|
|
Class V Injection Well Types
MINERAL and FOSSIL FUEL RECOVERY RELATED WELLS
Well Code
|
Name of Well Type and Description
| | 5X13 | Mining, Sand or Other backfill wells- used to inject a mixture of water and sand,
mill tailings, and other solids into mined out portions of subsurface mines,
whether what is injected is a radioactive waste or not. Also includes special wells
used to control mines fires and acid drainage wells.
| | 5X14 | Solution Mining Wells - used for
in-situ solution mining in conventional mines, such as stopes leaching.
| | 5X15 | In-situ Fossil Fuel Recovery Wells - used for in-situ recovery of coal, lignite, oil
shale, and tar sands.
| | 5X16 | Spent-Brine Return Flow Wells - used to reinject spent brine into the same
formation from which it was withdrawn after extraction of halogens or their salts. |
INDUSTRIAL/COMMERCIAL/UTILITY DISPOSAL WELLS
Well Code
|
Name of Well Type and Description
| | 5A19 | Cooling Water Return Flow Wells - used to inject water which was used in a
cooling process, both open and closed loop processes.
| | 5W20 | Industrial Process Waste and Waste Disposal Wells - used to dispose of a wide
variety of wastes and wastewaters from industrial, commercial, or utility processes. Industries include refineries, chemical plants, smelters, pharmaceutical
plants, Laundromats and dry cleaners, tanneries, carwashes, laboratories, etc.
Industry and waste stream must be specified (e.g. Petroleum Storage Facility -
storage tank condensation water; Electric Power Generation Plant - mixed waste
stream of laboratory drainage, fireside water, and boiler blowdown; Car Wash -
mixed waste stream of detergent, oil and grease and paved area washdown; Electroplating Industry - spent solvent wastes; etc.).
| |
5X28 | Automobile Service Station Disposal Wells - repair bay drains connected to a
disposal well. Suspected of disposal of dangerous or toxic wastes. Note: New wells of this type
were banned effective April 5, 2000.
|
OIL FIELD PRODUCTION WASTE DISPOSAL WELLS
Well Code
|
Name of Well Type and Description
|
| 5X17 | Air Scrubber Waste Disposal Wells - inject wastes from air scrubbers used to
remove sulfur from crude oil which is burned in steam generation for thermal oil
recovery projects. (If injection is used directly for enhanced recovery and not just
disposal it is a Class II well.)
| | 5X18 | Water Softener Regeneration Brine Disposal Wells - inject regeneration wastes
from water softeners which are used to improve the quality of brines used for
enhanced recovery. (If injection is used directly for enhanced recovery and not
just disposal it is a Class II well.)
|
MISCELLANEOUS WELLS
Well Code
|
Name of Well Type and Description
|
|
5X24 | Radioactive Waste Disposal Wells - all radioactive waste disposal wells other
than Class IV wells.
| |
5X25 | Experimental Technology Wells - wells used in experimental or unproven
technologies such as pilot scale in-situ solution mining wells in previously
unmined areas.
| |
5X26 | Aquifer Remediation Related Wells - wells used to prevent, control, or remediate
aquifer pollution, including but not limited to Superfund sites.
| |
5X29 | Abandoned Drinking Water Wells - used for disposal of waste.
| |
5X27 | Other Wells - any other unspecified Class V wells.
Well type and purpose, and a
description of the injected fluids must be specified.
|
DRAINAGE WELLS (a.k.a. DRY WELLS)
Well Code
|
Name of Well Type and Description
|
|
5F1 | Agricultural Drainage Wells - receive irrigation tailwaters, other field drainage,
animal yard, feedlot or dairy runoff, etc.
|
|
5D2 | Storm Water Drainage Wells - receive storm water runoff from paved areas,
including parking lots, streets, residential subdivisions, building roofs, highways,
etc.
|
|
5D3 | Improved Sinkholes - receive storm water from developments located in karst
topographic areas.
|
|
5D4 | Industrial Drainage Wells - wells located in industrial areas which primarily
receive storm water runoff but are susceptible to spills, leaks, or other chemical
discharges.
|
|
5G30 | Special Drainage Wells - used for disposing water from sources other than direct
precipitation. Four types were reported: Landslide control drainage wells (Montana), Potable water tank overflow drainage wells (Idaho), Swimming pool
drainage wells (Florida), and Lake level control drainage wells (Florida).
|
GEOTHERMAL REINJECTION WELLS
Well Code
|
Name of Well Type and Description
|
|
5A5 | Electric Power Reinjection Wells - reinject geothermal fluids used to generate
electric power - deep wells.
|
| 5A6 | Direct Heat Reinjection Wells - reinject geothermal fluids used to provide heat for
large buildings or developments - deep wells.
|
| 5A7 | Heat Pump/Air Conditioning Return Flow Wells - reinject groundwater used to
heat or cool a building in a heat pump system - shallow wells.
|
| 5A8 | Groundwater Aquaculture Return Flow Wells - reinject groundwater or
geothermal fluids used to support aquaculture. Non-geothermal aquaculture disposal wells are also included in this category (e.g. Marine aquariums in Hawaii
use relatively cool sea water).
|
DOMESTIC WASTEWATER DISPOSAL WELLS
Well Code
|
Name of Well Type and Description
|
| 5W9 | Untreated Sewage Waste Disposal Wells - receive raw sewage wastes from
pumping trucks or other vehicles which collect such wastes from single or multiple sources. (No treatment)
|
| 5W10 | Cesspools - including multiple dwelling, community, or regional cesspools, or
other devices that receive wastes and which must have an open bottom and sometimes have perforated sides. Must serve greater than 20 persons per day if
receiving solely sanitary wastes. (Settling of solids)
|
| 5W11 | Septic Systems (Undifferentiated Disposal Method) - used to inject the waste or
effluent from multiple dwelling, business establishments, community, or regional
business establishments septic tank. Must serve greater than 20 persons per day if
receiving solely sanitary wastes. (Primary treatment)
|
| 5W31 | Septic System (Well Disposal Method) - examples of wells include actual wells,
seepage pits, cavitettes, etc. The largest surface dimension is less than or equal to
the depth dimension. Must serve greater than 20 persons per day if receiving
solely sanitary waste. (Less treatment per square area than 5W32)
|
| 5W32 | Septic System (Drainfield Disposal Method) - examples of drainfields include
drain or tile lines, and trenches. Must serve more than 20 persons per day if
receiving solely sanitary wastes. (More treatment per square area than 5W31)
|
| 5W12 | Domestic Wastewater Treatment Plant Effluent Disposal Wells - dispose of
treated sewage or domestic effluent from small package plants up to large municipal treatment plants. (Secondary or further treatment)
|
RECHARGE WELLS
Well Code
|
Name of Well Type and Description
|
| 5R21 | Aquifer Recharge Wells - used to recharge depleted aquifers and may inject fluids
from a variety of sources such as lakes, streams, domestic wastewater treatment
plants, other aquifers, etc.
|
| 5R22 | Saline Water Intrusion Barrier Wells - used to inject water into fresh water
aquifers to prevent intrusion of salt water into fresh water aquifers.
|
| 5R23 | Subsidence Control Wells - used to inject fluids into a non-oil or gas producing
zone to reduce or eliminate subsidence associated with overdraft of fresh water
and not used for the purpose of oil or natural gas production.
|
|
