D.C. Mun. Regs. tit. 21, § 1599
1599.1 When used in this chapter, the following words and phrases shall have the meanings ascribed:
Act - The District of Columbia Wastewater System Regulation Act of 1985, D.C. Law 6-95, D.C. Code § 6-951 et seq.
Analytical Testing - all methods of sample collection, preservation, and analysis as prescribed in 40 CFR 136, "Guidelines Establishing Tests Procedures for the Analysis of Pollutants Under the Clean Water Act."
Biochemical Oxygen Demand (BOD) - oxygen utilized in the biochemical oxidation of organic matter in five (5) days at twenty degrees Celsius (20°C.), expressed in milligrams per liter (mg/l) as determined by the methods of Analytical Testing.
Blue Plains - The District of Columbia's Blue Plains Wastewater Treatment Plant
Chemical Oxygen Demand (COD) - the oxygen equivalent of that portion of the organic matter that is susceptible to oxidation by a strong chemical oxidant. The values shall be as determined by the methods of Analytical Testing.
Clean Water Act - Pub.L. 95-217, 33 U.S.C. §1251 et seq. (1976).
Combined Sewer - a sewer which is intended by the District to serve as both a storm sewer and sanitary sewer.
Compatible Pollutants - biochemical oxygen demand, suspended solids, pH, and fecal coliform bacteria, plus additional pollutants identified by WASA if the wastewater treatment plant in fact removes such additional pollutants to a substantial degree. The term "substantial degree" is not subject to precise definition, but generally contemplates removals in the order of eighty percent (80%) or greater. Minor incidentals removals in the order of ten to thirty percent (10% to 30%) are not considered substantial. Examples of the additional pollutants which may be considered compatible include the following:
Cooling Water - the wastewaters discharged from any system of heat transfer such as condensation, air conditioning, cooling or refrigeration to which the only pollutant added is heat.
Discharge - any solid, liquid, or gas introduced into the wastewater system.
District - the District of Columbia, a municipal corporation.
EPA - the U.S. Environmental Protection Agency.
Garbage - solid wastes from domestic and commercial preparation, cooking, or dispensing of food, or from the handling, storage, or sale of produce. For purposes of this chapter, "garbage" is not the same as "shredded garbage".
Incompatible Pollutant - any pollutant which is not a "compatible pollutant" as defined in this section.
Interference - the inhibition or disruption of the District's wastewater system, processes or operations which causes or may cause, or contributes to, a violation of any requirement of the District's NPDES permit, or which threatens or may threaten life, property or the environment. "Interference" includes inhibition or prevention of sludge use or disposal in accordance with applicable statutes and regulations.
NPDES Permit - National Pollutant Discharge Elimination System Permit to operate Blue Plains issued by the EPA.
Nuisance - any condition, state or combination of circumstances which injures, or threatens or endangers health, safety or welfare.
pH - the logarithm to the base ten (10) of the reciprocal of the concentration of hydrogen ion in grams per liter (g/l) of solution.
Phosphorus - total phosphorus content in wastewater as determined by the methods of Analytical Testing.
Pretreatment Service Charge - the added costs of handling, treating, and disposing of waters or wastes not covered by the Wastewater System Service Charge.
Residue - the accumulated solids, grease, liquids and scum separated from wastewater during the wastewater treatment process. Also referred to as "sludge and residue".
Sewer - any pipe or conduit for conveying wastewater or drainage water.
Shredded Garbage - garbage that has been shredded to such a degree that all particles will be carried freely under the flow conditions normally prevailing in public sewers, with no particle greater than one-half inch (1/2 in.) in dimension. For purposes of this chapter, "shredded garbage" is not the same as "garbage".
Significant Accidental Discharge - any unintentional or uncontrolled release of pollutant(s) which results in a violation of a permit issued pursuant to this chapter or results in a violation of the NPDES permit issued to operate Blue Plains.
(1) Except as provided for in subparagraph (2) below, a significant industrial user is a non-domestic user that either:
or for causing a threat to wastewater utility personnel.
(2) Upon a finding that an industrial user would be considered a significant industrial user under any one of the tests listed in subsection (1) of this definition, but is not subject to National Categorical Standards and has no reasonable potential for adversely affecting the operations of Blue Plains or for violating any pretreatment standard or requirement, WASA may determine that such industrial user is not a significant industrial user.
Significant Noncompliance - for the purposes of this provision, an industrial user is in significant noncompliance if it violates the terms of a discharge permit and that violation meets one or more of the criteria listed in § 14 of the Act, D.C. Code § 6-963.
Significantly Changed Operation - what constitutes a "significantly changed operation" shall be determined by WASA on a case-by-case basis by reference to such factors as the increase in the level of pollutant(s) discharged, the potential for the discharge of additional pollutants or the potential for accidental or uncontrolled discharges as a result of process modifications, production increases, equipment modifications and the like.
Slug Discharge or Slug Load - any discharge capable of violating the specific prohibited discharge provisions found in § 7 of the Act, D.C. Code § 6-956.
Standard Industrial Classification - the classification and classification numbers of users based on the 1972 Standard Industrial Classification Manual (SIC) by the Office of Manpower and Budget of the United States of America, as it maybe revised, updated, replaced or amended.
Suspended Solids - solids that either float on the surface of, or may be suspended in, water, sewage, or other liquids, and which may be removable by laboratory filtering, with concentrations expressed in milligrams per liter (mg/l). The value shall be as determined by the methods of Analytical Testing as modified to provide a neutral pH.
Termination of Service - includes closing off or removing branch sewer(s), disconnecting water service(s) and removal of water service lines.
Toxic Pollutant - any pollutant which identified as toxic by the EPA or which is designated as toxic by WASA.
User Jurisdictions - include Montgomery County and Prince George's County, Maryland, as represented by the Washington Suburban Sanitary Commission; Fairfax County, Virginia; Loudoun County, Virginia; and Vienna, Virginia.
WASA - the District of Columbia Water and Sewer Authority.
Waste - sewage and any and all other waste substances of human or animal origin, or associated with human habitation, or resulting from any production, storage, manufacturing or processing operation of whatever nature, whether liquid, solid, gaseous or radioactive. This definition includes such wastes placed within containers of whatever nature prior to, and for purposes of, disposal.
Wastewater Treatment System Service Charge - the charge levied against users to recover the costs of rendering wastewater treatment system services.
SOURCE: Final Rulemaking published at 33 DCR 6194, 6202 (October 10, 1986); as amended by Final Rulemaking published at 47 DCR 2948 (April 28, 2000).