Skip to Page Content
Delaware.gov  |  Text OnlyGovernor | General Assembly | Courts | Elected Officials | State Agencies
 Photo: Featured Delaware Photo
 
 
 Phone Numbers Mobile Help Size Print Email

Delaware General AssemblyDelaware RegulationsMonthly Register of RegulationsJanuary 2016

Table of Contents Previous Next

Authenticated PDF Version

7301 Regulations Governing the Construction and Use of Wells
7 Delaware Code, Sections 6003 and 6010
These proposed amendments will align better with other state regulations including the Regulations Governing Public Drinking Water Systems; Regulations Governing the Allocation of Water; Regulations for Licensing Water Well Contractors, Pump Installer Contractors, Well Drillers, Well Drivers, and Pump Installers; Regulations Governing Underground Injection Control; and the Regulations Governing the Design, Installation and Operation of On-site Wastewater Treatment and Disposal Systems.
The hearing record on the proposed changes to the Regulations Governing the Construction and Use of Wells will be open January 1, 2016. Individuals may submit written comments regarding the proposed changes via e-mail to Lisa.Vest@state.de.us or via the USPS to Lisa Vest, Hearing Officer, DNREC, 89 Kings Highway, Dover, DE 19901 (302) 739-9042. A public hearing on the proposed amendment will be held on February 1, 2016 beginning at 6:00 PM in the DNREC Auditorium, located at the Richardson & Robbins Building, 89 Kings Highway, Dover, DE 19901.
The Secretary of the Department of Natural Resources and Environmental Control (Department) establishes and adopts the following Regulations under and pursuant to the authority granted by §§6003 and 6010(a) of Chapter 60 of Title 7 of the Delaware Environmental Protection Act, 7 Del.C. Ch 60 Code.
1.2.1 Minimum requirements are hereby prescribed governing the location, design, installation, use, disinfection, modification, repair, and abandonment sealing of all wells and associated pumping equipment as well as prescribing certain requirements for the protection of public and private potable water supply wells. These Regulations supersede all other well construction Regulations heretofore adopted.
1.2.2 No person shall conduct any activity contrary to the provisions of these Regulations. All such activities which that are contracted for shall be carried out only by those a person or persons having possessing a valid license issued by the Department pursuant to the provisions of 7 Del.C. §6023 and the "Regulations for Licensing Water Well Contractors, Pump Installer Contractors, Well Drillers, Well Drivers and Pump Installers."
1.2.3 These Regulations apply to the entire life of the well, including but not limited to, construction activities from the initial penetration or excavation of the ground surface through development, equipment installation, disinfection and abandonment sealing of the well. Set up of construction equipment before actual penetration or excavation is not considered part of construction activities.
1.2.4 The installation of Before any well construction activities commence to install any well, as defined in Section 2.610 of these Regulations, including any well installed for the purpose of obtaining geologic or hydrologic information the property owner or property owner’s authorized agent must obtain shall receive the prior approval of the Department to construct the well in the form of a well permit.
1.2.6 The DNREC Department shall have the right has the authority to require that the well permit and permit conditions be recorded with the Recorder of Deeds office in the county where the well is located.
1.2.7 These Regulations, being necessary for the protection and conservation of the water resources of the State, shall be liberally construed in order to preserve the land, surface water and ground for the protection and conservation of the water resources of the State of Delaware to protect public heath.
1.2.8 The Department shall have the right to enter at reasonable times upon any private or public property for the purpose of inspecting and investigating conditions relative to the enforcement of these Regulations; upon given verbal notice and after presenting official identification to the permittee, owner, occupant, custodian, or agent of the property owner.
The provisions of these Regulations shall be enforced by the Department as provided in 7 Del.C. Ch. 60 Chapter 60 of Title 7 of the Delaware Code. Such enforcement may include but is not limited to revocation of any the violator’s well permit for cause. The failure of the Department to enforce any of the provisions of this these Regulations shall in one case does not constitute a waiver by the Department of any such provisions or right to enforce such provisions in other cases.
“Abandoned Well” means a well which has been permanently filled or sealed that is not being used for its intended purpose as determined by the Department.
“Absorption Facility” means a system of open jointed or perforated piping, alternative distribution units or other seepage systems for receiving the flow from septic tanks or other treatment facilities and designed to distribute effluent for oxidation and absorption by the soil within the zone of aeration.
“Agricultural Well” means a non-potable well used for the watering of livestock, poultry, aquaculture, uses, or solely for the watering of household yards and gardens, or for other purposes related to farming, in general but not including the irrigation of for irrigating lands or crops. Water is not used for human consumption or to service a dwelling.
“Annular Space (Annulus) means the space between two cylindrical objects, one of which surrounds the other, such as the space between a drill hole and a casing pipe or between two well casings a borehole and well casing or between concentric well casings.
“Applicant” means the owner(s) or owners of the property seeking a well permit, or the his or her legally authorized agent of the owner(s) as evidenced by sufficient written documentation.
“Aquifer” means a part of a formation, a formation, or a group of hydraulically connected formations that contains sufficient saturated permeable material to yield economically useful quantities of water to wells and springs.
“Aquifer Interconnection” means a condition that exists when a well is screened or gravel packed across multiple aquifers.
“Aquifer Storage and Recovery (ASR) Well” means a well that is used for artificial recharge of an aquifer to store water for withdrawal usually during peak demand.
"Aquifer Test" means a test conducted by influencing and observing changes in hydraulic head in an aquifer.
"Available" means a public water distribution line or service connection exists within 200 feet of the foundation of the structure or building.
“Beneficial Use” means any use of water which that is necessary to the applicant, reasonably non-wasteful, reasonably non-damaging to other water users, and in the best interest of the public as determined by the Department.
“Community Water System” means a public water system which serves at least fifteen (15) service connections used by year-round residents or regularly serves at least twenty-five (25) year-round residents.
"Call in Authorization Number" means a randomly generated number provided by the Department to the well drilling contractor, that is linked to the well permit number, that conveys the intent to construct the well, and that is required to validate the well permit.
"Certificate of Public Convenience and Necessity (CPCN)" means an authorization issued by the Delaware Public Service Commission for the delivery or provision of a public service to a designated area or parcel of land.
“Confined Aquifer” means an aquifer a saturated layer of permeable geologic material bounded above and below by impermeable beds or by beds of distinctly lower permeability than that of the aquifer itself and containing ground water which is everywhere at a confining layers and where its water pressure is everywhere greater than atmospheric and from which water in a well will rise to a level above the top of the aquifer.
“Confining Layer” means a body stratum of impermeable or distinctly less permeable material stratigraphically adjacent to one or more aquifers.
“Consolidated” means geologic material that is firm and rigid due to the interlocking or cementation of its mineral components or both.
"Construction Well" means a non-potable temporary well used solely to supply water for well construction.
“Contaminant” means any substance, either man-made or natural, which is concentrated enough to degrade that degrades or impairs water quality to a degree which renders such water harmful to public health and safety, or to the environment.
“Contamination” means the presence of a contaminant in the environment.
“Department” means The Department of Natural Resources and Environmental Control (DNREC).
"Dewatering System" means mechanical equipment used to remove groundwater from an excavation for construction purposes. Equipment consists of a pump, intake and discharge piping, and wells, well points, sumps, or excavations.
“Dewatering Well” means a well that is used to remove ground water groundwater for construction or installation of, but not limited to, footings, sewer lines, building foundations, elevator shafts, etc underground storage tank installations and the like.
“Disinfection” means the inactivation of pathogenic organisms in water by chemical oxidants, or equivalent agents ozone, ultraviolet light, or similar treatments.
“Disposal Area” means the entire area used for underground dispersion of the liquid portion of sewage the absorption facility.
“Domestic Well” means a well primarily that may serve no more than three dwellings and is used for potable non-public water supply purposes and which may be used for non-potable household purposes, excluding heat pump supply.
“Drawdown” means the extent of lowering of the static water level in a well and of the water table or potentiometric surface adjacent to a well, resulting from the discharge of water from a well by pumping or natural flow.
“Drilled Well” means a well that is excavated wholly or in part by means of a drill such as auger (percussion or rotary) which operates by cutting, abrasion or by use of air pressure or a water jet constructed using auger, rotary or percussion tools that cut, fracture, or abrade the surface of the earth.
“Drive Shoe” means a device fastened to the bottom of a length of casing to aid in driving the well casing.
“Driven Well” means a well that is constructed by driving means of pushing or hammering a casing, at the end of which there is a drive point and screen including direct push methods, and that does not create an annular space.
“Dug Well” means a well that is constructed in an excavation created by the use of picks, shovels, or other hand tools, or by means of a power shovel an excavator.
"Fire Protection Well" means a non-potable well used for emergency purposes only and not connected to a public water supply distribution system.
"Geophysical Log" means a record of various properties of the formation, borehole, or well obtained by electrical, mechanical, electromagnetic, or other measuring devices.
“Gravel Pack” means a processed gravel or coarse sand placed opposite a in the annular space surrounding the well screen to limit the entrance of fine particles and improve well yield particulates.
Ground Water Groundwater means any water naturally found under the surface of the earth.
“Grout or Grouting Material (noun) means a stable and impervious bonding material, reasonably free of shrinkage, which that is capable of providing a watertight seal in the annular spaces of a well, or for sealing.
"Grout" (verb) means to emplace grout (noun) in an annular space of a well.
"Heat Pump" means a device that transports thermal energy from one environment to another, and in either direction.
“Heat Pump Closed Loop Well” means a sealed and pressurized loop of pipe borehole containing a heat exchange solution which is circulated below the earth's surface and utilizes groundwater for the purpose of heat transfer vertical pressurized circuit of pipe that circulates a water-based solution to exchange heat with groundwater.
"Heat Pump Direct Exchange (DX) Well" means a borehole containing a pressurized circuit of tubing that circulates a refrigerant to exchange heat with groundwater.
“Heat Pump Recharge Well” means a non-potable well constructed and primarily that is used for injecting ground water source to inject groundwater heat pump effluent back into an aquifer, and which may be used for other non-potable water supply purposes provided prior written approval is obtained from the Department.
“Heat Pump Supply Well” means a well constructed primarily to obtain ground water as a source for used to withdraw groundwater for thermal exchange in a heat pump supply purposes and which and that may also be used for other purposes, including domestic water potable supply, provided prior written approval is obtained from the Department.
“Industrial Well” means a non-potable well which that is used in the processing, washing, packaging, or manufacturing of a product excluding food and beverages.
“Injection Well” means a well that is used to inject place fluid into the subsurface as regulated in by the "Regulations Governing Underground Injection Control."
“Irrigation Well” means a non-potable well which that is used for the watering of lands or crops other than household lawns and gardens.
"Jetted Well" means a well that is constructed using a high velocity stream of water.
"Lysimeter" means a device for withdrawing pore water samples from the unsaturated zone and that does not intersect the water table.
“Miscellaneous Public Well” means a non-potable well which supplies water for potable and other beneficial uses to service stations, stores, small offices, businesses, etc. with less than twenty-five (25) employees; and from which the water is not used in the manufacture or preparation of food or beverages for sale to or use by the public in general used for beneficial purposes but that is not included in any other well categories defined by these Regulations, and that is not connected to a public water system or private home.
“Monitor Well” means a non-potable well installed for the sole purpose of the determination of subsurface conditions and that is used primarily for collecting ground water groundwater samples.
“Multiple Screenings means the placing (in a single well) use of more than one screen in different or separated water-bearing units, or of a continuous screen, in well construction, connecting two or more water-bearing units multiple water-bearing zones within a single aquifer.
“Observation Well” means a non-pumping, non-potable well used for the sole purpose of determining ground water measuring groundwater levels or the potentiometric surface.
"Operator" means the person responsible for the operation of a well or water system.
“Person” means any individual, firm, association, organization, partnership, business trust, corporation, company, contractor, supplier, installer, user, or owner, or any Federal, State or local governmental agency or public district or any officer or employee thereof of these.
"Piedmont Physiographic Province" means the land area consisting of rolling hills composed of crystalline rocks located north of a line drawn between Newark and Wilmington.
“Piezometer” means a small diameter non-pumping well with a short screen that is used to measure elevation of the water table or potentiometric surface an alternate word for observation well.
“Pitless Well Adapter” means a device designed for attachment to one or more openings through a well casing, provided with a pitless well cap, and so constructed as to prevent the entry of contamination into the well. The adapter is used to conduct water to or from the well, protect the water from freezing temperatures and provide access to the well and water system components within the well.
“Pitless Well Cap” means a sanitary device that covers and encloses the upper termination of the well casing above a pitless well adapter or unit and provides for connections for electrical power lines and a screened well vent.
“Pitless Well Unit” means a pre-assembled device which that extends the upper end of a well casing to above grade, provided with a pitless well cap, and so constructed as to prevent the entry of contamination into the well or potable water. The unit is used to conduct water to or from the well, protect the water from freezing temperatures and provide access to the well and to the water system components within the well.
“Potable Water” means any water which that is in compliance with all the primary health related required drinking water standards specified in the Delaware Regulations Governing Public Drinking Water Systems and the US EPA Safe Drinking Water Act, and that is acceptable for human consumption.
“Potential Source of Contamination”: means Aanything that may introduce a contaminants so as to that could cause a violation of water to fail to meet applicable water standards or otherwise interfere with water uses. Examples may include, but are not limited to, underground storage tanks for petroleum products, absorption facilities, wastewater disposal areas, landfills, and confined animal feed lot operations, and storm water management facilities.
“Pressure Grouting” means the emplacement of grout materials under positive pressure by means of a conductor (tremie) pipe.
"Public Water System (PWS)" means a water supply system for the provision to the public of water for human consumption through pipes or other constructed conveyances either directly from the user's free flowing outlet or indirectly by the water being used to manufacture ice, foods and beverages or that supplies water for potable or domestic purposes for consumption in more than three dwelling units, or furnishes water for potable or domestic purposes to employees, tenants, members, guests or the public at large in commercial offices, industrial areas, multiple dwellings or semi-public buildings including, but without limitation, rooming and boarding houses, motels, tourist cabins, mobile home parks, restaurants, hospitals and other institutions, or offers any water for sale for potable domestic purposes. Public water systems are classified as follows:
"Community Water System (CWS)" means a public water system that serves at least 15 service connections used by year round residents or regularly serves at least 25 year-round residents.
"Non-Transient Non-Community Water System (NTNCWS)" means a public water system that is not a community water system and that regularly serves at least 25 of the same persons over six months per year.
"Transient Non-Community Water System (TNCWS)" means a public water system that has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days out of the year.
"Miscellaneous Public Water System (MPWS)" means a public water system that is neither community, transient non-community, nor non-transient non-community.
“Public Well” means a well which that is used to supply water to more than three dwelling units; twenty-five (25) or more employees; in the manufacture of ice, foods, or beverages; to the public in food washing, processing, or preparation in a plant, restaurant, or other facility or for the preparation or manufacturing of food or beverages, or to the public at large.
“Pump Installer” means any person licensed by holding an appropriate license issued by the State of Delaware to act in responsible charge of all on-site work in the installation, modification, and repair of water pumps and related equipment.
“Pump Installer Contractor” means any person licensed by the State of Delaware to engage in the business of contracting for the installation, modification, and repair of water well pumps and related equipment.
“Pump Pit” means a hole or depression in the ground in which the well and external pumping equipment is contained, and which is not protected from freezing an underground enclosure that contains pumping equipment external to the well, and may also contain the well and other water system components.
“Recovery Well” means a well that is used to withdraw contaminants or contaminated ground water groundwater.
“Regulations” mean Delaware Regulations Governing the Construction and Use of Wells.
“Sealing” means removal of pumping equipment, if applicable, and emplacing grout the entire length of a well so as to make it permanently decommissioned.
“Secretary” means the Secretary of the Department of Natural Resources and Environmental Control or his the Secretary’s duly authorized designee.
“Septic Tank” means a watertight receptacle which that receives the discharge of sanitary sewage wastewater from a structure or part of a structure and is designed and constructed so as to permit settling of settleable solids from the liquid, digestion of the organic matter by detention, and discharge of the liquid portion into a disposal area an absorption facility.
“Service Connection” means a water line from a public water supply system to a dwelling or building.
"SIRS" means the Department's Site Investigation and Restoration Section.
“Soil Boring” means an uncased excavation done a borehole for the purpose of determining the physical or chemical characteristics of soil or sediment.
“Source of Contamination” means anything that introduces contaminants so as to cause is known to have introduced a contaminant that has caused a violation of applicable water quality standards or otherwise interfere with water uses. Examples may include but are not limited to underground storage tanks for petroleum products, wastewater disposal areas, landfills, and confined animal feed lot operations and storm water management facilities.
“Static Water Level” means the elevation of water in a well not under the influence of pumping.
“Suction Line” means a pipe which that conveys water from a well to by a pump under vacuum conditions creating negative pressure.
“Temporary Well” means a well used to supply water for well construction.
“Test Well” means a temporary well installed to ascertain determine the lithology and water transmission properties of an aquifer or geologic materials and which that may be used to determine water quality; a well which is not used on a permanent basis.
“Unconfined Aquifer” means an aquifer in which where no relatively impermeable layer exists between the water table and the ground surface and an aquifer in which the water surface is at atmospheric pressure.
“Unconsolidated” means geologic material that is loosely arranged and whose particles are not cemented together as in soil, sediment, or other geologic material.
"Unrecorded Well" means an existing well for which the Department has no record.
“Water Well Contractor” means any person licensed by the State of Delaware to engage in the business of contracting for the construction and repair of wells, and contracting for or the installation or repair of pumping equipment in or for wells, or both well pumps and related equipment.
“Well” means any excavation that is drilled, cored, bored, washed, driven, dug, jetted, or otherwise constructed when the intended use of such excavation is for the location, testing, acquisition, use, for extracting water from, or for the artificial recharge of subsurface fluids, and where the depth is greater than the diameter or width. For the purpose of this regulation this definition does not include geotechnical test; soil, telephone, and construction piling borings; fence posts, test pits, or horizontal closed loop heat pump circulation systems constructed within twenty (20) feet of the ground surface intersects the water table, and is installed for the purpose of obtaining geologic or hydrologic information and for locating, testing, measuring, extracting, or recharging water and other fluids, and where the depth is greater than the width. Such excavations may have been drilled, augured, cored, bored, driven, dug, jetted, or otherwise constructed. This definition does not include excavations for dewatering trenches, utility poles, construction pilings, building foundations, fence posts, test pits, or horizontal heat pump systems.
“Well Casing” means the pipe installed in a well to give unobstructed access to a water-bearing unit, to provide protection during and after installation, or both a closed-wall pipe used to provide access from the ground surface to a water-bearing unit.
"Well Development" means the process of removing fine material from the well to improve yield and water quality.
“Well Driller” means any person licensed by the State of Delaware to act in responsible charge of all on-site work relating to the drilling, construction, development, and testing of wells; well alteration and repair, test boring and coring; and the installation, modification, and repair of well pumps and related equipment.
“Well Driver” means any person licensed by the State of Delaware to act in responsible charge for all on-site work relating to the driving, construction, development, and testing of driven wells; alteration and repair of driven wells; and the installation, modification and repair of water well pumps and related equipment ordinarily used in driven wells.
“Well Pit” means a hole or depression in the ground surface around a well casing in which the an underground enclosure that contains a well head that is capped below grade and which does not contain pumping equipment.
"Well Point" means a shallow well that is typically used series with a manifold and pumped together by suction to dewater an excavation.
“Well Screen” means a structural device which supports the well excavation, allows entrance of sub-surface fluids into a well or exit from a recharge well, and which acts as a filter to keep sediment from entering a well filtering device (e.g. manufactured perforated pipe) used as a sediment filter allowing entrance or exit of sub-surface fluids.
“Wick Drain” means a prefabricated drainage strip which is driven into the ground for the removal of pore water from the soil, therefore consolidating compressible soils. The wick drain design allows for escaping water to follow gravitational forces and to drain downwards or upwards into granular drainage layers or to the ground surface strip that is inserted into the ground for draining water and consolidating compressible soils or sediments.
3.0 General Permitting Requirements And Procedures
3.1.1 A well may not be constructed until the Department has issued a well permit to the applicant, and a call-in authorization number unless otherwise authorized under Ssubsection 3.113 of these Regulations. A well permit is not required for the construction of piezometers with a hand auger or hand operated driver or for the construction of wick drains in the unconfined aquifer hand augured soil borings or other soil borings that do not intersect the water table (such as direct push soil borings).
3.1.23 A well permit is required for the construction and use of all wells and lysimeters.
A well permit is not required if an existing well requires only repair or rehabilitation (the restoration of a well’s original yield, to the best extent possible) and the location and physical dimensions of the well are not changed. A change in physical dimensions, such as deepening, making more shallow, enlarging, or reducing the length or diameter of either the screen or well casing shall require an application for a well permit as set forth in the remainder of this Section. The Department may consider the approval of additional repair procedures on a case-by-case basis for the repair or rehabilitation of a well or associated equipment, provided the physical dimensions of the well are not changed, pursuant to subsection 9.3. A change in physical dimensions or exceedance of original capacity shall require an application for a well permit as set forth in the remainder of this Section.
The construction, repair, modification, or abandonment of wells and the installation of pumps and pumping equipment in and for water wells shall be performed by or under the direct on-site supervision of an individual licensed pursuant to the requirements of 7 Del.C. §6023 and the requirements of the "Regulations for Licensing Water Well Contractors, Pump Installer Contractors, Well Drillers, Well Drivers, and Pump Installers." sealing of wells shall be performed by or under the direct on-site supervision of a licensed well driller or well driver. The installation of well pumps and pumping equipment shall be performed by or under the direct on-site supervision of a licensed pump installer, plumber or well driller. Except as permitted by 7 Del.C. §6023, the above referenced persons shall be licensed under the requirements of the Delaware Regulations for Licensing Water Well Contractors, Pump Installer Contractors, Well Drillers, Well Drivers, and Pump Installers.
All well permit applications shall be prepared and submitted by a water well contractor Delaware licensed well driller or driver pursuant to subsection 3.1.2.
3.5 General Permit Application Procedures
3.5.1 All Aapplications for well permits shall be made on forms provided by the Department provided paper or electronic forms.
3.5.2 All applications shall be legible and complete. An illegible or incomplete application shall be returned to the preparer with a statement of the reason for rejection, including such plans, specifications, and other relevant information for review by the Department. All applications must include evidence of property ownership in the form of a zoning verification, settlement agreement, tax assessor's record, or an easement or access agreement showing the applicant's authority to construct a well, or the authorized agent for government owned lands. In the event an outstanding issue is identified during the Department's review that renders the application incomplete, the Department will return the application to the preparer along with a letter describing what information or material is missing.
3.5.3 All applications shall be signed by the proper applicant or their duly designated legally authorized agent or be attested to by the permit preparer for electronic applications. The applicant may be penalized for submitting false information.
3.5.4 All well applications shall be signed by the permit preparer. as stated in Section 3.4 of these Regulations The permit preparer may be penalized for submitting false information.
3.5.6 Wells shall only be used for their designated use as defined in Section 2 of these Regulations the purposes designated by the permit.
3.5.7 The Department shall will not consider the issuance of a new well permit for a potable water supply well on a previously an undeveloped property parcel until after the on-site wastewater treatment and disposal system construction permit for the property parcel has been issued, or it is demonstrated that central sewer service is available to the property parcel, except in the case of a water utility or municipality when it is shown that no sewer service or on-site wastewater treatment and disposal is necessary for the parcel.
3.5.8 All well permit applications shall contain the tax map, block, and parcel number for the property on which the well is to be constructed. For wells which will be constructed in areas where no tax map numbers are assigned, some evidence to that fact must be submitted with the well permit application in lieu of the tax map, block and parcel number a utility or safety permit shall be submitted with the application.
3.6 Dewatering Well System Application Procedures
3.6.12 Permit applications for dewatering wells shall include:
3.6.12.12 Duration of project, and.
3.6.12.23 Location Total depth and number of wells or excavations and location of water discharge, and.
3.6.12.34 Project location map and including site map and well point layout noting the estimated number of dewatering wells/points for the project showing well, well point, or excavation layout noting the estimated number of wells, well points, or sumps for the project, and
3.6.12.45 Maximum daily Qquantity of water to be pumped in gallons and peak rate in gallons per minute.
3.6.23 Permits are valid for the duration of the project as described in the application. The construction authorized by the permit shall commence prior to the expiration date of the permit The operation of the dewatering system authorized by the permit shall cease on or prior to the expiration date of the permit.
3.6.34 The Department may require additional information concerning the operation of the dewatering system prior to issuance of any dewatering the permit.
3.6.45 Withdrawals from dewatering facilities systems are subject to the requirements of subSsection 3.10.11 3.12.12 of these Regulations.
3.6.56 Water quality tests may be required as part of the application, at the discretion of the Department, where the Department has reason to believe that ground water groundwater contamination may exist in or near the proposed construction site.
3.78 Closed Loop Heat Pump Application Procedures
3.78.1 Permit Applications shall show the total number of vertical loops for one system on one application form The application shall show the total number, diameter, and spacing of vertical loops for one system on one form. The Department may require an additional site plan showing all closed loop locations for commercial-scale projects.
3.89 Monitor and Observation Well (Piezometer) Wells and Soil Boring Application Procedures
3.89.1 Applications for monitor and observation wells (piezometers) and soil borings that intersect the water table shall be submitted on special forms provided by the Department.
3.89.2 Applications for a maximum of ten (10) monitor wells, or observation wells (piezometers), or soil borings that intersect the water table may be submitted on a single paper form, or an unlimited number of monitor wells, observation wells (piezometers), or soil borings that intersect the water table may be submitted electronically provided the following applies:
3.89.2.1 aAll wells or soil borings are proposed with similar identical construction, and
3.89.2.2 All wells or soil borings are located on the same tax map parcel number and associated with one project, and
3.89.2.3 All wells or soil borings are screened in the same aquifer.
3.910 Application Procedures for Permits to Continue to Use Existing Wells
3.910.12 Applications for permits to use existing unrecorded wells shall, to the extent practicable, contain the same information similar to that as required in an application for a well permit to construct a new well.
3.910.23 Existing wells for which a use permit application is submitted must meet the criteria contained in these Regulations Unrecorded wells shall meet the requirements contained in these Regulations for the applicable well classification prior to being permitted.
3.102 Permit Issuance Procedures
3.102.1 Advertising Requirements
3.102.1.1 Any permit application or combination of applications received for a well(s) located on a tract of land owned by the same person, the same tax parcel, where the total estimated withdrawal is greater than fifty thousand (50,000) 1 million gallons per day shall be advertised in newspapers of local and statewide circulation with a comment period of fifteen (15) days before issuance of the well permit(s). Fire protection wells are exempt from this requirement.
3.102.1.2 A second advertisement will not be required if all of the following conditions are met: If the well permit has expired, or the requested water usage rate has increased, or well construction details or source aquifer has changed, then a new well permit application will be required. If the water usage rate has increased to over 1 million gallons per day, re-advertisement will be required.
3.102.2 The Department, in considering applications and granting permits, shall take into account the geology, hydrology and hydraulics of the area of interest, population density and water use, character of surface and subsurface, water quality, depletion rate of the water resources, sources of contamination, and other factors as may be relevant to the protection of the water resources and water supply. hydrogeology, effect on water levels, sources of contamination, water quality, population density, water use, and other factors as may be relevant in the area of the proposed well to protect the water resources of the State and for the protection of human health.
3.102.3 The Department, in its discretion, may place special conditions on the well permit such as, but not limited to, a requirement for double casing, special grouting requirements, special use restrictions, depth restrictions, notification of installation date, and special material requirements to protect the water resources, water supply, and the public health, safety and welfare. specify additional permit conditions including, but not limited to double casing, specialized grouting, water use or depth restrictions, advance notification prior to construction, special material requirements, geophysical logging, water quality sampling, and formation sampling.
3.102.4 Where an approved public water supply system is legally and reasonably available to the site to be served, the Department shall deny an application for a well permit for a potable water well. A public water supply system is deemed legally available when a Certificate of Public Convenience and Necessity has been granted to a water utility for the site. A public water supply system is deemed reasonably available when a public water distribution line is located within two hundred (200) feet of the structure or building to be served. However, a public water supply system shall not be considered reasonably available by the Department if topographic or manmade features make connection physically impractical. The Department shall not deny a well permit for a non-potable well solely on the basis of the availability of a public water supply system. The Department may not withhold an application for a permit for a potable well within the service territory served by a water utility under a CPCN or require an applicant to utilize the services of the utility in the CPCN area unless:
3.102.5 When proposed wells, with the exception of monitor, observation, and recovery wells, are to be located within the jurisdiction or service area of a municipality serving public water, the applicant shall submit a written statement of approval from said municipality with the well permit application. Subsections 3.12.4.2 and 3.12.4.3 do not apply for permits for potable wells for a farm, farmlands, or the lands of an existing mobile home community.
3.102.6 The Department may require, as a permit condition, that certain tests be done such as, but not limited to, the performance of a geophysical log on the well, the determination of water quality parameters, and the taking of formation samples. The Department shall not withhold an application for a permit for a non-potable well in an area serviced by a water utility under a CPCN.
3.102.7 The Department may require aquifer tests as a condition of any well permit. These tests may require the construction and use of one or more observation or monitor wells. When a proposed potable, agricultural, heat pump, or miscellaneous well is to be located within the jurisdiction or service area of a municipality serving public water, the applicant shall include a written statement of approval from said municipality with the well permit application.
3.102.8 A well permit number may be given verbally over the telephone in emergency circumstances in accordance with Section 3.11 of these Regulations, or when the application has been approved and is or should be in transit to the applicant. When a proposed potable, agricultural, heat pump, or miscellaneous well is to be located within the CPCN of a private public water provider, the Department shall notify the public water provider in writing.
3.102.9 An application which is denied shall be returned to the applicant accompanied by an explanation of the reasons for rejection. The Department may require aquifer tests as a condition of certain well permits. These tests may require the construction and use of one or more observation or monitor wells. Aquifer tests shall be conducted in accordance with published aquifer test procedures.
3.102.10 All water wells constructed for production purposes shall be put to beneficial use. An application that is denied pursuant to these Regulations will be returned to the preparer along with a letter of explanation, and a copy to the applicant.
3.102.11 All wells and dewatering facilities are subject to 7 Del.C. §6031 and §6037, which set forth responsibilities as it concerns remedying the depletion, exhaustion, or water quality degradation of any existing use of water caused as a result of any operation authorized under the approved permit. All wells shall be used for their intended purpose and withdrawn water shall be put to beneficial use. If a well is not used for its intended purpose, the Department may order it to be properly sealed.
3.12.12 All wells and dewatering facilities are subject to 7 Del.C. §§6031 and 6037 that mandates responsibilities concerning water supply depletion or water quality degradation of any existing use of water caused as a result of any operation authorized under the permit.
3.113 Emergency Circumstances Well Permitting
3.113.1 An emergency circumstance is deemed to exist where when a well will replace an existing is replacing a failed well and where when the Department determines that the lack of water or delay in obtaining water poses an immediate and significant danger to the health or welfare of persons or their property or where when the Department, in its discretion, has determined that other exceptional circumstances exist.
3.113.2 A permit number may be given issued verbally during business hours for the installation of a well where an emergency circumstance exists installed due to an emergency pursuant to subsection 3.13.1. If the well permit number is issued prior to well installation of the well, the driller must obtain an authorization number from the Department to validate the well permit. Within 72 hours after issuance, the driller shall submit an application, applicable fee, and completion report.
3.113.3 Within seventy-two (72) hours after the verbal issuance of a permit number under emergency circumstances, the applicant shall submit to the Department a well permit application and well completion report, which shall include the permit number. For an emergency when State offices are closed, a well may be constructed provided that the Department is notified on the first business day following such action. The driller shall submit an application, application fee, completion report, and sealing report for the replaced well, by close of business that day except for emergency replacement wells for irrigation wells that must be submitted within 72 hours after the Department has been notified.
3.113.4 In instances where an emergency circumstance exists at times when State offices are closed, a well may be constructed providing that it replaces an existing well and that the Department is notified verbally on the first working day following such action. A well permit application (including the well permit number), the appropriate application fee, and a well completion report shall be submitted within seventy-two (72) hours after notification. All wells constructed under emergency circumstances shall be constructed in conformance with these Regulations.
3.113.5 All wells constructed under emergency circumstances shall be constructed in conformance with these Regulations and all officially established policies. Any well that is constructed under emergency circumstances will not have been reviewed by the Department pursuant to subsection 3.12.2. The driller must inform the owner that construction is at the owner's risk. The Department's review may result in the well being ordered sealed and relocated.
3.124 Well Relocation During Construction
If it is necessary to relocate a proposed well or a newly constructed well in order to obtain sufficient yield, potable water, overcome a well construction problem, avoid power lines or underground utilities, to meet a distance requirement; or in the case of monitor wells, to react to field conditions determined during geophysical surveys, test pits or prior drilling, the well driller may relocate the well construction site under authority of the original permit provided that:
3.124.1 Any new site meets the requirements of these Regulations. An incomplete or newly constructed well may be relocated to adjust to newly discovered field conditions or to overcome a construction problem, under the authority of the original permit provided that:
3.124.2 The new well location is situated on the same tax parcel number listed on the permit. The unsuccessful well, cased or uncased, shall be sealed pursuant to Section 10.0. The unsuccessful well shall be sealed concurrent with, or prior to, the construction of the relocated well.
3.124.3 The unsuccessful well, cased or uncased, shall be abandoned in accordance with the requirements of Section 9 of these Regulations before the drilling equipment is removed from the site. Call in authorization must be canceled if the drill rig is removed from the site prior to construction of the relocated well. A new call in authorization number must be obtained prior to resuming construction.
3.124.4 Monitor, observation, or recovery wells shall not be relocated beyond the limits of the site as described on the well permit application(s). The relocated well location must be clearly shown on the completion report.
3.15 Pump Installer Contractor Responsibilities Well Relocation Prior to Permit Issuance
When it is necessary for a pump installer contractor or their licensed employee to open a well for any reason, the pump installer contractor is responsible for maintaining the well, while the well is open, in accordance with these Regulations and in compliance with all applicable well permit conditions including but not limited to maintenance of the upper terminus, well tag, well cap, and disinfection of the well. If it is necessary to relocate a well as a result of the Department’s hydrological review, the applicant may:
3.186 Cancellation of Permits
The Department shall have the right to cancel void any permit for a well that has not yet been constructed or is not in the process of being constructed for the protection and conservation of the water resources of the State or to protect public health as determined in the Department’s discretion.
3.197 Permit Duration
A permit shall be valid for a period of one (1) year from the date of issuance by the Department during which time the well may be constructed provided the call in authorization number has been obtained, except as noted required in subSsection 3.06.23 of these Regulations.
3.2019 Approval for Use
3.2019.1 Well permits are issued for construction and use, except as noted in subSsection 3.2019.2 and 3.2019.3 of these Regulations.
3.2019.2 Any well permit or combination of well permits issued for well(s), with the exception of non-potable wells constructed and used for fire protection purposes only, wells located on a tract of land owned by the same person the same parcel, where the total estimated yield or use is greater than fifty-thousand (50,000) gallons per day are not authorized for construction and testing only use. Prior to putting the well(s) into service the owner applicant, shall apply for and receive a Water Allocation Permit as set forth as defined in the "Regulations Governing the Allocation of Water." shall apply for a Water Allocation Permit. Fire protection wells are exempt from this requirement.
3.2019.3 Approval for use shall be obtained from the Division of Public Health for all miscellaneous public, industrial, and public wells prior to their use Prior to the use of a public well, the water supplier shall obtain approval from the Division of Public Health.
3.21 Changing Well Classification
3.221 Water Service Piping
Water service piping from the well to the structure(s) shall be installed in accordance with the requirements of the “State of Delaware Regulations Governing a Detailed Plumbing Code, administered by the Department of Health and Social Services, Division of Public Health.
45.0 Well Construction Standards
45.1 Siting Criteria
4.1.1.2 For any parcel, lot, or subdivision created or recorded within fifty (50) feet of, or within the boundaries of, an Agricultural Lands Preservation District (as defined in Title 3 Del.C. Ch. 9); all wells constructed on such parcels shall be located a minimum of fifty (50) feet from any boundary of the Agricultural Lands Preservation District. This requirement does not apply to parcels recorded prior to the implementation date of these Regulations. However, it is recommended that all wells be placed the maximum distance possible from lands which are or have been used for the production of crops which have been subjected to the application of land applied federally regulated chemicals.
5.1.1.3 50 feet from any boundary of an Agricultural Lands Preservation District (as defined in 3 Del.C. Chapter 9) for any parcel, lot, or subdivision. Wells on parcels, lots, or subdivisions created or recorded prior to April 6, 1997 are exempt. The Department requires that all wells be placed the maximum distance possible from lands where federally regulated chemicals have been applied.
45.2 Sanitary Water Quality Protection During Well Construction
45.2.1 During well construction of the well, the well and any water bearing formation aquifers shall be protected against contamination by any cause, including surface water drainage.
45.2.2 Whenever construction stops before the well is grouted and pumping equipment is installed prior to well completion, the open annular space or open borehole shall be covered and protected from surface water drainage,. and tThe well casing shall be capped in accordance with the requirements of subSsection 4.10.4 of these Regulations 5.11.
45.2.3 In the event that contaminants are encountered during the drilling process, the well driller shall ensure that adequate precautions are taken to decontaminate the drilling and related apparatus to prevent the transfer of contaminants from the site. Whenever contamination is detected during drilling, and the contamination was not anticipated by the Department and addressed in the permit conditions, the well driller shall cease work and notify the Department at (800) 662-8802. Drilling may commence upon approval by the Department.
45.2.4 Whenever contamination is observed during the drilling process, and the contamination was not anticipated or evaluated during the permit application and approval process, the well driller shall cease work and notify the Department immediately. If contaminants are encountered during drilling, the well driller shall decontaminate the drilling equipment to prevent the transfer of contaminants into uncontaminated aquifers or from the site.
45.3 Water and Wells for Well Construction
45.3.1 Water used during the for well construction of any potable well shall be obtained from sources listed in Section 4.3.3.1, 4.3.3.2 or 4.3.3.3 of these Regulations. from sources other than those listed below is prohibited:
5.3.1.1 A public water supply system meeting the requirements of the Delaware Regulations Governing Public Drinking Water Systems.
45.3.62 Disinfection of wWater used for well construction shall be accomplished disinfected as follows:
45.3.62.1 For wWater from an existing potable drinking water source, a chlorine compound shall be added to the water to produce maintained with a free residual chlorine residual of one (1) milligrams per liter (mg/L).
45.3.62.2 For wWater from a non-potable well, disinfection shall be accomplished by mixing disinfected with one (1) gallon of sodium hypochlorite pound of calcium hypochlorite (or an equivalent amount of calcium hypochlorite) to each one thousand (1000) per 1,000 gallons of drilling water. At least thirty (30) minutes contact time shall elapse between addition of the disinfectant and use of the water as drilling fluid. NOTE: Sodium hypochlorite in the form of laundry bleach contains (5.25 percent available chlorine) may be used in lieu of calcium hypochlorite. One and seven tenths (1.7) gallons of laundry bleach is are equivalent to one (1) pound of dry calcium hypochlorite.
45.45 Well Casing
45.45.1 All types of casing used for well construction shall be approved by the National Sanitation Foundation, The American Society for Testing and Materials, or by the Department for use as well casing. Well casing shall be strong enough to resist the forces imposed on it during and after installation, following applicable specifications established by the American Petroleum Institute, American National Standards Institute, and the American Society for Testing and Materials.
45.45.2 Any well casing materials which cause the delivered water to be toxic or violate state or federal drinking water standards are not permitted Casing must not cause the delivered water to be toxic or violate state or federal drinking water standards, following the specifications established by the National Sanitation Foundation.
45.45.3 Well cCasing other than thermoplastic polyvinyl chloride (PVC) or steel shall only be used with the written approval of the Department.
45.45.56 Steel well casing shall be used in for wells constructed in crystalline rocks.
45.45.67 Steel well casing up to and including a nominal size of six (6) inches shall be a minimum of at least Schedule 40. For wells larger than six (6) inches in diameter the minimum wall thickness is 0.280 inches unless prior written approval is granted unless otherwise approved by the Department.
45.45.78 Other sizes of well casing may be approved by the Department upon receipt of a written request from the water well contractor The Department may require that casing used for water supply wells be at least four inches in diameter. The Department may require that casing used for public supply wells be at least six inches in diameter.
45.45.89 Well Casing Lengths
45.45.89.1 Less than twenty (20) feet of casing shall not be used in any well Overall casing length shall be no less than 20 feet. Monitor, observation, recovery, wick drains, dewatering, and large diameter bored wells are excluded from this requirement. Required casing heights above ground surface are specified in subSsection 45.101 of these Regulations.
45.45.89.2 Wells (except wick drains, monitor, observation, dewatering, and recovery wells) constructed located on tax parcels less than one- half acre in size and on which where an on-site wastewater treatment and disposal system is or will be utilized, shall be cased to a minimum depth of forty-two (42) feet below land surface.
NOTE: SDR (standard dimensional ratio) = casing outside diameter, wall thickness.
45.45.910 Other Well Casing Requirements
45.45.910.1 Joints for all well casing shall be water tight and joined in accordance with the manufacturer's recommendations. Joints for steel well casing may be electrically welded or threaded. Joints for thermoplastic well casing may polyvinyl chloride (PVC) well casings shall be threaded or coupled with solvent weldinged or threaded. Solvent-weld joints for thermoplastic well casing shall be allowed to set to attain sufficient structural strength before the casing is installed in the bore hole All couplings and solvents shall meet ANSI/NSF Standard 14, ASTM F480 or similar requirements.
45.45.910.32 No well casing shall be cut off or cut below ground except: Casing must not be cut off below ground level pursuant to subsection 5.11.8, or
45.45.910.32.1 tTo install a pitless unit or pitless adapter, or
45.45.910.32.2 tTo install a standard plumbing “Tee”, or
45.45.910.32.3 tTo install an outer casing to terminate just below a pitless adapter or standard plumbing “Tee” connection, which that is on the inner casing, or
45.45.910.32.4 fFor abandonment sealing purposes.
45.45.910.43 In crystalline rock wWhere steel well casing is required, the well casing shall be equipped with a "drive shoe" which that shall be firmly seated by driving it into the rock prior to continuation of drilling or grouting.
45.56 Well Screens
45.56.1 All wells which that obtain water from unconsolidated aquifers shall be equipped with a well screen that will limit the entrance of sediments material into the well following development and completion.
45.56.2 Wells finished in consolidated aquifers where the bottom of the well casing is at a depth where the formation will not collapse because of pumping, are not required to be screened.
45.56.3 Well screens shall have sufficient structural strength to accomplish the purpose for which they are installed appropriate for installation.
45.56.4 The well screen openings (slots) shall provide, so far as is practicable, the maximum amount of open area, consistent with the strength of the screen material and sediment grain size (gradings) of the water-bearing formation to permit maximum transmission without clogging The screen shall be sized to meet the screen manufacturer's specifications.
45.56.5 Only machine commercially manufactured well screens, constructed of materials resistant to damage by chemical action of groundwater or cleaning agents, shall be used in the construction of a well, unless otherwise approved by the Department.
45.56.6 Well screens shall be provided with fittings necessary to seal the well screen to the well casing. Lead packers and lead swedges are prohibited Lead packers and lead swedges are prohibited.
45.56.7 A fitting shall be provided to close tThe bottom of the well screen shall be closed.
45.56.8 Screening of more than one aquifer shall not be allowed in any well. The Department may consider an exception to this requirement in the case of wick drain construction, on a case-by-case basis Aquifer interconnection, as determined by the Department, is prohibited.
45.67 Gravel Packed Wells
45.78 Well Grouting
45.78.1 All wells having annular spaces shall be grouted from the top of the gravel pack to the ground surface unless specifically exempted in this subSsection 5.8.7 or otherwise approved by the Department.
45.78.2 The annular space of all wells to be grouted annulus shall be a minimum of one and one half (1.5) inches wide (diameter of bore hole = outside diameter of casing plus three (3) inches).
45.78.3 All wells shall be grouted as soon as possible, but not later than twenty four (24) hours after the well casing has been set in place and all construction operations have been completed.
45.78.79 The water well contractor may be required to notify the Department in advance of grouting wells to provide the Department the opportunity to observe the procedure. Such condition shall be specified on the well permit. The well driller is not required to stop work to wait for Department staff unless the permit states otherwise. If the Department has scheduled a grouting inspection, the driller is not permitted to proceed with grouting unless otherwise instructed by the Department.
45.78.810 After grouting is Completed cement grout shall must be allowed to cure in accordance with manufacturer’s recommendations for a minimum of 24 hours from the completion of grouting before well construction activity, including development, can be resumed.
45.78.911 The Department shall have the right to require special may specify additional conditions pertaining to the grouting of any well. These requirements shall be specified on the well permit.
45.78.1012 Grouting Materials
45.78.1012.1 Cement -the annular space may be filled with neat Portland or quick setting (hi-early) cement in a ratio of not over six (6) no more than six gallons of water per ninety-four (94) pound sack bag of cement or as otherwise permitted by the Department following a written request and justification. A sSodium based bentonite clay may be added to the cement grout in an amount not to exceed five (5) pounds per ninety-four (94) pound sack bag of cement. When adding bentonite clay to portland cement grout, additional water shall be allowed at a rate of one (1) to two (2) gallons of water to one (1) pound of bentonite.
45.78.1012.2 Bentonite Clay -A grout is a sodium based bentonite clay may be used to fill the annular space in both the confined and unconfined unconsolidated sand and gravel aquifers in with a ratio of not less than one and one-half (1.5) two pounds of bentonite clay per gallon of water, or according to the manufacturer's specifications. It is recommended that a ratio of at least two (2) pounds of bentonite per gallon of water be used. It is also recommended that. bBentonite clay without additives shall not be used where it comes in contact with ground waters groundwater with a pH below less than five (5.0) or having a total dissolved solids content greater than one thousand (1,000) milligrams per liter (mg/L), or according to the manufacturer's specifications without Department approval.
45.78.1012.34 If rapid loss of grout material occurs during emplacement, clean coarse fill material such as sand, gravel, crushed stone, or dry cement additives manufactured for lost circulation may be used in the zone or zones in which where the loss is occurring.
45.78.113 Standards for Grouting
45.78.113.1 Well grouting shall be performed to provide a water tight seal through the annular spaces of a well to prevent that prevents fluid migration through into the annulus of the well.
45.78.113.53 If the annular space cannot be grouted in accordance with these Regulations, the well shall be abandoned in accordance with sealed pursuant to Section 910 of these Regulations.
45.89 Well Development
45.89.1 Well dDevelopment shall consist of cyclic or intermittent pumping, surging, or both, either mechanically or by using water or air under pressure. Development shall continue be performed until formation cuttings, mud, and drilling fluids and or other additives are completely removed from the well and surrounding aquifer. All wells shall be developed to remove the fine sands, silts, clays and rock particles from the aquifer surrounding the well screen or intake interval such that the water pumped from the well meets the following requirements:
45.910 Pitless Well Adapters, Pitless Well Units, and Plumbing "Tees"
45.910.1 A Ppitless well adapters or pitless well units shall be installed on all potable wells having a submersible pump or deep well ejector jet pump which utilizes an underground discharge.
45.910.2 For suction lift systems where the well casing is used as a suction line and for heat pump recharge wells, a standard plumbing "Tee" connector and extension pipe with cap may be used in place of a pitless well adapter or pitless well unit, providing the extension meets the requirements of pursuant to subSsection 45.101 of these Regulations.
45.910.3 All pitless well adapters or pitless well units shall be of a type approved by the National Sanitation Foundation, the Water Systems Council, or the Department.
45.910.4 Connections of the pitless well adapter, pitless well unit, or plumbing "Tee" to the well casing and lateral connections of piping shall be watertight. To assure a watertight connection between the well casing and the pitless well adapter or pitless well unit, care shall be exercised in cutting the hole in the well casing. It is recommended that a metal cutting hole saw and template be used. After the use of a metal cutting hole saw, all burrs resulting from the cutting operation shall be removed. If an acetylene torch is used in the cutting operation, all slag shall be removed, and both inside and outside surfaces of that portion of casing surrounding the hole shall be smooth.
45.910.5 A pitless well adapter, pitless well unit or plumbing "Tee" shall be installed in conformance with depth of water service piping requirements referenced in pursuant to subSsection 3.221 of these Regulations.
45.101 Well Caps and Upper Terminus of Wells Heads
45.101.68 Pump Well pits, pump pits and buried well seals as defined in Section 2.47 of these Regulations, are prohibited. Upon approval by the Department, potable wells may be terminated below finished ground surface if above grade completion is not feasible. The engineered design of the enclosure must be included with the application or submitted prior to modification of an existing well.
45.101.710 Any time an existing well which does not meet is identified as not meeting the requirements of this Section is accessed for any reason, the upper terminus well head shall be brought into compliance with the requirements of this Section, unless otherwise approved by the Department. Wells permitted prior to the effective date of these Regulations are exempt. The Department may impose these requirements upon the reclassification of any well.
45.112 Water Level Access Ports and Tubes
45.112.1 All wells with a pumping capacity greater than fifty thousand (50,000) gallons per day shall be constructed with an access port and access tube. Irrigation wells are not required to be equipped with an access tube.
45.112.2 All public wells which that supply a community water system and are completed in a confined aquifer, and all industrial wells completed in a confined aquifer shall have an capped access port equipped with a removable cap or plug and tube through which a water level measurement can be made. A transducer may be installed in addition to the access port and tube.
45.112.3 If the pump motor is not installed directly over the well, the access port shall be located directly on top of the well.
45.112.4 If the pump motor is installed directly over the well, an access port pipe shall be installed through the pump base or outside the well casing at some accessible point below the base of the pump.
45.112.5 The access port and tube shall have a minimum inside diameter of one half (0.5) three-quarters inch, so that the position of the water level may be determined by measurement with a steel or electric tape. The access port and tube shall be equipped with a removable cap or plug.
45.112.6 The access port shall be installed and plugged in a manner which constructed to prevents the entrance of water, dust, insects, or other foreign material, and permits ready allow access for water level measurements.
45.112.7 The use of Aair line gauges are not acceptable for water level measurement devices is prohibited.
45.123 Meters, Pumping Equipment, and Vents
45.123.1 All wells with a design capacity greater than fifty thousand (50,000) gallons per day shall be permanently equipped with a meter(s) or meters capable of acquiring instantaneous flow rate and totalized flow measurements accurate to within plus/minus five percent (+/-5%) of the actual flow rate, unless otherwise approved by the Department or pursuant to subsection 5.13.2. Flow rate indicators may consist of any combination of test dials and direct reading indicators. Elapsed timers are not acceptable flow metering devices except as noted in Section 4.12.2 of these Regulations.
45.123.2 Irrigation wells, agricultural wells, and non-potable wells constructed and used for fire protection purposes only and which have with a design capacity greater than fifty thousand (50,000) gallons per day shall be permanently equipped with an elapsed time meter, readable in hours or minutes, equipped on the well's drive engine or motor to measure actual hours of operation. If an irrigation well has been determined by the Department to be located in an area of concern such as areas of very high groundwater use or saltwater intrusion, the Department may require the well to be permanently equipped with a meter or meters capable of acquiring instantaneous flow rate and totalized flow measurements accurate to within 5 percent of the actual flow rate.
45.123.34 A backflow protection device shall be installed in a pumping system where the pumping equipment is used to apply wastewater, fertilizers, or chemicals, and where the pumping equipment is also connected to a water well containing a well if the pumping system is connected to a treatment system, is used to convey wastewater, fertilizers, chemicals, or provides fire protection pursuant to subsection 6.3.3.
45.123.67 Well vents shall be screened and positioned covered with corrosion-resistant mesh screen and down-turned to prevent the entrance of surface water, dust, insects, or other foreign material.
45.123.78 Upon completion of installation, the person installing the pump the driller or pump installer shall disinfect the well and pump in accordance with Section 67.0 of these Regulations.
56.0 Special Construction Requirements
56.1 Monitor and Observation Wells Construction
56.1.32 Monitor wWells shall must be constructed by a method which allows for the determination of characteristics of the geologic materials under the site unless otherwise approved by the Department to allow for characterization of geologic materials and sampling. The Department may place additional requirements on wells that are used as part of a specific environmental program.
56.2 Coastal Well Construction Flood Zone Wells
56.2.1 Special construction standards as set forth in this section are for wells in areas prone to wave action or flooding. These coastal areas are shown on Flood Insurance Rate Maps published by the Federal Emergency Management Agency and are designated as "A" or "V" zones.
56.2.2 Wells described in 5.2.1 above and constructed on waterfront properties shall be constructed on the landward side of the property, if possible unless otherwise approved by the Department.
6.2.4 Well construction beyond the Department's coastal building restriction line as defined in the Delaware Regulations Governing Beach Protection and the Use of Beaches is prohibited.
56.3 Public, Miscellaneous Public and Industrial Wells Construction
56.4 Heat Pump Recharge Wells Construction
56.4.1 All water obtained from wells for the operation of supplying a heat pump system shall be injected into the source aquifer. from which it came. Exemptions from this requirement may be considered wWhere the requirements of subSsections 56.4.4 and 56.4.5 of these Regulations have been met, and the aquifer will not accept the water from the supply well, the Department may approve an alternate method at its discretion. and:
56.4.2 No heat pump recharge well may be constructed within fifty (50) feet of any identifiable potential or existing source of contamination, including but not limited to septic tanks, tile fields, and manure piles. Decommissioned septic systems are not a potential or existing source of contamination for heat pump recharge wells.
56.4.3 No corrosion inhibitors, water softening, or other additives shall be added to the water that will eventually be returned into the ground Other than thermal alteration, groundwater recharged to the aquifer shall be in its natural condition.
56.4.4 The diameter and screen length of all heat pump recharge wells shall be equal to or greater than the diameter and screen length of the heat pump supply well, unless otherwise approved by the Department.
56.4.5 Where a heat pump recharge well meets the requirements of subsection 56.4.4 and all other requirements of these Regulations, and the receiving aquifer will not readily accept the return flow, another well will be required of the owner. In such cases it is the well owner's responsibility to provide for the additional well. An exception to the requirement of another well may be considered upon written request.
56.5 Heat Pump Closed Loop and Direct Exchange (DX) Wells Construction
56.5.1 No heat pump closed loop or direct exchange wells shall be constructed within fifty (50) feet of any identifiable potential or existing source of contamination, including but not limited to septic tanks, tile fields, and manure piles. Decommissioned septic systems are not a potential or existing source of a contamination for heat pump closed loop or direct exchange wells.
56.5.2 The solution contained in the heat pump closed loop well piping system shall not contain any toxic substances be free of characteristic hazardous substances with the exception of ethanol-base antifreeze solutions designed for such systems. The use of non-toxic propylene-glycol-based antifreeze solutions is recommended.
56.5.3 The heat pump closed loop well piping system shall comply with the requirements of Section 4.10.3 of these Regulations Refrigerant prohibited by the Environmental Protection Agency shall not be used in direct exchange wells.
56.5.4 All buried pipe shall be marked with underground warning tape at a depth of twenty-four (24) inches Prior to being connected to a manifold, the ends of the loop shall be temporarily sealed by fusion or capping. The use of tape is prohibited.
56.5.5 All closed loop heat pump system piping shall be capped and protected until the manifold piping is ready to be connected buried pipe shall be marked with underground warning tape at a depth of 24 inches.
56.5.6 Pressure testing of the closed loop heat pump system network shall be conducted prior to putting the system into operation.
67.0 Well Disinfection
67.1 General Requirements
67.1.1 Disinfection of all newly constructed or repaired wells, in accordance with subSsection 67.2 is required, except as noted in subSsection 67.1.46 and 67.1.57 of these Regulations. Bacteriological sampling and testing of the well is recommended as the final act of well construction or repair.
67.1.2 After any repair or maintenance operation to the well, pumping equipment or piping, or other system components, those system components shall be disinfected. For domestic wells, the entire plumbing system shall be disinfected.
67.1.34 Calcium hypochlorite (National Sanitation Foundation/American National Standards Institute (NSF/ANSI) Standard 60 Drinking Water grade or equivalent) shall be used for disinfection of the well and appurtenances, such as the pump, piping and distribution system, unless otherwise approved by the Department.
67.1.46 No mMonitor wells shall not be disinfected without prior written approval of the Department except for monitor wells used for bacterial sampling.
67.1.57 No dDewatering wells need shall not be disinfected unless specifically required as a condition of the well permit.
67.1.68 The Department shall have the right to may require special specific disinfection procedures for deep wells with a higher pH, turbidity, lower temperatures, iron, organic matter, ammonia, or other chemical constituents that interfere with disinfection.
67.2 Required Disinfection Procedures
67.2.1 The following procedures shall be followed when disinfecting wells, unless otherwise approved by the Department. Other methods may be considered provided it can be demonstrated that they will yield comparable results.
67.2.2 Calcium hypochlorite tablets (NSF/ANSI Standard 60 Drinking Water grade or equivalent) sufficient for a dosage of at least one hundred (100) milligrams per liter (mg/L) free available chlorine shall be dropped emplaced into the well screen before any pump or pumping equipment are installed. As a general guideline, it is recommended that the dosage calculation be based on two hundred (200) milligrams per liter (mg/L) free available chlorine to account for chlorine demand.
67.2.3 After the pump or pumping equipment has been installed, the pump shall be started and water pumped to waste through a discharge line the chlorine solution shall be fed through the entire supply line to waste until chlorine is detected. If the concentration is less than one hundred (100) milligrams per liter (mg/L), more calcium hypochlorite (NSF/ANSI Standard 60 Drinking Water grade) shall be added until the concentration is at least one hundred (100) milligrams per liter (mg/L) to the well until such concentration is reached.
67.2.4 The internal surface inside of the well casing above the static water level shall be rinsed disinfected with the chlorine solution from the discharge line in a manner sufficient to thoroughly rinse the well casing, or for fifteen (15) for 30 minutes, whichever is less. If granular disinfectant is used, the interior metal surfaces of the well casing above the static water level shall be inspected, and any granules shall be rinsed prior to closing the well.
67.2.5 If it is not practicable to discharge the pumped water back into the well (as described above), fractured calcium hypochlorite tablets (tablets broken into varying sizes ranging from half tablets to a granular size) shall be added to the well. The entire surface of the well casing shall then be rinsed with at least ten (10) gallons of a one hundred (100) milligrams per liter (mg/L) chlorine solution made by dissolving calcium hypochlorite (pulverized tablets or granular) in water If the well is connected to a public distribution system, the chlorinated water shall be pumped to the permanent disinfection unit, if present, or to the end of the water main where it is isolated from the remainder of the distribution system and can be blown off. The well contractor shall coordinate public distribution system disinfection with the Division of Public Health.
67.2.6 If the well is connected to a distribution residential system, the chlorinated water shall be drawn through the entire system until a strong odor of pumped until chlorine is detected at each tap, unless otherwise approved by the Department.
67.2.7 The well and distribution system shall be allowed to stand for at least twelve (12) hours, twenty-four (24) hours is recommended Disinfectant shall be in contact with the well components and any distribution system components, pursuant to subsections 7.2.5 and 7.2.6, a minimum of 24 hours, and not to exceed 48 hours.
67.2.8 If the free chlorine residual is less than five (5) milligrams per liter (mg/L) after twelve (12) 24 hours (using a DPD test kit), the above procedure pursuant to subsection 7.2.7 shall be repeated. When the free chlorine residual is at least five (5) milligrams per liter (mg/L) after twelve (12) 24 hours, the well and distribution system shall be pumped to waste.
67.2.910 Should the well fail to be acceptably disinfected as determined by the Department; the Department may require other measures such as re-disinfection, repair, or abandonment; to be determined on a case-by-case basis sealing.
67.2.101 The amount of calcium hypochlorite needed to produce a dosage of one hundred (100) milligrams per liter (mg/L) free available chlorine per one hundred (100) feet of water column is given in the following table:
Calcium Hypochlorite Needed to Dose 100 Feet of Water at 100 mg/L Casing Diameter (Inches) Volume 100 Feet (Gallons) * Calcium Hypochlorite 2 16.3 1/2 oz. 4 65.3 2 oz. 6 146.9 4 oz. 8 261.1 6 oz. 10 408.0 8 oz. 12 587.5 12 oz. 16 1,044.5 20 oz. 20 1,632.0 2 lb. 24 2,350.1 3 lb.
67.2.112 Notes
78.0 Well Completion Reports
78.1 General Requirements
78.1.1 A well completion report and formation log shall be submitted to the Department on forms in a format provided by the Department, not later than thirty (30) days after the construction of any well, except as required in subSsection 3.113.3 of these Regulations.
78.1.2 Each completion report shall be signed by the well driller or well driver in direct on-site supervision of the well construction, unless otherwise approved by the Department, certifying that all information contained on the report is true and correct.
78.1.43 Failure to submit well completion reports as required by this Section shall result in the denial of additional well permits, following written notification to the responsible water well contractor.
78.21.27 If the actual well site location is at all different than from that proposed on the well permit application, a the new site plan location shall be included on the well drawn and noted on the completion report. If a site adjustment is made after permit issuance, the well driller or well driver is required to see that the well complies with these Regulations.
78.21.38 For wells constructed in unconsolidated sand and gravel aquifers, the well description formation log shall include notation of the sediments type, grain size (such as gravel, coarse, medium and fine sand, silt, clay, etc.), color, texture, accessory materials, thickness, and depth of individual layers or lenses, and any characteristics of the sediments that appear different or outstanding other distinctive features.
78.21.49 For wells constructed in crystalline rock, the well description formation log shall include the predominant color of the rock, whether or not it breaks easily, whether the rock is veined with stringers of different material or color and any characteristics of the rock that appear different or outstanding. Depth, interval and estimation of flow rate of all water-bearing zones as encountered during drilling shall be specified rock type (such as schist, gneiss, marble), color, hardness, texture, veining, and all other distinctive features, including depth interval, and estimation of flow rate of all water-bearing zones as encountered during drilling.
89.0 Well Maintenance And Pump Repair
89.24 Repair of any well having a buried well head terminating below ground shall include the extending extension of the well casing above the finished ground surface as specified in Section 4.10 of these Regulations pursuant to subsection 5.11, unless otherwise approved by the Department.
89.35 The repair of any industrial, or public, water supply or irrigation well shall include the installation of a water level access port and tube as required in Section 4.11 of these Regulations pursuant to subsection 5.12, if applicable.
910.0 Well Abandonment Sealing
910.1 General Requirements
910.1.32 Within thirty (30) days of abandonment the sealing of a well the water well contractor shall submit a well abandonment sealing report to the Department, on a form in a format provided by the Department. The report shall be completely filled out completed and signed by the well driller or well driver in charge of on-site supervision supervising the site work.
910.1.43 The Department may require any well owner to have a well abandoned properly sealed if the Department determines that any of the following conditions apply:
910.1.43.1 tThe well has been abandoned or determined of no beneficial use, or
910.1.43.2 tThe well is causing or is a potential source of contamination to waters of the state, interferes with the withdrawal of a prior water user unless compensation for such interference is provided to the satisfaction of the Department, or
910.1.43.3 tThe well is producing water that is contaminated, causing or is a potential source of contamination to waters of the State, or
910.1.43.4 the operation of the well causes diminishment in the quantity or quality of any neighboring wells or surface waters, The well is having an adverse influence of waters of the State, or
910.1.43.5 tThe well is deemed a potential safety hazard to the lives health and welfare of humans or animals, or
910.1.43.6 tThe well is not constructed in accordance with the permit conditions or these Regulations., or
910.1.54 A well penetrating several that interconnects aquifers or formations shall be filled and sealed in such a way as to prevent the vertical movement of water from one aquifer to another within the well unless otherwise approved by the Department.
910.1.65 The Department shall have the right to require special abandonment procedures be followed to avoid or mitigate water quality or water quantity problems may require or approve specific sealing procedures.
910.1.7 All wells for which a replacement well permit has been issued and which are accessible shall be abandoned within sixty (60) days of completion of the replacement well. The well(s) shall be abandoned as set forth in these Regulations unless specific written approval for maintaining the replaced well is granted by the Department being replaced, with the exception of public wells, shall be sealed within 15 days of completion of the replacement well unless approval for retaining the replaced well is granted by the Department pursuant to subsection 3.11. Public wells shall be sealed within 30 days of completion of the replacement well.
910.1.8 Wells that are unsuitable for their intended use shall be abandoned sealed pursuant to subsection 10.3 or converted to another classification reclassified in accordance with Section 3.21 of these Regulations pursuant to subsection 3.11.
910.2 Sealing and Fill Materials
910.2.1 Only Cconcrete, Portland cement grout, sodium-based bentonite clay grout, or combinations of these materials or other materials approved by the Department are considered sealing material and shall be used to abandon seal a well in accordance with Section 9.3 of these Regulations.
910.2.2 Only Ddrill cuttings, clay, silt, sand, gravel, and crusher run are herein considered acceptable fill material and may only be used in the abandonment of a well in accordance with Section 9.3 of these Regulations pursuant to subsections 11.3.6, 11.3.7, or 11.3.8.
910.2.3 Portland cement grout and sodium-based bentonite clay grout shall meet the requirements of Section 4.7.10.1 and 4.7.10.2 of these Regulations pursuant to subsections 5.8.12.1 or 5.8.12.2.
910.3 Abandonment Sealing Procedures
910.3.1 Prior to abandonment, all wells shall be investigated to determine their condition, the details of construction, and whether or not any obstructions exist that will interfere with the filling and sealing process. Any obstructions shall, if possible, be removed by cleaning out the hole or redrilling sealing, the well driller or well driver shall determine the condition of the well, its construction, and obstructions that may interfere with sealing. Obstructions shall either be removed or eliminated through the process of over-drilling, if necessary.
910.3.23 Where the annular space may provide a significant avenue for ground-water contamination or otherwise endanger public health or safety, the Department may require that the well casing be ripped, perforated, or removed entirely to assure that the well casing and annular space or voids are filled with sealing or fill materials. Alternate abandonment procedures may also be approved by the Department The Department may require that the well casing be ripped, perforated, or removed entirely to ensure that any previously un-grouted annular space or voids are filled with sealing materials.
910.3.34 All wells shall be filled sealed with the appropriate sealing or fill materials starting by pressure grouting through a tremie pipe from the bottom of the well upward to the ground surface, except as noted in Sections 9.3.6, 9.3.7, and 9.3.8, or subsections 10.3.6, 10.3.7, or 10.3.8 unless otherwise approved by the Department.
910.3.45 When Portland cement grout or concrete is used as a sealing material, it shall be emplaced in one continuous operation until grout returns to the surface.
910.3.6 A dug well larger than twenty-four (24) inches in diameter shall be filled and sealed by placing fill material in the well to a level approximately five (5) feet below land surface, and placing a three (3) foot plug of sealing material above the fill. The sealing material for the upper portion of the well shall be allowed to spill over into the excavation to form a cap. The remainder of the well shall be backfilled with native soil The top one foot of the well may be covered with fill material.
910.3.7 For wells penetrating fractured or cavernous rock, coarse fill materials may be used opposite to fill the cavernous or creviced rock portions of the well. Sealing material shall extend to the surface The well shall be sealed from the bottom of the casing or from a depth of twenty (20) feet, whichever is greater well to the cavernous zone and from the top of the cavernous zone to the land surface.
910.3.8 Dewatering wells and shallow monitoring or observation less than twenty four (24) 20 feet deep and two (2) inches or less in diameter shall have the entire casing removed unless otherwise approved by the Department. After removal of the casing, the wells may shall be abandoned sealed or filled with natural fill materials drill cuttings.
101.0 Well Identification Tag
101.1 Upon completion of the well and before leaving the site, the well driller, well driver, or pump installer shall be responsible for the attachment of fasten the well identification tag issued by the Department. In cases where the well driller will be returning at a later date to hook-up the well, the tag may be secured with a temporary piece of wire or clamping device until after the hook-up has been completed. The tag shall be permanently fastened to the well casing above finished grade by means of a one half (1/2) or three-eighths (3/8) inch stainless steel band or other device or method approved by the Department. The Ttags for a flush mount installations should be mounted to the sides of the road boxes or by any method which will permanently display the well permit number installation shall be permanently fastened to the top of the vault lid. The tag for an irrigation well with a concrete pad may be fastened to the pad.
101.2 The Ttags for a well permits issued via by fax or under emergency circumstances shall be affixed fastened to the well casing within five (5) working days of the well driller's receipt of the tag.
101.3 Well tags shall be returned to the Department within thirty (30) days of cancellation, revocation, or expiration of an unused permit, or the abandonment sealing of a tagged well.
12.3.1 Public Notice. Public notice of Applications for an Alternative Method of Compliance shall be made in accordance with 7 Del.C. §6004. Applications for an Alternative Method of Compliance shall be advertised in a newspaper of general circulation in the county in which the activity is proposed and in a daily newspaper of general circulation throughout the State with a comment period of 15 days.
113.0 Variances
Applications for variances to any section of these Regulations except those which concern a source of water for three or fewer families shall be advertised in newspapers of local and statewide circulation with a comment period of fifteen (15) days. A public hearing will be held if a meritorious request is received within the fifteen (15) day period. A public hearing request shall be deemed meritorious if it exhibits a familiarity with the application and a reasonable statement of the variance's probable impact.
11.1.2 The applicant is unable to comply with the requirements of 7 Del.C. Ch. 60 and these Regulations because the necessary technology or other alternative methods are not or have not been available for a sufficient period of time or the financial cost of compliance by using available technology is disproportionally high with respect to the benefits which continued operation would bestow on the lives, health, safety and welfare of the occupants of this State and the effects of the variance would not substantially and adversely affect the policy and purposes of this chapter;
Applications for and decisions on a variance request to any Section of these Regulations shall be made in accordance with 7 Del.C. §6011.
13.2.1 Good faith efforts have been made to comply with 7 Del.C. Ch. 60 and these Regulations;
13.2.2 The person applying for the variance is unable to comply with the rules or requirements of either 7 Del.C. Ch. 60 or of these Regulations, because the necessary technology or other alternative methods of control are not available or have not been available for a sufficient period of time or the financial cost of compliance by using available technology is disproportionately high with respect to the benefits which continued operation would bestow on the lives, health, safety and welfare of the occupants of this State and the effects of the variance would not substantially and adversely affect the policy and purposes of this chapter;
13.4.4 The granting of a variance shall not in any way limit any right to proceed against the holder for any violation of the variance. Any rule or requirement of 7 Del.C. Ch. 60 or of these Regulations that is not incorporated in the variance provisions shall remain in full effect.
124.0 Public Hearings And Appeals
124.1 Any right to Ppublic hearings shall be held in conformance with the requirements of 7 Del.C. §6006.
124.2 Decisions of the Secretary may be appealed to the Environmental Appeals Board pursuant Any right to appeal shall be in conformance to 7 Del. C. §6008.
Last Updated: December 31 1969 19:00:00.
site map   |   about this site   |    contact us   |    translate   |    delaware.gov