Current through August 31, 2023
01.
Sample
Tap Required. A sample tap suitable for collecting bacteriological
samples shall be provided on the discharge piping from every well at a point
where pressure is maintained but prior to any treatment. This sample tap shall
be of the smooth-nosed type without interior or exterior threads, shall not be
of the mixing or petcock type, and shall not have a screen, aerator, or other
such appurtenance. The sample tap for collecting bacteriological samples may be
used for other sampling purposes. In addition, threaded hose bib taps may also
be used for collecting samples, other than bacteriological samples, if equipped
with an appropriate backflow prevention device as may be necessary to protect
the public water system from contamination. (3-24-22)
02.
Discharge Piping. The
discharge line shall be equipped with the necessary valves and appurtenances to
allow a well to be pumped to waste at the design capacity of the well via an
approved air gap through an approved non-corrodible screen at a location prior
to the first service connection, and shall meet the following requirements:
(3-24-22)
a. Be designed to minimize friction
loss. (3-24-22)
b. Have control
valves and appurtenances located above the pump house floor when an
above-ground discharge is provided. (3-24-22)
c. Be protected against contamination.
(3-24-22)
d. Vertical turbine pumps
shall be equipped with an air release-vacuum relief valve, or equivalent,
located upstream from the check valve, with exhaust/relief piping terminating
in a down-turned position at least eighteen (18) inches above the floor and
covered with a twenty-four (24) mesh corrosion resistant screen.
(3-24-22)
e. Have all exposed
piping, valves and appurtenances protected against physical damage and
freezing. (3-24-22)
f. Be properly
anchored to prevent movement, and protected against surge or water hammer.
(3-24-22)
g. The pump to waste
discharge piping shall be valved to ensure that other system components that
could be negatively affected by the quality of the discharged water are not
pressurized by the water that is being pumped to waste. (3-24-22)
h. Where two (2) or more wells are connected
to a common well house, the discharge piping shall be designed to ensure that
each well can be pumped to waste independently without affecting the ability of
the other well or wells to pressurize the system. (3-24-22)
03.
Pressure Gauge Required. A
pressure gauge shall be provided on all discharge piping. (3-24-22)
04.
Flow Meter and Check Valve.
Unless otherwise approved by the Department based on documentation provided by
the design engineer, an instantaneous and totalizing flow meter equipped with
nonvolatile memory shall be installed on the discharge line of each well in
accordance with the manufacturer's specifications. Meters installed on systems
with variable frequency drives shall be capable of accurately reading the full
range of flow rates. An accessible check valve, which is not located in the
pump column, shall be installed in the discharge line of each well between the
pump and the shut-off valve. Additional check valves shall be located in the
pump column as necessary. (3-24-22)
05.
Well Vent. All wells shall
be vented, unless it can be demonstrated that the drawdown under maximum
pumping conditions will not exceed ten (10) feet. (3-24-22)
a. For wells not in a pump house, the open
end of the vent shall be screened with a twenty-four (24) mesh or similar
non-corrodible screen and terminated downward at least eighteen (18) inches
above the final ground surface. (3-24-22)
b. If the well is in a pump house, the open
end of the vent shall be screened with a twenty-four (24) mesh or similar
non-corrodible screen and must terminate at least twelve (12) inches above the
pump house floor. (3-24-22)
c.
Artesian wells equipped with pumps may need venting or an air valve as
determined by the Department. (3-24-22)
06.
Casings and Sanitary Well
Caps. The following requirements apply to well casings and sanitary
caps: (3-24-22)
a. Casings shall extend at
least eighteen (18) inches above the final ground surface. If the well is
located within a pump house, casings shall extend least twelve (12) inches
above the pump house floor. For a well located in an area subject to flooding,
the Department may require an extension of the casing above the one hundred
(100) year or highest known flood level, whichever is higher.
(3-24-22)
b. Wells shall be cased
and provided with an approved cap in such a manner that surface water cannot
enter the well. (3-24-22)
c. For
community water systems, a permanent means for measuring water level within the
casing must be provided. For other water systems, a temporary means to measure
water levels should be made available. All equipment required for conducting
water level measurements shall be purchased and made available to the water
system operator at the time the well is put into service. Where pneumatic or
electronic water level measuring equipment is used, it shall be made using
corrosion resistant materials attached firmly to the drop pipe or pump column
and in such a manner as to prevent entrance of foreign materials.
(3-24-22)
07.
Well
Houses. For regulatory purposes, a well house is considered a pump house
as defined in Section
003. Well houses must meet the
requirements for pump houses as set forth in Section
541. All above ground discharge
piping shall be contained in a well house or otherwise protected from freezing.
(3-24-22)
08.
Pitless
Adapters and Units. Pitless adapters or pitless units: (3-24-22)
a. Shall be of the type marked approved by
the National Sanitation Foundation or Pitless Adapter Division of the Water
Systems Council. (3-24-22)
b. Shall
be designed, constructed and installed to be watertight including the cap,
cover, casing extension and other attachments. (3-24-22)
c. Shall be field tested for leaks before
being put into service. The procedure outlined in "Manual of Individual and
Non-Public Water Supply Systems," referenced in Subsection
002.02, or other procedure
approved by the Department shall be followed. (3-24-22)
d. Pitless adapters with a two (2) inch or
smaller discharge line shall be provided with a swing joint outside the pitless
adapter unit to reduce strain, deformation, and possible leakage of the pitless
seal caused by settling soils in the trench. The orientation of swing joints
shall be such that any settling that occurs will tighten the threads. The hole
in the casing shall be cut with a saw rather than a torch with an opening large
enough to allow seating of gaskets. (3-24-22)
e. Shall be provided with a
contamination-proof entrance connection for electrical cable.
(3-24-22)
f. In the case of pitless
adapters: (3-24-22)
i. Threaded adapters shall
be installed by drilling a hole not more than one quarter (1/4) inch larger
than the outer diameter of the pitless shank. No torch-cut holes shall be
accepted. The orientation of swing joints shall be such that any settling that
occurs will tighten the threads. (3-24-22)
ii. The only field welding permitted will be
that needed to connect a pitless adapter to the casing.
(3-24-22)
g. In the case
of pitless units: (3-24-22)
i. Shall be
shop-fabricated from the point of connection with the well casing to the unit
cap or cover. (3-24-22)
ii. Shall
be constructed of materials and weight at least equivalent to and compatible
with the well casing. (3-24-22)
iii. Shall be threaded or welded to the well
casing. Threaded units shall be installed by drilling a hole not more than one
quarter (1/4) inch larger
than the outer diameter of the pitless shank. No torch-cut holes shall be
accepted. If the connection to the casing is by field weld, the shop-assembled
unit must be designed specifically for field welding to the casing.
(3-24-22)
iv. Shall terminate at
least eighteen (18) inches above final ground elevation or three (3) feet above
the 100-year flood level or the highest known flood elevation, whichever is
higher, or as otherwise approved by the Department. (3-24-22)
v. Shall be provided with access to disinfect
the well. (3-24-22)
vi. Shall have
field connection to the lateral discharge from the pitless unit of threaded,
flanged, or mechanical joint connection. (3-24-22)
h. After installation of a pitless adapter or
unit, the disturbed well seal shall be repaired or replaced to meet original
seal specifications unless otherwise proposed by the design engineer and
approved by the Department. The engineering proposal shall ensure that the
material surrounding the final seal is moisture controlled and compacted such
that it equals or exceeds the characteristics of the native soil prior to being
disturbed. (3-24-22)
09.
Wells Not Allowed in Pits. Wells shall not be located in pits.
Exceptions to this requirement will be granted by the Department if the well
was constructed prior to November 5, 1964, and the installation is constructed
or reconstructed in accordance with the requirements of the Department to
provide watertight construction of pit walls and floors, floor drains and
acceptable pit covers. (3-24-22)
10.
Discharge Pumps. Discharge
pumps shall be subject to the following requirements: (3-24-22)
a. Line shaft pumps shall. (3-24-22)
i. Have the casing firmly connected to the
pump structure or have the casing inserted into a recess extending at least
one-half (1/2) inch into the pump base. (3-24-22)
ii. Have the pump foundation and base
designed to prevent water from coming into contact with the joint.
(3-24-22)
iii. Use lubricants that
meet ANSI/NSF Standard 61. (3-24-22)
b. When a submersible pump is used: (3-24-22)
i. The top of the casing shall be effectively
sealed against the entrance of water under all conditions of vibration or
movement of conductors or cables. (3-24-22)
ii. The electrical cable shall be firmly
attached to the drop pipe at twenty-one (21) foot intervals or less, or at each
coupling or joint. (3-24-22)
