(1) Required
Treatment.
If properly developed, water from wells may be suitable for
culinary use without treatment. A determination concerning whether treatment
may be required can only be made after the source has been developed and
evaluated.
(2) Standby
Power.
Water suppliers shall assess the capability of their system
in the event of a power outage. If a community water system has no naturally
flowing water sources such as springs or flowing wells, one or more of the
system's sources shall be equipped for operation during power outages. In this
event:
(a) to ensure continuous
service when the primary power has been interrupted, a redundant power supply
shall be provided. A redundant power supply may include a transfer switch for
auxiliary power such as a generator or a power supply service with coverage
from two independent substations.
(b) when automatic pre-lubrication of pump
bearings is necessary, and an auxiliary power supply is provided, the
pre-lubrication line shall be provided with a valved by-pass around the
automatic control, or the automatic control shall be wired to the emergency
power source.
(3) The
Utah Division of Water Rights.
The Utah Division of Water Rights, State Engineer's Office,
regulates the drilling of water wells. Before the drilling of a well commences,
the well driller must receive a start card from the State Engineer's Office.
For public drinking water supply wells, Rule R655-4 applies and shall be
followed in addition to this rule.
(4) Source Protection.
Public drinking water systems are responsible for protecting
their sources from contamination. The selection of a well location shall only
be made after consideration of the requirements of Rule R309-600. Sources shall
be located in an area that will minimize threats from existing or potential
sources of pollution.
(a) A public
water system shall not develop a new groundwater source if existing sewer
infrastructure, including sewer lines, sewer laterals, or sewer maintenance
holes, exist within the boundaries of source protection zone one. For purposes
of this section, floor drains are not considered to be applicable sewer
infrastructure.
(b) The Director
may approve, as a permit order under Section
19-1-301.5, new groundwater
sources if the conditions identified in Subsection R309-600-13(3) are met and
each applicable sewer infrastructure, carrying wastewater from a building or
home to a public sewer or an onsite wastewater system, located within source
protection zone one is specially constructed as follows:
(i) Sewer lines shall be constructed to
remain watertight. The lines shall be deflection-tested in accordance with Rule
R317-3. The lines shall be video-inspected for any defect after completion of
construction and before being placed in service. The sewer pipe material shall
be:
(A) high density polyethylene (HDPE) pipe
with a PE3408 or PE4710 rating from the Plastic Pipe Institute and have a
Standard Dimension Ratio (SDR) of 17 or less, and each joint shall be
fusion-welded; or
(B) polyvinyl
chloride (PVC) pipe meeting AWWA Specification C900 or C905 and have a DR of 18
or less. PVC pipe shall be either restrained gasketed joints or shall be
fusion-welded. Solvent cement joints shall not be acceptable. The PVC pipe
shall be clearly identified when installed, by marking tape or other means as a
sanitary sewer line; or
(C) ductile
iron pipe with ceramic epoxy lining, polyethylene encasement, restrained
joints, and a minimum pressure class of 200.
(ii) Procedures for leakage tests shall be
named and comply with Rule R317-3.
(iii) Lateral to sewer line connection shall
be fusion-welded, shop-fabricated, or saddled with a mechanical clamping
watertight device designed for the specific pipe.
(iv) Inlet and outlet sewer pipes shall be
joined to a maintenance hole with a gasketed flexible watertight
connection.
(v) The sewer pipe
shall be laid with no greater than 2% deflection at any joint.
(vi) Backfill shall be compacted to not less
than 95% of maximum laboratory density as determined in accordance with ASTM
Standard D-690.
(vii) Sewer
maintenance hole shall meet Subsections R309-515-6(4)(b)(vii)(A) through (C)
requirements.
(A) The maintenance hole shall
be constructed of reinforced concrete, HDPE, or approved equivalent.
(B) Maintenance hole base and walls, up to a
point at least 12 inches above the top of the upper most sewer pipe entering
the maintenance hole, shall be fabricated in a single concrete pour without
joints.
(C) The maintenance hole
shall be air pressure tested after installation.
(5) Outline of Well
Approval Process.
(a) Well drilling shall not
begin until both of the following items are submitted and receive a favorable
review:
(i) a Preliminary Evaluation Report on
source protection issues as required by Section R309-600-13; and
(ii) engineering plans and specifications
governing the well drilling, prepared by a licensed well driller holding a
current Utah Well Drillers License or prepared, signed, and stamped by a
licensed professional engineer or professional geologist licensed to practice
in Utah.
(b) Inspection
of Well Sealing During Construction.
(i)
Authorized Individuals
(A) The following
individuals are authorized to witness the well sealing procedure for a public
drinking water well:
(I) an engineer or a
geologist from the Division of Drinking Water;
(II) a district engineer of the Department of
Environmental Quality;
(III) an
authorized representative of the Division of Water Rights; or
(IV) an individual having written
authorization from the Director and meeting the criteria in Subsection
R309-515-6(5)(b)(ii).
(B) During the well sealing, an individual,
who is authorized per Subsection R515-6(5)(b)(i)(A)(IV), shall present to the
well driller a copy of the authorization letter to witness a well sealing on
behalf of the Division of Drinking Water. A copy of this letter shall be
appended to the witness certification letter.
(C) At least three days before the
anticipated well sealing, the well driller shall arrange for an authorized
witness listed in Subsection R515-6(5)(b)(i)(A) to witness the procedure. See
Subsection R309-515-6(6).
(ii) Obtaining Authorization
(A) To be authorized per Subsection
R515-6(5)(b)(i)(A)(IV) to witness a well sealing procedure, an individual must
have no relationship to the driller or the well's owner. The individual must
have at least five years professional experience designing wells, supervising
well drilling, or other equivalent experience associated with well drilling or
well sealing that is acceptable to the Director.
(B) Individuals, desiring the Director's
authorization to witness a well sealing procedure, shall provide the following
information to the Director for review, signed and attesting to the correctness
of the information:
(I) a detailed description
of the applicant's experience with well drilling projects, including number of
years of experience and type of work. Three references confirming this
professional experience are required.
(II) evidence of licensure as a professional
engineer or professional geologist in Utah.
(III) no relationship may exist between a
person authorized to witness well sealings and a well driller that would serve
as the basis for suspicion of favoritism, leniency, or punitive action in the
performance of this task. Examples of such relationships would be family;
former long-term employment associations; business partnerships, either formal
or informal. The Director's decision, with right of appeal as provided in Rule
R305-7, shall be accepted relative to what constitutes a conflict of interest
or a relationship sufficient to disqualify an applicant from any witness
opportunities.
(IV) An
acknowledgment that the individual would not be acting as an agent or employee
of the State of Utah and any losses incurred while acting as a witness would
not be covered by governmental immunity or Utah's insurance.
(V) Willingness to follow established
protocols and attend such training events as may be required by the
Director.
(VI) Complete with a
minimum 75% passing grade, an examination on water well drilling rules, as
offered by the Division of Water Rights.
(C) The Director may rescind the
authorization if an individual fails to comply with the criteria or conditions
of the authorization.
(iii) Well Seal Certification The individual
witnessing the well sealing procedure shall provide a signed letter, including
the following information, to the Director within 30 days of the well sealing:
(A) certification that the well sealing
procedure met every requirement of Subsection R309-515-6(6)(i);
(B) the water right under which the well was
drilled and the well driller's license number;
(C) the public water system name, if
applicable;
(D) the latitude and
longitude of the well and method used for its determination;
(E) the well head's approximate
elevation;
(F) casing diameter,
length, and material;
(G) the size
of the annulus between the borehole and casing;
(H) a description of the sealing process
including the sealing material used, its volume, density, method of placement,
and depth from surface; and
(I) the
names and company affiliations of other individuals observing the sealing
procedure including, the well driller, the well owner, or a
consultant.
(c) After completion of the well drilling,
the following information shall be submitted and receive a favorable review
before water from the well can be introduced into a public water system:
(i) a copy of the Report of Well Driller as
required by the State Engineer's Office which is complete in every aspect and
has been stamped as received by the same;
(ii) a copy of the letter from the authorized
individual described in Subsection R309-515-6(5)(b), indicating inspection and
confirmation that the well was grouted in accordance with the well drilling
specifications and the requirements of this rule;
(iii) a copy of the aquifer drawdown test
data, as a minimum, including the yield versus drawdown test data, as described
in Subsection R309-515-6(10)(b) along with comments and interpretation by a
licensed professional engineer or licensed professional geologist of the
graphic drawdown information required by Subsection
R309-515-6(10)(b)(vi)(E);
(iv) a
copy of the chemical analyses required by Subsection R309-515-4(5);
(v) acceptable evidence that the water system
owner has a legal right to divert water for the proposed use from the well
source;
(vi) a copy of complete
plans and specifications prepared, signed, and stamped by a licensed
professional engineer covering the well housing, equipment, and diversion
piping necessary to introduce water from the well into the distribution system;
and
(vii) a bacteriological
analysis of water obtained from the well after installation of permanent
equipment, disinfection, and flushing.
(d) An Operation Permit shall be obtained in
accordance with Section R309-500-9 before any water from the well is introduced
into a public water system.
(6) Well Materials, Design, and Construction.
(a) ANSI/NSF Standards 60 and 61
Certification.
Interior surfaces must consist of products complying with
ANSI/NSF Standard 61. This requirement applies to drop pipes, well screens,
coatings, adhesives, solders, fluxes, pumps, switches, electrical wire,
sensors, and any other equipment or surfaces which may contact the drinking
water.
Substances introduced into the well during construction or
development shall be certified to comply with ANSI/NSF Standard 60. This
requirement applies to drilling fluids, including biocides, clay thinners,
defoamers, foamers, loss circulation materials, lubricants, oxygen scavengers,
viscosifiers, weighting agents, and regenerants.
(b) Permanent Steel Casing Pipe shall:
(i) be new single steel casing pipe meeting
AWWA Standard A-100, ASTM or API specifications and having a minimum weight and
thickness as given in Table 6 found in Subsection R655-4-11 (11.2.3);
(ii) have additional thickness and weight, if
minimum thickness is not considered sufficient to assure reasonable life
expectancy of the well;
(iii) be
capable of withstanding forces to which it is subjected;
(iv) be equipped with a drive shoe when
driven;
(v) have full
circumferential welds or threaded coupling joints; and
(vi) project at least 18 inches above the
anticipated final ground surface and at least 12 inches above the anticipated
pump house floor level. At sites subject to flooding, the top of the well
casing shall terminate at least three feet above the 100-year flood level or
the highest known flood elevation, whichever is higher.
(c) Non-Ferrous Casing Material.
The use of any non-ferrous material for a well casing shall
receive prior approval of the Director based on the ability of the material to
perform its desired function. Thermoplastic water well casing pipe shall meet
AWWA Standard A100-06 and shall bear the logo NSF-wc indicating compliance with
NSF Standard 14 for use as well casing.
(d) Disposal of Cuttings.
Cuttings and waste from well drilling operations shall not be
discharged into a waterway, lake, or reservoir. The rules of the Utah Division
of Water Quality must be observed with respect to these discharges.
(e) Packers.
Packers, if used, shall be of material that will not impart
taste, odor, toxic substances, or bacterial contamination to the well water.
Lead or partial lead packers are specifically prohibited.
(f) Screens.
The use of well screens is recommended where appropriate and,
if used, they shall:
(i) be
constructed of material resistant to damage by chemical action of groundwater
or cleaning operations;
(ii) have
size of openings based on sieve analysis of formations or gravel pack
materials;
(iii) have sufficient
diameter to provide adequate specific capacity and low aperture entrance
velocities;
(iv) be installed so
that the operating water level remains above the screen under any pumping
conditions; and
(v) be provided
with a bottom plate or wash-down bottom fitting of the same material as the
screen.
(g) Plumbness
and Alignment Requirements.
Every well shall be tested for plumbness and vertical
alignment in accordance with AWWA Standard A100. Plans and specifications
submitted for review shall:
(i) have
the test method and allowable tolerances clearly stated in the specifications;
and
(ii) clearly state any options
the design engineer may have if the well fails to meet the requirements.
Generally, wells may be accepted if the misalignment does not interfere with
the installation or operation of the pump or uniform placement of
grout.
(h) Casing
Perforations.
The placement of perforations in the well casing
shall:
(i) be located, as far as
practical, to permit the uniform collection of water around the circumference
of the well casing; and
(ii) be of
dimensions and size to restrain the water bearing soils from entrance into the
well.
(i) Well Sealing
Techniques and Requirements.
For each public drinking water well, the annulus between the
outermost well casing and the borehole wall shall be sealed with grout to a
depth of at least 100 feet below the ground surface unless an exception is
issued by the Director, see Subsection R309-500-4(1). If more than one casing
is used, including a conductor casing, the annulus between the outermost casing
and the next inner casing shall be sealed with grout, meeting the sealing
materials requirements of Subsection R309-515-6(i)(ii) or with a water tight
steel ring having a thickness equal to that of the permanent well casing and
continuously welded to both casings. If a public drinking water well will be
equipped with a pitless adapter or unit, a well seal shall be installed to a
minimum depth of 110 feet to account for the top 10 feet of compromised seal
interval.
The following shall apply to each drinking water well:
(i) Consideration During Well Construction.
(A) Sufficient annular opening shall be
provided to permit a minimum of two inches of grout between the outermost
permanent casing and the drilled hole, taking into consideration any joint
couplings.
(B) The casing must be
placed to permit unobstructed flow and uniform thickness of grout.
(ii) Sealing Materials.
(A) Neat Cement Grout.
Cement, conforming to ASTM Standard C150, and water, with no
more than six gallons of water per sack of cement, shall be used for two-inch
openings. Additives may be used to increase fluidity subject to approval by the
Director.
(B) Concrete
Grout.
Equal parts of cement conforming to ASTM Standard C150, and
sand, with no more than six gallons of water per sack of cement, may be used
for openings larger than two inches.
(C) Clay Seal.
Where an annular opening greater than six inches is
available, a seal of swelling bentonite meeting the requirements of Subsection
R655-4-11 (11.4.2) may be used when approved by the Director.
(iii) Application.
(A) When the annular opening is less than
four inches, grout shall be installed under pressure using a positive
displacement grout pump, from the bottom of the annular opening to be
filled.
(B) When the annular
opening is four or more inches and 100 feet or less in depth, and concrete
grout is used, it may be placed by gravity through a grout pipe installed to
the bottom of the annular opening in one continuous operation until the annular
opening is filled.
(C) Every
temporary construction casing shall be removed before or during the well
sealing operation. Any exceptions shall be approved by the State Engineer's
Office, and evidence of State Engineer's Office's approval shall be submitted
to the Director, See Subsection R655-4-11 (11.4.3.1) for conditions concerning
leaving temporary surface casing in place. A temporary construction casing is a
casing not intended to be part of the permanent well.
(D) When a well in a protected aquifer
classification is desired, the grout seal shall extend from the ground surface
down to at least 100 feet below the surface, and through the protective clay
layer. See Subsection R309-600-6(23).
(E) After cement grouting is applied, work on
the well shall be discontinued until the cement or concrete grout has properly
set, usually a period of 72 hours.
(j) Water Entered into Well During
Construction.
Any water entering a well during construction shall not be
contaminated and should be obtained from a chlorinated municipal system. Where
this is not possible, the water must be treated to produce a 100 mg/l free
chlorine residual in accordance with Subsection R655-4-11 (11.6.5).
(k) Gravel Pack Wells.
The following shall apply to gravel packed wells:
(i) the gravel pack material shall be of
well-rounded particles, at least 90% siliceous material, no more than 5% acid
solubility, smooth and uniform, free of foreign material, properly sized,
washed, and then disinfected immediately before or during placement;
(ii) the gravel pack shall be placed in one
uniform continuous operation;
(iii)
refill pipes, when used, shall be Schedule 40 steel pipe incorporated within
the pump foundation and terminated with screwed or welded caps at least 12
inches above the pump house floor or concrete apron;
(iv) refill pipes located in the grouted
annular opening shall be surrounded by a minimum of 1.5 inches of
grout;
(v) protection shall be
provided to prevent leakage of grout into the gravel pack or screen;
and
(vi) any casings not withdrawn
entirely shall meet requirements of Subsection R309-515-6(6)(b) or Subsection
R309-515-6(6)(c).
(7) Well Development.
(a) Every well shall be developed to remove
the native silts and clays, drilling mud, or finer fraction of the gravel
pack.
(b) Development should
continue until the maximum specific capacity is obtained from the completed
well.
(c) Where chemical
conditioning is required, the specifications shall include provisions for the
method, equipment, chemicals, testing for residual chemicals, and disposal of
waste and inhibitors.
(d) Where
blasting procedures may be used, the specifications shall include the
provisions for blasting and cleaning. Special attention shall be given to
assure that the grouting and casing are not damaged by the blasting.
(8) Capping Requirements.
(a) The well shall be securely capped in
accordance with Subsection R655-4-14 (14.1) until permanent equipment can be
installed.
(b) Continually, during
the progress of work, the contractor shall provide protection to prevent
tampering with the well or entrance of foreign materials.
(9) Well Abandonment.
(a) Test wells and groundwater sources, which
will be permanently abandoned shall be abandoned in accordance with Section
R655-4-14.
(b) Wells to be
abandoned shall be sealed to prevent undesirable exchange of water from one
aquifer to another. Preference shall be given to using a neat cement grout.
Where fill materials are used, which are other than cement grout or concrete,
they shall be disinfected and free of foreign materials. When an abandoned well
is filled with cementgrout or concrete, these materials shall be applied to the
well- hole through a pipe, tremie, or bailer.
(10) Well Assessment.
(a) Step Drawdown Test.
Preliminary to the constant-rate test required in Subsection
R309-515-6(10)(b), it is recommended that a stepdrawdown test, which is uniform
increases in pumping rates over uniform time intervals with single drawdown
measurements taken at the end of the intervals, be conducted to determine the
maximum pumping rate for the desired intake setting.
(b) Constant-Rate Test.
A constant-rate yield and drawdown test shall:
(i) be performed on every production well
after well development and before placement of the permanent pump;
(ii) have the test methods clearly indicated
in the specifications;
(iii) have a
test pump with sufficient capacity that when pumped against the maximum
anticipated drawdown, it will be capable of pumping more than the desired
design discharge rate;
(iv) provide
for continuous pumping for at least 24 hours or until stabilized drawdown has
continued for at least six hours when test pumped at a constant-rate equal to
the desired design discharge rate;
(v) provide the following data:
(A) capacity vs. head characteristics for the
test pump, manufacturer's pump curve;
(B) static water level, in feet to the
nearest tenth, as measured from an identified datum; usually the top of
casing;
(C) depth of test pump
intake; and
(D) time and date of
starting and ending test;
(vi) For the constant-rate test, provide the
following at time intervals sufficient for at least ten essentially uniform
intervals for each log cycle of the graphic evaluation required in Subsection
R309-515-6(10)(b)(vi)(A) through Subsection R309-515-6(10)(b)(vi)(E):
(A) record the time since starting test in
minutes;
(B) record the pumping
rate;
(C) record the pumping water
level, in feet to the nearest tenth, as measured from the same datum used for
the static water level;
(D) record
the drawdown, which is the pumping water level minus static water level in feet
to the nearest tenth;
(E) provide
graphic evaluation on semi-logarithmic graph paper by plotting the drawdown
measurements on the arithmetic scale at locations corresponding to time since
starting test on the logarithmic scale; and
(vii) Immediately after termination of the
constant-rate test, and until there are no changes in depth to water level
measurements for at least six hours, record the following at time intervals
similar to those used during the constant-rate pump test:
(A) time since stopping pump test in
minutes;
(B) depth to water level,
in feet to the nearest tenth, as measured from the same datum used for the
pumping water level.
(c) Safe Yield.
If the aquifer drawdown test data show that the drawdown has
stabilized, the Director will consider 2/3 of the pumping rate used in the
constant-rate test as the safe yield of the well. The safe yield is used to
determine the number of permanent residential connections or ERCs that a well
source can support.
(11) Well Disinfection.
Every new, modified, or reconditioned well including pumping
equipment shall be disinfected before being placed into service for drinking
water use. These shall be disinfected according to AWWA Standards C654-03 and
A100-06 as modified to incorporate the following as a minimum standard:
(a) the well shall be disinfected with a
chlorine solution of sufficient volume and strength and so applied that a
concentration of at least 50 parts per million is obtained in every part of the
well and the equipment installed in the well. This solution shall remain in the
well for a period of at least eight hours; and
(b) a satisfactory bacteriologic water sample
analysis shall be obtained the use of water from the well in a public water
system.
(12) Well
Equipping.
(a) Naturally Flowing Wells.
Naturally flowing wells shall:
(i) have the discharge controlled by
valves;
(ii) be provided with
permanent casing and sealed by grout; and
(iii) if erosion of the confining bed
adjacent to the well appears likely, special protective construction may be
required by the Director.
(b) Well Pumps.
(i) The design discharge rate of the well
pump shall not exceed the rate used during the constant-rate aquifer drawdown
test.
(ii) Wells equipped with line
shaft pumps shall:
(A) have the casing firmly
connected to the pump structure or have the casing inserted into the recess
extending at least 0.5 inches into the pump base;
(B) have the pump foundation and base
designed to prevent fluids from coming into contact with joints between the
pump base and the casing;
(C) be
designed such that the intake of the well pump is at least ten feet below the
maximum anticipated drawdown elevation; and
(D) avoid the use of oil lubrication for
pumps with intake screens set at depths less than 400 feet. See Subsection
R309-105-10(7) and R309-515-8(2) for additional requirements of
lubricants).
(iii) Where
a submersible pump is used:
(A) the top of the
casing shall be effectively sealed against the entrance of water under any
condition of vibration or movement of conductors or cables;
(B) the electrical cable shall be firmly
attached to the riser pipe at 20-foot intervals or less; and
(C) the intake of the well pump must be at
least ten feet below the maximum anticipated drawdown elevation.
(c) Pitless Well Units
and Adapters.
If the excavation surrounding the well casing allowing
installation of the pitless unit compromises the surface seal, the competency
of the surface seal shall be restored. Torch-cut holes in the well casing shall
be neat lines closely following the outline of the pitless adapter and entirely
filled with a competent weld with burrs and fins removed before the
installation of the pitless unit and adapter.
Pitless well units and adapters shall:
(i) be used to make a connection to a water
well casing that is made below the ground. A below-the-ground connection shall
not be submerged in water during installation;
(ii) terminate at least 18 inches above final
ground elevation or three feet above the highest known flood elevation,
whichever is greater;
(iii) contain
a label or have a certification indicating compliance with the Water Systems
Council Pitless Adapter Standard ( PA S -97);
(iv) have suitable access to the interior of
the casing to disinfect the well;
(v) have a suitable sanitary seal or cover at
the upper terminal of the casing that will prevent the entrance of any fluids
or contamination, especially at the connection point of the electrical
cables;
(vi) have suitable access
so that measurements of static and pumped water levels in the well can be
obtained;
(vii) allow at least one
check valve within the well casing;
(viii) be furnished with a cover that is
lockable or otherwise protected against vandalism or sabotage;
(ix) be shop-fabricated from the point of
connection with the well casing to the unit cap or cover;
(x) be of watertight construction
throughout;
(xi) be constructed of
materials at least equivalent to and having wall thickness compatible to the
casing;
(xii) have field connection
to the lateral discharge from the pitless unit of threaded, flanged, or
mechanical joint connection;
(xiii)
be threaded or welded to the well casing. If the connection to the casing is by
field weld, the shop-assembled unit must be designed specifically for field
welding to the casing. The only field welding permitted on the pitless unit is
to connect the pitless unit to the casing; and
(xiv) have an inside diameter as great as
that of the well casing, up to and including casing diameters of 12 inches, to
facilitate work and repair on the well, pump, or well screen.
(d) Well Discharge Piping. The
discharge piping shall:
(i) be designed so
that the friction loss will be low;
(ii) have control valves and appurtenances
located above the pump house floor when an aboveground discharge is
provided;
(iii) be protected
against the entrance of contamination;
(iv) be equipped with a smooth-nosed sampling
tap, a check valve, a pressure gauge, a means of measuring flow, and a shut-off
valve. With the smooth-nosed sampling tap being the first item from the well
head and the shut-off valve as the last item, unless it is a naturally flowing
well which may need an alternative design;
(v) where a well pumps directly into a
distribution system, be equipped with an air release vacuum relief valve
located upstream from the check valve, with exhaust or relief piping
terminating in a down-turned position at least six inches above the well house
floor and covered with a No. 14 mesh corrosion resistant screen. An air release
vacuum relief valve is not required if the specific proposed well head valve
and piping design includes provisions for pumping to waste the entirety of
trapped air before water is introduced into the distribution system;
(vi) have every exposed piping valve and
appurtenance protected against physical damage and freezing;
(vii) be properly anchored to prevent
movement;
(viii) be properly
protected against surge or water hammer; and
(ix) if a pump-to-waste line exists, it shall
not be connected to a sewer or storm drain without a minimum 12-inch clearance
to the flood rim, and the discharge end of the pump-to-waste line shall be
down-turned and covered with a No. 4 mesh corrosion resistant screen, refer to
Subsection R309-545-10(1).
(e) Water Level Measurement.
(i) Provisions shall be made to permit
periodic measurement of water levels in the completed well.
(ii) Where permanent water level measuring
equipment is installed, it shall be made using corrosion resistant materials
attached firmly to the drop pipe or pump column and installed to prevent
entrance of foreign materials.
(f) Observation Wells.
Observation wells shall be:
(i) constructed in accordance with the
requirements for permanent wells if they are to remain in service after
completion of a water supply well; and
(ii) protected at the upper terminal to
preclude entrance of foreign materials.
(g) Electrical Protection.
Sufficient electrical controls shall be placed on every pump
motor to eliminate electrical problems due to phase shifts, surges, or
lightning.
(13)
Well House Construction.
The use of a well house is strongly recommended, particularly
in installations utilizing above ground motors.
Well pump houses shall conform to the following:
(a) Casing Projection Above Floor.
The permanent casing for any groundwater well shall project
at least 12 inches above the pump house floor or concrete apron surface and at
least 18 inches above the final ground surface. However, casings terminated in
underground vaults may be permitted if the vault is provided with a
drain-to-daylight sized to handle more than the well flow and surface runoff
and is directed away from the vault access.
(b) Floor Drain.
Where a well house is constructed, the floor surface shall be
at least six inches above the final ground elevation and shall be sloped to
provide drainage. A drain-to-daylight shall be provided unless highly
impractical.
(c) Earth
Berm.
Sites subject to flooding shall be provided with an earth
berm terminating at an elevation at least two feet above the highest known
flood elevation or other suitable protection as determined by the
Director.
(d) Well Casing
Termination at Flood Sites.
The top of the well casing at sites subject to flooding shall
terminate at least three feet above the 100-year flood level or the highest
known flood elevation, whichever is higher, refer to Subsection
R309-515-6(6)(b)(vi).
(e)
Miscellaneous.
The well house shall be ventilated, heated, and lighted in
such a manner as to assure adequate operation of the equipment.
(f) Fencing.
Where necessary to protect the quality of the well water, the
Director may require that certain wells be fenced in a manner similar to
fencing required around spring areas.
(g) Access.
An access shall be provided either through the well house
roof or sidewalls in the event the pump must be pulled for replacement or
servicing the well.
