purchase the equipment is $5,000,000, and it will cost an additional $380,000 to have it installed. The equipment has an expected life of six years, and it will be depreciated using a MACRS 7-year class life. Management expects to run about 150 rides per day, with each ride averaging 25 riders. The season will last for 120 days per year. In the...

Periodically, the county Water Department tests the drinking water at its water distribution center. The lead...

Periodically, the county Water Department tests the drinking water at its water distribution center. The lead levels (parts per billion or ppb) for 10 recent samples are shown below. 2016182228132415261120161822281324152611 Officials want to determine if the median lead level exceeds the EPA action level of 15 ppb. They are unwilling to make any assumptions about the distribution of lead levels. Help them by conducting an appropriate distribution-free test. (1) The observed value of the test statistic is (2) The p-value is (to...

A city with 4% unemployment and no inflation is considering building a new stadium for its...

A city with 4% unemployment and no inflation is considering building a new stadium for its professional football team. The team currently plays in an old stadium owned by the city. It would cost city $500M (M for million) to demolish the old stadium and build a new one at the same location, which the city owns. The new stadium would be expected to last for 40 years and the city would finance the costs of the project by borrowing...

A city water department is considering replacing its main pump. This pump can be kept in...

A city water department is considering replacing its main pump. This pump can be kept in service for an additional two years, or it can be sold for $32,000 and replaced by a new pump. The market value of the current pump will become $28000 and $20000 at the end of the first, and second years, respectively. The operating expenses of the pump are $16,000 during the first year, and $20,000 during the second year. The purchase price of the...

The City of San Antonio is considering various options for providing water in its 50year plan,...

The City of San Antonio is considering various options for providing water in its 50year plan, including desalting. One brackish aquifer is expected to yield desalted water that will generate revenue of $4.1 million per year for the first 4 years, after which less production will decrease revenue by 10% per year each year. If the aquifer will be totally depleted in 23 years, what is the present worth of the desalting option revenue at an interest rate of 8%...

A particular power plant operates with a heat-source reservoir at 350°C and a heat-sink reservoir at...

A particular power plant operates with a heat-source reservoir at 350°C and a heat-sink reservoir at 30°C. It has a thermal efficiency equal to 67% of the Carnot-engine thermal efficiency for the same temperatures. What is the thermal efficiency of the plant? The thermal efficiency of the plant is .

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