[Ord. No. 06-05-01 §709.1, 5-9-2006]
Unless the context specifically indicates otherwise, the meanings
of terms used in this Article shall be as follows:
That part of the lowest horizontal piping of a drainage system
which receives the discharge from soil, waste and other drainage pipes
inside the walls of the building and conveys it to the building sewer,
beginning five (5) feet (1.5 meters) outside the inner face of the
building wall.
The extension from the building drain to the public sewer
or other place of disposal.
The City of Fair Grove, Missouri.
A sewer receiving both surface runoff and sewage.
Any person, firm, partnership or corporation occupying any
building or structure which is connected to the City sewer system,
the principal use of which is for engaging in commerce or trade and
having a financial profit as the primary aim. Provided however, that
schools shall be considered as a "commercial user".
The City Health Department or the authorized Health Officer
Representative.
The sketch drawing with all calculations and alterations.
A condition which presents an immediate danger to public
health requiring immediate correction without the necessary time to
apply for the required permit as set forth herein.
Any condition which is known to cause disease or harm to
a person, community or the environment now or in the future.
The City Health Officer or an authorized representative.
Any non-governmental user of the City's wastewater works
that discharges wastes other than primarily domestic wastes or wastes
from sanitary convenience.
The liquid wastes from industrial manufacturing processes,
trade or business as distinct from sanitary sewage.
The person or persons duly authorized by the City, to inspect
and approve the installations of building sewers and their connection.
The State agency having jurisdiction over community sewer
systems, including regulations issued by the agency.
Any outlet into a watercourse, pond, ditch, lake or other
body of surface or groundwater.
A written authorization issued by the City which authorizes
the permittee to construct, install, modify or operate a wastewater
facility as set forth in this Chapter
Any individual, firm, company, association, society, corporation
or group.
A sewer in which all owners of abutting properties have equal
rights and is controlled by public authority.
Any person occupying any building or structure which is connected
to the City sewer system, the principal use of which is for domestic
dwelling purposes for any person.
A sewer which carries sewage and to which storm, surface
and ground waters are not intentionally admitted.
A combination of the water carried wastes from residences,
business buildings, institutions and industrial establishments, together
with such ground, surface and stormwaters as may be present.
Any arrangement of devices and structures used for treating
sewage.
All facilities for collecting, pumping, treating and disposing
of sewage.
A pipe or conduit for carrying sewage.
Is mandatory; MAY: is permissive.
A written order issued by the City or designated representative
to stop all construction, installation, modification or operation
of a wastewater treatment system.
A sewer which carries storm and surface waters and drainage,
but excludes sewage and industrial wastes other than unpolluted cooling
water.
A channel in which a flow of water occurs, either continuously
or intermittently.
[Ord. No. 06-05-01 §709.2, 5-9-2006]
A.
Use Of Public Sewer Required. It shall be unlawful for any
person to place, deposit or permit to be deposited in any unsanitary
manner upon public or private property within the City or in any area
under the jurisdiction of said City, any human or animal excrement,
garbage or other objectionable waste which ordinarily would be regarded
as sewage or industrial wastes.
B.
Discharge Of Polluted Waste Prohibited. It shall be unlawful
to discharge to any natural outlet within said City or in any area
under the jurisdiction of said City, any sanitary sewage, industrial
wastes or other polluted waters, except where suitable treatment has
been provided in accordance with subsequent provisions of this Chapter.
C.
Construction Of Septic Tanks Unlawful When Sewer Available. Except as hereinafter provided, it shall be unlawful to construct
or maintain any privy, privy vault, septic tank, cesspool or other
facility intended or used for the disposal of sewage.
D.
Required Distance For Sewer Connection. The owner of all
houses, buildings or properties used for human occupancy, employment,
recreation or other purposes, situated within the City and abutting
on any street, alley or right-of-way in which there is now located
or may in the future be located a public sanitary or combined sewer
of the City, is hereby required at his/her expense to install suitable
toilet facilities therein and to connect such facilities directly
with the public sewer in accordance with the provisions of this Article
within ninety (90) days after date of official notice to do so, provided
said public sewer is within two hundred (200) feet of the nearest
structure corner.
E.
New Construction — Sewer Required.
1.
All new development within the City shall be connected to the public
sanitary sewer system prior to the issuance of any occupancy permits
in accordance with the provisions of this Chapter. This provision
is also applicable to existing structures that convert to one for
the human employment, recreation or other purposes within the City.
2.
All sanitary sewer extensions, pump station, appurtenances and all
collection and treatment systems shall be designed and constructed
in accordance with the provisions of this Article, the most current
regulation of the Missouri Department of Natural Resources' rules
and regulations and the Statutes of the State of Missouri.
F.
Permit Required For Building Sewers And Connections. No
person shall uncover, make any connections with or opening into, use,
alter or disturb any public sewer or appurtenance thereof without
first obtaining a written permit from the City.
G.
Responsibility For Installation And Connection Costs. All
costs and expense incidental to the installation and connection to
the building sewer shall be borne by the owner including, but not
limited to, sewer main damage; street, drainage and sidewalk damage,
other utility damage. The owner or the person installing the building
for said owner shall indemnify said City from any loss or damage that
may directly or indirectly be occasioned by said installation.
H.
Separate Sewer For Each Building; Exception. A separate
and independent building sewer shall be provided for every building;
except where one (1) building stands at the rear of another on an
interior lot and no private sewer is available or can be constructed
to the rear building through an adjoining alley, court, yard or driveway,
the building sewer from the front building may be extended to the
rear building and the whole considered as one (1) building sewer.
Other exceptions will be allowed only by special permission granted
by the City.
I.
Requirements For Old Building Sewers. Old building sewers
may be used in connection with new buildings only when they are found,
on examination and test by the City Inspector, to meet all requirements
of this Section.
[Ord. No. 06-05-01 §709.3, 5-9-2006]
A.
Connection Standards To Public Sewer. All new connections
to the Fair Grove sewer system from newly constructed or converted
structures shall be in accordance with the connection requirements
set forth herein.
1.
The size, slope, alignment, material of construction of a building
sewer and the methods to be used in excavating, placing of the pipe,
jointing, testing and backfilling the trench, shall all conform to
the requirements of the Building and Plumbing Code or other applicable
rules and regulations of the City. In the absence of code provisions
or in application thereof, the material and procedures set forth in
appropriate specifications of the A.S.T.M. and W.P.C.F. Manual of
Practice No. 9 shall apply.
2.
The building sewer shall be constructed of pipe and fittings meeting
the current A.S.T.M. Specifications. If the building sewer is installed
in filled or unstable ground, the building sewer shall be of cast
iron soil pipe. PVC schedule 40 pipe may be used in all other locations.
3.
All joints and connections shall be made gastight and watertight.
Connections between pipe of different materials shall be made by adapters
specifically designed for that purpose and shall provide a gas and
watertight connection.
4.
Before joining the pipe in the trench, the bell and spigot surfaces
shall be wiped free of dirt or other foreign matter. A lubricant or
sealer as recommended by the pipe manufacturer shall be applied to
the bell and spigot mating surfaces just before they are joined together.
5.
The spigot end shall be positioned into the bell end of the pipe
previously laid and shall then be shoved home to compress the joint
and to assure a tight fit between the interfaces. Solvent welds shall
be made using materials specifically designed for the pipe used. "All
purpose glues" shall not be used.
6.
The size and minimum slope of the building sewer shall be as provided
herein, subject to the review and approval of the City Inspector but
in no event shall the pipe inside diameter be less than four (4) inches.
The following table shall be used to determine the building sewer
line size requirements.
|
INSIDE DIAMETER
|
MAXIMUM DISCHARGE FLOW RATE
|
MINIMUM GRADE
| |
|---|---|---|---|
|
4 inches
|
35 gallons/minute
|
1.0%
| |
|
6 inches
|
90 gallons/minute
|
0.6%
| |
|
8 inches
|
150 gallons/minute
|
0.4%
|
7.
The building sewer shall be operated and maintained by the property
owner.
B.
Elevation Of Building Sewer.
1.
Whenever possible, the building sewer shall be brought to the building
at an elevation below the basement floor. In all buildings in which
any building drain is too low to permit gravity flow to the public
sewer, sanitary sewage carried by such building drain shall be lifted
by an approved means and discharged to the building sewer. Any such
pumping equipment shall be operated and maintained by the property
owner.
2.
The depth shall be sufficient to afford protection from frost with
a minimum of twenty-four (24) inches including under ditches. All
excavations required for the installation of a building sewer shall
be open trench work unless otherwise approved by the said inspector.
Pipe laying and backfill shall be performed in accordance with ASTM
Specification D2321, except that no backfill shall be placed until
the work has been inspected by the inspector or his/her representative.
Installation and backfill shall be in accordance with this Section.
3.
The building sewer line shall be placed on bedding material with
a minimum thickness of three (3) inches. The bedding material shall
be used to provide a uniform bearing area for the pipe and joints.
Bedding material consist of crushed stone ranging in size from a maximum
one-half (½) inch diameter to a minimum size which is retained
on a No. 4 sieve. Over excavation of the trench shall be backfilled
to the proper grade by the use of bedding materials. Bedding material
shall extend to a minimum of (16) inches over the top of the pipe.
4.
In all buildings in which any building drain is too low to permit
gravity flow to the public sewer, sanitary sewage carried by such
drains shall be lifted by approved artificial means and discharged
to the building sewer. No water operated sewage ejector shall be used.
5.
The connection of the building sewer into the public sewer shall
be made at the "T" or "Y" branch designated for that property, if
such branch is available at a suitable location. Any connection not
made at the designated "T" or "Y" branch in the main sewer, shall
be made only as directed by the said inspector using a tapping tool,
saddle type "T" or "Y" with epoxy cement used to fix the fitting to
the pipe.
6.
Outside the foundation, the building sewer line shall have a cleanout
installed complete with a watertight plug installed at the ground
surface. An additional cleanout shall be placed at each bend in direction
greater than forty-five degrees (45°) and as required to achieve
a maximum spacing of one hundred (100) feet between clean outs. The
alignment of the building sewer line shall be straight with bends
made using fittings designed for the degree of bend required. Connections
between dissimilar pipe materials shall be made using a flexible watertight
coupling.
C.
Surface Runoff And Groundwater Draining To Sanitary Sewer. No person shall make connection of roof downspouts, exterior foundation
drains, areaway drains or other sources of surface runoff or groundwater
to a building sewer or building drain which in turn is connected directly
or indirectly to a public sanitary sewer.
D.
Inspection Required For Sewer Connection. The applicant
for the building sewer permit shall notify the City Inspector when
the building sewer is ready for inspection and connection to the public
sewer. The connection shall be made under the supervision of the City
Inspector or his/her representative. The inspection shall be made
within forty-eight (48) business hours of the receipt of the notice.
E.
Excavations To Be Guarded And Restored. All excavations
for building sewer installations shall be adequately guarded with
barricades and lights so as to protect the public from hazard. Streets,
sidewalks, parkways and other public property disturbed in the course
of the work shall be restored in a manner satisfactory to the City.
[Ord. No. 06-05-01 §709.4, 5-9-2006]
Grease, oil and sand interceptors shall be provided for all
restaurants, cafeterias whether public or privately run, vehicle wash
and when in the opinion of the City Inspector they are necessary for
the proper handling of liquid wastes containing grease in excessive
amounts or any flammable wastes, sand or other harmful ingredients;
except such interceptors shall not be required for private living
quarters or dwelling units. All interceptors shall be of a type and
capacity approved by the City Inspector and shall be located as to
be readily and easily accessible for cleaning and inspection.
[Ord. No. 06-05-01 §709.5, 5-9-2006]
Where preliminary treatment or flow-equalizing facilities are
provided for any waters or wastes, they shall be maintained continuously
in satisfactory and effective operation by the owner at his/her expense.
[Ord. No. 06-05-01 §709.6, 5-9-2006]
When required by the City Inspector, the owner of any property
serviced by a building sewer carrying industrial wastes shall install
a suitable control manhole together with such necessary meters and
other appurtenances in the building sewer to facilitate observation,
sampling and measurement of the wastes. Such manhole, when required,
shall be accessibly and safely located and shall be constructed in
accordance with plans approved by the City Inspector. The manhole
shall be installed by the owner at his/her expense and shall be maintained
by him/her so as to be safe and accessible at all times.
[Ord. No. 06-05-01 §709.7, 5-9-2006]
All commercial and industrial pretreatment facilities are required
to submit an engineering drawing for review and approval by the City
Inspector.
[Ord. No. 06-05-01 §709.8, 5-9-2006]
A.
Persons Liable. Any person, firm, partnership or corporation who fails to comply with or violates any of the regulations of this Article or other applicable provisions of this Chapter may be held responsible for the violation and be subject to the penalties and remedies as provided in Article III, Section 405.120 and as provided herein.
B.
Destruction Or Damage To System. No unauthorized person
shall maliciously, willfully or negligently break, damage, destroy,
uncover, deface or tamper with any structure, appurtenance or equipment
which is part of the sewage works. Any person violating this provision
shall be subject to immediate arrest.
C.
Suspension Of Business License. Any person that holds a
business license in the City of Fair Grove shall have his/her license
suspended immediately by the City Clerk until the next regular meeting
whenever the second (2nd) or additional, citations have been issued
to said individual holding the business license. The Board of Aldermen
shall take actions at said meeting regarding said business license
and set a hearing date at that time, if necessary.
[Ord. No. 06-05-01 §709.9, 5-9-2006]
A.
Applicability. These regulations apply to all wastewater
treatment systems except for wastewater treatment systems connected
to the sewage systems operated by the City.
B.
Prohibitions. No person shall:
1.
Construct, install, modify or operate any private sewage or wastewater
treatment system within the City limits without approval by the Board
of Aldermen.
2.
Fail to comply with a stop order issued pursuant to this Chapter.
3.
Modify or operate any sewage or wastewater treatment system or any
"on-site sewage disposal system" as defined in Chapter 701, RSMo.,
in violation of the provisions of Chapter 701, RSMo., or in violation
of any construction, modification or operation permit issued by the
Missouri Department of Natural Resources or any other Federal or State
agency.
C.
Inspection Of Installation To Be Made Before Covering. Permit
for a private sewage disposal system shall not become effective until
the installation is completed to the satisfaction of the City Inspector.
He/she shall be allowed to inspect the work at any stage of construction
and, in any event, the applicant for the permit shall notify the City
Inspector when the work is ready for final inspection and before any
underground portions are covered. The inspection shall be made within
forty-eight (48) business hours of the receipt of notice by the City
Inspector.
D.
Installation Shall Comply With Recommendations. The type,
capacities, location and layout of a private sewage disposal system
shall comply with all recommendations of the Missouri Department of
Natural Resources. No permit shall be issued for any private sewage
disposal system employing subsurface soil absorption facilities where
the area of the lot is less than fifteen thousand (15,000) square
feet. No septic tank or cesspool shall be permitted to discharge to
any natural outlet.
E.
Connection Required Upon Availability Of Sewer. At such
time as a public sewer becomes available to a property served by a
private sewage disposal system, as provided in this Section, a direct
connection shall be made to the public sewer in compliance with this
Article within ninety (90) days after notice from the City. Any septic
tanks, cesspools and similar private sewage disposal facilities shall
be abandoned and cleaned of sludge and filled with clean bankrun gravel
or dirt as determined suitable by the City Inspector.
F.
Maintenance Of Private Sewage Facilities. The owner shall
operate and maintain the private sewage disposal facilities in a sanitary
manner at all times, at no expense to the City.
G.
Statements Not To Interfere With Additional Requirements. No statement contained in this Section shall be construed to interfere
with any additional requirements that may be imposed by the Health
Officer or City Inspector.
H.
Construction Permit Required.
1.
Any person engaged in the construction, installation or renovation
of any wastewater treatment system shall obtain a construction permit
from the City.
2.
Applicant shall provide the following information:
a.
Legal description of the property to the nearest one-quarter (¼),
one-quarter (¼) section.
b.
Individual systems. A completed site evaluation
information and sketch for the individual sewer treatment systems.
c.
Commercial systems with a maximum daily flow of less than
three thousand (3,000) GPD. A completed site evaluation information
and detailed design of the proposed system.
d.
Commercial systems with a maximum daily flow of greater than
three thousand (3,000) GPD. A letter of approval for the
construction issued by Missouri Department of Natural Resources and
a copy of the engineering plans as approved by the Missouri Department
of Natural Resources.
e.
Name of the installer and signature of the installer.
3.
Individual sewage treatment systems shall be approved as to type,
design and capacity by the City prior to issuance of the construction
permit, in accordance with the current construction standards of the
Missouri Department of Health, in particular 10 CSR 20-8.021 of the
DNR.
5.
The permit application shall be signed by the owner of the property
on which the system is to be installed or by his/her legally authorized
representative.
6.
Any applicant knowingly providing false information on the application
shall be subject to termination of the permit.
I.
Powers And Authority Of Inspectors. The City Inspector,
City Health Officer or designated representative, bearing proper credentials
and identification, shall be permitted to enter all properties for
the purpose of inspection, observation, measurement, sampling and
testing in accordance with the provisions of this Section.
J.
Appeals.
1.
Any person aggrieved by any decision of the City regarding Wastewater
Treatment Systems may appeal to the Board of Aldermen by filing a
written application with the City Clerk within thirty (30) days after
being notified of the decision which is the subject of the appeal.
2.
The Board of Aldermen shall schedule a hearing on appeal and shall
give the person notice of the date of hearing at least ten (10) days
prior to the hearing date and give the person reasonable opportunity
to be heard.
3.
Appeal hearings to the Board of Aldermen shall be conducted in accordance
with the Board of Aldermen's adopted rules and procedures.
[Ord. No. 06-05-01 §709.10, 5-9-2006]
A.
All
applicants for new street connections to the sewer (hereinafter new
service) shall be subject to all rules and regulations heretofore
or hereafter adopted or promulgated by the City and to all applicable
ordinances or provisions thereof of the City, which may be now or
hereafter in force.
B.
All
applicants for new service shall sign in advance at time of planning
or start of construction such form or service contract as may be acceptable
to City.
C.
City
will not supply permanent service until:
D.
All
customers desiring new service shall make application for service
and enter into such contracts for service as may from time to time
be required by the City. All applications for new service shall be
made in the true name of the customer actually to receive and use
such service, unless otherwise permitted by the City and the use of
a fictitious name by the prospective customer shall be sufficient
reason for refusal or termination of service.
E.
Any
change in the identity of the customer of record at the premises shall
require a new application and the City may discontinue the service
supply until such new application has been made and accepted by the
City. In the event customer fails to make the required application
for services, the head of the household receiving, using and benefiting
from such service, shall be subject to all ordinances, rules and regulations
and tariffs and liable for all charges for service rendered.
F.
A sewer
connection customer must be at the residence or have an authorized
representative at the residence, at the time the sewer is connected.
[Ord. No. 06-05-01 §709.11, 5-9-2006]
A.
General Requirements.
1.
The specification for the construction of sewer lines, pumping stations,
auxiliary power generator and force mains of the sewer works of the
City shall be as set forth in this Section.
2.
Sewer lines shall be designed by an engineer and submitted for approval
to the City and the MoDNR. The design engineer shall certify the sewer
lines were constructed and tested in accordance with the approved
plans and specifications and submit to MoDNR forms required to begin
use of the completed facilities.
3.
The customer who requests sanitary sewer service which requires extension
of the sewer lines of the City shall request and may be granted the
right to make such extension by the City. A building sewer shall not
cross through or past another property other than a public right-of-way
for connection to sewer.
4.
The services of an experienced contractor shall install the sewage
works in accordance with the approved plans and specifications. The
contractor shall give the City at least forty-eight (48) hours' notice
of intent to commence work. The contractor shall provide a Performance
Bond in the City's name to assure completion of the work. No work
shall begin until a proper MoDNR construction permit is delivered
to the City.
5.
The engineer shall prepare the plans in accordance with the following
minimum conditions.
a.
Minimum line size shall be eight (8) inches. Sewage flows shall assume
a minimum of two and one-half (2.5) persons per home and one hundred
(100) gallons per person per day.
b.
The design shall conform to the Missouri Department of Natural Resources
rules published as "Division 20, Chapter 8, "Design of Sewage Works",
latest edition.
c.
Gravity flow sewers shall be designed and connected to the existing
City sewers. Where existing City sewers are not available for connection
by gravity flows, a sewage pumping station and force main shall be
installed. The required sewage works shall meet all the requirements
of the Missouri Department of Natural Resources and the City Inspector.
Sewer flow line depth shall not exceed eight (8) feet unless approved
by the City.
d.
The design shall include building sewer connection, tee or wye and
sufficient service line to the property to be served and capped. Each
end of service line shall be accurately recorded and provided to the
City in the form of "as built" plans.
e.
The design shall include a review of the City's ability to provide
treatment of the projected organic and hydraulic loading to be discharged
from the extension.
f.
The plans shall include a plan view at a scale of one (1) inch equals
fifty (50) feet or larger. The plan shall include a profile view at
a scale of one (1) inch equals fifty (50) feet or larger for all gravity
and pressure mains. Elevations shall be based on the USGS datum. Plans
with plan views and elevations shall be provided for pumping stations
and wet wells. An electrical service detail and wiring diagram shall
be provided.
g.
Sewage pump station design shall include capacities for adjacent
upstream developments. The station alarm shall include a one hundred
twenty (120) volt light and horn and a separate twelve (12) V.D.C.
alarm light and horn for power failure, unless an auxiliary power
supply is provided. The design should attempt to provide sewage flow
storage of at least two (2) hours at the peak estimated flow rate
using a combination of mains, manholes, wet well and storage tank
or basin without overflows or building backups. If a tank or basin
is to be used, the tank shall be enclosed reinforced concrete and
the basin shall have a concrete lining. Where storage is not a viable
alternative, a standby generator with auto-transfer switch shall be
provided, including specifications for approval by the City.
h.
Pressure collection and grinder pump stations are not to be used
unless specific approval is obtained from the City. Where grinder
pumps are used, a spare pump shall be provided for the first ten (10)
units installed, plus one (1) additional spare for each multiple of
ten (10) units.
6.
The developer shall be responsible for all cost of engineering, construction
and any associated cost resulting from the extension of the sewage
works.
7.
The City will provide written approval for the extension. The City
reserves the right to not approve any extension. The City reserves
the right to require a main larger than eight (8) inches be installed.
The City reserves the right to require the pump station be enlarged.
The City reserves the right to require the increase of the force main
size.
8.
The City will review its ability to receive, transmit and provide
treatment of the wastewater to be discharged by the extension. The
City may require the customer to help defray any cost the City incurs
to their sewage works to approve the customer's extension request.
9.
The customer shall be responsible for acquiring any easements for
main extensions where private property must be crossed. The easement
shall be approved by the City and the grantee shall be the City. The
customer shall obtain a title search to confirm the grantor and record
the easement at the Greene County Recorder of Deeds and provide the
City with a copy of the recorded document.
10.
The customer shall acquire the approval of the City, the Greene County
Highway Department or the Missouri Department of Transportation where
any main extension uses their respective rights-of-way. A copy of
the approval or permits shall be provided to the City.
B.
Sewer Main Specifications.
2.
Lines and grades.
a.
The contractor shall build to the lines and grades as shown on the
approved plans. Alignment and elevation control offset grade stakes
and hubs shall be provided at each manhole location. The contractor
shall be held responsible for all variation of lines and grades, as
established and laid out on the plans. The City may check the pipe
at any given point before the trench has been backfilled and if there
is a variation of more than five hundredths (0.05) of a foot, from
the true grade, the same shall be raised or lowered, as the case may
be, unless the City approves the grade change.
b.
The use of laser aligning equipment is required for the laying of
sewer lines to the specified lines and grades. The laser aligning
method selected must be shown to have worked satisfactorily on prior
contracts and is operated by competent trained men.
c.
All excavations shall be made with a sufficient working space to
permit the placing, inspection and completion of all work contemplated
in the contract. Excavated material that is unsuitable and all boulders
exposed by grading shall be removed from the work.
d.
The excavation shall not be performed any farther ahead of the bedding
and pipe laying than is necessary to permit a continuous operation.
e.
Contractor shall conduct the work at all time so as to cause no more
obstruction or inconvenience to the public than is deemed necessary
by the City. Free passage for vehicles and pedestrians shall be maintained
along roadways, sidewalks and drives. Free access shall be provided
to all operational fire hydrants, water and gas valves.
When it becomes necessary to close any street, the contractor
shall notify the City at least forty-eight (48) hours in advance of
such closure including information as to the exact location and extent,
the time and expected duration and the reason for the closure.
The contractor shall provide for sufficient number of warning
lights, signs and barricades to be available on the work and shall
cause them to be placed in such numbers and at such locations as required
to maintain reasonable safety to pedestrians and vehicular traffic.
When it becomes necessary to divert traffic, a detour route shall
be selected by the City and the contractor shall place directional
signs of such nature and in sufficient numbers to clearly define the
detour route. Barricades, lights and warning signs shall be constructed
in accordance with Section 20 of the Manual of Accident Prevention
in Construction published by the Associated General Contractors of
America or as otherwise approved by the owner. Warning lights shall
be lighted from sunset to sunrise.
f.
The contractor is solely responsible for all safety issues. The contractor
shall comply with all Federal, State and local regulations pertaining
to safety.
3.
Sheeting, timbering or bracing. Sheeting, timbering
or bracing or other similar protection shall be placed by the contractor
wherever necessary for the proper preserving of any excavation, embankment
or structure. Where the material is of such character or other conditions
are such as to render it necessary, the protective methods used shall
be designed by the contractor and installed by the contractor to brace
the trench and protect workers, equipment, finished products and adjacent
structures, etc. The contractor shall be held responsible for the
sufficiency of all sheeting and bracing or other means of protection
used and for all persons injured or property damaged as the result
of improper quality, strength, pacing, maintaining or removing the
same. The contractor shall comply with all Federal and State laws
and regulations to afford a safe working condition.
4.
Removal of water. The contractor shall furnish and
operate sufficient pumps and appliances and shall provide all materials,
labor, etc., required to prevent interferences with any work by water,
ice or snow. Damage of any kind resulting from insufficient pumping
facilities or similar lack of proper conduct of the work shall be
made good by the contractor at his/her own expense. No structure or
pipe shall be laid in water and no water shall be allowed to run into
or over any concrete work or pipe or into or through any pipe.
5.
Leaks or springs. When leaks or springs are found
which, in the opinion of the City, affect the safety or usefulness
or satisfactory operation of any of the permanent work, he/she may
direct special provisions to be taken.
6.
Backfilling.
a.
Material used for backfilling shall be free from perishable matter
and from other material liable to become unstable when saturated with
water after having been compacted. No frozen material shall be used
in the backfill. Care shall be taken to avoid injury to structures,
pipes, etc., or producing unequal pressure thereon. Special precaution
shall be taken backfilling over pipes. No backfill shall be placed
over any portion of pipes not inspected by the City.
b.
Initial backfill for sewer pipe shall be in accordance with ASTM
D2321, latest revision. Bedding material shall be used and considered
equal to Class I. The bedding shall have a minimum thickness beneath
the pipe of four (4) inches and shall extend up and to six (6) inches
over the top of the pipe.
c.
Tamping over and near the pipe must be carefully done to prevent
injury to the pipe. Backfilling for the remainder of the trench shall
contain no stone over six (6) inches in its largest dimension. This
backfilling shall be deposited and spread in layers and solidly tamped.
d.
Trenches under streets or other traffic areas shall be backfilled
with crushed rock bedding material for the entire trench depth. Minimum
compaction shall be ninety-five percent (95%) of maximum. Backfill
of excavated materials shall be a minimum of ninety percent (90%)
maximum.
e.
Over excavation of the trench shall be backfilled with bedding material
to the proper pipe elevations.
f.
Any settlement of the backfill below the original ground surface
shall be remedied by the contractor for a period of twelve (12) months
after final completion and acceptance, including reseeding, mulching
and pavement repairs.
7.
Laying pipe.
a.
The alignment of all pipe lines between adjacent manholes shall be
true to line and grade; the pipe line from manhole to manhole shall
reflect the full bore of the pipe. The pipe shall be truly centered
into the abutting pipe.
b.
"Tee" or "wye" fittings for building sewer lines shall be installed
at locations shown on the plans, they shall be four (4) inches in
diameter unless otherwise specified. Saddle type tee or wye shall
not be used for new construction. Service pipe shall be installed
to each building lot line and capped.
c.
The exact location of all "tee" or "wye" fittings and ends of the
service pipe shall be carefully ascertained by accurate measurement
from the center of the manhole next below in the same line of pipe;
that a true and exact record may be preserved for future use. As-built
drawings shall be provided by the Engineer and they shall reflect
the Tee and Wye locations along with any other plan changes. The end
of the service pipe shall be marked and length of service pipe installed,
measured and recorded.
d.
The grade lines shown on the profile drawings is the bottom of the
inside of the sewers. The pipes shall be truly laid to line and grade
throughout. Each pipe shall be laid in an even firm bed crush rock
bedding, so that no uneven strain will come to any part of the pipe.
Particular care shall be exercised to prevent the pipe from bearing
on unstable, uneven bedding.
e.
The interior of the sewer shall be cleaned of all dirt, jointing
materials and superfluous material of every description. Any open
end of the line shall be securely closed at the end of each day's
work to prevent the entrance of water, small animals, trash or any
other obstructions and shall not be opened until work is resumed.
8.
Cement. Cement shall be standard brand of Portland
Cement and shall meet the requirements of the ASTM, Serial Designation
C150, Type I, Specifications with all subsequent revisions.
9.
Concrete. The proportions of water, cement and aggregates
shall be such that the mixing water, including the free surface moisture
of the aggregate, shall not exceed six (6) gallons per sack of cement.
The cement content shall not be less than five and three-fourths (5.75)
sacks/cubic yards of mixed concrete. All concrete shall conform to
requirements of the ASTM Serial Designation C94 for ready-mixed concrete
and any subsequent revisions.
10.
Cement mortar.
a.
All cement mortar required shall have the same sand/cement ratio
as used in concrete and sufficient water to give the required consistency.
Only sufficient mortar shall be mixed to take care of the work at
hand. No mortar that has begun to set will be permitted to be used.
No retampered mortar shall be used.
b.
Non-shrink grout equal to Embeco shall be used where specified on
the plans.
11.
Aggregates.
a.
Fine aggregate shall consist of river sand which shall be free from
alkali and surface coatings and shall not contain injurious amounts
of organic or other injurious matter. Aggregate shall conform to requirements
of ASTM C33.
b.
Coarse aggregate shall consist of crushed limestone free from dust,
flint, mud balls or other foreign matter. Aggregate shall conform
to requirements of ASTM C33.
12.
Water. The water used for mortar, concrete or any
other construction purpose shall be free from oil, acid, strong alkali
or organic material.
13.
Forms. All forms (metal or wood) shall be watertight,
smooth (if wood, lumber shall be dressed on all sides) and shall be
securely fastened by nails, screws or bolts. They shall be thoroughly
and securely braced to keep them in exact positions and alignment
during the placing and setting of the concrete. The forms shall be
coated with an approved oil to prevent adherence of concrete.
14.
Manholes.
a.
Precast concrete manholes shall be used and shall conform to the
dimensions and details as shown on detail plans and meeting ASTM C478
specifications. Manhole section joints shall be sealed with Ram-Nek,
Kent Seal No. 2 or equal, to obtain a pliable watertight joint. Installation
shall conform to the manufacturer's recommendations.
b.
The concrete base and invert shall be constructed as shown on plans.
Care shall be taken to obtain a proper bond between the base, invert
and manhole section. All leaks shall be repaired. Manhole bases and
inverts shall be vibrated. Manhole barrel sections shall be waterproofed
on the exterior using Koppers Bitumastic Super Service Black, Ram-Nek
Primer I or equal.
c.
Manhole steps shall conform to ASTM C478, latest revision and shall
be spaced as shown on the plans. Steps shall be copolymer polypropylene
plastic which encases a one-half (½) inch grade 60 steel reinforcing
bar or low density polyethylene which encases a three-fourths (¾)
inch diameter 6351-T6 aluminum extrusion.
d.
Precast manhole bases and inverts may be used. Precast bases shall
have four (4) No. 4 rebars embedded in the manhole section plus wire
mesh. Precast bases shall be placed on a six (6) inch crushed stone
base over an undisturbed earth, set to the correct elevation prior
to making final pipe connections. In unstable soil conditions a concrete
pad will be required to prevent manhole settlement.
e.
All inlet and outlet pipes shall be joined to the manhole with a
gasketed flexible watertight connection equal to A-Lok that allows
differential settlement of the pipe and manhole wall to take place.
The gasket shall be cast into the manhole bottom section and conform
to tests of ASTM C425. The invert shall not prevent the pipe at the
gasket and manhole wall from moving vertically or horizontally.
f.
Where existing manholes are tied into, the contractor shall core
the wall or drill a series of holes and break through the wall to
allow for the new pipe entry. A flexible watertight gasket shall be
installed and grouted in place with non-shrink grout.
15.
Drops into manholes. All drops into the manhole
where shown on the plans shall be constructed of the same size pipe
as the sewer and shall conform to the detailed plans.
16.
Lampholes. Lampholes shall conform to the detailed
plans and shall be constructed with eight (8) inch pipe and shall
not exceed one hundred fifty (150) feet from the downstream manhole.
17.
Paving. All paving which must be removed during
the course of construction or which, in the opinion of the City, has
been damaged during the progress of the work, shall be replaced with
the same type of material as the original paving or, as otherwise
specified in the specifications or detailed plans.
a.
When the excavation has been properly backfilled and has settled
sufficiently to permit the final repairs, the backfill shall be removed
to a depth necessary to complete the pavement replacement. The existing
paving shall be removed for a distance of twelve (12) inches on each
side of the original excavation. The paving shall be sawed then broken
with care so as to insure a straight edge and a uniform patch.
18.
Blasting.
a.
The contractor shall conform to the Federal, State and municipal
laws in the handling, transportation and use of explosives. Where
blasting is necessary, suitable weighted plank covering or mattresses
shall be provided to confine all materials lifted by the blasting,
within the limits of the trench or other excavation and to prevent
injury to life and property. All excavated rock which cannot be shoveled
as earth shall be kept separately from other excavated materials and
shall not be mixed with other backfill material.
b.
Where blasting is anticipated, the contractor shall obtain proper
liability insurance coverage for blasting operations, conduct a pre-blast
survey of all potential affected structures and monitor the blast
by recording seismograph that notes the magnitude of ground movement.
c.
The contractor shall be liable for all damages resulting from any
blasting operation.
19.
Pipe.
a.
Sewer pipe may be ductile iron or solid wall polyvinyl chloride (PVC),
except that ductile iron must be used where called for on plans.
b.
Ductile iron pipe shall meet ANSI 21.51 (AWWA C151) pressure Class
350 (min) with cement mortar lining conforming to ANSI 21.4 (AWWA
C104) and bituminous seal coat.
c.
Polyvinyl chloride (PVC) sewer pipe shall be SDR-26 conforming to
ASTM D-3034, cell classification 12454B. The pipe shall have integral
wall bell and spigot joints with flexible, mechanically locked in
place compression type gaskets conforming to ASTM D-3212 and ASTM
F-477.
d.
PVC pipe fittings shall be SDR-26 conforming to ASTM D-3034, cell
classification 12454 B, with electromeric gasketed joints conforming
to ASTM D-3212 and ASTM F-477.
20.
Manholes and lamphole castings.
a.
The cast iron manhole and lamphole covers shall conform in dimension
to the detailed plans hereto attached. Castings shall conform to the
requirements of ASTM A48-74, Class 30 minimum.
b.
Manhole castings shall have machined surfaces, be traffic rated,
weigh a minimum of four hundred (400) pounds, have an entry opening
of at least twenty-two (22) inch diameter, use a single pick hole
and have centering lugs or a mud ring. Bolt down, gasket lids, may
be required where water may pond over the manhole.
21.
Pipe joint material.
22.
Bedding material. Material for bedding shall be
crushed limestone or washed and crushed gravel conforming to the following
gradation requirements of ASTM C33, Size 67.
|
Passing
|
1 inch sieve
|
100%
| |
|
Passing
|
¾ inch sieve
|
90 to 100%
| |
|
Passing
|
⅜ inch sieve
|
20 to 55%
| |
|
Passing
|
No. 4 sieve
|
0 to 10%
| |
|
Passing
|
No. 8 sieve
|
0 to 5%
|
23.
Highway crossing. The contractor shall make highway
crossings where shown on the plans. The contractor shall pay fees
and obtain permits for the crossings and shall comply with all requirements
of the Highway Department.
a.
Casing pipe. Casing pipe and joints shall be constructed
from new steel, having a minimum yield strength of thirty-five thousand
(35,000) psi. Joints shall be leakproof by welding. Pipes under highway
crossings shall have the following wall thickness: sixteen (16) inches
and under — 0.188 inch; eighteen (18) inches, twenty (20) inches
and twenty-two (22) inches — 0.25 inch.
b.
Casing pipe installation. Casing pipe shall be jacked
or installed in an auger-bored hole to the line and grade required
by the plans. Voids two (2) inches larger in diameter than the casing
shall be filled with cement grout or sand.
c.
Carrier pipe installation. The carrier pipe shall
be placed in the casing and supported as required to obtain the proper
line and grade using temporary wood shims and then the entire casing
filled with sand for permanent support. Neat cement plugs shall be
placed at the ends of the casing. Bore pits shall be backfilled with
crushed rock up to the bottom of the pipe to provide a firm support
and prevent settlement and damage to the pipe.
24.
Design standards for location of sewer with respect to water
mains.
a.
Horizontal separation. Whenever possible, sewers
should be laid at least ten (10) feet, horizontally, from any existing
or proposed water main. Should local conditions prevent a lateral
separation of ten (10) feet, a sewer may be laid closer than ten (10)
feet to a water main if:
(1)
It is laid in a separate trench, or if
(2)
It is laid in the same trench with the water mains located at
one side on a bench of undisturbed earth, and if
(3)
In either case the elevation of the top (crown) of the sewer
is at least eighteen (18) inches below the bottom (invert) of the
water main.
b.
Vertical separation. Whenever sewers must cross
under water mains, the sewer shall be laid at such an elevation that
the top of the sewer is at least eighteen (18) inches below the bottom
of the water main. When the elevation of the sewer cannot be varied
to meet the above requirements, the water main shall be relocated
to provide this separation or reconstructed with mechanical joint
type pipe for a distance of ten (10) feet on each side of the sewer
so that both joints will be as far from the sewer as possible.
When it is impossible to obtain proper horizontal and vertical
separation as stipulated above, both the water main and sewer should
be constructed of mechanical joint cast-iron and shall be pressure-tested
to assure watertightness.
c.
Water supply interconnections. There shall be no
physical connection between a public or private potable water supply
system and a sewer or appurtenance thereto which would permit the
passage of any sewage or polluted water into the potable supply.
25.
Grading and seeding.
a.
All disturbed non-paved grass areas shall be graded and seeded.
b.
All seed shall be free from Johnson grass, Canadian thistle or field
bindweed seed and contain less than two percent (2%) of other weed
seed and shall be from the previous years seed crop.
c.
All reseeded areas shall receive straw mulch at a rate not less than
two and one-half (2½) ton per acre (one hundred (100) pounds
per one thousand (1,000) square feet).
d.
The contractor shall guarantee a stand of grass and shall protect
all landscaping work against damage until completion and final acceptance
of the work.
26.
Field tests.
a.
The contractor shall furnish the owner with every reasonable facility
for ascertaining whether or not the work performed was in accordance
with the requirements and intent of the plans and specifications.
Any work done (except excavation) or material used without suitable
inspection by the City may be ordered removed and replaced at the
contractor's expense. Testing shall be coordinated and witnessed by
the City.
b.
After the completion of the work the contractor shall make such tests
of the entire work to demonstrate the efficiency of the sewer and
appurtenances. Should any of the work be found faulty in any respect,
the contractor shall repair such defects or replace them with new
work as may be directed by the City.
c.
The contractor shall provide facilities to the City to make a visual
observation test of the straightness of each section of sewer between
two (2) adjacent manholes. There shall be no visible leakage or damage
in the system including manholes and lines.
d.
If the ground water table is two (2) feet or more above the top of
the sewer line the contractor shall perform an infiltration test on
all such lengths of pipe. The testing shall be carried out by the
installation of a plug with a pipe extension through the plug to catch
the flow in a graduated container for measurements at such locations
as determined by the City. Infiltration shall not exceed one hundred
(100) gallons per inch of diameter per mile of pipe per day per manhole
reach. A suitable plug shall be installed where required to determine
accurate infiltration rates.
e.
If the groundwater table is less than two (2) feet above the top
of the sewer line the contractor shall perform a low pressure air
test on all such reaches of pipe. The tests shall be performed in
the following manners.
f.
Low pressure air test.
(1)
All newly laid pipe shall be subjected to a low pressure air
test after backfilling. The equipment shall be provided and test shall
be conducted by the contractor in the presence of the City. The test
shall be in accordance with ASTM F1417-92.
(2)
All stubs, wyes, tees and branch building sewers shall be included
in the test and shall be suitably capped and braced to withstand the
internal pressure during testing.
(3)
Air for pressurizing of the test section shall be supplied by
a properly calibrated portable, oil-free air source with a singular
control panel containing a main shut-off valve, pressure-regulating
valve, 9 psig pressure-relief valve, input pressure gauge, a continuous
monitoring pressure gauge having a pressure range of zero (0) psi
to at least ten (10) psi with minimum divisions of one-tenth (0.10)
psi and an accuracy of four-hundredths plus or minus (±0.04)
psi and a rotometer with standard CFM reading and an accuracy of two
percent plus or minus (±2%).
(4)
Low pressure air shall be introduced into the test section until
the internal air pressure reaches four (4.0) psig. After the pressure
reaches four (4.0) psig, the air supply shall be regulated so that
the pressure is maintained between three and one-half (3.5) to four
(4.0) psig for at least two (2) minutes to allow the pressure in the
test section to stabilize. After the stabilization period, the air
supply shall be disconnected and the pressure decreased to three and
one-half (3.5) psig before starting the test period.
(5)
The line section being tested shall not be accepted unless the
time required for a one (1.0) psig pressure drop from a starting pressure
of three and one-half (3.5) psig to a final pressure of two and one-half
(2.5) psig, using an allowable leakage rate of fifteen thousandths
(0.0015) cubic feet per minute per square foot of internal pipe surface.
|
Minimum Required Test Times By Pipe Size And Length
| |||||||
|---|---|---|---|---|---|---|---|
|
PIPE DIAMETER INCHES
|
MINIMUM TIME MINUTES AND SECONDS
|
LENGTH FOR MINIMUM TIME FEET
|
TIME FOR LONGER LENGTH SECONDS
|
MINIMUM TIME FOR LENGTH (L) SHOWN IN MINUTES
AND SECONDS
| |||
|
100 feet
|
200 feet
|
300 feet
|
400 feet
| ||||
|
4 inches
|
3:46
|
597
|
0.360L
|
3:46
|
3:46
|
3:46
|
3:46
|
|
6 inches
|
5:40
|
398
|
0.854L
|
5:40
|
5:40
|
5:40
|
5:42
|
|
8 inches
|
7:34
|
298
|
1.520L
|
7:34
|
7:34
|
7:36
|
10:08
|
|
10 inches
|
9:26
|
239
|
2.374L
|
9:28
|
9:26
|
11:52
|
15:49
|
|
12 inches
|
10:20
|
199
|
3.418L
|
11:20
|
11:24
|
17:05
|
22:47
|
|
|
If the pressure drops 1.0 psig before the appropriate time shown
in the above table or calculated from the formula has elapsed, the
air loss shall be considered excessive and the test section has failed
the test. If the test section fails the test, the contractor shall
determine, at his/her own expenses, the source of leakage. Segmented
testing may be utilized solely to find the location of leaks. Once
leaks are located and repaired, the entire test section shall be retested
in accordance with the above procedures.
|
g.
Each manhole shall be tested by use of a vacuum manhole tester by
Cherne or equal. Testing shall include all manhole joints including
frame to manhole joint. A vacuum of ten (10) inch Hg. or five (5)
psig shall be applied to each manhole. Loss of vacuum shall not exceed
one (1) inch Hg. over one (1) minute.
h.
Test for deflection.
(1)
When PVC pipe is used, a deflection test shall be made on the
entire length of the installed pipeline on completion of all work
including compacted backfill and placement of fill material over sewer
lines. After pipe is installed and backfill is compacted, the contractor
shall allow a minimum of thirty (30) days before making the deflection
test.
(2)
Deflection shall be determined by use of a deflection mandrel
device. The mandrel shall have a minimum diameter of ninety-five percent
(95%) of the normal inside diameter of the pipe. Failure of the mandrel
to pass freely through a pipe run between manholes by being pulled
through shall be justification for rejection at the section being
tested. Mechanical assisted pulling will not be allowed.
C.
Wet Well Mounted Pump Station.
1.
General. The wet well mounted pump station shall
be factory-built, automatic pumping station including all equipment
and appurtenances as noted on the plans and approved shop drawings.
Unless approved by the City, the manufacturer shall be H.F.E. or Smith
and Loveless, generally matching the existing stations currently in
service. The principal items of equipment for each station shall include
two (2) close-coupled, motor-driven, vacuum-primed, non-clog sewage
pumps; valves; internal piping; central control panel with circuit
breakers; motor starters and automatic pumping level controls; heater;
priming pumps and appurtenances; ventilator; and all internal wiring.
2.
Operating conditions. Each pump shall be capable
of delivering the rated flows of raw unscreened sewage against the
total dynamic heads as shown on the plans. The maximum allowable speed
shall be eighteen hundred (1,800) RPM. The minimum rated horsepower
of each pump motor and the maximum static suction lift shall also
be as noted on the plans. Normal design condition shall be the Pump
"Off" elevations and the force main "C" of one hundred twenty (120).
Maximum motor Hp shall be determined using the normal design impeller
size, the elevation of over flow from the wet well or manholes and
a "C" of one hundred fifty (150). All openings and passages shall
be large enough to permit the passage of a sphere three (3) inches
in diameter and any trash or stringy material which can pass through
a four (4) inch building sewer system.
3.
Pump chamber.
a.
The station shall be constructed in one (1) complete factory-built
assembly. It shall be sized to rest on the top of the wet well as
detailed in the construction drawings. The supporting floor plate
shall be minimum three-eighths (3/8) inch thick steel with broken
down edges or other reinforcing, to provide a rigid support.
b.
The pump station shall be enclosed by a hinged fiberglass cover.
The cover shall have a suitable drip-lip around the edge and shall
be provided with a hasp and staple connection to the floor plate to
allow the pump chamber to be locked with a padlock. A resilient rubber
seal shall be provided to provide a seal between the cover and the
floor plate.
c.
The cover shall have a latch mechanism to keep the cover open under
load. A second cover support cable or chain for the opposite side
of the latch shall be provided to stabilize the cover in the open
position. Adjustable ventilating louvers shall be provided on each
end of the fiberglass cover which are capable of being closed during
cold weather operation.
d.
A one-quarter (¼) inch aluminum manway cover located exterior
to the fiberglass pump chamber shall be provided, complete with padlocking
provisions. The manway shall be an integral part of the station floor
plate and provide access to the wet well.
e.
The pump volutes and discharge piping shall be mounted in relation
to the floor plate as detailed in the construction drawings.
4.
Welding. All steel structural members shall be jointed
by electric arc welding with welds of adequate section for the joint
involved.
5.
Protection against corrosion. After welding, all
inside and outside surfaces of the structure shall be blasted with
steel grit to remove rust, mill scale, weld slag, etc. All weld spatter
and surface roughness shall be removed by grinding. Surface preparation
shall comply with SSPC-SP6, commercial blast cleaning, specification.
Immediately following the cleaning, a single epoxy primer and a single
epoxy finish coating shall be factory applied to all inside and outside
surfaces prior to shipment. Paint system shall be equal to Tnemec
Hi-Build Epoxoline Series 66, with a minimum dry film thickness of
six (6) mils obtained. Aluminum or stainless steel shall not be coated.
A touch-up kit shall be provided to allow the contractor to repair
scratches, etc. The kit shall contain exact color match coating and
detailed instructions for use.
6.
Pumps.
a.
The pumps shall be non-clog sewage pumps of heavy cast iron construction
especially designed for the use of mechanical seals and vacuum priming.
In order to minimize seal wear caused by lineal movement of the shaft,
the shaft bearing nearest the pump impeller shall be locked in place.
To minimize seal wear resulting from shaft deflection in the mechanical
seal caused by the radial thrust of the pump, the shaft shall be a
minimum of one and seven-eighths (1⅞) inch diameter from the
top of the impeller through the lower motor bearing supporting the
impeller. The dimension from the lowest bearing to the top of the
impeller shall not exceed six (6) inches.
b.
The bearing nearest the impeller shall be designed for combined thrust
and radial load. The upper bearing shall be free to move linearly
with the thermal expansion of the shaft and shall be designed for
radial load only.
c.
The shaft shall be of solid stainless or carbon steel accurately
machined over its length. Carbon steel shafts shall be protected in
the wet end by a replaceable stainless steel sleeve.
d.
The pump impeller shall be of the non-clog type made of close-grained
cast iron and shall be balanced. The impeller shall have a taper fit
and be keyed and secured to the motor pump shaft by a stainless steel
cap screw equipped with a Nylock or other suitable self-locking device.
To prevent the buildup of stringy materials, grit and other foreign
particles around the pump shaft, all impellers shall be full diameter
or shall be trimmed inside the impeller shroud. The shroud shall remain
full diameter so that close minimum clearance from shroud to volute
is maintained. Both the end of the shaft and the impeller bore shall
be tapered to permit easy removal.
e.
The pump shall be so constructed so as to permit priming from the
low pressure area behind the impeller. Priming from high pressure
connections will not be acceptable. The priming bowl shall be transparent
to enable the operator to monitor the priming level.
f.
The pump shall be arranged so that the rotating element can easily
be removed from the volute without disconnecting the electrical wiring
or disassembling the motor, impeller, backhead or seal, so that any
foreign object may be removed from the pump or suction line.
g.
The pump shaft shall be sealed against leakage by a single mechanical
seal constructed so as to be automatically drained and primed each
time the pump is drained and primed. Water which lubricates the mechanical
seal shall be automatically drained from around the seal if the pump
loses prime.
h.
The seal shall be of carbon and ceramic materials with the mating
surfaces lapped to a flatness tolerance of one (1) light band. The
rotating ceramic shall be held in mating position with the stationary
carbon by a stainless steel spring.
i.
The pump volute shall be furnished with mounting lugs and be bolted
to the station floor, forming a gas-tight seal.
7.
Motors.
a.
The pump motors shall be vertical, solid shaft, NEMA JM, JP or P-base,
squirrel-cage induction type, suitable for three (3) phase, sixty
(60) cycle, two hundred forty (240) volt, electric current. They shall
have Class F insulation, suitable for temperatures up to one hundred
five degrees Celsius (105°C). Insulation temperature shall, however,
be maintained below eighty degrees Fahrenheit (80°F). The motors
shall have normal starting torque and low-starting current, as specified
by NEMA Design B characteristics. They shall be open drip-proof design
with forced air circulation by integral fan. Openings for ventilation
shall be uniformly spaced around the motor frame. Leads shall be terminated
in a cast connection box and shall be clearly identified.
b.
The motors shall have one and fifteen hundredths (1.15) service factor.
The motors shall not be overloaded beyond their nameplate rating,
at the design condition, nor at any head in the operating range as
specified.
c.
The motor shall be fitted with heavy lifting eyes, each capable of
supporting the entire weight of the pump and motor.
8.
Controls.
a.
The control equipment shall be mounted in a NEMA Type 1 steel enclosure
with a hinged access cover. The circuit breakers, overload reset buttons,
run time meters and control switches shall be operable without opening
the access cover. All switches and indicating lights shall be heavy
duty oil tight design. Dry type transformer shall be provided for
one hundred fifteen (115) VAC loads.
b.
Thermal magnetic circuit breakers shall be provided for branch disconnect
service and short circuit protection of all motor control and auxiliary
circuits. Industrial grade switchgear shall be used.
c.
NEMA rated magnetic across-the-line starters with under voltage release
and overload coils for each phase shall be provided for each pump
motor to give positive protection against single phasing. Each single
phase auxiliary motor shall be equipped with an over-current protection
device in addition to each branch circuit breaker or shall be impedance
protected. All switches shall be labeled and a color-coded wiring
diagram shall be provided.
d.
If the local utility does not allow full voltage starting, then a
solid state reduced voltage starter shall be used. Solid state reduced
voltage starters shall be Allen-Bradley or Square D.
e.
A running time meter shall be supplied for each pump to show the
number of hours of operation. The meter shall be enclosed in dust
and moisture-proof molded plastic case. The flush mounted dial shall
register in hours and tenths of hours up to 99999.9 hours before repeating.
The meter shall be suitable for operation from a one hundred fifteen
(115) volt, 60 cycle supply.
f.
A separate and independent priming system shall be furnished for
each sewage pump, providing complete standby operation. Each priming
system shall include separate vacuum pumps and shall have corrosion
resistant internal components. They shall each be capable of priming
the sewage pump and suction piping in not greater than sixty (60)
seconds, under rated static suction lift conditions of twenty (20)
feet at mean sea level.
g.
Each priming system shall be complete with vacuum pump, vacuum control,
three-way solenoid valve, prime level sensing probe and a float operated
check valve installed in the system ahead of the vacuum pump to prevent
liquid from entering the vacuum pump. The float operated check valve
shall have a transparent body for visual inspection of the liquid
level and shall be automatically drained when the vacuum pump shuts
off.
h.
The priming system shall automatically provide positive lubrication
of the mechanical seal each time the sewage pump is primed. To prevent
excessive stoppage due to grease accumulation, no passageway in the
priming system through which sewage must pass shall be smaller than
the equivalent of a two and one-half (2½) inch opening. Priming
shall take place on the suction side of the pump impeller.
i.
To control the operation of the pumps with variations of sewage level
in the wet well, three (3) mercury displacement switches shall be
provided with sufficient cord to eliminate splices. The cord shall
have a corrosion resistant vinyl jacket and be multi-stranded. The
switches shall be sealed in a solid polyurethane float and lead weighted.
A mercury displacement switch shall also be provided to sense a high
water level condition in the pump station wet well. The switch shall
activate a single pole double throw relay to indicate the high water
condition.
j.
An automatic alternator with manual switch shall be provided to change
the sequence of operation of the pumps every eight (8) hours or with
each pump cycle. The manual switch shall allow for either pump to
be selected as base pump or for automatic alternation.
k.
A time delay relay shall be provided to delay the lag pump start
after a power failure. Provisions shall also be made for the pumps
to operate in parallel should the level in the wet well continue to
rise above the starting level for the low level pump.
l.
A terminal strip with box type connectors shall be supplied to make
all power and control connections for both pumps. A ground terminal
strip shall also be provided. All terminals shall be marked for easy
identification. Rubber compression grommets shall be used to seal
the cords through the floor plate to secure the float positions and
to seal the station chamber from the wet well. The pump control panel
shall be completely wired at the factory, except for power feeder
lines. All wiring in the pump control panel shall be numerically or
color coded and all switches labeled as indicated on the wiring diagram.
Wiring diagrams matching the unit shall be provided.
9.
Environmental equipment.
a.
A ventilating blower shall be provided which is capable of delivering
two hundred fifty (250) CFM of air in order to remove heat generated
by continuous motor operation. The ventilating blower shall be turned
on and off by a pre-set thermostat. Louvers which are capable of being
closed for cold weather operation shall be installed in each end of
the fiberglass cover. The blowers shall be rigidly mounted and its
discharge shall have a thick resilient gasket which will match with
the louvered opening to seal the discharge when the cover is closed.
b.
An electric heater controlled by a pre-set thermostat shall be furnished.
The heater shall be rigidly mounted in the station to prevent removal
and be not less than one thousand five hundred (1,500) watts rated.
10.
Station piping.
a.
The pump suction shall be drilled and tapped for a one hundred twenty-five
(125) pound American Standard flange for ready connection to the suction
riser provided by others. The discharge line from each pump shall
be fitted with a clapper type or ball type check valve and an eccentric
full port plug valve. The clapper type check valve shall be of the
spring-loaded type with external lever arm and a replaceable resilient
seal to insure air-tight sealing. Check valves shall have stainless
steel shaft with replaceable bronze shaft bushing and shall be sealed
with an adjustable Teflon seal. The common discharge pipe shall be
provided with a dresser type sleeve coupling to connect to either
steel or cast iron piping. The discharge valves shall be above the
base plate. All valves must be capable of passing a three (3) inch
sphere.
b.
Suction and discharge piping shall be extended through the station
base plate so all field connections are made within the wet well.
A positive seal around the suction and discharge must be provided
to prevent wet well fumes from entering the station chamber.
11.
Audio/visual alarm.
a.
To indicate high water in the wet well, an audio-visual alarm shall
be provided for operation on one hundred fifteen (115) volt, single
phase power.
b.
To indicate a loss of power, a audio-visual alarm shall be provided
for operation by a twelve (12) VDC power supply, if an auxiliary power
supply is not provided.
c.
The audio/visual alarm systems shall be housed in a NEMA 4 stainless
steel enclosure mounted at the location shown in the plans.
d.
The audio alarm shall consist of vibratone horns suitable for outdoor
mounting, with an audio output of at least ninety (90) db. A silencing
switch shall be provided for each.
e.
The visual alarm shall be a vapor-proof light fixture with flashing
one hundred (100) watt, one hundred fifteen (115) VAC and a fifty
(50) watt DC lamp suitable for outdoor mounting, with red globes and
guard. The visual alarm shall continue to flash until the alarm condition
has been cleared.
f.
The battery system shall include a maintenance free lead/calcium
permanently sealed battery, a trickle charger with fast or float recharge
modes.
g.
A push-to-test feature shall be provided in the pump control panel
to indicate the alarm devices are functioning properly. The systems
shall reset automatically once the alarm condition ends.
12.
Spare equipment. The following spare equipment shall
be supplied with each wet well mounted pump station:
13.
Factory tests. All components of the pump station
shall be given an operational test of all equipment at the factory
to check for excessive vibration, for leaks in all piping or seals
and for correct operation of control system and all auxiliary equipment.
14.
Installation and operation instructions.
a.
Installation of the pump chamber shall be done in accordance with
the written instructions as provided by the manufacturer.
b.
The manufacturer's field representative shall provide startup services
to check the pump station(s) for proper installation and to instruct
the owner's personnel on recommended operation and maintenance procedures.
c.
Six (6) copies of an operation and maintenance manual giving detailed
step-by-step operating, maintenance and troubleshooting procedures
for all pump station components including control panel, vacuum priming
system and sewage pumps shall be provided to the City.
15.
Guarantee. The contractor and manufacturer of this
equipment shall provide to the City a one (1) year guarantee, from
the date of acceptance for parts and labor to correct any material
or installation problems.
16.
Electric service. Between the utility company meter
and the station control panel, the contractor shall install a double
throw switch unless a auxiliary power supply is provided. The double
throw switch shall be mounted on a uni-strut frame on the utility
company service pole or on an acceptable rack near the station. An
appliance inlet to match the City's portable electric generator connection
plug shall be installed on the bottom of the double throw switch enclosure
and wired for use. Power surge and lightning protection shall provided.
17.
Fencing.
a.
The design shall provide for the contractor to furnish and install
six (6) foot high chain link fencing and gate. All chain link fencing
and installation shall be in accordance with the "Chain Link Fence
Manufacturer's Institute" specifications.
b.
The contractor shall furnish and install a six (6) foot high chain
link fence and gate as noted on the plans. Line posts shall be set
at intervals not to exceed ten (10) feet. Where conditions require,
a shorter spacing shall be used. All posts shall be set true and plumb
with the post holes backfilled with two thousand (2,000) psi (4 sack
mix) concrete to finish grade. Line post holes shall be twelve (12)
inch diameter, thirty-eight (38) inches deep with thirty-six (36)
inch concrete embedment. The fence fabric shall be stretched taut
approximately two (2) inches above the ground securely fastened to
the posts and top rails. Stretcher bars shall be fastened to corner
posts at fifteen (15) inch intervals. Fabric shall be fastened to
line post at fifteen (15) inch intervals using tie wire, metal bands
or other approved methods. The top edge shall be fastened to the top
rail at twenty-four (24) inch intervals. Fabric splicing shall be
done by weaving a single strand into the ends of rolls to form a continuous
mesh. Where required, the top rails shall be bent to form a radius.
Bending shall be done such that the zinc coating is not damaged.
c.
The fence fabric shall be a two (2) inch by two (2) inch mesh installed
using standard line post, corner post, railing, hardware and bracing.
Fence fabric shall be 9-gauge steel wire with zinc-coating by the
hot-dip or electrolytic process. Fabric shall be knuckled on the bottom
and twisting and barbing at the top.
d.
Corner, end and pull posts shall be standard round 2.875 inches O.D.,
5.79 lb/ft., zinc-coated. Gate posts shall be standard round 4.00
inches O.D., 9.1 lb/ft., zinc-coated. Line posts shall be standard
round 1.90 inches O.D., 2.72 lb/ft., zinc-coated. Top rails shall
be standard round 1.66 inches O.D., 1.806 lb/ft., 18 ft. lengths with
coupling connection, zinc-coated.
e.
Gates shall be swing type complete with latches, stops, keepers,
hinges with provisions for three (3) strands of barbed wire above
the fabric. Gate frames shall be constructed of tubular members, welded
at all corners or assembled with fittings. Welds shall be painted
with aluminum based or zinc based paint. Frame members shall be 1.90
inches O.D., 2.72 lb/ft., zinc-coated. Gates shall be braced as required
for the installation. Fabric shall be the same as for fencing.
f.
Three (3) strands of barbed-wire shall be installed above the fence
fabric on support arms. Barbed wire shall be 12-gauge wire, 14-gauge
4-point barbs at five (5) inch intervals and zinc-coated.
g.
Hardware shall include corner post top, line post top piece with
hole for rail, stretcher bars, bands, ties or clips and other items
required for a complete installation.
18.
Wet well. The pump station shall set on a reinforced
concrete wet well. A minimum diameter of five (5) feet is required.
The pipe entries into the wet well side shall be through gasketed
connections, equal to A-Lok. The wet well shall have a sloping concrete
invert. The station mounting plate shall be firmly anchored to the
top of the wet well. The station suction pipes shall be a minimum
four (4) inch diameter, Sch. 40 PVC with solvent welded flanged or
four (4) inch D.I.P. with flanged. The suction pipes shall be cross
braced using two (2) inch stainless steel pipe, brackets and fasteners.
19.
Portable pump connection. A force main tee, gate
valve and valve box, check valve, four (4) inch aluminum quick coupler,
reinforce concrete pit and manhole frame and cover shall be installed
inside the pump station fenced area.
D.
Duplex Grinder Pump Station.
1.
General.
a.
A duplex submersible grinder station may be used in lieu of the wet
well mounted pump station where service is to developments with flows
less than seven thousand five hundred (7,500) gallons per day of average
flow.
b.
The principal items of equipment shall include two (2) close coupled,
submersible motor driven, grinder sewage pumps; valves and piping;
guide rail system; and central panel with circuit breakers, motor
starters and automatic pumping level controls.
2.
Performance requirements.
a.
Each pump shall be capable of delivering the rated flows of shredded
sewage against the total dynamic head as shown on the plans. The maximum
allowable speed shall be three thousand four hundred fifty (3,450)
rpm, the voltage shall be two hundred forty (240) volt 1-phase or
two hundred forty (240) volt 3-phase and the minimum rated horsepower
of each pump motor shall be three (3) horsepower.
b.
The number of homes or flow shall not exceed the manufacturers recommendations.
c.
The pumps shall be capable of operating throughout the range of the
impeller curve without overloading the motor.
d.
The pumps, motors and guide rail system shall be designed for Class
1, Group D, Division 1, hazardous locations.
3.
Manufacturers. In accordance with this specification,
furnish submersible grinder pump system(s) as manufactured by Myers
or Hydro-Matic brands.
4.
Pumps.
a.
Each pump shall be a centrifugal type grinder pump with recessed
type impeller and integrally built-in grinder assembly and completely
submersible motor. Pump shall be installed on a lift-out rail type
system in such a way that solids are fed in an up-flow direction to
the grinder impeller with no feet, rails or other obstruction below
grinder inlet.
b.
The pump impeller shall be of the multi-vane, recessed type to provide
an open unobstructed passage through the volute for the ground solids.
Impeller shall be of 85-5-5-5 bronze and shall be threaded onto stainless
steel shaft.
c.
The grinder assembly shall be capable of macerating all material
in normal domestic and commercial sewage including reasonable amount
of foreign objects such as wood, plastics, glass, rubber, sanitary
napkins, disposable diapers and the like into a fine slurry.
d.
The grinder assembly shall consist of grinder impeller and shredding
ring and shall be mounted directly below the volute passage. Grinder
impeller to be threaded onto stainless steel shaft and be locked in
place with screw and washer. The shredding ring shall be pressed into
iron holding flange for easy removal. Flange shall be provided with
tapped back-off holes so that screws can be used to push the shredding
ring from housing. All grinding of solids shall be from action of
the impeller against the shredding ring. Both shredding ring and impeller
shall be removable from the outside without dismantling the pumps
and hardened to fifty-five to sixty (55 — 60) Rockwell C.
5.
Motors.
a.
Pump motors shall be of the sealed submersible type suitable for
the electric service shown on the plans. Single phase motors shall
be of the capacitor start, capacitor run, type for high starting torque.
b.
Stator winding to be of the open type with Class A insulation for
operating in clean dielectric oil that lubricates bearings and seals
and cools the windings.
c.
Motors shall have three (3) bearings, two (2) ball bearings to support
the rotor and take radial and thrust loads and a single sleeve bearing
in the seal chamber to prevent shaft deflections at the lower seal.
Ball bearings shall have a B-10 life of fifty thousand (50,000) hours.
d.
A heat sensor thermostat shall be attached to top end of motor winding
and shall be connected in series with the magnetic contactor coil
in control panel to stop motor if motor winding temperature reaches
two hundred twenty degrees Fahrenheit (220°F). Thermostat to reset
automatically when motor cools. Two (2) heat sensors are to be used
on 3-phase motors, one (1) sensor for 1-phase motors.
e.
The motor shall be protected by a tandem mechanical seal of the double
spring design operating in an oil filled cavity. Seals shall have
carbon and ceramic faces Type 21 BF1C1 lapped to a flatness tolerance
of one (1) light band. Metal parts and springs shall be stainless
steel. An electrode shall be mounted in the seal cavity to detect
any water leakage past the lower seal. Electrodes shall be connected
to an amber signal light in the control panel.
f.
The common motor, pump and grinder shaft shall be of No. 416 stainless
steel threaded to take pump impeller and grinder impeller.
g.
Motor power and control cords shall be Type SO of sufficient length
to suit installation. Both cords shall be potted into motor end cap
with epoxy potting compound. In addition, a rubber grommet that seals
both cords shall be clamped onto cord by end holding cap. Cords shall
withstand a pull of one hundred fifty (150) pounds without loosening.
6.
Pump and motor castings. All castings shall be ASTM
A-48, Class 30 cast iron with 300 Series stainless steel hardware.
All iron castings shall be pre-treated with phosphate and chromic
rinse and shall be painted with high temperature baked epoxy before
machining and all machined surfaces exposed to the sewage water repainted
with high temperature baked epoxy.
7.
Electrical controls.
a.
The pump manufacturer shall supply a completely self-contained Duplex
Control Panel to operate the pumps as shown in the control wiring
schematic in the plans. The control panel shall provide short circuit
and overload protection for each pump. An automatic alternator shall
be provided to automatically alternate the lead pump duty between
the two (2) pumps on successive cycles. The alternator circuitry shall
also provide means to start the lag pump in the event the lead pump
capacity is less than the inflow or the lead pump fails. A switch
shall be provided to bypass the alternator.
b.
All control elements shall be mounted in a NEMA 4 stainless steel
enclosure. The NEMA 4 enclosure shall have a separate inside hinged
door to provide for mounting control switches, pilot lights, run time
meters and overload reset buttons. Outer door of NEMA 4 enclosure
shall have a hasp for padlock and a minimum of three (3) draw pull
type catches.
c.
A main circuit breaker for each pump shall be mounted with the operating
handles through the inside door and shall have a lock arrangement
that prevents the door from being opened when breakers are in the
"on" position. When breakers are off, all power shall be killed to
the control elements. Circuit breakers for auxiliary circuits shall
be provided.
d.
A magnetic heavy duty contactor and manual re-set quick trip ambient
compensated overload block shall be provided for each motor. Overload
coils shall hold with a voltage drop up to thirty-five percent (35%).
Starters shall be full voltage, NEMA rated.
e.
Motor start and run capacitors and start relay for single phase motors
shall be mounted in control panel.
f.
Heat sensor thermostats in each motor shall be wired in series with
the magnetic contactor coil to protect the motor against excessive
heat. Thermostats shall reset automatically when motor cools.
g.
A seal leak electrode installed in each pump seal cavity shall be
connected to an amber signal light on the control panel inside door.
h.
A run time meter shall be supplied for each pump to show the number
of hours of operation. The meter shall be enclosed in dust and moisture-proof
molded plastic case. The flush mounted dial shall register in hours
and tenths of hours up to 99999.9 hours before repeating. The meter
shall be suitable for operation on a one hundred fifteen (115) volt,
60 cycle power supply.
i.
H-O-A switches, pilot lights, run-time meters and overload reset
buttons shall be mounted on the control panel inside door. Switches
shall be oil-tight construction. Toggle type switches will not be
considered equal.
j.
Sealed displacement type mercury switches shall be supplied to control
pump cycling. The mercury switches shall be sealed in a solid polyurethane
float for corrosion and shock resistance. Conductor cord shall be
a two (2) conductor stranded cord with individual insulated wires
enclosed in a neoprene jacket. Cords shall be lead weighted at float
end and suspended from a support bracket mounted at top of pump chamber.
k.
A terminal strip with box type connectors shall be supplied to make
all power and control connections for the pumps. A ground terminal
strip shall also be provided. All terminals shall be marked for easy
identification.
l.
A high water in the wet well alarm horn and red light (115 volt),
activated by a float switch shall be provided as a part of the control
panel for the duplex stations. A separate Audio/Visual Alarm System
sensing power loss and battery powered shall be provided as detailed
in the Specification section entitled "Wet Well Mounted Sewage Pumping
Station".
m.
The pump control panel shall be completely wired at the factory,
except for the power feeder lines. All wiring in the pump control
panel shall be numerically or color coded as indicated on the wiring
diagram. Wiring diagrams matching the unit shall be provided.
8.
Pump chamber.
a.
The pump chamber (wet well) shall be fabricated from precast manhole
sections with pre-cast base. Joints shall be made with Ram-Nek or
equal, joint sealer. Pipe openings for force mains shall be grouted
with non-shrink grout and include a water-stop gasket centered in
the wet well wall opening. Gravity lines shall have a flexible, water-tight,
gasket connection. The minimum wet well diameter shall be four (4)
feet.
b.
Equipment installed shall be firmly anchored so that no undue stress
exists. All anchoring hardware shall be stainless steel.
9.
Access frame and cover. A pump chamber access frame
and cover shall be provided. The cover shall be rectangular opening
made with aluminum frame and hinged aluminum cover and of adequate
size to suit installation. A minimum clear opening shall be twenty-four
(24) inches. Cover shall be of diamond pattern no-skid type and shall
be provided with lock hasp and manual release hold open arm. Cover
shall be designed for load of three hundred (300) pounds per square
foot. All hardware shall be stainless steel.
10.
Guiderail system.
a.
The lift-out rail system assembly shall permit easy removal and installation
of the pump and check valve without the necessity of personnel entering
the wet well. Structural guide brackets with guide yokes of sufficient
bearing strength to prevent binding shall bolt to the pump. The yokes
shall mate over guide rails of a minimum of one and one-quarter (1¼)
inch pipe running between an upper rail support and the discharge
case. A discharge nozzle or flange at the check valve shall be guided
into a chamfered cavity or a sealing flange. Dual "O" rings or a resilient
seal shall effect a hydraulic seal between the two (2) parts when
it is in its operating position.
b.
The discharge case shall be securely bolted to the floor of the wet
well so that slight deflection caused by the discharge pipe will not
cause the quick-connect pump flange to leak.
c.
All cast iron parts shall be coated with corrosion resistant baked
on epoxy paint.
d.
The lift-out check valve shall be of the swing clapper type with
rubber facing. A bronze seat bushing shall be mounted in face of valve
to provide a corrosion-proof seat. The clapper shall be mounted on
a stainless steel shaft and shall be spring loaded to prevent slamming
when closing. An alternate ball-type check valve may be used with
a bronze machined sealing face and a resilient ball. The check valve
shall lift out with pump to allow for inspection, cleaning or maintenance
of the valve outside the wet well. All fasteners shall be stainless
steel.
e.
An upper guide plate shall be attached to pump to support lift out
fitting and guide pump on rails. A lifting eye shall be attached to
plate and stainless steel cable and clevis shall be furnished for
lifting pump. Each pump shall be equipped with a three-sixteenths
(3/16) inch (minimum) stainless steel lifting cable with provisions
for direct connection to the portable crane winch drum allowing continuous
lifting of the drum.
f.
Two (2) hold-down brackets shall be provided to prevent pump and
seal fitting from rising on rails.
g.
Guide rails shall be one and one-quarter (1¼) inch stainless
steel pipe and holddown pipe shall be one-half (½) inch stainless
steel pipe.
h.
Rail support and mounting bushing shall be mounted to basin wall
and shall not be attached to basin cover or cover frame.
i.
Guide rail support shall be adjustable so that perfect vertical alignment
of the rails can be obtained.
11.
Factory tests. Both submersible pumps and the control
panel shall be given an operational test of all equipment at the factory
to check for excessive vibration, for leaks in piping or seals and
for correct operation of control system and any auxiliary equipment
and for motor load through the pump curve range.
12.
Installation and operating instructions.
a.
Installation of equipment shall be done in accordance with written
instructions provided by the manufacturer in an installation and operations
manual.
b.
A manufacturer approved technician shall provide start-up services
to check pump station installation(s) for proper operation and to
instruct the owner's personnel on recommended operation and maintenance
procedures.
c.
Six (6) copies of an operation and maintenance manual giving detailed
step-by-step operating, troubleshooting and maintenance procedures
for all pump station components including control panel shall be provided
to the City.
13.
Spare parts. The contractor shall provide the following
spare parts for this project:
a.
Two (2) spare discharge seal assembly for each station.
b.
Two (2) spare tandem mechanical seal assembly for each station.
c.
Two (2) spare grinder assemblies for each station.
d.
One (1) spare mercury float switch and conductor for each station.
e.
One (1) spare alternator relay for each station.
14.
Guaranty. The contractor and manufacturer of this
equipment shall provide to the City a one (1) year guarantee from
the date of acceptance, for parts and labor to correct any material
or installation problems.
15.
Electric service. Between the utility company meter
and the station control panel, the contractor shall install a double
throw switch unless a auxiliary power supply is provided. The double
throw switch shall be mounted on a uni-strut frame on the utility
company service pole or on an acceptable rack near the station. An
appliance inlet to match the City's portable electric generator connection
plug shall be installed on the bottom of the double throw switch enclosure
and wired for use. Power surge and lightning protection shall be provided.
16.
Fencing. See wet well mounted pump station section
for "fencing".
17.
Portable pump connection. See wet well mounted pump
station section for "portable pump connection" with pipe size adjustment
to match force main size.
E.
Force Main.
1.
General. These specifications shall apply to the
installation of all pipe, fittings and valves, included in the pumping
station force main system as shown on the plans. Specific materials
and sizes to be used are set forth on the plans and in the specifications.
2.
Material.
a.
Ductile iron pipe and fittings.
(1)
Fittings shall be mechanical joint except where otherwise noted
on the plans. All iron fittings shall conform to ANSI A21.10 (AWWA
C110) with cement mortar lining. Buried fittings shall have bituminous
seal coat. Restrained joints shall be provided where noted on the
plans.
(2)
Ductile iron pipe (D.I.P.) shall conform to ANSI A21.51 (AWWA
C151) pressure Class 350 (min.) with cement mortar lining according
to ANSI 21.4 (AWWA C104) and bituminous seal coat.
(3)
The joint material for ductile iron pipe shall conform to ANSI
A21.11 (AWWA C111) for push-on-joint. Flanged or mechanical joints
shall be used where specifically noted on the plans.
b.
PVC plastic pipe.
(1)
The PVC pipe shall conform to PVC 1120 pressure pipe as made
from Class 12454-B material, as defined in ASTM D1784, providing a
hydrostatic design basis of two thousand (2,000) psi and meeting all
requirements of ASTM D-2241.
(2)
The PVC pipe shall have a pressure Class rating of two hundred
(200) psi and a SDR ratio of twenty-one (21).
(3)
The pipe shall be manufactured using an integral wall-thickened
bell end and an elastomeric-gasket, conforming to ASTM D2672 (Bell-End)
and ASTM F477 (Gasket).
(4)
The pipe shall bear the National Sanitation Foundation (NSF)
Seal of approval in addition to the marking requirements of ASTM D-2241.
(5)
Ductile Cast Iron fittings for four (4) inch and larger pipe
shall be mechanical joint. Fitting for force mains less than four
(4) inches shall be schedule 40 PVC.
(6)
The minimum pipe size shall be four (4) inches for non-clog
wet well mounted pump stations and two (2) inches for duplex grinder
pump stations.
c.
Marking tape.
(1)
A detectable marking tape, APWA color coded for sewage force
main (brown), with wording similar to "Caution Force Main Buried Below"
permanently printed on a three (3) inch wide, five (5) mil thick film,
shall be installed six (6) inches above the force main pipe.
(2)
The tape shall consist of 35-gauge solid aluminum foil core
and laminated with two layers of clear plastic film. The tensile strength
shall be a minimum of twenty-eight (28) pounds per inch (5,600 psi)
bond strength shall be five (5) hours without peeling in boiling water,
the flexibility shall be pliable hand per ASTM 671. Printing shall
be black letter and be permanent. Standard roll lengths of one thousand
(1,000) feet shall be used.
3.
Delivery and handling of materials.
a.
All materials shall be carefully inspected for damage in transit
and if such be found, same shall not be unloaded except upon the instruction
from the official freight agent.
b.
All pipe fittings, valves and other accessories shall be unloaded
by the use of hoist of skidways. Same shall be handled in such manner
as to avoid damage due to shock. Under no circumstances shall pipe
be dropped to the ground from the cars or trucks.
4.
Pipe installation.
a.
Competent men shall be employed and suitable equipment necessary
for the execution of work if required. The pipe and fittings shall
be lowered in the trench piece by piece, by means of ropes or suitable
equipment. Under no circumstances shall pipe or other materials be
dropped or dumped into the trench.
b.
Trench excavation.
(1)
Excavated trenches shall be cut to the alignment as set by the
Engineer's stakes and with sufficient width that the pipe may be efficiently
installed and to a depth to provide no less than forty-two (42) inches
of cover over the top of the pipe, except where solid is encountered.
A greater depth may be required to obtain an eighteen (18) inch clearance
with potable water lines or as required by the plans. In trenches
with sold rock, the minimum cover may be reduced to thirty (30) inches
except for water main crossings.
Trenches shall be cut as deep as necessary on either side of
natural depressions, ditches, waterways, etc., to provide the required
cover over the low spot. Excessive change in gradient shall not be
allowed unless fittings are used. Common trenching with a gravity
sewer may be used.
(2)
The pipe and fittings shall be installed using only the methods
recommended by the manufacturer.
(3)
The trench shall be excavated to depth sufficient to obtain
the required cover plus a minimum of four (4) inches of crushed stone
bedding material.
c.
Solid rock excavation. Solid rock shall be defined
as such material that cannot be excavated without drilling and blasting,
wedging, sledging or barring.
d.
Pipe laying.
(1)
A thorough cleaning of the pipe shall be done just before the
pipe is lowered into the trench. Before lowering the pipe it shall
be inspected for defects. Defective or damaged pipe shall not be installed.
(2)
Joints shall be prepared and made according to the manufacturer's
recommendations.
(3)
On all pipe lines two (2) inches in diameter and larger, all
changes in alignment exceeding twenty-two and one-half degrees (22½°)
shall be squarely anchored by suitable thrust concrete backing. Such
concrete backing shall be so spaced that the pipe or fitting joints
will be accessible for repair. The area of the bearing on the pipe
and the ground in each instance shall be determined by the Engineer.
(4)
Prior to backfilling all pipe and fittings shall be inspected
and approved by the City.
e.
Trenching, backfilling and cleanup.
(1)
The bottom of the trench shall be backfilled with four (4) inches
of crushed rock sand bedding material. Bedding material shall be deposited
in the trench simultaneously on both sides of the pipe and to elevations
of at least six (6) inches above the top of the pipe. Bedding rock
shall have the following gradation:
|
|
Percent Passing
|
Sieve Size
|
|---|---|---|
|
|
100
|
⅜ inch
|
|
|
95 — 100
|
No. 4
|
(2)
The upper portion of the trench may be backfilled with materials
containing coarser material and may be compacted by hand tamping or
flooding (trench jetting). At street crossings, the entire depth of
the backfill shall be crushed rock.
(3)
Unless otherwise specified, all disturbed lawn, parkway and
other vegetated areas shall be graded and seeded. The seed mixture
shall be the type of grass that exists in that location.
(4)
All seed shall be free from Johnson seed grass, Canadian thistle
or field bindweed seed and contain less than two percent (2%) of other
weed seed and shall be from the previous years seed crop. All reseeded
areas shall receive straw mulch at a rate not less than two and one-half
(2½) ton per acre (one hundred (100) pounds per one thousand
(1,000) square feet). The contractor shall guarantee a stand of grass
and shall protect all landscaping work against damage until completion
and final acceptance of the work.
f.
Pavement repair.
(1)
All paving which must be removed during the course of construction
or which, in the opinion of the City, has been damaged during the
progress of the work, shall be replaced with the same type of material
as the original paving or, as otherwise specified in the specifications
or detailed plans.
(2)
When the excavation has been properly backfilled and has settled
sufficiently to permit the final repairs, the backfill shall be removed
to a depth necessary to complete the pavement replacement. The existing
paving shall be removed for a distance of twelve (12) inches on each
side of the original excavation. The paving shall be sawed then broken
with care so as to insure a straight edge and a uniform patch.
(3)
Where a City street pavement replacement is required, it shall
be in conformance with that shown on the detail drawing and shall
be constructed of concrete to the depth shown.
g.
Contractor shall conduct the work at all times so as to cause no
more obstruction or inconvenience to the public than is deemed necessary
by the City. Free passage for vehicles shall be maintained along roadways
and drives, where it is practical to do so. Free access shall be provided
to all fire hydrants, water and gas valves or other emergency devices.
h.
When it becomes necessary to close any roadway the contractor shall
notify the City at least forty-eight (48) hours in advance of such
closure including information as to the exact location and extent,
the time and expected duration and the reason for the closure.
i.
The contractor shall provide for a sufficient number of warning lights,
signs and barricades to be available on the work and shall cause them
to be placed in such numbers and at such locations as required to
maintain reasonable safety to pedestrians and vehicular traffic. Barricades,
lights and warning signs shall be constructed in accordance with Section
20 of the Manual of Accident Prevention in Construction published
by the Associated General Contractors of America. Warning lights shall
be lighted from sunset to sunrise. The contractor is solely responsible
for safety and shall comply with all Federal, State and local laws
pertaining to safety.
5.
Testing.
a.
All completed pipelines shall be tested for both structural strength
and for water leakage.
b.
Pressure test. Each pipe line section to be tested
shall be subjected to a hydrostatic pressure of at least one and one-half
(1.5) times the actual working pressure at the point of testing and
not less than one and one-quarter (1.25) times the working pressure
at the highest point along the test section and a minimum of one hundred
(100) psi. Test pressures shall be of at least two (2) hours duration
and not vary by more than five (+5) psi for the duration of the test.
c.
Each pipe line section to be tested shall be filled slowly with water
and the specified test pressure, shall be applied by means of a pump
connected to the pipe in a manner satisfactory to the Engineer. Before
applying the specified test pressure, air shall be completely expelled
from the pipe line. A temporary valve shall be installed at the force
main open end.
d.
Any exposed pipe, fittings and joints shall be carefully examined
during the test. Any damaged or defective pipe or fittings that are
discovered shall be repaired or replaced with sound material and the
test repeated until the pipe line is satisfactory to the City.
e.
A leakage test shall be conducted concurrently with the pressure
test. "Leakage" is defined as the quantity of water
that must be supplied into the pipe line section being tested to maintain
the test pressure within five (±5) psi of the specified test
pressure. No pipe line installation will be accepted if the measured
leakage is greater than that determined by the following formula:
|
|
L =
|
S x D x P ½
133,200
| |
|
|
in which L is the allowable leakage in gallons per hour; S is
the length of the pipe line tested in feet; D is the nominal diameter
of the pipe in inches; and P is the average test pressure during the
leakage test in pounds per square inch gauge.
| ||
|
|
If any test discloses leakage greater than that determined by
the above formula, the contractor shall, at his/her own expense, locate
and make repairs as necessary until the leakage is within the specified
allowance.
| ||
|
|
All visible leaks shall be repaired regardless of the amount
of leakage.
| ||
6.
Highway crossing.
a.
The contractor shall make highway crossings where shown on the plans.
The contractor shall pay fees and obtain permits for the crossings
and shall comply with all requirements of the Highway Department.
If the Highway Department requires that the line be tunneled or bored
through, the contractor shall furnish all pipe, pipe encasement, tunneling,
boring equipment, timbering, shoring, bracing, rock excavation and
other labor material required.
b.
Casing pipe and joints shall be constructed from steel, having a
minimum yield strength of thirty-five thousand (35,000) psi. Joints
shall be leak-proof by welding. Pipes under highway crossing shall
have the following wall thickness: sixteen (16) inches and under,
0.188 inches; eighteen (18) inches, twenty (20) inches and twenty-two
(22) inches, 0.250 inches.
c.
Carrier pipe installation. The carrier pipe shall
be placed in the casing using manufactured 14-gauge S.S. band and
high density polymer runner casing spacers, three (3) per pipe section
or a six (6) foot maximum spacing or mechanically locked in place
high density polyethylene. Bore pits shall be backfilled with crushed
rock up to the bottom of the pipe to provide a firm support and prevent
settlement and damage to the pipe. The ends of the casing shall be
sealed with concrete grout.
7.
Design with respect to water mains.
a.
Horizontal separation. Whenever possible, force
mains should be laid at least ten (10) feet, horizontally, from any
existing or proposed water main. Should local conditions prevent a
lateral separation of ten (10) feet, a force main may be laid closer
than ten (10) feet to a water main if:
(1)
It is laid in a separate trench, or if
(2)
It is laid in the same trench with the water mains located at
one side on a bench of undisturbed earth, and if
(3)
In either case the elevation of the top (crown) of the force
main is at least eighteen (18) inches below the bottom (invert) of
the water main.
b.
Vertical separation. Whenever force mains must cross
under water mains, the force main shall be laid at such an elevation
that the top of the force main is at least eighteen (18) inches below
the bottom of the water main. When the elevation of the force mains
cannot be varied to meet the above requirements, the water main shall
be relocated to provide this separation or reconstructed with mechanical
joint type pipe for a distance of ten (10) feet on each side of the
force main so that both joints will be as far from the force mains
as possible.
When it is impossible to obtain proper horizontal and vertical
separation as stipulated above, both the water main and force main
should be constructed of mechanical joint cast iron and shall be pressure
tested to assure watertightness.
c.
Water supply interconnections. There shall be no
physical connection between a public or private potable water supply
system and a force main or appurtenance thereto which would permit
the passage of any sewage or polluted water into the potable supply.
F.
Auxiliary Power Supply.
1.
General.
a.
This Subsection (F) covers equipment, material and service requirements for furnishing, installing and acceptance testing pre-assembled emergency/standby electric generating system including all devices and equipment specified herein, as shown on the drawings or required for the service. Equipment shall be new, factory tested and delivered ready for installation.
2.
Submittals.
a.
Furnish manufacturer's catalog data and illustrations showing principal
dimensions, parts and materials for generator set, transfer switch
and specified accessories. Include technical data and specifications
for major components.
b.
Furnish sizing calculations verifying generator set selection.
c.
Furnish interconnection wiring diagrams showing all external connections
required; with field wiring terminals marked in a consistent point-to-point
manner.
d.
Furnish installation instructions and drawings showing layout and
anchorage of equipment and appurtenances.
e.
Furnish operating instructions and service manuals for the specific
equipment furnished.
3.
Quality assurance.
a.
Manufacturer shall be experienced in the design and production of
engine generator sets, automatic transfer switches and associated
controls for a minimum of five (5) years.
b.
Engine generator set, automatic transfer switch and all specified
accessories shall be provided by a single source of supply and responsibility.
4.
Gasoline engine — generator set.
a.
Acceptable manufacturers. Onan Corporation, Kohler
or CAT.
b.
Provide 4-cycle, 1,800 RPM, gasoline engine-driven generator set
with low reactance brushless generator, torque-matched excitation,
automatic voltage regulator, set-mounted control panel and high ambient
cooling system. A diesel engine may be used for higher rated generator
outputs.
(1)
Unit rating. Generator set shall be rated for
continuous standby operation, 120/240 volt, 3-phase, 4-wire, 60 hertz
at eight-tenths (0.8) power factor.
(2)
Size unit to start and carry the connected loads indicated on
the drawings.
(3)
Equip set with associated control equipment to provide automatic
starting and stopping of engine-generator and switching of load.
c.
Gasoline engine. Engine shall be 4-cycle, 1,800
RPM, inline 6 or V-6 or V-8.
(1)
Equip engine with mechanical governor, integral with fuel pump,
to provide automatic engine/generator set frequency regulation of
five percent (5%) from steady state no load to steady state rated
load.
(2)
Provide unit-mounted closed loop radiator system to properly
cool the engine when generator set is delivering full rated load with
one hundred twenty-two degrees Fahrenheit (122°F) inlet air. Guard
rotating parts from accidental contact.
(3)
Equip engine with low oil pressure, high water temperature,
over-crank and automatic overspeed shutdown devices.
(4)
Include the following engine accessories:
(a)
Electric starter capable of three (3) complete cranking attempts
without overheating.
(b)
Positive displacement, mechanical, full pressure, lubrication
oil pump. Full flow lubrication oil filters with replaceable spin-on
canister elements, dipstick oil level indicator and oil drain.
(c)
LP liquid gas fuel system shall be provided, including converter.
Contractor to secure a licensed LP installer to provide a five hundred
(500) gallon tank and the required fuel line between the tank and
engine. Fuel line to be buried and inside of two (2) inch Sch. 40
PVC pipe.
(d)
Replaceable dry element air cleaner for heavy duty application.
(e)
Engine mounted battery charging alternator with solid-state
voltage regulator.
d.
AC generator.
(1)
Shall be synchronous, four (4) pole, revolving field, drip-proof
construction, pre lubricated bearing, air-cooled by a direct drive
centrifugal blower fan and directly connected to the engine with semi-flexible
steel disc coupling.
(2)
All insulation system components shall meet NEMA MG1 standard
temperature limits for Class F insulation system. Actual temperature
rise measured by resistance method at full load shall not exceed one
hundred five degrees Celsius (105°C).
(3)
Equip generator with excitation system and voltage regulator
to maintain voltage within two percent (2%) of rated value for any
constant load between no load and rated load.
(4)
Provide unit capable of voltage recovery within three (3) seconds
and with a maximum voltage dip of twenty percent (20%) following application
of any load up to one hundred percent (100%) of rated load at rated
power factor.
e.
Engine-generator set control.
(1)
Control logic.
(a)
Control system shall provide for automatic starting and stopping
of engine- generator and switching of load.
(b)
Control shall include automatic remote start capability from
a panel mounted three (3) position (stop, run, remote) switch.
(c)
Control shall shut down and lock out upon failing to start (overcrank),
overspeed, low oil pressure, high engine temperature or operation
of a remote manual stop station.
(d)
Provide alarm indicating lights for the following conditions:
(i)
Overcrank shut down — red.
(ii)
Overspeed shut down — red.
(iii)
Low oil pressure shut down — red.
(iv)
Low oil pressure pre-alarm — yellow.
(v)
High engine temperature shut down — red.
(vi)
High engine temperature pre-alarm — yellow.
(vii)
Low coolant temperature — yellow.
(viii)
Run — green.
(ix)
Not in automatic start — flashing red.
h.
Generator set auxiliary equipment and accessories.
(1)
Housing. Provide corrosion resistant weather
protective housing constructed of rugged steel and factory-assembled
to generator set base and radiator cowling.
(a)
Housing shall permit ample airflows for generator set cooling.
(b)
Equip with lockable, hinged access doors to permit access to
service points and controls.
(c)
Housing shall be cleaned, phosphated and painted inside and
out with rust inhibiting primer and finish coat of manufacturer's
standard color.
(2)
Circuit breaker. Provide properly sized and
rated, UL listed, molded case, thermal-magnetic type, three (3) pole
circuit breaker as a load circuit interrupting and protection device.
(3)
Coolant heater. Provide engine mounted, thermostatically
controlled water jacket heater, sized as recommended by the equipment
supplier.
(4)
Starting and control batteries. Provide lead
acid type, twelve (12) volt DC, sized as recommended by the generator
set manufacturer. Include battery cables and connectors.
(5)
Battery charger. Provide ten (10) amp voltage
regulated battery charger. Equip charger with float, taper and equalize
charge settings. Provide visual alarm lights to indicate the following
conditions:
(6)
Exhaust muffler. Provide residential grade
muffler. Size, type and installation as recommended by the generator
set manufacturer set manufacturer.
5.
Automatic transfer switch.
a.
Acceptable Manufacturers. Onan Corporation, Kohler
or CAT.
b.
Provide factory assembled transfer equipment with electronic control
designed for surge voltage isolation, voltage sensors on all phases
of both sources, linear operator, permanently attached manual handles,
positive mechanical and electrical interlocking and mechanically held
contacts. Include quick-make, quick-break contact mechanisms for manual
transfer under load.
(1)
Transfer switch and accessories shall be UL listed and tested
per UL Standard 1008.
(2)
Ratings.
(a)
Main contacts shall be rated six hundred (600) volts AC minimum.
(b)
Transfer switch shall be rated to carry one hundred percent
(100%) of rated current continuously in the enclosure.
(c)
Equipment shall have a withstand and closing rating in RMS symmetrical
amperes greater than the available fault currents at the site.
(3)
Equip transfer switch with solid-state automatic control equipment
to monitor utility source and provide automatic starting and stopping
of engine-driven generator set and switching of load between sources.
c.
Construction.
(1)
Transfer switches shall be double-throw, electrically and mechanically
interlocked and mechanically held in both positions.
(2)
Equip with permanently attached manual operating handles and
quick-break, quick-make over-center contact mechanisms for safe manual
operation under load.
(3)
Provide one (1) set Form C auxiliary contacts on both sides,
operated by transfer switch position.
(4)
Transfer switches for 4-wire systems shall be supplied with
a switched neutral pole of same construction and ratings as phase
poles. All poles shall be switched simultaneously using a common crossbar.
(5)
Enclosure.
(a)
Shall be NEMA 4X stainless steel enclosure mounted as indicated
on the drawings.
(b)
Equip panel with hinged access door secured with fast operating
clamp assembly. Include padlock hasp on door.
(c)
Provide knockouts for conduit entry. Allow for wire bending
space at points of entry in accordance with NEC.
(d)
Equip panel with thermostatically controlled heater to minimize
effects of humidity and condensation.
(e)
Controls on panel door shall be key-operated. Provide position
indicator lamps and power available lamps for both sources.
(f)
Manual operating handles and all control switches, other than
key-operated switches shall be accessible only by opening the enclosure
door.
d.
Automatic controls.
(1)
Provide voltage and phase monitoring system which will automatically
start the standby generator and transfer the electrical load to the
generator when any phase of utility line voltage drops below seventy-five
percent (75%) of normal voltage and transfer the electrical load back
to the utility source when all phases are ninety percent (90%) or
more of rated voltage.
(2)
Equip transfer switch with a cranking limiter to open starting
circuit after forty-five (45) seconds should the engine fail to start.
(3)
Provide time delay features for engine starting to override
momentary power dips, load retransfer and engine shutdown.
(4)
Voltage sensors and control relays shall be solid state plug-in
type devices.
(5)
Equip unit with test switch for manual simulation of power outage
including standby operation and load transfer.
(6)
Provide solid state exerciser clock to set the day, time and
duration of generator set exercise/test period. Provide a with/without
load selector switch for the exercise period.
6.
Installation.
a.
Install standby engine-generator unit and accessories as indicated
in accordance with the equipment manufacturer's written instructions
and with recognized industry practices. Comply with NFPA and NEMA
standards pertaining to installation of standby engine-generator systems
and accessories.
b.
Make all electrical and control connections. Tighten connectors and
terminals in accordance with equipment manufacturer's published torque
tightening values. Where manufacturer's torque values are not indicated,
tighten connectors and terminals to comply with tightening torques
specified in UL Standard 486A.
c.
Grounding. Provide equipment grounding connections
for engine-generator set as required by NEC. Tighten connections to
comply with torques specified in UL Standard 486A, to assure permanent
and effective ground.
d.
Provide all necessary materials, components and adjustments as required
for a complete and operating standby power system.
e.
Provide all necessary fuel and lubrication for initial startup, testing
and as required for successful operation.
7.
Field testing.
a.
Manufacturer's services.
(1)
Provide equipment manufacturer's services at the job site to
check installation, to perform initial startup and operational test
and to instruct Owner's personnel in the proper operation and maintenance
of the equipment.
(2)
Services to be performed by an authorized representative of
the engine generator set manufacturer.
b.
Operational test.
(1)
Prior to acceptance, an operational test of all pumps and control
systems shall be performed to determine if the installed equipment
meets the purpose and intent of the specifications. Operational test
shall demonstrate that the equipment is not electrically, mechanically,
structurally or otherwise defective; is in safe and satisfactory operating
condition; and conforms with the specified operating conditions.
(2)
Installation acceptance tests to be conducted on-site shall
include a "cold start" test, a two (2) hour full load test and a one-step
rated load pickup test in accordance with NFPA 110. Provide a resistive
load bank and make temporary connections for full load test as required.
(3)
Operational test shall include checks for excessive vibration,
leaks in fuel system, correct operation of control systems and equipment,
proper alignment, excessive noise levels and power output.
(4)
Perform complete megger testing.
(5)
Make all necessary equipment adjustments and corrective work
indicated by tests. Repeat testing as necessary.
(6)
Submit two (2) copies of written report stating operations performed
and results obtained.
8.
Guarantee. The contractor and manufacturer of this
equipment shall provide to the City a one (1) year guarantee from
the date of acceptance, for parts and labor to correct any material
or installation problems.
[Ord. No. 06-05-01, 5-9-2006; Ord. No. 07-03-02 §2, 3-19-2007]
The standard drawings associated with this Chapter and referred
to therein are as follows:
|
Street Details
Drawing No. 1
 |
|
Street Details
Drawing No. 2
 |
|
Note: Place 4" of compacted Type 1 Aggregate
under pavement and 1' 0" beyond curb.
|
|
Street Details
Drawing No. 2
| ||||
|---|---|---|---|---|
|
STANDARD PAVEMENT WIDTH AND THICKNESS
| ||||
|
STREET TYPE
|
MINIMUM RIGHT-OF-WAY WIDTH
|
PAVEMENT WIDTH
|
"T"
| |
|
Alleys
|
20 feet
|
6 inches
| ||
|
Local
| ||||
|
"R-1" or "R-2"
|
50 feet
|
28 feet
|
6 inches
| |
|
"R-3" or "R-4"
|
60 feet
|
36 feet
|
6 inches
| |
|
Collector
| ||||
|
"R-1, "R-2", "R-3", "R-4"
|
60 feet
|
36 feet
|
7 inches
| |
|
"C-1", "C-2" and "M-1"
|
60 feet
|
44 feet
|
7 inches
| |
|
Arterial
|
80 feet
|
68 feet
|
7 inches
| |
|
Parkway
| ||||
|
Divided
|
120 feet
|
68 feet
|
To be determined individually
| |
|
Undivided
|
100 feet
|
68 feet
| ||
|
Note: Cross slope shall be 3/16"/foot on all
pavements except alleys. To create a gutter section the contractor
shall form a 2" rise 2' from the inside of the curb. Pavement width
will be measured from back to back of curbs on improved streets.
| ||||
|
Curb Radius Chart
Drawing No. 3
 |
|
Joint Location Chart
Drawing No. 4
 |
|
Pavement Keyways
Drawing No. 5
 |
|
Residential Driveway Section
Drawing No. 6
 |
|
Rural Driveway Plan View
Drawing No. 6
 |
|
Commercial Driveway Section
Drawing No. 6
 |
|
Pre-Cast Curb Inlet
Drawing No. 7
 |
|
Street Cut Specifications
Drawing No. 8
 |
|
Concrete Driveway Detail
Drawing No. 9
 |
|
Pipe Trench And Bedding
Drawing No. 10
 |
|
Standard Building Sewer Connection
Drawing No. 11
 |
|
Dissimilar Pipe Or Repair Connection Detail
Drawing No. 12
 |
|
Pre-Cast Manhole With Pre-Cast Base And Invert
Drawing No. 13
 |
|
Drop Manhole
Drawing No. 14
 |
|
Existing Manhole Connection
Drawing No. 15
 |
|
Plans For Manhole Inverts
Drawing No. 16
 |
|
Manhole Step
Drawing No. 17
 |
|
Standard Manhole Frame And Cover
Drawing No. 18
 |
|
Standard Lamphole
Drawing No. 19
 |
|
Force Main Details
Drawing No. 20
 |
|
Sewage Air Valve Detail
Drawing No. 21
 |
|
Wet Well Mounted Pump Station
Drawing No. 22
 |
|
Duplex Grinder Pump Station
Drawing No. 23
 |
|
Building Sewer Details
Drawing No. 24
 |
 |
|
Building Sewer Materials
Drawing No. 25
Illustration to be provided by the City.
|
A.
The
building sewer pipe and fittings shall conform to the following specifications
for materials and installation.
1.
Pipe and fittings.
a.
Solid wall PVC (Sch. 40). Shall be manufactured
in accordance with ASTM-D-1784 and ASTM D-1785. Joints shall be solvent
weld or compression elastomeric seal.
b.
Cast iron soil pipe. Shall be manufactured in accordance
with ASTM-A-74. Joints shall be compression rubber gasket conforming
to ASTM C564.
2.
Pipe coupling. Shall be manufactured using elastomeric
PVC with stainless steel bands and screws for joint makeup. Coupling
shall be designed for the specific type and size of pipe to be joined.
The PVC shall be designed for use in sewers, including ultraviolet
sunscreen, fungicide preventative and resistant to caustic chemicals.
In unstable soil conditions a stainless steel shear ring should be
used. Couplings shall be equal to FERNCO.
3.
Saddle tee or wye. A PVC saddle type tee or wye
shall be used in the tapping of existing sewer mains. The saddle shall
have a gasketed skirt and held in position by two stainless steel
bands. The connection shall be gasketed or slip depending on the building
sewer pipe being used. Other types of saddles may be used if specifically
designed for the intended purpose and provides a watertight connection,
and is approved for use by the superintendent.
