Definitions All Grades Flashcards
Definitions All Grades
CFR?
Code of Federal Regulations (CFR)
A codification of federal rules published annually by the Office of the Federal Register National Archives and Records Administration. Title 40 of the CFR contains the regulations for “Protection of the Environment.”
AHL
Allowable Headworks Loading
BAT
Best Available Technology Economically Achievable
BMP
Best Management Practice (BMP) [40 CFR 403.3(e)]
A schedule of activities, prohibition of practices, maintenance procedures, and other management practices to implement the prohibitions listed in 40 CFR 403.5(a)(1) and (b). BMPs also include treatment requirements, operating procedures, and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw materials storage.
BOD
An indirect measure of the concentration of biologically degradable material present in organic wastes. It reflects the amount of oxygen consumed in 5 days by biological processes breaking down organic waste.
CIU
Categorical Industrial User (CIU)
An industrial user subject to national categorical pretreatment standards.
CSO
Combined Sewer Overflow
CWA
Clean Water Act
CWF
Combined Wastestream Formula
EPA
Environmental Protection Agency
ERG
Enforcement Response Guide
ERP
Enforcement Response Plan
FOG
Fats, Oils, and Grease
IU
Industrial User
IWS
Industrial Waste Survey (IWS)
The process of identifying and locating IUs and characterizing their industrial discharge.
MAHL
Maximum Allowable Headworks LoadingMaximum Allowable Headworks Loading (MAHL)
The estimated maximum loading of a pollutant that can be received at a POTW’s headworks without causing pass through or interference. The most protective (lowest) of the allowable headworks loadings (see definition) estimated for a pollutant.
Maximum Allowable Industrial Loading (MAIL)
The estimated maximum loading of a pollutant that can be received at a POTW’s headworks from all permitted IUs and other controlled sources without causing pass through or interference. The MAIL is usually calculated by applying a safety factor to the MAHL and discounting for uncontrolled sources, hauled waste, and growth allowance.
MGD
Million Gallons per Day
NAICS
North American Industry Classification System
NOV
Notice of Violation
NPDES
National Pollutant Discharge Elimination System (NPDES)
The national program for issuing, modifying, revoking, and reissuing, terminating, monitoring, and enforcing discharge permits from point sources to waters of the United States, and imposing and enforcing pretreatment requirements, under CWA sections 307, 402, 318, and 405.
NSCIU
Nonsignificant Categorical Industrial User
P2
Pollution Prevention
POTW
Publicly Owned Treatment Works
PSES
Pretreatment Standards for Existing Sources
PSNS
Pretreatment Standards for New Sources
RCRA
Resource Conservation and Recovery Act
SIC
Standard Industrial Classification
SIU
Significant Industrial User (SIU) [40 CFR 403.3(v)]
(1) All users subject to categorical pretreatment standards under 40 CFR 403.6 and 40 CFR chapter I, subchapter N, except those designated as NSCIUs (see definition above);
and (2) any other IU that discharges an average of 25,000 gpd or more of process wastewater to the POTW (excluding sanitary, noncontact cooling, and boiler blowdown wastewater); contributes a process wastestream that makes up 5 percent or more of the average dry-weather hydraulic or organic capacity of the POTW treatment plant;
or is designated as such by the POTW on the basis that the IU has a reasonable potential for adversely affecting the POTW’s operation or for violating any pretreatment standard or requirement [in accordance with 40 CFR 403.8(f)(6)].
SNC
Significant Noncompliance
SUO
Sewer Use Ordinance (SUO)
A legal mechanism implemented by a local government entity that establishes requirements for the discharge of pollutants into a POTW.
TRC
Technical Review Criteria
TSS
Total Suspended Solids
TTO
Total Toxic Organics
Act or “the act” [40 CFR 403.3(b)]
The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended, Title 33 of the United States Code (U.S.C.), sections 1251 et seq.
Allowable Headworks Loading (AHL)
The estimated maximum loading of a pollutant that can be received at a POTW’s headworks and not cause a POTW to violate a particular treatment plant or environmental criterion. AHLs are developed to prevent interference or pass through.