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The U.S. Department of Energy in 1991 estimated the installed retrofit cost per ton of SO 2 pollution control equipment (scrubbers) on existing units would be in the $665– $736/ton range. [30] However, 2005 was the first year the price of an SO 2 allowance reached this level.
[28] and then multiply the hours by the per hour average labor cost. [29] Labor burdens, material costs, construction equipment costs, and, if applicable, subcontractor costs are also extended on the estimate detail form. [30]
Radon is measured in picocuries per liter of air (pCi/L) or becquerel per cubic meter (Bq m-3). Both are measurements of radioactivity. The World Health Organization (WHO) sets the ideal indoor radon levels at 100 Bq/m-3. [97] In the United States, it is recommend to fix homes with radon levels at or above 4 pCi/L.
The legislation continues by specifying goals for the Wind Energy Research Program, "(i) reduce average wind energy costs to 3 to 5 cents per kilowatt hour by 1995;(ii) reduce capital costs of new wind energy systems to $500 to $750 per kilowatt of installed capacity by 1995; (iii) reduce operation and maintenance costs for wind energy systems ...
The construction industry is the number one user of phosphogypsum in 2020, with 10.5 Mt used as concrete set retarder and 3.5 Mt used in drywall. [13] It is also used as a chemical feedstock for producing sulfates , and as a soil conditioner similar to regular gypsum. [ 14 ]
EPA recommends that all homes should be monitored for radon. If testing shows levels less than 4 picocuries radon per liter of air (160 Bq/m 3), then no action is necessary. For levels of 20 picocuries radon per liter of air (800 Bq/m 3) or higher, the home owner should consider some type of procedure to decrease indoor radon levels. [1]
Submissions must be mailed in. Published materials are paid a rate of $20 per page. (Note: The Antioch Review is currently on hiatus as it deals with the effects of the pandemic. Check for updates ...
V08 Physical Activity Spaces and Equipment, providing indoor fitness space at no cost receives 2 points either the space includes two types of exercises or equipment that allow use by at least 5% of occupants at any time or has minimum size of 25 sq. m plus 0.1 sq. m per occupant until 930 sq. m, but WELL also allows if the project gives free ...