Code of Massachusetts Regulations
257 CMR - BOARD OF REGISTRATION OF OPERATORS OF WASTEWATER TREATMENT FACILITIES
Title 257 CMR 2.00 - Certification Of Operators Of Wastewater Treatment Facilities
Section 2.15 - Permit for Discharge

Universal Citation: 257 MA Code of Regs 257.2

Current through Register 1531, September 27, 2024

(1) Rating System for Permit Categories.

(a) Unit Operations is defined as any component of a process that could be utilized solely or combined to attain a specific objective. The rating system is based on the number of specified unit operations in a proposed wastewater treatment facility and the total number of points assigned to each unit operation.

(b) Type I Facility -any facility that has less than three unit operations as listed and has a rating of < 20 points.

(c) Type II Facility -any facility that has three or more unit operations as listed or has a rating of > 20 points.

(2) The following is the list of unit operations commonly used in wastewater treatment systems.

Absorption/Adsorption

- Carbon

5

- Ion Exchange

5

Biological Wastewater Treatment

- Activated Sludge

6

- Contact beds (anaerobic)

5

- RBC

5

- Sand Filters

4

- Trickling Filters

4

Chemical Precipitation (reaction vessel) Clarification

- Primary

5

- Secondary

5

- Tertiary

5

Chrome Reduction

5

Cooling water (contact and non-contact)

2

Cyanide Destruction

5

Dentention basins, Swales, Infiltration trenches

2

Disinfection

5

Equalization

2

Evaporation

- Single

2

- Multiple

5

Filtration/Sludge Dewatering

- Cartridge

3

- Centrifuge

8

- Filter Press

8

- Membrane

5

- Vacuum Filter

10

Flocculation/Mixing/Coagulation

5

Flotation

5

Neutralization/pH Adjust

- Single

3

- Multiple

5

Oil/Water Separation

- Gravity fed

2

- Baffled

5

Pumping (in-plant)

3

Settling

- With manual sludge removal

3

- With mechanical sludge removal

5

Sludge Blending/Thickening

5

Sludge Drying (mechanical dryers)

5

Silver Recovery Unit

5

Stripping (Air/Steam)

5

Disclaimer: These regulations may not be the most recent version. Massachusetts may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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