15A NCAC 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 which 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 these tables 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 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 it is demonstrated to the satisfaction of the Director that 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 adequately monitor constituents of the waste discharge and their effect upon the receiving waters.  This monitoring may include, but not be limited to weekends and holidays as deemed necessary by the Director 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 the number and location of sampling points and the frequency with which tests and measurements must be made for such pollutant or pollutant effects as it shall deem necessary to properly monitor the quantity or quality of waste discharges resulting from any activity subject to this Section which is not included in the major SIC groups set forth in this Rule and to properly monitor 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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

Continuous

Continuous

Continuous

 

 

 

during

during

during

during

 

 

 

discharge

discharge

discharge

discharge

 

 

 


WATER SUPPLY PLANTS

MINIMUM REQUIREMENTS FOR SIC 4941

EFFLUENT LIMITED

 

 

REQUIRED TEST

LOCATION

FREQUENCY

 

 

 

CLASS

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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

E,I

2/month

Weekly

3/week

Daily

7.

TSS

E,I

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

CLASS

CLASS

CLASS

 

 

 

I

II

III

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 will be defined by permit.  Toxicity limits will 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, in the opinion of the Director, such discharge may impair the best use of the receiving water by the discharge of toxic substances in toxic amounts.

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

 

History Note:        Authority G.S. 143‑215.65; 143‑215.66; 143‑215.68;

Eff. February 1, 1976;

Amended Eff. April 1, 1993; December 1, 1984; November 1, 1978.