[Amended 7-9-1984; 1-21-1986 by TOR-85-4; 5-15-2006 by TOR-2006-2]
A.
Sewer permits.
(1)
No authorized person shall uncover, make any connections
with or opening into, use, alter or disturb any public sewer without
first obtaining a written permit from the Superintendent.
(2)
Any person proposing a new discharge into the system
or a substantial change in the volume or character of pollutants that
are being discharged into the system shall notify the Superintendent
at least 45 days prior to the proposed change or connection.
(3)
In the case of industrial users, an industrial discharge permit shall also be required under § 175-49, Industrial pretreatment program requirements, prior to the issuance of a permit under this section. If an industrial discharge permit is amended, modified, suspended or revoked, then the permit issued under this section shall also be amended, modified, suspended or revoked.
B.
Storm drain permits.
(1)
Applicability.
(a)
The following projects shall be required to
comply with the requirements of a storm drain permit:
(b)
Exemptions.
[1]
Normal maintenance and improvement of land in
agriculture as defined by the Wetlands Protection Act regulation 310
CMR 10.4.
[2]
Stormwater discharges resulting from the activities of Subsection B(1)(a) and (b) which are subject to jurisdiction of the Wetlands Protection Act and demonstrate compliance with the Massachusetts Storm Water Management Policy as reflected in an order of conditions issued by the conservation Commission shall fall under the DEP's jurisdiction for compliance and enforcement.
[3]
For total parcel areas less than three acres
which have proposed alterations of less than 10% of the parcel(s),
unless the nature of the proposed change is such that a significant
impact on adjacent properties or downstream structures is anticipated.
Changes at a site may not be split or phased in order to use this
exemption repeatedly. This exemption is at the complete discretion
of the DPW.
[4]
The down slope area to the alteration is left
in a natural state and undisturbed such that impacts are anticipated
to be insignificant.
[5]
The DPW Superintendent may waive strict compliance
with any requirement of this SD permit or rules and regulations hereunder.
(2)
Permits and procedures.
(a)
Application. A completed application for a storm
drain permit shall be filed with the Department of Public Works. Approval
must be obtained from the DPW before the beginning of land-disturbing
activities that may result in the disturbance of an area of an acre
or more and/or an alteration of a site of an acre. Approval to proceed
with site changes will be contingent on the application submission's
completeness, demonstration of compliance with design standards and
inspections.
(b)
Inspections.
[1]
Inspections by DPW shall be scheduled as follows.
[a]
After placement of erosion control
BMPs (This will be before beginning of land-disturbing activities
or clearing.)
[b]
Before backfilling of any underground
drainage utilities or structures.
[c]
Walk through to determine final
punch list of items remaining.
[d]
Final inspection upon completion
of all construction and stabilization of disturbed areas.
[e]
Random inspections may be conducted
to ensure compliance with the permit provisions.
[2]
DPW access to make inspections. The filing of
an application for a storm drain permit with the DPW shall be deemed
as the property owner's permission to the Department of Public Works
to have the right to enter the property at reasonable times and in
a reasonable manner for the purpose of inspections. Included in the
right to enter a property is when the permitting authority has a reasonable
basis to believe that a violation of this chapter is occurring or
has occurred, and to enter when necessary for the abatement of a public
nuisance or correction of a violation of the conditions of the storm
drain permit or this chapter.
(c)
Reporting.
[1]
Short-term. Periodic construction phase reporting
on erosion and sediment control best management practices (BMP) inspections,
maintenance, and repairs may be required. Reporting requirements will
be determined by the location, size, and potential adverse impact
of a specific project. Reports will be made by the owner to the DPW.
[2]
Long-term. The owner may be required to report
operation, inspections, maintenance, and repair activities of the
site drainage system to the DPW. This will be dependent on the location,
size, and potential adverse impacts of a specific site. Reports will
be made annually by the owner to the DPW by January 31 for the previous
calendar year.
(d)
Enforcement. The Department of Public Works
or an authorized agent of the DPW shall enforce this chapter, regulations,
orders, violations notices, and enforcement orders, and may pursue
all civil and criminal remedies for such violations.
[1]
Civil relief. If a person violates the provisions
of this chapter, regulations, permit, notice, or order issued thereunder,
the city may seek injunctive relief in the court of competent jurisdiction
restraining the person from activities which would create further
violations or compelling the person to perform abatement or remediation
of the violation.
[2]
Orders.
[a]
The DPW or an authorized agent
of the DPW may issue a written order to enforce the provisions of
this chapter or the regulations thereunder, which may include:
[b]
If the enforcing person determines
that abatement or remediation of contamination is required, the order
shall set forth a deadline by which such abatement or remediation
must be completed. Said order shall further advise that, should the
violator or property owner fail to abate or perform remediation within
the specified deadline, the city may, at its option, undertake such
work, directly or through a contractor, and expenses thereof shall
be charged to the violator.
[c]
Within 30 days after completing
all measures necessary to abate the violation or to perform remediation,
the violator and the property owner will be notified of the costs
incurred by the city, including administrative costs.
(3)
Rules and regulations. The Department of Public Works
may adopt, and periodically amend DPW policies relevant to the administration
of this chapter. These policies shall pertain to erosion and sediment
control, design guidelines, materials and construction specifications
and other issues related to public drainage system.
[Amended 5-15-2006 by TOR-2006-2]
All costs and expenses incident to the installation
and connection of the building sewer or storm drain on-site system
shall be borne by the owner.
A separate and independent building sewer shall
be provided for any building required to have sewage collection and
treatment by a proper government authority, with the following exception:
all multiple-family complexes, a commercial complex, or an industrial
complex which has a privately owned and maintained collector system.
Old building sewers may be used in connection
with new buildings only when approved, in writing, by the Superintendent.
[Amended 5-15-2006 by TOR-2006-2]
The size, slope, alignment and materials of
construction of a building sewer and the methods to be used in excavating,
placing 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 Town. In the absence
of code provisions or in amplification thereof, the materials and
procedures set forth in appropriate specifications of the American
Society for Testing and Materials and the WPCF Manual of Practice
No. 9 shall apply.
[Amended 5-15-2006 by TOR-2006-2]
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 means approved by the Town's Plumbing
Inspector and discharged to the building sewer.
[Amended 5-15-2006 by TOR-2006-2]
No person shall make connection of roof downspouts,
exterior or interior 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.
[Amended 5-15-2006 by TOR-2006-2]
A.
The connection of the building sewer into the public
sewer shall conform to the requirements of the Commonwealth of Massachusetts
Plumbing Code, 248 CMR: Board of State Examiners of Plumbers and Gas
Fitters/Building and/or other applicable rules and regulations of
the Town, or the procedures set forth in appropriate specifications
of the American Society for Testing and Materials and the WPC Manual
of Practice No. 9. All such connections shall be made gastight and
watertight.
B.
Restaurants, banquet facilities, commercial kitchen
requirements. Any facilities at which on-site food preparation, food
processing, food-handling, food service, or other related activities
which may result in fats, oils, and grease being introduced into the
waste stream will be required to design, install, and maintain an
oil/water/grease interceptor/separator appropriate for the intended
use. No wastes other than those requiring treatment or separation
shall be discharged into any interceptor or separator.
[Amended 9-20-2010by TOR-2010-5]
C.
Vehicle storage/maintenance facilities. Any commercial
facilities which store vehicles, wash vehicles, and perform vehicle
maintenance will be required to design, install, and maintain an oil
and water, sand and other substance separator, and to seal existing
interior floor drains which outlet to the public drainage or sanitary
sewer systems. This may also apply to facilities where motor oils,
gasoline, antifreeze and similar hazardous liquid wastes are potentially
generated or may potentially spill. The system must comply with the
Massachusetts Plumbing Code. Sanitary service piping must be such
that only wastes requiring treatment or separation shall be discharged
into the interceptor or separator.
D.
Existing use. Existing sites with uses as described in Subsections B and C shall have until September 1, 2011, to install required equipment and make required changes to the site. Failure to meet this deadline will be considered a violation of the sewer permit for the site. Charges shall be assessed by the Department of Public Works to the owner of any property which falls under Subsections A, B, and C above to cover materials, labor, equipment, and administrative costs incurred by the Agawam DPW as a result of noncompliance, plugged sewer mains, plugged sewer services and otherwise excessive fats, oil, grease and/or grit inappropriately being discharged or deposited into the Town’s sanitary sewer system. Additionally, the owner shall be subject to other enforcement actions as described in § 175-54.
[Amended 9-20-2010by TOR-2010-5]
[Amended 5-15-2006 by TOR-2006-2]
A.
Sewer permit.
(1)
Application. The applicant for a building sewer permit
or sanitary sewer connection permit shall make application on a special
form furnished by the Town. The permit application shall be pertinent
in the judgment of the Superintendent.
(2)
Sewer service connection size material, and appurtenances,
such as cleanouts, oil and water separators, shall be installed by
the owner as directed by the DPW. The applicant for the building sewer
permit shall notify the Superintendent when the building sewer is
ready for inspection and connection to the public sewer. The connection
shall be made under the supervision of the Superintendent or his/her
representative.
B.
Storm drain permit.
(1)
A storm drain permit shall be required for projects as described in § 175-22B. The application shall include the following information, which shall be reflected in the completed application form and permit package.
(2)
Storm drain (SD) permitting requirements. The following
components will be required to receive a storm drain permit at the
discretion of the Superintendent of the Department of Public Works.
(a)
Application. This shall identify the site location,
size of parcel(s), name of larger project this site is a part of,
owner information, builder/contractor information, project description.
(b)
Stormwater management plan.
[1]
The purpose of the Stormwater Management Plan
is to ensure that the runoff from a site has been treated for water
quality and quantity impacts during the construction of the project
and during the long term. This treatment includes, but is not limited
to, erosion and sediment control to the extent practicable via structural
and nonstructural BMPs during construction and the establishment of
structural BMPs for long-term controls.
[2]
The Superintendent of the Department of Public
Works may require and alter as he sees fit the components of the Stormwater
Management Plan. All components of the Stormwater Management Plan
shall be prepared and stamped by a licensed professional engineer.
That engineer shall be available during the construction phase to
advise the builder of any alterations required to protect resource
waters and adjacent properties as needed from water volume and water
quality impacts due to the project.
[a]
Temporary measures. This shall
include a written description of proposed temporary BMPs, a plan at
an appropriate scale of those BMPs, construction details, a description
of maintenance of proposed BMPs, a maintenance schedule, and reporting
requirements of erosion and sediment controls and on-site hazardous
materials handling and storage, dust control, off-site sedimentation
measures, plan and procedures, and certification by the contractor
and all subcontractors on the site of adherence to the described construction
phase plan. The Massachusetts Erosion and Sediment Control Guidelines
for Urban and Suburban Areas prepared for the Massachusetts DEP, and
others, shall be used as guidance for appropriate erosion and sediment
control measures. In addition, the DPW may prepare and make available
standards for temporary BMP measures and may update those standards.
[b]
Permanent measures. This shall
include a written description of proposed permanent BMPs, a plan at
a scale of not less than one inch equals 40 feet of those BMPs, construction
details, computations in an acceptable format, a description of long-term
maintenance of proposed BMPs, a long-term maintenance schedule, and
reporting requirements for maintenance and inspections as specified
by the DPW. The DPW shall prepare and make available the full standards
for permanent BMP measures and may update those standards.
[c]
Maintenance. A description of long-term
maintenance and inspection schedules shall be submitted for site development
projects.
[d]
Construction certification statement.
A statement to be signed by the contractor and all relevant subcontractors
shall be included in the SWM plan certifying that they have read and
understand the construction phase requirements and agree to comply.
[e]
Certificate of completion. Once
all work has been complete, a final inspection has occurred, and the
installation has been approved, the DPW shall issue a certificate
of completion.
(c)
Inspections.
[1]
Compliance inspections shall be required as
determined by the Department of Public Works Superintendent or agent.
If in the course of inspections by DPW personnel of temporary or permanent
BMPs, it is determined that water resources or the MS4 is not being
adequately protected, or that information submitted by the applicant
in reporting to the DPW is inadequate, has missing information, or
is insufficient, enforcement action will proceed at a level which
is appropriate at the discretion of the DPW given the level of the
perceived offense.
[2]
Construction phase inspections shall be conducted
by the owner or designee as required to determine the adequacy of
erosion and sediment controls. Depending on the results of those inspections,
sediment control BMPs shall be repaired, maintained, or improved as
necessary.
[3]
Operations inspections. The owner or designee
is responsible for performing all maintenance inspections as described
in the stormwater management plan. Those inspections must be of adequate
frequency and timing to determine the functioning of short-term and
long-term stormwater BMPs. If deficiencies are found, they must be
remedied in a timely fashion. Adverse impacts off site which are due
to deficiencies in the functioning or maintenance of short-term or
long-term BMPs are the responsibility of the storm drain permit applicant.
The right to enter adjacent properties and affect repairs/remediation
shall be the full responsibility of the storm drain permit applicant.
(d)
Maintenance. The SD permit applicant shall be
responsible for adequate maintenance of BMPs described in the stormwater
management plan for short-term and long-term control measures.
(e)
Reporting. Reporting requirements shall be based
upon the overall size of the project, the nature of proposed changes,
existing and proposed site conditions, the proximity of water resource,
and other pertinent factors. Reporting may include construction phase
reports, final or as-built reports, and annual maintenance reports
— Upon the completion of the work the permittee shall submit
a Final Storm Drain Report (including certified as-built construction
plans) from a Professional Engineer (P.E.) or surveyor (RLS), certifying
that all stormwater management devices (catch basins, pipes, detention
devices, outlet control structures, vegetated swales, channel improvements)
and erosion and sediment control devices, and approved changes and
modifications, have been completed in accordance with the conditions
of the approved permit. Any discrepancies should be noted in the cover
letter.
(f)
Review/approval of storm drain permit. The review
and approval by the DPW of information submitted for compliance with
the storm drain permit does not relieve the applicant of full responsibility
for the adequate protection of water resources as required by state
and federal law, or to remediate any adverse impacts to downstream
or adjacent properties adversely impacted by new runoff flow paths
or flow regimes. If, in the course of the construction and/or ongoing
maintenance of the proposed BMPs, it is determined by the DPW, the
Town, or any other authority which has jurisdiction over the protection
of water resources that the measures currently implemented are inadequate,
the owner of the site shall be responsible for implementing improvements,
adequate maintenance, and inspections of the protection measures such
that the resource and adjacent properties are protected.
(g)
Certification statement. The storm drain permit
applicant and the builder/contractor certify that they shall comply
with the stormwater management plan, including all short-term and
long-term inspections, maintenance/repairs, and operation of the drainage
system, and reporting requirements.
(h)
Storm drain permit/review fees. The fee for
review of any storm drain permit application shall be based on the
amount of land to be disturbed at the site and the fee structure established
by Code. That fee shall be due before the approval of the storm drain
permit or before the beginning of land-disturbing activities as appropriate.
All excavations for building sewer installation
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 Superintendent.
The Department of Public Works shall establish
a schedule of entrance fees and may amend the same from time to time.
All fees regarding the Sewer Use Ordinance shall require the approval
by the majority vote of the full Town Council. The entrance fee shall
be a unit charge for each dwelling or business unit serviced by a
direct or indirect connection made to a public sewer. This fee shall
be paid prior to any work being commenced by the Town or the owner
to effect such connection. A single-family house or one apartment
unit shall constitute one dwelling unit, and each individual business
in a shopping center or business complex shall constitute one business
unit. This fee shall be paid for each unit connected directly to the
Town's sewer system as well as for each unit which is later added
on to a sewer system which eventually deposits sewage into the Town
system. No building sewer permit or sanitary sewer connection permit
will be issued unless the person applying for the permit has paid
the required entrance fee.
Entrance fees as established under § 175-32 shall not include installation and connection costs. All costs and expenses incident to the installation and connection of the building sewers, the installation of or the connection of sanitary sewers or storm drains shall be borne by the owner. The owner shall indemnify the Town from loss or damage that may directly or indirectly be occasioned by the installation of the building sewer or the connection for the sanitary sewer or the storm drain. The Department of Public Works shall establish a schedule of charges for the installation and connection of building sewers and the installation of connections for sanitary sewers and storm drains and may amend the same from time to time. No building sewer permit or sanitary sewer connection permit or storm drain connection permit will be issued unless the person applying for the permit has deposited with the Town a certified check, payable to the Town of Agawam, in the amount determined by the Department of Public Works. In the event that the cost of the installation and connection of a building sewer or the installation of a sanitary sewer or storm drain connection exceeds the amount deposited with the Town by the owner, then the owner shall reimburse the Town for all costs exceeding the amount deposited. If the reimbursement is not made, the costs shall be considered a lien upon the property served by said building sewer.
All private sewers and drains laid by private
parties in any street, court or way open or proposed to be opened
for public travel and accommodation shall become public sewers or
drains when connected to public sewers or drains. After the adoption
of this chapter, no such sewer shall be connected with a public sewer
and no such drain shall be connected with a public drain until plans
showing size, material, construction, depth and location are approved
by the Superintendent and until the owner shall convey, in writing,
to the Town exclusive control over the same, with the right to enter
such street, court or way and dig up the same so far as necessary
for repairing and controlling such sewer or drain and making connections
therewith.
[Added 7-9-1984; amended 5-15-2006 by TOR-2006-2]
The stormwater management plan shall demonstrate
a comprehensive plan intended to address changes in runoff characteristics
due to a proposed construction project. Both short-term and long-term
alterations in flow paths, runoff volume, and runoff characteristics
must be addressed. The protection of regulated water resources is
required. The use of natural preexisting vegetation and/or the planting
of native species to provide runoff mitigation is strongly encouraged.
A.
Stormwater management performance standards. The Superintendent
of the Department of Public Works may alter the stormwater management
performance standards at his discretion. These standards do not relieve
the applicant from complying with all state and federal regulations.
B.
Construction erosion and sediment controls. Temporary
control measures to keep disturbed soils on the construction site,
prevent erosion and control and remove sedimentation due the construction
process. The Department of Public Works shall develop design guidelines
for this purpose. They shall be based upon Massachusetts Department
of Environmental Protection Erosion and Sediment Control Policies.
The erosion and sediment control plan shall be prepared by a registered
professional engineer.
C.
Permanent measures; runoff quality and quantity best
management practices.
(1)
New development. New commercial, industrial, and residential sites, unless exempted in § 175-22B, must comply with the stormwater management performance standards.
(2)
Redevelopment. Previously developed sites must meet
the stormwater management standards to the maximum extent practicable.
However, if it is not practicable to meet all the standards, the new
(retrofitted or expanded) stormwater management system must be designed
to improve existing conditions.
(a)
Stormwater management measures shall be required
to satisfy the control requirements and shall be implemented in the
following order of preference:
[1]
Flow attenuation and pollutant removal of runoff
on site to existing areas with grass, trees, and similar vegetation
and through the use of open vegetated swales and natural depressions
with appropriate stabilization measures to ensure long-term operation.
[2]
Stormwater detention pond for the temporary
storage of runoff, which is designed so as not to create a permanent
pool of water.
[3]
Stormwater retention structures for the permanent
storage of runoff by means of a permanent pool of water. This type
of system will not be allowed for subdivisions.
[4]
Retention and evaporation of stormwater on rooftops
or in parking lots. This type of system will not be allowed for subdivisions.
(b)
Peak flow rates. Peak flow rates for the post-construction
conditions must not exceed the peak flow rates for the preconstruction
condition for one-hundred-year twenty-four-hour design storm events.
The two-year twenty-four-hour, ten-year twenty-four-hour post-construction
peak flow rate must be mitigated to the maximum extent practicable.
(c)
Minimize pollutants. Best management practices
shall be employed to minimize pollutants in stormwater runoff prior
to discharge into a separate storm drainage system or water body.
Runoff from parking lots over two acres shall be treated by oil and
water separators or other controls to remove oil and sediment.
(d)
Projects involving the storage or use of hazardous
chemicals or petroleum products shall incorporate handling and storage
best management practices that prevent such chemicals from contaminating
runoff from the site into infiltration systems, receiving water bodies,
or the MS4, and shall include a list of such chemicals in the application.
(e)
Connection to MS4. If the destination for the
outlet of a detention system is the MS4, the applicant must evaluate
the existing capacity and condition of that system. If there are existing
deficiencies or extra capacity is not available to accept additional
flows from the project site, the applicant will be required to design
and construct improvements or reduce the outlet flow rate based on
existing capacity.
(f)
Emergency overflow. All detention ponds shall
be designed to provide an emergency overflow system, and incorporate
measures to provide a nonerosive velocity to flow along its length
and at any outfall.
(g)
Down stream structures. The designed release
rate of any stormwater structure shall be modified if any increase
in flooding or stream channel erosion would result at a down stream
dam, highway, structure, or normal point of restricted stream flow.
(h)
Centralized detention facilities. Certain industrial
areas have centralized detention facilities. The following describes
the allowed percent of impervious area before on-site detention is
required.
|
Site Location
|
Site Impervious Area Credit for Centralized
Detention
| |
|---|---|---|
|
Agawam Regional Industrial Park Bowles Road,
Almgren Drive, Abrahms Drive
|
25%
| |
|
Suffield St. Industrial Park Gold Street
|
50%
| |
|
Moylan Lane
|
25%
|
(i)
Detention ponds. The Department of Public Works
shall develop design guidelines for this purpose. These standards
may be updated from time to time. Public safety shall be considered
in the design of any stormwater facilities. Detention ponds on private
sites are encouraged to utilize the DPW design guidelines; at the
DPW's discretion certain design standards may not apply to private
sites. Detention ponds within easements to the Town must follow all
design standards as directed by the DPW Superintendent.
(j)
(Reserved)
(k)
(Reserved)
(l)
Detention pond maintenance requirements. Detention
ponds within easements to the Town of Agawam require minor maintenance
to be performed by the property owner on a regular basis.
[1]
Remove clogs to the outlet structure caused
by leaves, branches, grass clippings, or other debris.
[2]
All grassed areas must be mowed a minimum of
two times per year (spring and fall) to reduce weed growth. If areas
become bare, they must be reseeded to sustain vegetative cover.
[3]
Detention ponds and swales may not be filled
in or altered such that the intended design and functioning of the
drainage system is impaired.
[4]
Landscaping, fences, or other utilities or structures
may not be placed so that access to the detention pond or drainage
structures is impaired.
[5]
The area surrounding the fenced detention area
is to be kept landscaped or grassed.
(m)
Calculation submittals for review by the DPW
shall include the following components.
[1]
Locus map.
[2]
Site plan. This plan must include all relevant
information for the hydrologic modeling of the site. Information shall
include preconstruction and post-construction conditions at the same
scale, which is appropriate for complexity and size of the project.
[3]
Existing conditions and proposed impact mitigation;
description/investigation of both up-gradient conditions which release
runoff to the site and down-gradient areas which are the destination
of the runoff from the site in question. The extent of this investigation
must be such that the project designer and the DPW reviewer can have
a good understanding of existing conditions, including flow paths,
flooding conditions, flow-limiting structures, wetlands or other water
resources' ability to withstand current runoff flow rates and volumes.
Proposed structures and improvements must be such that they extend
far enough down stream to mitigate the proposed development and increases
in impervious areas.
[4]
Soil survey information; copy of Hampden County
Soil Survey Map with site clearly outlined at the scale of the map.
Copy must be clear such that soil type and hydrologic soil group can
be determined. Also, list the soil types, and relevant characteristics
for the purpose of modeling the project's runoff.
[5]
Hydrologic modeling data. All areas shall be
modeled utilizing the TR 55 or TR 20 method of drainage calculation
as appropriate. Submittals shall include the following information.
Submittals will not be reviewed until complete information is given
in an easy-to-follow format. The use of tables, summaries, and accompanying
back-up data is strongly encouraged.
[a]
Drainage subarea designations and
outline locations for pre- and post-construction condition.
[b]
Time of concentration path location,
path length, surface grade, soil type boundary location for pre- and
post-construction condition.
[c]
Modeling method description.
[d]
Model data for pre- and post-construction
conditions, including model of all proposed flow rate control structures.
[e]
Model output for pre- and post-construction
conditions, including model of all proposed flow rate control structures.
[f]
Preconstruction peak flow rate
and post-construction peak flow rate at all design points for the
site.
[6]
Design storm events. One-hundred-year twenty-four-hour
storm event: post-construction must not exceed the preconstruction
peak flow rate. Two-year twenty-four-hour, ten-year twenty-four-hour
peak flow rates must be mitigated to the maximum extent practicable.
[7]
Detention pond design. Seasonal high groundwater
elevation must be determined by a certified soil evaluator or certified
professional soil scientist for the proposed location of the detention
pond. There must be a one-foot separation between the lowest elevation
of the detention pond and the seasonal high groundwater elevation.
The side slopes of the detention pond must not exceed 3:1 and have
a sinuous shape. Contributing area for each detention pond shall be
a maximum of 10 acres. It shall be less depending on the characteristics
of the preconstruction site drainage pathways. An overland spillway
shall be included such that if the capacity of the detention pond
is exceeded or the outlet becomes temporarily clogged, a defined overland
flow path has been established which is adequately reinforced to resist
erosion and to protect adjacent property from drainage flows.
[8]
Outlet to water resources. Structures shall
adequately dissipate energy of outlet effluent such that down stream
wetlands, brooks, streams, and adjacent properties are not damaged
by any increase in peak flows due to construction phase and post-construction
conditions. Analysis of downstream conditions and natural drainage
features ability to adequately handle construction phase and post-construction
flow will be performed, analyzed, and reported as part of the storm
drain permit application. Appropriate remediation of down stream structures
must be proposed.
[9]
Summary table of peak flow comparisons of pre-
and post-development runoff rates for the appropriate design storm
depending on the location relative to protected resource waters.
D.
Operation and maintenance, Long-Term.
(1)
An operation and maintenance manual shall be developed
by the project designer for the owner's use once construction on the
proposed system is complete. The manual will include a description
of each component of the drainage system, inspections, maintenance,
and the frequency of each for continued operation of the system.
(2)
See § 175-30B(5) for reporting requirements.
E.
Owner/contractor certification statement; performance;
and certificate of completion.
(1)
Certification. The owner or authorized representative
and all contractors and subcontractors shall sign certification statements
as part of the permit application and the stormwater management plan.
In signing the plan, the authorized representative certifies that
the information is true and assumes liability for the plan. Official
signatures provide a basis for an enforcement action to be taken against
the person signing the document.
(a)
The owner certification statement shall read:
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"I certify under penalty of law that this document
and all attachments were prepared under my direction or supervision
in accordance with a system designed to assure that qualified personnel
properly gathered and evaluated the information submitted. Based on
my inquiry of the person(s) who manage the system, or those persons
directly responsible for gathering the information, the information
submitted is, to the best of my knowledge and belief, true, accurate,
and complete.
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(b)
Contractors and subcontractors certification
statement.
[1]
Contractors and subcontractors certification
statement shall read:
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"I certify under penalty of law that I understand
the terms and conditions of the Storm Drain Permit that authorizes
stormwater discharges associated with industrial activity from the
construction site identified as part of this certification."
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[2]
The storm drain permit application shall list
all contractors and subcontractors who will implement the measures
identified in the stormwater management plan.
(2)
Performance.
(a)
Subdivisions. The storm drain permit requirements
shall be included in the Planning Board's bond amount for subdivision
construction, in that the subdivision plans shall reflect the requirements
of the DPW storm drain permit. The bond amount for the drainage system
shall reflect all structures proposed in the public way and within
easements to be given to the Town for drainage purposes.
(b)
Site plans. The DPW will request that the building
occupancy permit be withheld until the DPW has issued a storm drain
certificate of compliance for the proposed drainage system.
(3)
Storm drain permit certificate of compliance. A certificate
of compliance shall be issued by the Department of Public Works once
the following has been completed.
(a)
A final inspection of the completed work by
the Town Engineer.
(b)
Certification by a P.E. or R.L.S of the design
volume of detention facilities.
(c)
Submission of storm drain final report as described in § 175-30B(2)(e).
F.
Storm drain permit fees. The Department of Public
Works may charge fees for application review and inspections.
(1)
Application fees shall be charged as follows, based
upon the project area of disturbance. The fee shall be due at the
time of permit application before review begins.
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Permit Application Fees
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|---|---|---|
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Parcel Area or Area of Disturbance
(acres)
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Fee
| |
|
1 to 5
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$200
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Above 5 to 20
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$700
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|
Above 20 to 50
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$1,500
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|
Above 50
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$1,500 plus $25 per acre above 50
| |
(2)
Inspection fees shall be charged as follows, based
upon the project area of disturbance. The fee shall be due before
land-disturbing activities begin.
|
Inspection Fees
| ||
|---|---|---|
|
Parcel Area or Area of Disturbance
(acres)
|
Fee
| |
|
1 to 5
|
$100
| |
|
Above 5 to 20
|
$350
| |
|
Above 20 to 50
|
$750
| |
|
Above 50
|
$750 plus $10 per acre above 50
| |
(3)
Determination of area of disturbance category. If
the area of the parcel(s) and area of project disturbance differ such
that the area of disturbance will be in a lower fee category, the
applicant may submit a certified statement by the project designer,
a P.E., of the project's area of disturbance. If during construction
the area of disturbance is expanded, the greater fee will be due before
the certificate of completion will be issued. Emergency remediation,
not included in the originally approved permit but required due to
field conditions, outside of the project site will not be included
in this area.
