Main Title |
TMDLs for Copper and Zinc for the Caddo River Basin, Arkansas. (HUC-reach 08040102-016, -018, -019, and -023). |
CORP Author |
Tetra Tech, Inc., Fairfax, VA.; Environmental Protection Agency, Dallas, TX. Region VI. |
Year Published |
2008 |
Report Number |
EPA/CN-68-C-02-108 |
Stock Number |
PB2013-100761 |
Additional Subjects |
Water quality standards ;
Water pollution ;
Dissolved oxygen ;
River basins ;
Arkansas ;
Clean water act ;
Copper ;
Nonpoint sources ;
Point sources ;
State regulations ;
US EPA ;
Wasteload allocations ;
Water resources ;
Zinc ;
Total maximum daily loads(TMDLs) ;
Caddo River Basin
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB2013-100761 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
79p |
Abstract |
Section 303(d) of the Clean Water Act and the U.S. Environmental Protection Agency's (EPA) Water Quality Planning and Management Regulations (at Title 40 of the Code of Federal Regulations (CFR) Part 130) require states to develop Total Maximum Daily Loads (TMDLs) for impaired waterbodies. A TMDL establishes the amount of a pollutant that a waterbody can assimilate without exceeding its water quality standard for that pollutant. TMDLs provide the scientific basis for a state to establish water quality-based controls to reduce pollution from both point and nonpoint sources to restore and maintain the quality of the state's water resources (USEPA 1991). A TMDL for a given pollutant and waterbody is composed of the sum of individual wasteload allocations (WLAs) for point sources and load allocations (LAs) for nonpoint sources and natural background levels. In addition, the TMDL must include an implicit or explicit margin of safety (MOS) to account for the lack of knowledge concerning the relationship between pollutant loads and the water quality of the receiving waterbody. |