Current through Register Vol. 48, No. 12, March 22, 2024
a) Upper
Well Terminal. Well casing and pitless well adapters shall terminate not less
than 8 inches above the finished ground surface or pump house floor and at
least 24 inches above maximum high water level in areas where flooding is
likely to occur. No casing shall be cut off or cut into below ground level
except to install a pitless well adapter.
b) Well Pits
1) No new well pits shall be
allowed.
2) Existing pits will be
accepted if the following conditions exist:
A)
The pit shall be structurally sound and watertight. The casing shall extend at
least 12 inches above the pit or basement floor and have a well seal to prevent
contaminants from entering the well.
B) A watertight manhole and cover must be
provided for the pit.
3)
No existing well pit shall be modified to comply with subsection (b)(2) of this
Section. Existing pits which are not in compliance with subsection (b)(2) shall
be eliminated and the floor or one wall of the pit shall be broken or removed
and the pit shall be filled with compacted earth.
c) Pitless Well Adapter
1) Installation and Approval. No well casing
shall be cut off or cut into below ground surface except to install a pitless
well adapter below the frost level. Pitless well adapters or pitless units
installed on plastic well casing shall be pressurized at the point of
attachment with the well casing, unless the pitless unit is solvent welded onto
the plastic well casing and the riser casing of the pitless unit is plastic.
Pitless well adapters installed on steel well casing shall be pressurized at
the point of attachment with the well casing, unless the pitless unit is
threaded or welded onto the well casing. Pitless well adapters shall comply
with the requirements of the NSF International Standard Number 56 entitled
Pitless Well Adapters and shall be tested and approved as meeting this standard
by Allied Laboratories, 716 North Iowa Avenue, Villa Park, Illinois and shall
be listed by the Department as meeting this standard. A list of approved
pitless well adapters will be periodically updated and a copy of this list may
be obtained from the Department. The annular opening between the well casing
and the well bore hole or any excavation made to install the pitless adapter
shall be filled with earth to minimize settling and mounded to provide drainage
away from the well. The contractor installing the pitless well adapter shall be
responsible for the installation of the earth backfill.
2) Well Caps. There shall be no openings
through the well cap except for a factory installed vent, air line and power
supply wiring, unless a proposal is submitted to and approved by the
Department. To be approved, the proposal must show that any entrance into the
well cap is watertight and meet the following conditions:
A) Prevent surface water from entering the
water supply.
B) Be secured in
position.
C) Be removable with
tools only.
D) Be resistant to
weathering and corrosion.
d) Hand Pumps. Hand pumps shall be of the
force type equipped with a packing gland around the pump rod, a delivery spout
which is closed and downward directed, and a one-piece bell type base which is
part of the pump stand or is attached to the pump column in a watertight
manner. The bell base of the pump shall be securely attached to the casing or
pipe sleeve.
e) Power Driven Pumps.
The design and operating principles of each type of power driven pump
determines where each may be located with respect to a well. The location
selected for the pump determines what factors must be considered to make an
acceptable installation.
1) Location Above
Well. Any power driven pump located over a well shall be so mounted on the well
casing, pipe sleeve, pump foundation or pump stand that a watertight closure is
or can be made for the open end of the casing or sleeve. The pump base bolted
with a neoprene or rubber gasket or equivalent watertight seal to a foundation
or plate provides an acceptable seal. On large pump installations, the bolting
may be omitted when the weight of pump and column is sufficient to make a
watertight contact with the gasket. If the pump unit is not located over the
casing or pipe sleeve, but the pump delivery or suction pipe emerges from the
top of the well, a well seal or equivalent shall be installed between the well
casing and pipe to provide a watertight closure.
2) Location in Well. This type of location is
permissible for submersible pumps only. When the discharge line leaves the well
at the top of the casing, the opening between the discharge line and casing or
pipe sleeve shall be sealed watertight with a well seal or equivalent device.
When an underground discharge is desired, a pitless well adapter shall be
installed. A check valve shall not be permitted between the well and the inlet
side of the pressure tank.
3)
Offset From Well. Pumps offset from the well, if not located in an above ground
pump house or other building, may be located in an approved basement provided
the pump and all suction pipes are elevated at least 12 inches above the floor.
All portions of suction lines buried below the ground surface between the well
and the pump shall be enclosed in a pressure discharge line maintained at
system pressure.
f)
Vents. Vent piping shall be of adequate size to allow equalization of air
pressure in the well and where wells are greater than four inches in diameter,
the vent shall be not less than one-half inch in diameter. Vent openings shall
be located in such a manner as to prevent contamination of the well. The vent
opening shall be turned down, secured in position, reasonably tamper proof, and
be screened with not less than 24-mesh durable screen or filtered in such a
manner as to prevent the entry of insects and shall terminate at least 8 inches
above finished ground surface. Particular attention shall be given to proper
venting of wells in areas where toxic or inflammable gases are known to be a
characteristic of the water. If determined that either of these types of gases
are present, all vents when located in buildings shall be extended to discharge
outside of the building at a height where they will not be a hazard. Venting is
required on all wells except driven water wells or flowing water
wells.
g) Pump Bearing Lubrication.
Lubrication of bearings of power driven pumps shall be with water or oil which
will not adversely affect the quality of the water to be pumped.
1) Water Lubrication. If a storage tank is
required for lubrication water, it shall be designed to protect the water from
contamination.
2) Oil Lubrication.
The reservoir shall be designed to protect the oil from contamination. The oil
shall not contain substances which will cause odor or taste to the water
pumped.
h) Electrical
Installations. All electrical installations shall be performed and maintained
in accordance with the National Electrical Code 1996 edition.
i) Backflow Prevention For Chemical Injection
Systems.
1) Non-Potable Water Wells. Where a
chemical injection system is connected directly to a water well used for
irrigation and which is not used as a potable water supply, a single check
spring loaded backflow preventer shall be installed between the point of
chemical injection on the pump discharge piping and the water well in
accordance with the manufacturer's instructions. The backflow device (see
Illustration A) shall be provided with the following:
A) Valving so that water can be drained from
the system to prevent freezing.
B)
A vacuum relief valve to prevent backsiphoning of chemicals into the
well.
C) An automatic low pressure
drain at least 3/4 inches in diameter, positioned so that when draining occurs
liquid will run away from the well. At new installations, the low pressure
drain shall be at least six inches above grade. The automatic low pressure
drain shall quickly drain the check valve body of water when operation of the
water well pump is discontinued.
D)
A watertight seal around the check valve.
E) An inspection port four inches in diameter
to allow inspection of the operation of the check valve.
F) The check valve shall withstand a minimum
hydraulic pressure of 150 psi without leaking.
2) Existing chemical injection systems
connected directly to a water well shall be brought into compliance with this
Section by January 1, 1996. When modifications, reconstruction, or repairs to
the chemical system are made or where removal of the pump takes place, the
chemical system and well shall conform to this Section.
3) The water well pump and the chemical
injection pump shall be electrically connected so that when the water well pump
stops, the chemical pump will shut off automatically.
4) All backflow devices which meet the
requirements of subsections (i)(l)(A) through (F) are approved for this
purpose. The Department shall establish and make available a list of all such
backflow devices.
j)
Piping Material. All piping from the pitless adapter of a potable water well to
the pressure tank shall be watertight and a minimum of 160 p.s.i. rating at
73.4 ~F (+ or - 3.6 ~F), and shall conform to the materials required for water
service pipe as listed in Section 890.Appendix A, Table A Approved Materials
for Water Service Pipe of the Illinois Plumbing Code (77 Ill. Adm. Code 890) or
listed in Table A of this Part. All piping used in the chemical injection
system shall be chemically compatible with the chemical product being
applied.
k) Sampling Faucets.
Provision shall be made for the collection of water samples by installing a
down turned smooth nosed faucet, not less than 18 inches above the floor, in a
convenient location between the water well and the pressure tank or as near to
the well as possible.
l) Reports.
When a water well pump has been installed in a new well or when a pump size is
changed or the pump setting depth is changed in an existing well, the
contractor shall submit a report of pump installation within 30 days to the
Department, or approved local health department, on such forms as are
prescribed and furnished by the Department.