Appendix C - SUBCLASSES OF CLASS V FACILITIES
Current through April 27, 2019
| SUBCLASS | DESCRIPTION |
| HEATING AND COOLING FACILITIES | |
| 5A1 | Direct Heat Reinjection Facilities - Reinject geothermal fluids used to provide direct heat for large buildings, developments or aquiculture facilities |
| 5A2 | Heat Pump/Air Conditioner Return Flow Facilities - Reinject groundwater used to heat or cool a building in a ground based heat pump system, or used to inject heat only using a closed loop heat pump system |
| 5A3 | Cooling Water Return Flow Facilities - Receive non-contact cooling water from industrial processes, both open and closed loop processes |
| BENEFICIAL USE INJECTION FACILITIES | |
| 5B1 | Mining, Sand or Backfill Facilities - Used to inject a fluid mixture of sand, cement, fly ash used as a pozzalin, or mill tailings into mined out portions of underground mines |
| 5B2 | Aquifer Recharge Facilities - Receive water specifically for storage of water underground Must be coupled with the ability to withdraw stored water at a later date for beneficial use Coal bed methane operators cannot dispose of their produced water in class 5B2 injection wells after the effective date of these rules |
| 5B3 | Saline Water Intrusion Barrier Facilities - Receive fresh water to prevent the continued migration of saline water into a fresh water aquifer Includes projects installed to control contaminant plumes by injection of clean water |
| 5B4 | Subsidence Control Facilities - Receive fresh water for the purpose of controlling subsidence caused by an overdraft of water, oil or natural gas |
| 5B5 | Facilities which inject fluids and are used to prevent, control or remediate aquifer pollution, which are not owned or controlled by the Department of Environmental Quality All 5B5 facilities are covered under Article 16 of the Environmental Quality Act |
| 5B6 | Department Controlled Facilities - Facilities which inject fluids and are used to prevent, control or remediate pollution, remediate subsiding mine sites, or produce other beneficial results which are owned or controlled by the Department of Environmental Quality These facilities include but are not limited to, facilities under the supervision of Water Quality Division's Underground Storage Tank Program, facilities under the control and direction of the Abandoned Mined Lands Program, and facilities under the supervision of the Solid and Hazardous Waste Management Division Control may be exercised through ownership, operation, or by administrative orders, stipulated settlements, consent decrees or other legal methods which result in control of a facility by the department |
| 5B7 | Air sparging facilities - Facilities used to inject only air for the purpose of either encouraging microbial breakdown of hydrocarbons or removing of volatile chemicals by vapor extraction |
| COMMERCIAL AND INDUSTRIAL FACILITIES | |
| 5C1 | Air Scrubber Waste Disposal Facilities - Inject wastes from air scrubbers used to remove sulphur, fly ash, or other contaminants |
| 5C2 | Water Treatment Brine Disposal Facilities - Receive brine from water softening or other water treatment |
| 5C3 | Industrial Process Water and Waste Disposal Facilities -Receive wastes generated by industrial and commercial processes. Examples include but are not limited to wastes from car washing, taxidermy, metal plating, printing, silk screening, refining, slaughter houses, and chemical manufacturing companies |
| 5C4 | Automotive Waste Disposal Facilities - Inject waste from floor drains or sinks where repair work is done on machinery of any description |
| 5C5 | Coal Bed Methane Injection Facilities - Inject groundwater produced in the process of coal bed methane extraction into a receiving aquifer containing water of the same or lower class of use |
| 5C6 | Small Commercial Disposal Systems - Inject wastewater which is of similar quality to domestic sewage which does not technically meet the definition of domestic sewage, in quantities of less than 2,000 gallons per day |
| DRAINAGE FACILITIES | |
| 5D1 | Agricultural Drainage Facilities - Receive irrigation tailwaters, other field drainage, animal yard, feedlot, or dairy runoff, and other agricultural wastewater |
| 5D2 | Storm Water Drainage Facilities - Receive storm water runoff from paved areas, including parking lots, streets, residential subdivisions, building roofs, highways, etc |
| 5D3 | Improved Sinkholes - Receive storm water runoff from developments located in karst topographic areas |
| 5D4 | Industrial Drainage Facilities - Receive storm runoff from areas susceptible to spills, leaks, and other chemical discharges |
| 5D5 | Special Drainage Facilities - Receive water from sources other than direct precipitation. Examples of this type include landslide control drainage facilities, potable water tank overflow drainage facilities, swimming pool drainage facilities, and lake level control drainage facilities |
| SEWAGE DISPOSAL FACILITIES | |
| 5E1 | Aquaculture Return Flow Facilities - Receive injectate from aquaculture operations |
| 5E2 | Untreated Domestic sewage Disposal Facilities - Receive untreated domestic sewage from single or multiple sources. Does not include subsurface fluid distribution systems with septic tanks ahead of the subsurface fluid distribution system. Includes all cesspools, regardless of capacity |
| 5E3 | Domestic Subsurface Fluid Distribution Systems - Receive more than 2,000 gallons per day of domestic sewage with only primary treatment such as effluent from a septic tank In addition, any facility injecting domestic sewage within any five (5) acres of land is a class 5E3 facility whenever multiple 5E facilities under one owner inject a cumulative maximum peak design flow of more than 2,000 gallons per day of domestic sewage |
| 5E4 | Domestic Wastewater Treatment Plant Disposal Facilities -Dispose of treated domestic waste after treatment to at least secondary treatment standards |
| 5E5 | Small Domestic Subsurface Fluid Distribution Systems -Receive less than 2,000 gallons per day as an average of a typical week, of domestic sewage with only primary treatment in a septic tank. These systems are designed to accept more than 2,000 gallons per day at a peak and are not small wastewater systems. No class 5E5 system has a required design capacity in excess of 5,000 gallons per day |
| MISCELLANEOUS CLASS V FACILITIES | |
| 5F1 | Cathodic Protection Facilities -Facilities constructed with coke breeze and dust control oil for use as a permanent anode in a cathodic protection system for a fluid conveyor system or fluid containment system composed of metallic material |
| 5F2 | All other facilities that inject fluids into or above an underground source of drinking water which do not fall into Classes I, II, III, or IV injection facilities |
Adopted, Eff. 9/15/2015.
Amended, Eff. 12/3/2018.