15A NCAC 02B .0604       SITE SPECIFIC WATER QUALITY MANAGEMENT PLAN FOR THE GOOSE CREEK WATERSHED (YADKIN PEE-DEE RIVER BASIN): CONTROL TOXICITY INCLUDING AMMONIA 

No activity that results in direct or indirect discharge is allowed if it causes toxicity to the Carolina heelsplitter (Lasmigona decorata) endangered mussel.  For any direct or indirect discharge that may cause ammonia toxicity to the Carolina heelsplitter freshwater mussel, action shall be taken to reduce ammonia (NH3-N) inputs to achieve 0.5 milligrams per liter or less of total ammonia based on chronic toxicity defined in 15A NCAC 02B .0202.  This level of total ammonia is based on ambient water temperature equal to or greater than 25 degrees Celsius.

 

History Note:        Authority G.S. 143-214.1; 143-215.3(a)(1); 143-215.8A;

Eff. February 1, 2009.