Why scientists considered arsenic, chromium and mercury traces in the atmosphere are very dangerous. Justify your answer with sources, and effects on human health

Q)You are working in a mining industry and your higher official asked you to submit a report on environmental impacts due to extraction of mineral resources. Write any six impacts during extraction of minerals and processing of minerals?

Q12. Discuss how you would run a sanitary landfilling operation in your city. Be sure to include the technical (operational requirements), economic and environmental health considerations.

Q7. You are going to your friend’s village for a vacation. You noticed the tannery industry released the waste water without any treatment in the nearby wadi. You were shocked and send a detail report to the government regarding the impacts of tannery industry waste water in the wadi. Can you write the reason (Any five reason) you have sent to the government.

What methods are available to determine flow and flow in rivers.
Explain with a paragraph.
Describe the three methods you will choose from these methods by explaining and exemplifying them in detail.

To meet the tolerance required for a surveying project, it is necessary to use a total station. An obstacle makes it impossible to obtain a direct line of sight. Explain one technique that you would use to establish the line of sight past the obstacle. Use a sketch if necessary (0.5 marks)

Assume that a two-lane small road crosses a two-lane main road at a right angle making a four-leg intersection where the traffic on the small road controlled by a yield sign. A shopping mall is located 108.24 ft from the centerline of the outside lane of the main road and 12 m from the centerline of the nearest lane of the minor road. Determine the maximum velocity (in km/h) that can be allowed on the small road if the speed limit on the main road is 39.77 mph. Grades of both the roads are leveled.

Assume you are conducting a parking study in your University. You need to explain the processes/tasks that you will undertake to complete this study. You need to explain how you will do different tasks and how you will present the collected data.

You are the Engineer In Charge for a large paving project in New York City. There is some additional paving work being added to the mainline expressway job involving approximately 25,000 metric tons of asphalt. The additional work involves paving nine (9) ramps along the mainline expressway. Due to the Maintenance and Protection of Traffic requirements, the ramps will each be paved on their own night. The total estimated quantity is 400 Metric Tons of Superpave Top Asphalt and 500 Metric Tons of Superpave Binder Asphalt. The Contractor states that it will cost him $90.00 per metric ton to place the asphalt, which is far above his $65.00 per metric ton bid price.

1. Based on what you know, is the Contractor telling the truth and would you accept this renegotiated cost? (Night differential is an increase of 10.00% on wages only.)
2. What other considerations might you have regarding this price?

1. During and after the commissioning and turn-over process, the design and construction team need to provide the owner with many important documents for the operation of the building. These include all of the following, except:

   		A list of things that the contractor secretly left out of the building to save costs.
   		Operations and maintenance manuals for installed equipment
   		Final construction drawings, typically called "As Built" drawings. These incorporate any minor changes made during construction.
   		Design calculations for building systems.
   		Warranty, test-and-balance, and inspection documents.
   		Building Information Modeling (BIM) data, if included in the contract.
   		Samples and inventories of spare parts and materials used in the construction, to facilitate repairs.