Local Limits, Definitions

This document contains definitions for words and phrases used in the UC Davis Local Limits Sewer Disposal Policy. The following definitions shall apply for the words and phrases shown unless it is apparent from the context that they have a different meaning.

APPROVED ANALYTICAL METHODS shall mean the sampling referred to in 40 CFR Part 403, Appendix E and analysis of these samples performed in accordance with the techniques prescribed in 40 CFR Part 136 and amendments thereto. Where 40 CFR Part 136 does not contain sampling or analytical techniques for the pollutant in question, or where the EPA determines that the Part 136 sampling and analytical techniques are inappropriate for the pollutant in question, sampling and analysis shall be performed using other applicable sampling and analytical procedures approved by the University and the EPA.

APPROVAL AUTHORITY shall mean the State of California Water Resources Control Board and/or the California Regional Water Quality Control Board, Central Valley Region.

AVERAGE DAILY FLOW shall mean the arithmetic average value for the number of gallons of wastewater discharged into the sewer system during a 24-hour period.

BIOCHEMICAL OXYGEN DEMAND (BOD) shall mean the quantity of dissolved oxygen required to biochemically oxidize the organic matter in a wastewater sample in five (5) days at 20 degrees Celsius expressed in terms of milligrams per liter (mg/l) and analyzed in accordance with Approved Analytical Methods.

COMPATIBLE POLLUTANT shall mean BOD, suspended solids, pH, coliform bacteria, and such additional pollutants as are now or may be in the future specified and controlled by the University's NPDES permit, for its wastewater treatment works as said works have been designed and are operated to reduce or remove such pollutants.

CONSTITUENT shall means any physical, chemical, or microbiological component or parameter of water or wastewater which can be quantified using Approved Analytical Methods.

CONVENTIONAL POLLUTANT shall mean any pollutant or combination of pollutants listed as conventional in 40 CFR 401.16.

DISCHARGER shall mean any person who causes or contributes a discharge into the POTW.

DOMESTIC WASTEWATER (DOMESTIC SEWAGE) shall mean water bearing wastes from residences and other premises resulting from personal use of water for ordinary living processes.

EFFLUENT shall mean the liquid outflow from any POTW facility; or the nondomestic wastewater discharged by a User to the POTW.

ENVIRONMENTAL PROTECTION AGENCY (EPA) shall mean the United States Environmental Protection Agency, its administrator, or its authorized representative.

FLOATABLE OIL shall mean oil, fat, or grease in a physical state such that it will effectively separate by gravity from wastewater by treatment in a pretreatment facility.

FOOD PROCESSING FACILITY shall mean a University facility which handles, processes, or prepares foodstuffs intended for human consumption.

GARBAGE shall mean solid wastes from the domestic and commercial preparation, cooking and dispensing of food, and from the handling, storage and sale of food.

GRAVITY SEPARATION INTERCEPTOR shall mean an approved detention chamber designed to remove grease, oil, and solids from wastewater before discharge to the POTW.

HAZARDOUS SUBSTANCE shall mean any substance which is toxic, explosive, corrosive, flammable or an irritant, or which generates pressure through heat or decomposition including, but not limited to, any substance determined to be a toxic or hazardous substance pursuant to Section 307 and 311(b)(2) of the Clean Water Act, 33 USC, Section 1251, et. seq., or its implementing regulations at 40 CFR Section 307 and 311; any substance classified as a hazardous substance pursuant to California Water Code Section 13050(p) and; any imminently hazardous chemical substance subject to regulation under the Toxic Mixtures or Substances Control Act, 15 USC, Section 2601, et seq.

HAZARDOUS WASTE shall mean any hazardous substance which is either the resultant and/or intermediate or final by-product of any process.

HOLDING TANK WASTE shall mean any waste from holding tanks such as vessels, chemical toilets, campers, trailers, septic tanks, and vacuum-pump tank trucks.

INCOMPATIBLE POLLUTANT shall mean any non-treatable waste product including non-biodegradable dissolved solids.

INTERCEPTOR shall mean a gravity separation interceptor.

INTERFERENCE shall mean a discharge which alone or in conjunction with a discharge or discharges from other sources, both:

a) Inhibits or disrupts the POTW, its treatment processes or operations, or its sludge processes, use or disposal; and

b) Causes a violation of any requirement of the POTW's NPDES permit (including an increase in the magnitude or duration of a violation) or of the prevention of sewage sludge use or disposal in compliance with the use or disposal in compliance with the following statutory provisions and regulations or permits issued thereunder (or more stringent State or local regulations): Section 405 of the Clean Water Act, the Solid Waste Disposal Act (SWDA) (including Title II, more commonly referred to as the Resource Conservation and Recovery Act (RCRA), and including State regulations contained in any State sludge management plan prepared pursuant to Subtitle D of the SWDA), the Clean Air Act, the Toxic Substances Control Act, and the Marine Protection, Research and Sanctuaries Act.

LOWER EXPLOSIVE LIMIT (LEL) shall mean the minimum concentration of a combustible gas or vapor in the air which will ignite if an ignition source is present.

MAINTENANCE shall mean keeping the sewer lines, sewer systems, sewer facilities or sewage works and structures in satisfactory working condition and good state of repair (including, but not limited, to preventing any obstructions or extraneous materials or flows from entering said facilities, protecting said facilities from any damage, and keeping same free from defects or malfunctions), and making necessary provisions and taking necessary precautions to assure that said sewer facilities are at all times capable of satisfactorily performing the services, and adequately discharging the functions and producing the final results and purposes said facilities are intended to perform, discharge, or produce.

MANAGER shall mean the Assistant Director of Facilities Services-Mechanical of the University or authorized representative, agent, or deputy.

MASS EMISSION RATE shall mean the mass of material discharged to the POTW during a given time interval. Unless otherwise specified, the mass emission rate shall be expressed in pounds per day of a particular constituent or combination of constituents.

MAY is permissive.

MILLIGRAMS PER LITER (mg/l) shall mean a unit of the concentration of water or wastewater constituent. It is 0.001 g of the constituent in 1,000 ml of water. It has replaced the unit formerly used commonly, parts per million, to which it is approximately equivalent in reporting the results of water and wastewater analysis.

NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM PERMIT (NPDES PERMIT) shall mean the permit issued to the POTW by the California Regional Water Quality Control Board, Central Valley Region pursuant to Section 402 of the Act (33 USC 1342).

NONDOMESTIC USER shall mean any User who discharges nondomestic wastewater.

NONDOMESTIC WASTEWATER shall mean all wastewater except domestic wastewater and unpolluted water as defined herein. Nondomestic wastewater shall include, but not be limited to, wastewater resulting from industrial, commercial, producing, manufacturing, processing, institutional, governmental, and agricultural operations, and brine wastewater resulting from the regeneration of water conditioning devices. All liquid wastewater hauled by truck, rail, or another means shall also be considered as nondomestic wastewater, regardless of the original source of the wastes. Hauled domestic wastewater is included in the category of nondomestic wastewater.

OIL AND GREASE shall mean any of the following in part or in combination:

  1. petroleum derived products, e.g., oils, fuels, lubricants, solvents;
  2. vegetable derived products, e.g., oils, shortenings, soluble cutting oils; and 3. animal derived products, e.g., fats, greases, oils, lard.

PASS-THROUGH shall mean any discharge which exits the POTW into waters of the State in quantities or concentrations which, alone or in conjunction with other discharges, causes a violation of any requirement of the POTW's NPDES permit (including an increase in the magnitude or duration of a violation).

PATHOGEN shall mean any bacterial, viral, protozoan or other microbial organism which has the ability to cause human diseases.

PERSON shall mean any individual or University division, department, or entity. The masculine gender shall include the feminine; the singular shall include the plural where indicated by the context.

pH shall mean the logarithm (base 10) of the reciprocal of the concentration of hydrogen ions, as analyzed in accordance with Approved Analytical Methods.

POLLUTANT shall mean any dredged spoil, solid waste, incinerator residue, sewage, garbage, sewage sludge, munitions, chemical wastes, biological materials, radioactive materials, heat, wrecked or discharged equipment, rock, sand, cellar dirt, and industrial, municipal, and agricultural waste discharged into water.

POLLUTION shall mean the adverse alteration of the chemical, physical, biological, and radiological integrity of water caused by people.

POTW TREATMENT PLANT shall mean the portion of the POTW designed to provide treatment to wastewater.

PRETREATMENT OR TREATMENT shall mean the reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater to a less harmful state prior to or in lieu of discharging or otherwise introducing such pollutants into the POTW. The reduction or alteration may be obtained by physical, chemical, or biological processes, process changes, or other means, except as prohibited by 40 CFR 403.6 (d).

PRETREATMENT REQUIREMENT shall mean any substantive or procedural requirement related to pretreatment, other than a Pretreatment Standard, imposed on a User.

PRETREATMENT WASTES shall mean all wastes, liquid or solid, removed from nondomestic wastewater by physical, chemical, or biological means.

PUBLICLY OWNED TREATMENT WORKS (POTW) shall mean treatment works as defined by Section 212 of the Act, (33 USC 1292). This definition includes any devices or systems owned and operated by the University, which are used in the conveyance, storage, treatment, recycling and reclamation of municipal sewage, including sewers, pipes, lift stations, and other facilities which convey wastewater to the wastewater treatment facilities.

RADIOACTIVE MATERIAL shall mean material containing chemical elements that spontaneously change their atomic structure by emitting any particles, rays, or energy forms.

REGIONAL BOARD shall mean the California Regional Water Quality Control Board, Central Valley Region.

REGULATORY AGENCIES shall mean those public agencies legally constituted in the State of California to protect the public health and water quality, such as the U.S. Environmental Protection Agency; the California Environmental Protection Agency; the California Department of Health Services; the State Water Resources Control Board; and the California Regional Water Quality Control Board, Central Valley Region.

RESTAURANT shall mean any retail establishment selling prepared foods and drinks for consumption on the premises.

SANITARY SEWAGE shall mean domestic wastewater.

SANITARY SEWER shall mean a sewer which carries sanitary and industrial wastes, and to which storm, surface, and groundwater are not intentionally admitted.

SEPTAGE shall mean any wastewater or sludge removed from a cesspool, septic tank, holding tank, or chemical toilet, and which is trucked or hauled to the point of discharge.

SEWAGE shall mean wastewater.

SEWER shall mean a pipe or conduit that carries wastewater or drainage water.

SEWERAGE SYSTEM shall mean a network of wastewater collection, conveyance, treatment and disposal facilities interconnected by sewers, and owned by the University.

SHALL is mandatory.

SHREDDED GARBAGE shall mean 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 1/2" (1.25 centimeters) in any dimension.

SOLID WASTE shall mean the non-liquid carried wastes normally considered to be suitable for disposal with refuse at sanitary landfill refuse disposal sites.

STATE shall mean the State of California.

STATE WATER BOARD shall mean the State of California Water Resources Control Board.

STORMWATER shall mean any flow of water resulting from natural precipitation.

STORMWATER SYSTEM shall mean all stormwater conveyance and treatment facilities located within the University, including, but not limited to, storm drains, catch basins, storm drain manholes and manways, and stormwater pumping facilities.

SUSPENDED SOLIDS OR "SUSPENDED MATTER" shall mean the insoluble solid matter suspended in wastewater that is separable by laboratory filtration.

TOXIC AMOUNT shall mean concentration of any pollutant or combination of pollutants which upon exposure to or assimilation into any organism which will cause adverse effects, such as cancer, genetic mutations and physiological manifestations, as defined in standards issued pursuant to Section 307(a) of Public Law 92-500.

TOXIC POLLUTANT shall mean any pollutant or combination of pollutants listed as toxic in 40 CFR 401.15 or 40 CFR 403, Appendix B.

UNCONTAMINATED WATER shall mean unpolluted water.

UNIVERSITY shall mean the University of California, Davis.

UNPOLLUTED WATER shall mean non-contact cooling or heating water, air conditioning condensate, ice melt, condensate, rain water, or uncontaminated groundwater, surface water, or stormwater.

USER shall mean any person who contributes, causes, or permits the contribution of wastewater into the POTW, including Residential and Nonresidential Users.

WASTE shall mean sewage and any and all other waste substances, liquid, solids, gaseous, or radioactive, associated with human habitation, or of human or animal origin, or from any producing, manufacturing or processing operation of whatever nature, including such wastes placed within containers of whatever nature, prior to and for the purpose of disposal.

WASTEWATER shall mean the liquid and water-carried domestic or nondomestic wastes from dwellings, commercial buildings, industrial facilities, and institutions, together with any groundwater, surface water, and stormwater that may be present, whether treated or untreated, which is contributed into or permitted to enter the POTW.

WASTEWATER TREATMENT FACILITIES shall mean the structures, equipment, and processes maintained by the University which accept wastewater from the public sewer and are required to treat and dispose of domestic and nondomestic wastewater.

WASTEWATER TREATMENT PLANT shall mean the POTW Treatment Plant.

WATERS OF THE STATE shall mean all streams, lakes, ponds, marshes, watercourses, waterways, wells, springs, reservoirs, aquifers, irrigation systems, drainage systems, and all other bodies or accumulations of water, surface or underground, natural or artificial, public or private, which are contained within, flow through, or border upon the State or any portion thereof.

WATER SUPPLY shall mean the water supply serving the area tributary to the POTW