[HISTORY: Adopted by the Department of Public
Works of the Town of Barnstable Spring 2003. Amendments noted where
applicable.]
As used in this chapter, the following terms
shall have the meanings indicated:
American National Standards Institute
American Society for Testing and Materials
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 a building and conveys the discharge to the building
sewer, beginning five feet outside the inner face of the building
wall.
The sewer extension from the building drain to the public
sewer, or other place of wastewater disposal.
Any property on which an activity is carried which falls
into any of the following Standard Industrial Classification codes.
|
SIC Code(s)
|
Industry Category
|
|---|---|
|
753 - 7549
|
Automotive repair and services
|
|
7231, 7241
|
Beauty shops, barbershops
|
|
7211 - 7219
|
Laundry cleaning and garment services
|
|
4911, 4925, 4931, 4939
|
Electric, gas services (power-generation gas
production only)
|
|
4011 - 4581
|
Transportation (maintenance only)
|
|
8062 - 8069
|
Hospitals
|
|
2000 - 3999
|
Manufacturing
|
|
2000 - 2099
|
Food products
|
|
2100 - 2199
|
Tobacco products
|
|
2200 - 2299
|
Textile mill products
|
|
2300 - 2399
|
Apparel and other finished products made from
fabrics and similar materials
|
|
2400 - 2499
|
Lumber and wood products, except furniture
|
|
2500 - 2599
|
Furniture and fixtures
|
|
2600 - 2699
|
Paper and allied products
|
|
2700 - 2799
|
Printing, publishing and allied industries
|
|
2800 - 2899
|
Chemicals and allied products
|
|
2900 - 2999
|
Petroleum refining and related industries
|
|
3000 - 3099
|
Rubber and miscellaneous plastics
|
|
3100 - 3199
|
Leather tanning and finishing
|
|
3200 - 3299
|
Stone, clay, glass and concrete products
|
|
3300 - 3399
|
Primary metals industries
|
|
3400 - 3499
|
Fabricated metal products (except machinery
and transportation equipment)
|
|
3500 - 3599
|
Industrial and commercial machinery and computer
equipment
|
|
3600 - 3699
|
Electronics and other electrical equipment and
components, except computer equipment
|
|
3700 - 3799
|
Transportation equipment
|
|
3800 - 3899
|
Measuring, analyzing and controlling instruments;
photographic, medical and optical goods; watches and clocks
|
|
3900 - 3999
|
Miscellaneous manufacturing industries
|
A sewer owned or controlled by the Town in which owners of
abutting properties have rights.
Any property which is used exclusively for residential use
and where the waste being generated contains sanitary sewage with
no waste from any process or industrial trade or business activity.
A sewer which carries sewage and to which stormwaters, surface
waters and groundwaters are not intentionally admitted.
A combination of the water-carried wastes from residences,
business buildings, commercial or industrial establishments and other
facilities of public or private institutions, together with such groundwaters,
surface waters and stormwaters as may be present.
A pipe or conduit for carrying sewage.
The combination of building sewers, associated collection
and storage containers, valve pits, buffer tanks and pumping stations,
and public sewers through and by means of which wastewater flows and
is transported to the wastewater treatment plant.
The Town of Barnstable.
A combination of liquid and water-carried wastes, whether
treated or untreated, from residences, business buildings, industrial
and manufacturing facilities, and facilities of private and public
institutions, together with such groundwaters, surface waters and
stormwaters as may be present, which is contributed into or permitted
to enter the sewer system.
A.Â
No sewer connection, disconnection or alteration of
a sewer connection to a municipal sewer shall be constructed prior
to obtaining the appropriate sewer connection permit, and payment
of the appropriate permit fee, from the Town of Barnstable Department
of Public Works. The building sewer connection must be installed by
a contractor who is licensed as a disposal works installer by the
Town of Barnstable Board of Health or by a contractor who has been
approved by the Town of Barnstable Department of Public Works. Failure
of a licensed installer to secure a permit prior to beginning work
on a connection, disconnection or alteration shall result in a ninety-day
license suspension for the first offense, a one year suspension for
the second offense and license revocation for the third offense. In
order to avoid these penalties, the installer must apply and pay for
the required permit no later than 72 hours after initiating work on
the connection. Any work on a municipal sewer connection by anyone
not licensed by the Department of Public Works shall be subject to
a fine not to exceed $500.
B.Â
All building sewer connections for industrial/commercial
discharges shall submit a copy of their State sewer connection permit
to the Town of Barnstable Department of Public Works for review.
C.Â
All industrial/commercial building sewer connections
shall install any pretreatment equipment and meet all pretreatment
discharge requirements, as determined to be necessary by the Town
of Barnstable Department of Public Works Water Pollution Control Division.
D.Â
All sewer connection permits are valid for a period
of 180 calendar days from the date of issue. Forty-eight hours must
be given to the Engineering Division before beginning work on a sewer
connection. No work shall be backfilled until approval for backfilling
is given by Engineering Division personnel. Any work that has been
backfilled without that approval shall be uncovered at the request
of Engineering Division personnel.
A.Â
Other contractors (plumbers, general contractors,
excavation contractors, etc.) who wish to install or alter building
sewer connections in the Town of Barnstable must submit to the Department
of Public Works a company history, certificate(s) of insurance(s)
or bond(s), a list of references and any other information which the
contractor believes may be pertinent. The information will be reviewed
by the Town Engineer and a determination will be made.
B.Â
Insurance(s) and bond(s) must include the following:
(1)Â
Workmen's compensation: minimum limit of employer's
liability of $1,000,000.
(2)Â
Commercial general liability insurance: covering the
premises, operations, completed operations, contractual and protective
hazards that may be presented by the work to be done, in an amount
of $1,000,000 each occurrence limit; a products-completed operations
aggregate limit of $2,000,000 and a general aggregate limit of $2,000,000.
(3)Â
Owned and nonowned automobile liability insurance:
combined single limit in an amount of not less than $1,000,000.
The appropriate sewer connection/extension permit,
when applicable, must be obtained from the Massachusetts Department
of Environmental Protection, prior to applying for a sewer connection
permit from the Town of Barnstable Department of Public Works.
A.Â
The property owner is responsible for obtaining all
permits or license(s) from the Town of Barnstable Building Services
Division; the Town of Barnstable Conservation Commission; Town of
Barnstable Water Pollution Control Division; Massachusetts Highway
Department; Massachusetts Department of Environmental Protection;
and other federal, state or municipal regulatory agencies, when appropriate.
B.Â
The installer must obtain all appropriate permits
necessary from the Town of Barnstable Board of Health, prior to performing
the installation/disconnection of grease traps, waste interceptors
or septic systems.
C.Â
A pretreatment survey from the Town of Barnstable
Water Pollution Control Division must be filed for all industrial
and commercial building sewer connections, and the property owner
shall install any pretreatment equipment necessary to meet all pretreatment
discharge requirements, as determined by the Town of Barnstable Department
of Public Works.
D.Â
A grease trap installation permit obtained from the
Town of Barnstable Department of Public Health must be provided to
the Engineering Division prior to the issuance of a sewer connection
permit.
E.Â
A permit to abandon the existing septic system must
be obtained from the Town of Barnstable Department of Public Health.
F.Â
A road opening permit must be obtained from the Town
of Barnstable Department of Public Works Engineering Division prior
to any work being performed within the designated layout of a Town
road or sidewalk. All road opening work must be performed by a contractor
licensed to perform road opening work by the Town of Barnstable Department
of Public Works Engineering Division.
G.Â
All industrial or commercial properties and any residential
property whose flow is expected to exceed 2,000 gallons per day (7,500
liters per day), based on Title V quantity estimates, connecting to
the municipal sewer must obtain and file a pretreatment survey with
the Town of Barnstable Water Pollution Control Facility. All industrial
building sewer connections shall install any pretreatment equipment
and meet all pretreatment discharge requirements, as determined to
be necessary by the Town of Barnstable Department of Public Works.
A.Â
All building sewer connections and alterations of
an existing sewer connection shall be designed and installed in accordance
with accepted engineering principles. A plan of the proposed building
sewer connection or alteration must be submitted to the Department
of Public Works Engineering Division as part of the sewer connection
application for residential flows expected to exceed 2,000 gallons
per day (7,500 liters per day), based on Title V quantity estimates,
and for all commercial or industrial flows. This plan shall include
a sketch of the lot and buildings to be served and the proposed layout,
locations and depths of the sewer piping and other appurtenant structures
(manholes, valve pits, buffer tanks, grease traps, cleanouts, etc.).
B.Â
The plan for a disconnection shall include a sketch
of the lot and buildings located on the property, locations of existing
sewer pipe and appurtenances. The disconnection shall be performed
at the property line and the cut sewer line, and pipe end shall be
capped and encased in concrete.
The building sewer shall be constructed of PVC
SDR 35 pipe, Schedule 40 PVC or better, as acceptable to the Department
of Public Works. The minimum size of the building sewer shall be four
inches (100 mm) in diameter for residential connections and six inches
(150 mm) in diameter for commercial or industrial connections. Upon
approval from the Department of Public Works, larger diameter pipe
may be installed. Pipe and fittings shall be uniform and homogeneous
throughout and free from visible cracks, holes, foreign inclusions
or other injurious defects. Pipe, fittings and other materials shall
be examined prior to installation for any defects.
All pipe joints of the building sewer shall
be made watertight and protected against damage from roots, stones
or other objects. Each length of pipe shall be laid to form a tight
joint and to bring the inverts into a continuous line. All pipe shall
be clean and free of dirt before laying and open ends shall be kept
covered and free of dirt during construction. Where new pipes are
to join existing piping, structures and appurtenances, extreme care
shall be taken in cutting into the existing material and tight connections
shall be made. Where new piping and construction is to join existing
structures and appurtenances, care shall be taken so as to not interrupt
existing service.
A.Â
The building sewer shall be laid on a firm base. The
subbase shall be compacted prior to placing the pipe bedding material.
Material used for bedding and cover shall be free of large stones,
frozen clumps of earth, masonry, stumps or any other deleterious materials.
The bedding material shall be placed and compacted by manual or mechanical
means to suit the material, and acceptable to the Department of Public
Works, to minimize settlement or other movement of the piping and
any appurtenant structures. Commercial or industrial connections and
appurtenant structures shall be laid on a layer of crushed stone Type
A, 3/4 inch (19 mm), and shall meet the following gradation requirements:
|
Sieve
|
Percent Passing
(square openings)
| ||
|---|---|---|---|
|
1 inch
|
25 mm
|
100
| |
|
3/4 inch
|
19 mm
|
90 - 100
| |
|
1/2 inch
|
12.5 mm
|
10 - 50
| |
|
3/8 inch
|
9.5 mm
|
0 - 20
| |
|
No. 4
|
4.75 mm
|
0 - 5
| |
B.Â
Cover for building sewer connections shall be a minimum
of three feet (900 mm).
C.Â
For residential connections, suitable excavated material
may be used as backfill for pipe bedding and cover.
D.Â
Each pipe shall be held firmly in position by carefully
and thoroughly tamping backfill material around the barrel of the
pipe. Tamping irons shall be used.
E.Â
The building sewer shall not be designed or constructed
so as to pass over a water pipe or storm drainpipe. Sewer connections
shall be installed with a minimum horizontal separation of 18 inches
(450 mm) and a minimum vertical separation of 36 inches (900 mm) from
a waterline or storm drain. If it is necessary to cross above a water
utility or storm drainpipe, the building sewer shall be encased in
concrete or placed in a large diameter watertight sleeve for a distance
of 10 feet (three meters) on both sides of the crossing.
The building sewer shall be designed so as to
provide a minimum flow velocity of two feet per second (0.6 meters
per second), when flowing full. The building sewer shall be laid on
a continuous grade and in a straight line. Allowable slope shall not
be less than that listed on the following table:
|
Pipe Diameter
|
Minimum Slope
(foot/foot)
(meter/meter)
| ||
|---|---|---|---|
|
4 inches
|
(100 mm)
|
0.0250
|
1/2 bubble
|
|
6 inches
|
(150 mm)
|
0.0125
|
1/4 bubble
|
|
8 inches
|
(200 mm)
|
0.004
| |
|
10 inches
|
(250 mm)
|
0.0035
| |
|
12 inches
|
(300 mm)
|
0.003
| |
A cleanout tee shall be provided at the exterior
wall of the building for all building sewer connections. Residential
sewer connections shall include a cleanout tee upstream of all major
bends. Where right-angle bends cannot be avoided, they shall be long
sweeps or a series of bends of 45° with a short pipe length between
each bend. Cleanout tees shall be sealed with a removable, reusable
threaded screw-on cap. Cleanouts, or riser connections, shall be installed
at or just below grade, for reasonable access and use. All cleanouts
installed in areas subject to vehicular traffic must be constructed
to withstand H-20 wheel loads.
A minimum four-inch diameter vent pipe shall
be provided at the exterior wall of the building for all sewer connections
to valve pits or buffer tanks connected to the vacuum sewer system.
All aboveground vent piping shall be Schedule 80 PVC and shall have
a stainless steel bird screen. Vent piping shall be located a minimum
of 20 linear feet away from the valve pit or buffer tank it is connected
to. Bollards or similar Department of Public Works approved protective
devices shall be installed to protect above-grade piping at all commercial
and/or industrial sites. Protective devices for residential installations
shall be required as determined by Department of Public Works Sewer
Inspector.
Commercial or industrial sewer connections shall
include a sampling station, to be used for discharge sampling, located
in the road layout at the property line.
For commercial or industrial sewer connections
manholes shall be used at all locations where pipe size, slope or
direction changes. Distance between manholes shall not exceed 300
feet (90 meters). With prior approval from the Town of Barnstable
Department of Public Works, minor direction changes may consist of
long sweeps or a series of bends of 45° with a short pipe length
between each bend. Manholes shall be constructed of pre-cast concrete.
Pre-cast concrete manholes shall be commercially manufactured units
of 3,000 psi (20 mpa) minimum, air-entrained concrete conforming to
ASTM Standard C478. All joints between pre-cast sections shall be
sealed with bitumastic sealant or other method acceptable to the Department
of Public Works. Steps in pre-cast concrete manholes shall be aluminum
or polypropylene. Polypropylene steps shall be steel reinforced and
shall be embedded a minimum of three inches (75 mm) into the concrete.
Joints between the manhole and pipes shall consist of cast-in-place
flexible rubber sleeves with stainless steel clamps. Manholes shall
be laid on a layer of crushed stone Type A, 3/4 inch (19 mm), meeting
the gradation requirements listed above. The layer of bedding material
for the manhole base shall be not less than six inches (150 mm) thick.
Inverts may be cast of cement concrete or brick and mortar, and must
be surfaced with cement or clay brick. Brick shall be laid in portland
cement mortar composed of one part portland cement and two parts sand,
measured by volume, to which not more than 10 pounds of lime shall
be added for each bag of cement. Portland cement shall conform to
ASTM Standard C150, Type II. Sand for the mortar shall be clean and
sharp and contain no grains that will be retained on a mesh screen
of 1/8 inch (3.125 mm). Backfill material shall consist of clean soil
material and be free of large stones, frozen clumps of earth, masonry,
stumps or any other deleterious materials. Backfill shall be uniformly
placed, in six-inch layers around the structure and thoroughly compacted
with hand tampers or mechanical equipment.
A.Â
The appropriate permits must be obtained from the
Town of Barnstable Board of Health before installation of the grease
trap and building sewer connection is started. The installation of
the grease traps or waste interceptors shall be inspected and accepted
by the Town of Barnstable Board of Health prior to being backfilled
by the contractor.
B.Â
A waste interceptor or grease trap shall be installed
for all facilities discharging other than domestic wastes, such as
food handling/preparation facilities, laundromats, scientific/research
facilities or facilities handling/storing petroleum products. Grease
traps or waste interceptors shall be constructed of pre-cast reinforced
concrete or other prefabricated materials acceptable to the Department
of Public Works. All joints between pre-cast sections shall be sealed
with bitumastic sealant or other method acceptable to the Department
of Public Works. The grease trap or waste interceptor shall be installed
on a separate discharge line serving that part of the plumbing system
into which the grease or waste will be discharged before flowing to
the building sewer. Grease traps and interceptors shall have a minimum
depth of four feet (1.2 meters) and a minimum capacity of 1,000 gallons
(3,750 liters). The waste interceptor or grease trap shall have sufficient
capacity to provide at least a twenty-four-hour detention period.
Grease traps and interceptors shall be located so as to be accessible
for cleaning and servicing. Records pertaining to the cleaning shall
be delivered to the Town of Barnstable Board of Health.
Building floor drains may be connected to the
Town sewer system, provided that an appropriately designed and constructed
oil/water separator is installed between the floor drain(s) and the
sewer connection. The amount of oil in the discharge effluent from
the oil/water separator shall not exceed 10 parts per million. A description
of the proposed oil/water separator must be submitted to the Department
of Public Works with the sewer connection application. The description
submittal shall include a list of materials that will be stored or
utilized in or adjacent to the area of the floor drain(s). Additional
treatment requirements, protection or surety may be required by the
Town, after review of the sewer connection application, on a case-by-case
basis. The oil/water separator shall be inspected monthly and cleaned
in accordance with the manufacturer's recommendations or when the
level of waste oil is 25% of the effective depth or at least every
three months, whichever comes first.
PVC pipe for force mains or low-pressure sewers
shall be Schedule 40 or SDR 21. Ductile iron pipe shall conform to
ANSI Standards A21.50 and A21.51, Thickness Class 52, and shall have
either mechanical joint or a type of joint which employs a single,
elongated, grooved rubber gasket. Rubber gaskets shall be oil-resistant,
conforming to ANSI Standard A21.11. In-line flushing connections shall
be installed at terminus of pressure lines. Distance between cleanout/flushing
connections shall not exceed 600 feet (180 meters). Air-release valves
shall be installed at each high point on a force or pressure sewer.
A.Â
The building sewer connecting to a vacuum valve pit shall be constructed of Schedule 40 or SDR-21 PVC pipe. Pipe shall be connected to existing pipe stubs from the valve pit or buffer tank. The contractor shall field verify the invert elevation at each buffer tank or valve pit to be connected. Valve pits are provided with four-inch stubs and will require the use of four-inch by six-inch reducers for commercial connections. Reducers shall be located within two feet of the valve pit for proper connection. Gravity piping to the valve pit or buffer tank shall be installed with proper slope and bedding as specified in this document. Pipe joints shall be as specified under § 901-8, Pipe joints.
B.Â
Only homes or apartments whose lower floor elevations
are identical shall be connected to a common valve pit. Multiple-floor
apartment complexes shall have each floor served by its own valve
pit or shall be served by a buffer tank.
C.Â
The Department of Public Works shall be notified a
minimum of seven days prior to making the final connection to any
valve pit or buffer tank. Connections shall be scheduled with the
Department of Public Works to allow for the installation of the vacuum
valves. Vacuum valves shall only be installed following the installation
of the vent pipe but prior to final connection to the building. Valve
installation shall be performed by the Town during the hours of 8:00
a.m. to 1:00 p.m., Monday through Thursday, excluding all holidays.
A.Â
Force main piping shall be as specified under § 901-17, Force main and low-pressure sewers, and gravity piping shall be constructed of SDR-21 PVC pipe. A minimum of 20 feet of gravity piping shall be provided at two-percent slope prior to entering the valve pit or buffer tank. The vent pipe on the force main connection line may be optional at the discretion of the Department of Public Works if one or more additional gravity vents are installed on gravity lines servicing the same valve pit or buffer tank. Force main and low-pressure sewer systems may only connect to a vacuum sewer system after approval from the Department of Public Works. Any force main and low pressure sewer systems allowed to connect to a vacuum sewer system shall not pump to a rate greater than that listed on the following table.
|
Vacuum Sewer Connection Via:
|
Maximum Allowable Pumping Flow Rate1
| |
|---|---|---|
|
Valve pit (1 valve)
|
15 gpm (maximum 50 gallons pumping volume per
cycle
| |
|
Single valve buffer tank (1 valve)
|
15 gpm commercial; 30 gpm residential
| |
|
Dual valve buffer tank (2 valves)
|
30 gpm commercial; 60 gpm residential
| |
|
Dual buffer tank with splitter MH (4 valves)
|
60 gpm commercial; 120 gpm residential
|
|
1Maximum allowable
pumping flow rate for buffer tanks is the total of all connections
to the buffer tank(s).
| ||
B.Â
With prior approval from the Department of Public
Works, wastewater may be pumped up to a properly designed and constructed
distribution box or sampling manhole prior to the valve pit or buffer
tank and then connected to the valve pit or buffer tank by gravity
as describe above. Flows shall not exceed those as shown on the table
above. Distribution boxes and manholes shall be constructed of pre-cast
reinforced concrete or other prefabricated materials acceptable to
the Department of Public Works. A description of the proposed distribution
box connection must be submitted to the Department of Public works
with the sewer connection application.
Pumps shall be either factory preassembled grinder
pump(s) or nonclog centrifugal pump(s) capable of passing four-inch
(100 mm) solids, appropriately sized for required capacity at design
head. The pre-engineered pump station shall consist of either submersible
pump(s) within a wet well or dry pit pump(s) housed separately from
the wet well. Either shall have appropriate level controls within
the wet well. A separate electrical control panel, with warning alarms
connected from the wet well level controls shall be contained within
a watertight enclosure or be located within a building. A red flashing
alarm light shall be located on the exterior of the building at a
location visible from the street. The pre-engineered pump station
shall have a check valve and a gate valve along the discharge pipe,
located outside the wet well and contained within a pre-cast pit for
accessibility and servicing. Single-family residential sewer connections
may be served by a simplex pump installation; all commercial or industrial
sewer connections and multiple residential sewer connections shall
install a duplex pump system.
A.Â
Manholes shall be topped with a cast-iron frame and
cover. Manhole frames and covers shall be marked "SEWER." Frames and
covers shall be of tough, gray cast iron conforming to ASTM Standard
A48, Class 30. Cast-iron frames and covers shall be set in full mortar
beds true to line and grade. Cement concrete collars shall be placed
around the castings after the final setting.
B.Â
Adjustments to grade shall be accomplished by the
use of a stackable frame riser ring. Frame and cover adjustments may
not be obtained by brick and mortar under the flange of the casting.
A.Â
No direct sewer connections or repairs shall be made
to a vacuum sewer, except by written permission of the Department
of Public Works. All proposed connections to a vacuum sewer shall
be accompanied by a written request from the owner, and/or contractor,
clearly identifying the proposed flow to be connected, to allow the
Town to determine the impact on system capacity and allow for proper
sizing of required valve pit or buffer tank. Only following verification
of sufficient available capacity of the vacuum system shall the DPW
issue approvals for connection.
B.Â
When a gravity sewer connection must be made into
a sewer main, where a service connection is not available, the sewer
connection shall be tied in using an appropriate tapping saddle or
PVC wye. The tapping saddle shall be made of aluminum, stainless steel
or other material acceptable to the Department of Public Works. The
saddle shall be a wrap-around type with full-length internal gasket
and multiple nut and bolt clamps. The sewer main shall be cleaned
of all dirt and foreign matter and inspected for any scores, dents,
pin-holes, small surface cracks or other injurious defects which may
interfere with the proper installation or operation of the saddle.
The saddle and tapping shall be installed according to the manufacturer's
recommendations and in such a manner so as not allow any exfiltration
of wastewater from the sewer main or infiltration of groundwater into
the sewer main. The sewer main and service pipe shall be encased in
concrete for a distance of 12 inches beyond the tapping saddle.
C.Â
For installation of a PVC wye tie-in, a suitable length
of sewer main shall be cut out using a saw with a high speed rotating
cutting blade. The sewer main pipe ends shall be wiped clean with
a clean cloth. All rough edges and burrs shall be removed or smoothed.
Any foreign material shall be removed from the sewer main prior to
installation of the tie-in wye assembly.
D.Â
The sewer main tie-in assembly shall consist of an
appropriately sized PVC wye, two short lengths of PVC transition pipe
with spigot ends, and two PVC repair couplings (for PVC sewer main
tie-ins) or two flexible couplings (for tie-ins to vitrified clay,
AC transite, steel or other types of sewer main pipe).
E.Â
All couplings, pipe, wyes and other materials shall
be examined, prior to installation, and shall be clean and free of
any injurious defects. The PVC wye and repair coupling gaskets shall
be free of any cuts, slices, abrasions or other defects which could
interfere with a proper fit of all pieces. The flexible coupling gaskets
shall be free of any cuts, slices, abrasions or other defects. The
flexible coupling body shall be free of any cracks, inclusions, dents
or other defects. The threads on the flexible coupling bolts and collar
shall be free of cracks, burrs, rust or other defects which could
interfere with the proper fit and function of the coupling and tie-in
assembly.
F.Â
The tie-in assembly shall be installed and shall not
allow any exfiltration of wastewater from the sewer main or infiltration
of groundwater into the sewer main.
When the building sewer connection or other
appurtenant structures may be subject to vehicular traffic, the system
should be designed and constructed to withstand H-20 wheel loads.
A.Â
During the construction project, soil erosion can
be a major contributing factor to environmental pollution. In order
to minimize the effect of sedimentation, washouts, etc., during construction
activity, erosion control devices may need to be installed for the
duration of the construction.
B.Â
The form and design of the controls will vary with
the type of area that is to be protected and the anticipated cause
of the environmental degradation. In most situations the type and
location of controls can be determined during the design phase; however,
field conditions may require a reevaluation of the controls needed
during construction.
C.Â
Erosion control methods must be submitted to the Department
of Public Works for review and approval.
Gravity sewers may not be available to service
a basement or other below-ground area. In such situations the sanitary
sewage shall be lifted, by a pumping system or other approved means,
and discharged to the building sewer. Before design is begun the Department
of Public Works should be contacted to determine the availability
of service for below-grade connections.
The preceding standards are based on known and
accepted engineering practice and theory. The Town of Barnstable Department
of Public Works will give reasonable consideration and review of alternate
designs or technologies, which may be available, that transport and
discharge sanitary sewage to a municipal sewer system and treatment
facility.
