Construction managers, also called general contractors or project managers, typically do the following: 1  Prepare and negotiate cost estimates, budgets, and work timetables. 2  Select appropriate construction methods and strategies. 3  Interpret and explain contracts and technical information to workers and other professionals.
Denitrification is the process that converts nitrate to nitrogen gas, thus removing bioavailable nitrogen and returning it to the atmosphere. Dinitrogen gas (N2) is the ultimate end product of denitrification, but other intermediate gaseous forms of nitrogen exist (Figure 7).
For example, releases of nitro-. gen into the air from point sources, such as the com-. bustion processes of powerplants and industries, are. called nonpoint sources of water pollution when that. nitrogen reaches water bodies through precipitation. More than 3.2 million tons of nitrogen are deposited in.