TABLE II
LONG-TERM | |||
SOIL GROUP | SOIL TEXTURE CLASSES (USDA CLASSIFICATION) | ACCEPTANCE RATE gpd/ft2 | |
I | Sands (With S or PS structure and clay mineralogy) | Sand Loamy Sand | 1.2 - 0.8 |
II | Coarse Loams (With S or PS structure and clay mineralogy) | Sand Loamy Sand | 0.8 - 0.6 |
III | Fine Loams (With S or PS structure and clay mineralogy) | Sandy Clay Loam Silt Loam Clay Loam Silty Clay Loam Silt | 0.6 - 0.3 |
IV | Clays (With S or PS structure and clay mineralogy) | Sandy Clay Silty Clay Clay | 0.4 - 0.1 |
The long-term acceptance rate shall not exceed the mean rate for the applicable soil group for food service facilities, meat markets, and other places of business where accumulation of grease can cause premature failure of a soil absorption system. Long-term acceptance rates up to the maximum for the applicable soil group may be permitted for facilities where data from comparable facilities indicates that the grease and oil content of the effluent will be less than 30 mg/l and the chemical oxygen demand (COD) will be less than 500 mg/l.
All joints from the septic tank to the nitrification line shall be watertight.
LC = D x GL x ST x HR/2 x LF
where LC = grease trap liquid capacity (gallons)
D = number of seats in dining area
GL = gallons of wastewater per meal (1.5 single-service; 2.5 full service)
ST = storage capacity factor = 2.5
HR = number of hours open
LF = loading factor = (1.25 interstate highway
= 1.0 other highways and recreational areas
= 0.8 secondary roads)
15A N.C. Admin. Code 18A .1955
Eff. July 1, 1982;
Amended Eff. August 1, 1991; January 1, 1990; August 1, 1988; February 1, 1987;
Temporary Amendment Eff. January 1, 1999;
Amended Eff. August 1, 2000.
Eff. 7/1/1982;
Amended Eff. 8/1/1991; 1/1/1990; 8/1/1988; 2/1/1987;
Temporary Amendment Eff. 1/1/1999;
Amended Eff. 8/1/2000.