10 CSR 23-3.050 - Pump Installation and Wellhead Completion
(1) Pumps and Pumping Equipment.
(A) Pumps shall be surface mounted or
submersible. Water may not be withdrawn from a well by using a bailer or well
bucket.
(B) Surface mounted pumps
shall be constructed so that no unprotected openings into the well casing
exist. A hand pump, hand pump head, stand or similar device shall have a closed
spout directed downward and a pump rod that operates through a stuffing box. A
power driven pump shall be attached to the casing or approved suction or
discharge line by a watertight connection.
(C) For inactive wells or new wells waiting
on pump installation, the wellhead shall be fitted with a cap that is
watertight and sufficiently installed to prohibit vandalism or other
contamination from the surface.
(D)
Backflow Prevention.
1. A backflow prevention
device shall be installed on all wells where agricultural chemical injection or
other pressurized contaminant sources are used.
2. A double check-spring loaded backflow
prevention device shall be installed between the point of chemical injection
and the water well in accordance with the manufacturer's instructions and shall
have the following:
A. A valve so that water
can be drained from the system to prevent freezing;
B. A vacuum relief valve to prevent
back-siphoning of chemicals into the well;
C. An automatic low pressure drain at least
three-quarters inch (3/4") in diameter that drains the check valve body of
water when operation of the pump is discontinued;
D. A watertight seal around the check
valve;
E. An inspection port at
least four inches (4") in diameter to allow inspections of the inside of the
check valve; and
F. A check valve
able to withstand a minimum hydraulic pressure of one hundred fifty (150)
pounds per square inch (psi) without leaking and resistant to
corrosion.
3. The well
pump and the chemical injection pump shall be electrically or mechanically
connected so that when the well pump stops, the chemical pump will shut off
automatically.
(E)
Electrical.
1. A permitted pump installation
contractor shall perform all electrical wiring that impacts the operation of
the pump or pressure system to the point of entry. Any person may perform
electrical wiring on high yield wells.
2. The electric wire shall not be installed
through the pitless connection and shall be grounded.
(F) Plumbing. A permitted pump installation
contractor, except as exempted in section 256.607.2, RSMo, shall perform all
plumbing that impacts the distribution of water from its source, through the
pressure system to the point of entry. This includes but is not limited to
pressure tanks, water treatment equipment and any other materials needed to
complete the installation of the water system, inside and outside of the
structure.
(2) Water
suction lines for surface pumps shall be constructed of galvanized iron, steel,
plastic, or aluminum. Other materials may be used provided advanced written
approval is obtained from the department. A well seal or equivalent shall be
installed between the well casing and suction pipe that is
watertight.
(3) Frost proof yard
hydrants shall not be installed directly on the wellhead and be securely
anchored.
(4) Pump Discharge Lines.
(A) A discharge line from the well to the
pressure tank shall not be under negative pressure during normal
operation.
(B) Pump discharge ports
on high yield wells shall be covered when not in use.
(5) Drop pipe shall be rigid, of sufficient
strength to support the weight and torque of the pump, be able to withstand the
operating water pressure, be impact and abrasion resistant, and not impart
contaminants into the groundwater.
(6) Wellhead Completion.
(A) Above-ground connections shall-
1. Be a minimum of twelve inches (12") above
ground surface or well house floor;
2. Have watertight piping and electrical
connections that are mechanical or welded and sealed;
3. Have a protective well cap that seals
tightly against the casing and has a screened vent or a casing seal that has a
new rubber gasket. Cutting the rubber well seal for installation is not
allowed;
4. When used, have surface
driven pumps extending at least one inch (1") into the base of the
motor;
5. Be provided with a
minimum of one-half inch (1/2") diameter screened vent pointed
downward;
6. Hubcap type well caps
are not approved for permanent use; and
7. Temporary caps shall be used until a
permanent cap or well seal is installed.
(B) Below-ground connections shall-
1. Use a pitless adaptor or pitless unit of
sufficient strength to withstand normal operating stress;
2. Construct the hole cut in the casing for
the installation of the pitless adaptor/unit to ensure a watertight seal with
the pit-less adaptor/unit in place;
3. Use a protective well cap that seals
tightly against the casing and has a screened vent; and
4. Have native or grout material packed
tightly around the casing and discharge pipe after installation.
(7) Disinfection.
(A) The permittee shall be responsible for
disinfecting a new, repaired, or reconstructed well or pump installation or
replacement.
(B) The well, pressure
tank, and pumping equipment shall be disinfected with chlorine to achieve a
concentration of at least one hundred (100) parts per million (ppm) of
chlorine.
(C) The minimum contact
period before pumping the well to waste and flushing the chlorine solution from
the distribution system is two (2) hours.
(D) When pulling a pump the electrical wire
and drop pipe shall not touch the ground. If contamination occurs, disinfect
all items prior to reinstallation.
(E) A discharge of chlorinated water to
waters of the state shall be reported to the department.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.