Definitions

Act:  The Federal Water Pollution Control Act, also known as amended, 33 U.S.C. 1251, et seq.

BMP:  Best Management Practices- Schedules of activities, prohibitions of practices maintenance procedures, and other techniques to control, prevent or reduce the discharge of pollutants.  BMP’s also include treatment requirements, operating procedures, and practices to control site runoff, spills or leaks, sludge or waste disposal, or drainage from raw material storage areas.

CFR:  Code of Federal Regulations.

CITY:  City of Amarillo, Texas.
Common Plan of Development:  A construction activity that is completed in seprate stages, separate phases, or in combination with other construction activities.  A common plan of development is identified by the documentation for the construction project that identifies the scope of the project, and may include plats, blueprints, marketing plans, contracts, building permits, a public notice or hearing, zoning requests, or other similar documentation.

Construction Site:  Any area disturbed by construction activities including, but not limited to, clearing, grading, deposition of soil, or excavation activities, except areas used for commercial agricultural or commercial horticultural purposes.  Construction Sites are not areas on which routine maintenance is being performed to maintain the original purpose of the facility.

Debris:  The manmade remains of something broken down or destroyed, something discarded, rubbish.

Discharge:  The introduction of treated or untreated Storm Water directly or indirectly into the Municipal Separate Storm Sewer System (MS4), Surface Water In the State, or Waters of the U.S.

Director:  The Director of Utilities or his authorized agent.

Domestic Sewage:  Waterborne human or animal waste and waste from domestic activities, such as washing, bathing and food preparation.

E P A:  The Environmental Protection Agency or any authorized official of such agency, or succeeding agencies.

Excavation:  A cavity formed by cutting digging, scooping, or disturbing naturally occurring soil in any manner.

Facility Wastewater:  For the purposes of TPDES Permits, any wastewater that is generated at ready-mixed concrete plants, concrete products plants, or associated facilities authorized b this permit, but not including domestic sewage.

Fats, Oils, and Greases:  any material recovered as a substance, by the result of the Hexane Extraction Method, including biological and mineral hydrocarbons.

Floatables:  Debris or waste carried on the surface of a storm water flow.

Flow:  The passage of water.

Grading:  To change the terrain or slope of a parcel of land from its original condition.

Illicit Discharge:  Any Industrial, Commercial, or Residential Discharge to the Storm Sewer System, which is not composed entirely of Storm Water except Discharges in      40 CFR 122.26(2)(iv)(B)(1).

Inland Water:  All surface water in the state other than those defined as tidal water

Interference:  A disruption of Flow, the natural treatment process, or operation of the system, which contributes to a violation of any requirements of the City’s TPDES Permit.

MS4:  Municipal Separate Storm Sewer System.  The Storm Sewer System owned and operated by the City and designed or used for collecting and conveying storm water.

N E C:  No Exposure Certification – A written submission to the executive director from an applicant notifying their intent to obtain a conditional exclusion from permit requirements by certifying that there is no exposure of industrial materials or activities to precipitation or runoff.

N O I:  Notice of Intent to be covered under the TPDES storm water permits.

N O C:  Notice of change to relevant facts contained in a TPDES storm water permit.

N O T:  Notice of Termination to terminate coverage under a TPDES storm water permit.

Operator:  The person or persons associated with a large or small construction activity that meets either of the following two criteria:

  1. The person or persons have operational control over construction plans and specifications to the extent necessary to meet the requirements and condition of the construction General Permit; or
  1. The person or persons have day-to-day operational control of those activities at a construction site which are necessary to ensure compliance with a storm water pollution prevention plan for the site or other permit conditions (e.g. they are authorized to direct workers at a site to carry out activities required by the Storm Water Pollution Prevention Plan or comply with other permit conditions.)
    Outfall:  For the purpose of TPDES Permits, a point source at the point where storm water runoff associated with industrial activity discharges to surface water in the state, and does not include open conveyances connecting two municipal separate storm sewers, or pipes, tunnels, or other conveyances that connect segments of the same stream or other waters of the U.S. and are used to convey waters of the U.S.
    P H :  The logarithm (base 10) of the reciprocal of the concentration of hydrogen ions.

 Point Source:  Any discernible, confined, and discrete conveyance, including but not limited to, any pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock concentrated animal feeding operation, landfill leachate collection system, vessel or other floating craft from which pollutants are, or may be, discharged.  This term does not include return flows form irrigated agriculture or agricultural storm water runoff.

Pollutant:  Dredged spoil, solid waste, incinerator residue, filter backwash, sewage, garbage, sewage sludge, munitions, chemical wastes, biological materials, radioactive materials, heat, wrecked or discarded equipment, rock, sand, cellar dirt, and industrial, municipal, and agricultural waste discharged into water.

Pollution:  The manmade, or man induced alteration, through the introduction of a pollutant of the chemical, physical, biological, or radiological integrity of water.

Redi Mixed concrete plants:  Facilities, including temporary concrete batch plants, primarily engaged in mixing and delivering ready-mixed concrete as classified by SIC Coe 3273

Reportable Quantity Spill:  A discharge or spill of oil, petroleum product, used oil, hazardous substances, industrial solid waste, or other substances into the environment in a quantity equal to or greater than the reportable quantity listed in 30 TAC 327.4 (relating to Reportable Quantities) in any 24-hour period.

Runoff:  Any precipitation, discharge, or flow into the Storm Sewer System.

Runoff Coefficient:  The fraction of the total rainfall that will appear at the conveyance as runoff.

Storm Resistant Shelter:  Includes Completely roofed and walled buildings or structures, and structures with only a top cover but no side coverings, provided material under the structure is not subject to any run-on and subsequent runoff of storm water.

Storm Sewer System:  A pipe, conduit, or conveyance, natural or manmade, including but not limited to streets, gutters, ditches, and channels, for carrying Storm Water.

Storm Water:  Storm water runoff, snow-melt runoff, and surface runoff and drainage.

Storm Water Discharge Permit:  A permit, which shall state the point or points of discharge, water quality, monitoring requirements, and rates of discharge.  The permit shall require a storm Water Pollution Prevention Plan.

Storm Water Pollution Prevention Plan (SWP3 or SWPPP):  A plan to discharge storm water which describes and ensures the implementation of practices that are to be used to reduce the pollutants in storm water discharges.

Structural Control:  Physical, constructed features, such as silt fencing, sediment traps, and detention / retention ponds, that prevent or reduce the discharge of pollutants.

Surface Water In the State:  Lakes, bays, ponds, impounding reservoirs, springs, rivers, streams, creeks, estuaries, wetlands, marshes, inlets, canals, the Gulf of Mexico inside the territorial limits of the state (from the mean high water mark (MHWM) out 10.36 miles into the Gulf), and all other bodies of surface water, natural or artificial, inland or coastal, fresh or salt, navigable or nonnavigable, and including the beds and banks of all water-courses and bodies of surface water, that are wholly or partially inside or bordering the state or subject to the jurisdiction of the state; except that waters in treatment systems which are authorized by state or federal law, regulation, or permit, and which are created for the purpose of waste treatment are not considered to be water in the state.

TCEQ:  Texas Commission on Environmental Quality or any authorized official of such agency or any succeeding agencies. 

Temporary Stabilization:  A condition where exposed soils or disturbed areas are provided a protective cover, which may include temporary seeding, geotextiles, mulches, and other techniques to reduce or eliminate erosion until either final stabilization can be achieved or until further construction activities take place.

T P D E S:  Texas Pollutant Discharge Elimination System.  The state program for issuing, amending, terminating, monitoring, and enforcing permits, and imposing and enforcing pretreatment requirements, under the Clean water Act 307, 402, 318, and 405, The Texas Water Code, and Texas Administrative Code regulations.

Toxic Pollutant:  Any pollutant or combination of pollutants listed as toxic in regulations promulgated by the Environmental Protection Agency under the provisions of the Clean Water Act 397 (a) or other acts.

User:  Any person or entity, which contributes causes or permits the contribution of water into the City’s Municipal Separate Storm Sewer System.

Wastes:  Anything left over, not needed, or superfluous, as an excess material or byproduct of a process.

Wastewater:  The liquid and water carried industrial or domestic wastes from dwellings, commercial buildings, industrial facilities, and institutions, whether treated or untreated