15A N.C. Admin. Code 2B.0508

Current through Register Vol. 39, No. 9, November 1, 2024

Section 02B .0508 - TESTS AND MEASUREMENTS APPLICABLE TO SICS

(a) Determination of Type and Frequency of Tests and Measurements:

(1) Introduction. The tables set forth in this Rule are designed to indicate, for any particular water pollution control facility or point source, the minimum standard tests and measurements that are to be performed, the minimum frequency with which the tests and measurements are to be conducted, and the location and minimum number of sampling points that are required.

(2) Determination of Facility Class and SIC Numbers. Before the tables set forth in this Rule may be applied, the standard industrial classification(s) of the activities discharging to the water pollution control facility must be determined from The Standard Industrial Classification (SIC) Manual. The classification of the facility as determined by the Water Pollution Control System Operators Certification Commission, must also be known.

(b) Modification of Test(s) or Measurement(s) Requirements:

(1) If any of the tests and measurements, sampling points, or frequency of sampling requirements, as required in this Rule for a particular SIC group, are not applicable to the discharge of a particular water pollution control facility, or if it can be demonstrated that the objectives of this Section can be achieved by other acceptable means, then such requirements may be waived or modified to the extent that the Director determines to be appropriate.

(2) In addition to the tests and measurements as listed in this Rule applicable to each of the SIC groups, persons subject to this Section may be required to perform such additional tests and measurements at such sampling points and with such frequency as are determined by the Director to be necessary to characterize constituents of the waste discharge and their effect upon the receiving waters. This monitoring may include but not be limited to weekends and holidays to ensure representative sampling and proper operation and maintenance of any facility.

(c) Unclassified Activities:

(1) Any person owning or operating a water pollution control facility who determines that a major SIC group(s) is not listed in this Rule for an activity subject to this Section shall so notify the Division.

(2) The Director shall prescribe on a case-by-case basis the number and location of sampling points and the frequency with which tests and measurements must be made to characterize the quantity or quality of waste discharges resulting from any activity subject to this Section that is not included in the major SIC groups set forth in this Rule and to characterize the effects of the discharges upon the waters of this state.

(d) Index of Major Standard Industrial Groups:

SIC Number Major Products or Services

1400-1499 Mining

2000-2199 Food, Beverage and Tobacco Processing

2200-2299 Textile Processing

2400-2599 Lumber and Wood Products Except Wet Decking

2600-2699 Paper and Allied Products

2800-2899 Chemical and Allied Products

2900-2999 Petroleum Refining and Related Industries

3100-3199 Leather and Leather Products

3400-3699 Fabricated Metal Products Except Ordnance, Machinery and Transportation Equipment

Machinery Electrical Machinery, Equipment and Supplies

4900-4939 Electric, and Gas Services

4941 Water Supply

4952 Wastewater and all facilities discharging primarily domestic wastewater

7000-8999 Services

Abbreviations for sampling locations and frequencies to be used with SIC monitoring requirements:

"I" means influent "E" means effluent "U" means upstream "D" means downstream

"2/month" means samples are collected twice per month with a required 10 day interval between the collection of the samples

"3/week" means samples are collected three times per week on three separate days

MINING

MINIMUM REQUIREMENTS FOR SIC 1400-1499

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	Turbidity	E	Monthly	Monthly	Monthly	Monthly
2.	Settleable Matter	E	Monthly	Monthly	Monthly	Monthly
3.	TSS	E	Monthly	Monthly	Monthly	Monthly
4.	pH	E	Monthly	Monthly	Monthly	Monthly
5.	Toxics and Toxicity	**	**	**	**

FOOD AND BEVERAGE PROCESSING AND TOBACCO PROCESSING

MINIMUM REQUIREMENTS FOR SIC 2000-2199

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	pH	E	Weekly	Weekly	3/week	Daily
2.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
3.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
4.	TSS	E	2/month	Weekly	3/week	Daily
5.	Ammonia Nitrogen	E	Monthly	2/month	Weekly	Weekly
6.	Total Nitrogen	E	*	*	*	*
7.	Total Phosphorus	E	*	*	*	*
8.	Toxics and Toxicity	**	**	**	**

WATER QUALITY LIMITED

1.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily
2.	Dissolved Oxygen	U,D	Weekly	Weekly	3/week+	3/week+
3.	pH	E	Weekly	Weekly	3/week	Daily
4.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
5.	Temperature, °C	U,D	Weekly	Weekly	3/week+	3/week+
6.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
7.	TSS	E	2/month	Weekly	3/week	Daily
8.	Ammonia Nitrogen	E	2/month	Weekly	3/week	Daily
9.	Total Nitrogen	E	*	*	*	*
10.	Total Phosphorus	E	*	*	*	*
11.	Toxics and Toxicity	**	**	**	**
12.	Conductivity	E	Weekly	Weekly	3/week	Daily
13.	Conductivity	U,D	Weekly	Weekly	3/week+	3/week+

TEXTILE PROCESSING

MINIMUM REQUIREMENTS FOR SIC 2200-2299

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	pH	E	Weekly	Weekly	3/week	Daily
2.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
3.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
4.	COD	E	2/month	Weekly	3/week	Daily
5.	TSS	E	2/month	Weekly	3/week	Daily
6.	Total Nitrogen	E	*	*	*	*
7.	Total Phosphorus	E	*	*	*	*
8.	Toxics and Toxicity	**	**	**	**

WATER QUALITY LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily
2.	Dissolved Oxygen	U,D	Weekly	Weekly	3/week+	3/week+
3.	pH	E	Weekly	Weekly	3/week	Daily
4.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
5.	Temperature, °C	U,D	Weekly	Weekly	3/week+	3/week+
6.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
7.	COD	E	2/month	Weekly	Weekly	Weekly
8.	TSS	E	2/month	Weekly	3/week	Daily
9.	Total Nitrogen	E	*	*	*	*
10.	Total Phosphorus	E	*	*	*	*
11.	Toxics and Toxicity	**	**	**	**
12.	Conductivity	E	Weekly	Weekly	3/week	Daily
13.	Conductivity	U,D	Weekly	Weekly	3/week+	3/week+

LUMBER AND WOOD PRODUCTS (EXCLUDING WET DECKING)

MINIMUM REQUIREMENTS FOR SIC 2400-2599

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	pH	E	Weekly	Weekly	3/week	Daily
2.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
3.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
4.	COD	E	Monthly	2/month	Weekly	3/week
5.	Total Phenols	E	2/month	Weekly	3/week	Daily
6.	TSS	E	2/month	Weekly	3/week	Daily
7.	Total Nitrogen	E	*	*	*	*
8.	Total Phosphorus	E	*	*	*	*
9.	Toxics and Toxicity	**	**	**	**

WATER QUALITY LIMITED

1.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily
2.	Dissolved Oxygen	U,D	Weekly	Weekly	3/week+	3/week+
3.	pH	E	Weekly	Weekly	3/week	Daily
4.	Temperature, 0C	E	Weekly	Weekly	3/week	Daily
5.	Temperature, 0C	U,D	Weekly	Weekly	3/week+	3/week+
6.	BOD, 5-day, 200C	E	2/month	Weekly	3/week	Daily
7.	COD	E	2/month	Weekly	3/week	Daily
8.	Total Phenols	E	2/month	Weekly	3/week	Daily
9.	TSS	E	2/month	Weekly	3/week	Daily
10.	Total Nitrogen	E	*	*	*	*
11.	Total Phosphorus	E	*	*	*	*
12.	Toxics and Toxicity	**	**	**	**
13.	Conductivity	E	Weekly	Weekly	3/week	Daily
14.	Conductivity	U,D	Weekly	Weekly	3/week+	3/week+

PAPER AND ALLIED PRODUCTS

MINIMUM REQUIREMENTS FOR SIC 2600-2699

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	pH	E	Weekly	Weekly	3/week	Daily
2.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
3.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
4.	TSS	E	2/month	Weekly	3/week	Daily
5.	Total Nitrogen	E	*	*	*	*
6.	Total Phosphorus	E	*	*	*	*
7.	Toxics and Toxicity	**	**	**	**

WATER QUALITY LIMITED

1.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily
2.	Dissolved Oxygen	U,D	Weekly	Weekly	3/week+	3/week+
3.	pH	E	Weekly	Weekly	3/week	Daily
4.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
5.	Temperature, °C	U,D	Weekly	Weekly	3/week+	3/week+
6.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
7.	TSS	E	2/month	Weekly	3/week	Daily
8.	Total Nitrogen	E	*	*	*	*
9.	Total Phosphorus	E	*	*	*	*
10.	Toxics and Toxicity	**	**	**	**
11.	Conductivity	E	Weekly	Weekly	3/week	Daily
12.	Conductivity	U,D	Weekly	Weekly	3/week+	3/week+

CHEMICAL AND ALLIED PRODUCTS

MINIMUM REQUIREMENTS FOR SIC 2800-2899

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	pH	E	Weekly	Weekly	3/week	Daily
2.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
3.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
4.	TSS	E	2/month	Weekly	3/week	Daily
5.	Total Nitrogen	E	*	*	*	*
6.	Total Phosphorus	E	*	*	*	*
7.	Toxics and Toxicity	**	**	**	**

WATER QUALITY LIMITED

1.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily
2.	Dissolved Oxygen	U,D	Weekly	Weekly	3/week+	3/week+
3.	pH	E	Weekly	Weekly	3/week	Daily
4.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
5.	Temperature, °C	U,D	Weekly	Weekly	3/week+	3/week+
6.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
7.	TSS	E	2/month	Weekly	3/week	Daily
8.	Total Nitrogen	E	*	*	*	*
9.	Total Phosphorus	E	*	*	*	*
10.	Toxics and Toxicity	**	**	**	**
11.	Conductivity	E	Weekly	Weekly	3/week	Daily
12.	Conductivity	U,D	Weekly	Weekly	3/week+	3/week+

PETROLEUM REFINING AND RELATED INDUSTRIES

MINIMUM REQUIREMENTS FOR SIC 2900-2999

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	pH	E	Weekly	Weekly	3/week	Daily
2.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
3.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
4.	TSS	E	2/month	Weekly	3/week	Daily
5.	Total Phenols	E	2/month	Weekly	3/week	Daily
6.	Oil and Grease	E	2/month	Weekly	3/week	Daily
7.	Total Nitrogen	E	*	*	*	*
8.	Total Phosphorus	E	*	*	*	*
9.	Toxics and Toxicity	**	**	**	**

WATER QUALITY LIMITED

1.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily
2.	Dissolved Oxygen	U,D	Weekly	Weekly	3/week+	3/week+
3.	pH	E	Weekly	Weekly	3/week	Daily
4.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
5.	Temperature, °C	U,D	Weekly	Weekly	3/week+	3/week+
6.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
7.	TSS	E	2/month	Weekly	3/week	Daily
8.	Total Phenols	E	2/month	Weekly	3/week	Daily
9.	Oil and Grease	E	2/month	Weekly	3/week	Daily
10.	Total Nitrogen	E	*	*	*	*
11.	Total Phosphorus	E	*	*	*	*
12.	Toxics and Toxicity	**	**	**	**
13.	Conductivity	E	Weekly	Weekly	3/week	Daily
14.	Conductivity	U,D	Weekly	Weekly	3/week+	3/week+

LEATHER AND LEATHER PRODUCTS

MINIMUM REQUIREMENTS FOR SIC 3100-3199

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	pH	E	Weekly	Weekly	3/week	Daily
2.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
3.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
4.	TSS	E	2/month	Weekly	3/week	Daily
5.	COD	E	2/month	Weekly	Weekly	Daily
6.	Ammonia Nitrogen	E	Monthly	Weekly	Weekly	Weekly
7.	Oil and Grease	E	2/month	Weekly	3/week	Daily
8.	Turbidity	E	Weekly	3/week	Daily	Daily
9.	Total Nitrogen	E	*	*	*	*
10.	Total Phosphorus	E	*	*	*	*
11.	Toxics and Toxicity	**	**	**	**

WATER QUALITY LIMITED

1.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily
2.	Dissolved Oxygen	U,D	Weekly	Weekly	3/week+	3/week+
3.	pH	E	Weekly	Weekly	3/week	Daily
4.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
5.	Temperature, °C	U,D	Weekly	Weekly	3/week+	3/week+
6.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
7.	TSS	E	2/month	Weekly	3/week	Daily
8.	COD	E	2/month	Weekly	3/week	Daily
9.	Ammonia Nitrogen	E	2/month	Weekly	3/week	Daily
10.	Oil and Grease	E	2/month	Weekly	3/week	Daily
11.	Turbidity	E	Weekly	Weekly	3/week	Daily
12.	Total Nitrogen	E	*	*	*	*
13.	Total Phosphorus	E	*	*	*	*
14.	Toxics and Toxicity	**	**	**	**
15.	Conductivity	E	Weekly	Weekly	3/week	Daily
16.	Conductivity	U,D	Weekly	Weekly	3/week+	3/week+

FABRICATED METAL PRODUCTS EXCEPT ORDINANCE: MACHINERY AND TRANSPORTATION EQUIPMENT MACHINERYELECTRICAL MACHINERY, EQUIPMENT AND SUPPLIES

MINIMUM REQUIREMENTS FOR SIC 3400-3699

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	pH	E	Weekly	Weekly	3/week	Daily
2.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
3.	Oil and Grease	E	2/month	Weekly	3/week	Daily
4.	Total Nitrogen	E	*	*	*	*
5.	Total Phosphorus	E	*	*	*	*
6.	Toxics and Toxicity	**	**	**	**
7.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily

WATER QUALITY LIMITED

1.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily
2.	pH	E	Weekly	Weekly	3/week	Daily
3.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
4.	Oil and Grease	E	2/month	Weekly	3/week	Daily
5.	Total Nitrogen	E	*	*	*	*
6.	Total Phosphorus	E	*	*	*	*
7.	Toxics and Toxicity	**	**	**	**

ELECTRICAL AND GAS SERVICES

MINIMUM REQUIREMENTS FOR SIC 4900-4939

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	pH	E	Weekly	Weekly	Weekly	Weekly
2.	Temperature, °C	E	Weekly	Weekly	Weekly	Weekly
3.	Total Nitrogen	E	*	*	*	*
4.	Total Phosphorus	E	*	*	*	*
5.	Toxics and Toxicity	**	**	**	**

WATER QUALITY LIMITED

1.	Dissolved Oxygen	E	Weekly	Weekly	Weekly	Weekly
2.	pH	E	Weekly	Weekly	Weekly	Weekly
3.	Temperature, °C	E	Weekly	Weekly	Weekly	Weekly
4.	Total Nitrogen	E	*	*	*	*
5.	Total Phosphorus	E	*	*	*	*
6.	Toxics and Toxicity	**	**	**	**

Note: The following monitoring for steam electric generating establishments discharging once through cooling water or cooling tower blowdown shall be required whether or not the discharge is from a classified facility.

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	Temperature, °C	E	Cont.	Cont.	Cont.	Cont.
2.	Temperature, °C	U, D	3/week+	3/week+	3/week+	3/week+
3.	Flow	Continuous during discharge	Continuous during discharge	Continuous during discharge	Continuous during discharge

WATER SUPPLY PLANTS

MINIMUM REQUIREMENTS FOR SIC 4941

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	Settleable Solids	E	Weekly	Weekly	Weekly	Weekly
2.	TSS	E	2/month	2/month	2/month	2/month
3.	Turbidity	E	Weekly	Weekly	Weekly	Weekly
4.	pH	E	Weekly	Weekly	Weekly	Weekly
5.	Chloride	E	Weekly	Weekly	Weekly	Weekly

DOMESTIC WASTEWATER AND OTHER FACILITIES DISCHARGING PRIMARILY DOMESTIC

MINIMUM REQUIREMENTS FOR SIC 4952

EFFLUENT LIMITED

	REQUIRED TEST	LOCATION	FREQUENCY
			CLASS I	CLASS II	CLASS III	CLASS IV
1.	pH	E	2/month	Weekly	3/week	Daily
2.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
3.	BOD, 5-day, 20°C	I,E	2/month	Weekly	3/week	Daily
4.	TSS	I,E	2/month	Weekly	3/week	Daily
5.	Ammonia Nitrogen	E	Monthly	2/month	Weekly	3/week
6.	Fecal Coliform	E	2/month	Weekly	3/week	Daily
7.	Total Nitrogen	E	*	*	*	*
8.	Total Phosphorus	E	*	*	*	*
9.	Toxics and Toxicity	**	**	**	**

WATER QUALITY LIMITED

1.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily
2.	Dissolved Oxygen	U,D	Weekly	Weekly	3/week+	3/week+
3.	pH	E	2/month	Weekly	3/week	Daily
4.	Temperature, °C	E	Daily	Daily	Daily	Daily
5.	Temperature, °5	U,D	Weekly	Weekly	3/week+	3/week+
6.	BOD, 5-day, 20°C	I,E	2/month	Weekly	3/week	Daily
7.	TSS	I,E	2/month	Weekly	3/week	Daily
8.	Ammonia Nitrogen	E	2/month	Weekly	3/week	Daily
9.	Residual Chlorine	E	2/week	2/week	3/week	Daily
10.	Fecal Coliform	E	2/month	Weekly	3/week	Daily
11.	Fecal Coliform	U,D	2/month	Weekly	3/week+	3/week+
12.	Conductivity	E	Weekly	Weekly	3/week	Daily
13.	Conductivity	U,D	Weekly	Weekly	3/week+	3/week+
14.	Total Nitrogen	E	*	*	*	*
15.	Total Phosphorus	E	*	*	*	*
16.	Toxics and Toxicity	**	**	**	**

SERVICES

MINIMUM REQUIREMENTS FOR SIC 7000-8999

EFFLUENT LIMITED

		REQUIRED TEST	LOCATION	FREQUENCY
				CLASS I	CLASS II	CLASS III	CLASS IV
1.		pH	E	Weekly	Weekly	3/week	Daily
2.		Temperature, °C	E	Weekly	Weekly	3/week	Daily
3.		BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
4.		TSS	E	2/month	Weekly	3/week	Daily
5.		Ammonia Nitrogen	E	Monthly	2/month	Weekly	3/week
6.	Detergents (MBAS)	E	2/month	Weekly	3/week	Daily
7.	Fecal Coliform	E	2/month	Weekly	3/week	Daily
8.	Total Nitrogen	E	*	*	*	*
9.	Total Phosphorus	E	Monthly	2/month	Weekly	3/week
10.	Toxics and Toxicity	**	**	**	**

WATER QUALITY LIMITED

1.	Dissolved Oxygen	E	Weekly	Weekly	3/week	Daily
2.	Dissolved Oxygen	U,D	Weekly	Weekly	3/week+	3/week+
3.	pH	E	Weekly	Weekly	3/week	Daily
4.	Temperature, °C	E	Weekly	Weekly	3/week	Daily
5.	Temperature, °C	U,D	Weekly	Weekly	3/week+	3/week+
6.	BOD, 5-day, 20°C	E	2/month	Weekly	3/week	Daily
7.	TSS	E	2/month	Weekly	3/week	Daily
8.	Ammonia Nitrogen	E	Monthly	2/month	Weekly	3/week
9.	Detergents (MBAS)	E	2/month	Weekly	3/week	Daily
10.	Fecal Coliform	E	2/month	Weekly	3/week	Daily
11.	Total Nitrogen	E	*	*	*	*
12.	Total Phosphorus	E	*	*	*	*
13.	Toxics and Toxicity	**	**	**	**
14.	Conductivity	E	Weekly	Weekly	3/week	Daily
15.	Conductivity	U,D	Weekly	Weekly	3/week+	3/week+

+ Upstream and Downstream monitoring in water quality limited waters is to be conducted three times per week during June, July, August, and September, and once per week during the rest of the year.

* Total Nitrogen and Phosphorus Monitoring

(1) Monitoring Requirements

(A) All facilities equal to or greater than 50,000 gpd, shall monitor for total N and P.

(B) Facilities less than 50,000 gpd shall monitor for total N and P when discharging into nutrient sensitive waters as designated by the Division.

(2) Monitoring frequency for total N and P is based on river subbasins in two separate areas of the state as follows:

(A) Western area includes the French Broad, Broad, Savannah, New, Watauga, Little Tennessee, and Hiwassee:

Facility Design Capacity: Frequency

(i) 50,000 gpd or higher Semi-annually

(ii) 1,000,000 gpd or higher Quarterly.

(B) Piedmont and Eastern area includes the Catawba, Lumber, Yadkin, Cape Fear, Chowan, Neuse, Pasquotank, Roanoke, Tar-Pamlico, and White Oak:

Facility Design Capacity Frequency

(i) 50,000 gpd or higher Quarterly

(ii) 1,000,000 gpd or higher Monthly.

(3) Definition for Total Nitrogen and Total Phosphorus:

(A) Total Nitrogen shall be the sum of total Kjeldahl nitrogen, nitrate nitrogen, and nitrite nitrogen expressed as "N" in milligrams per liter (mg/L).

(B) Total Phosphorus shall include all orthophosphates and condensed phosphates, both dissolved and particulate, organic and inorganic, expressed as "P" in milligrams per liter (mg/L).

** Specific test type, conditions, and limitations shall be defined by permit. Toxicity limits shall be applied to all major discharges and all discharges of complex wastewater. Toxicity limitations and monitoring requirements may be applied to permits for other discharges when such discharge may impair the best use of the receiving water by the discharge of toxic substances in toxic amounts.

Specific frequency shall be defined by individual permit conditions. For most facilities with continuous and regularly occurring discharges, frequency will be defined as a minimum of quarterly.

15A N.C. Admin. Code 02B .0508

Authority G.S. 143-215.3(a)(1); 143-215.64; 143-215.65; 143-215.66;
Eff. February 1, 1976;
Amended Eff. April 1, 1993; December 1, 1984; November 1, 1978;
Readopted Eff. May 1, 2020.

Authority G.S. 143-215.65; 143-215.66; 143-215.68;
Eff. 2/1/1976;
Amended Eff. 4/1/1993; December 1, 1984; November 1, 1978.

Readopted by North Carolina Register Volume 34, Issue 23, June 1, 2020 effective 5/1/2020.