Wyoming Administrative Code
Agency 020 - Environmental Quality, Dept. of
Sub-Agency 0011 - Water Quality
Chapter 15 - USE OF SURFACE DISPOSAL OF BIOSOLIDS, APP. A-C
Part A - GENERAL PROVISIONS
Section 3 - General definitions

(a) "Apply biosolids or biosolids applied to the land" means land application of biosolids.

(b) "Base flood" is a flood that has a one percent (1%) chance of occurring in any given year (i.e., a flood with a magnitude equaled once in 100 years).

(c) "Biosolids" are solid, semi-solid, or liquid residue generated during the treatment of domestic sewage in a treatment works. Biosolids include, but are not limited to, domestic septage; scum or solids removed in primary, secondary, or advanced wastewater treatment processes; and a material derived from biosolids. Biosolids do not include ash generated during the firing of biosolids in a biosolids incinerator or grit and screenings generated during preliminary treatment of domestic sewage in a treatment works.

(d) "Biosolids management facility" is any treatment works, land application system or person who prepares or applies biosolids to the land and the owner/operator of a surface disposal site.

(e) "Cover crop" is a small grain crop, such as oats, wheat, or barley, not grown for harvest.

(f) "CWA" means the Clean Water Act , 333 U.S.C. 1251 et seq.

(g) "Domestic septage" is either liquid or solid material removed from a septic tank, cesspool, portable toilet, Type III marine sanitation device, or similar treatment works that receives only domestic sewage. Domestic septage does not include liquid or solid material removed from a septic tank, cesspool, or similar treatment works that receives either commercial wastewater or industrial wastewater and does not include grease removed from a grease trap at a restaurant.

(h) "Domestic sewage" is waste and wastewater from humans or household operations that is discharged to or otherwise enters a treatment works.

(i) "Dry weight basis" means calculated on the basis of having been dried at 105 degrees Celsius until reaching a constant mass (i.e., essentially 100 % solids content).

(j) "EPA" means the United States Environmental Protection Agency.

(k) "Feed crops" are crops produced primarily for consumption by animals.

(l) "Fiber crops" are crops, such as flax and cotton, that are not produced for consumption.

(m) "Food crops" are crops consumed by humans. These include, but are not limited to, fruits, vegetables, and tobacco.

(n) "Ground water" is subsurface water that fills available openings in rock or soil material such that they may be considered water saturated under hydrostatic pressure.

(o) "Industrial wastewater" is wastewater generated in a commercial or industrial process.

(p) "Municipality" means a city, town, borough, county, parish, district, association, or other public body (including an intermunicipal agency of two or more of the foregoing entities) created by or under state law; or a designated and approved management agency under section 208 of the CWA, as amended. The definition includes a special district created under state law, such as a water district, sewer district, sanitary district, utility district, drainage district, or similar entity, or an integrated waste management facility as defined in section 201(e) of the CWA, as amended, that has as one of its principal responsibilities the treatment, transport, use, or surface disposal of biosolids.

(q) "Permitting authority" is the EPA and/or the Department of Environmental Quality, Water Quality Division.

(r) "Person who prepares biosolids" is either the person who generates biosolids during the treatment of domestic sewage in a treatment works or the person who derives a material from biosolids.

(s) "Place biosolids or biosolids placed" means disposal of biosolids on a surface disposal site.

(t) "Pollutant" is an organic substance, an inorganic substance, a combination of organic and inorganic substances, or a pathogenic organism that, after discharge and upon exposure, inges-tion, inhalation, or assimilation into an organism either directly from the environment or indirectly by ingestion through the food chain, could, on the basis of information available to the administrator of EPA, cause death, disease, behavioral abnormalities, cancer, genetic mutations, physiological malfunctions (including malfunction in reproduction), or physical deformations in either organisms or offspring of the organisms.

(u) "Pollutant limit" is a numerical value that describes the amount of a pollutant allowed per unit amount of biosolids (e. g., milligrams per kilogram of total solids); the amount of a pollutant that can be applied to a unit area of land (e. g., kilograms per hectare); or the volume of a material that can be applied to a unit area of land (e.g., gallons per acre).

(v) "Runoff" is rainwater, leachate, or other liquid that drains overland on any part of a land surface and runs off of the land surface.

(w) "Store or storage of biosolids" is the placement of biosolids on land on which the biosolids remains for two years or less. This does not include the placement of biosolids on land for treatment.

(x) "Treat or treatment of biosolids" is the preparation of biosolids for final use or disposal. This includes, but is not limited to, thickening, stabilization, and dewatering of biosolids. This does not include storage of biosolids.

(y) "Treatment works" is either a federally owned, publicly owned, or privately owned device or system used to treat (including recycle and reclaim) either domestic sewage or a combination of domestic sewage and industrial waste of a liquid nature. This definition is applicable to this chapter only and has a more limited application than the same term as defined in W.S. W.S. W.S. 35-11-103(c) (iv).