[HISTORY: Adopted as indicated in article histories. Amendments
noted where applicable.]
[Adopted as Section 7 of the Plainville Board of Health Regulations]
A.
Disposal works construction permit.
(1)
No system or facility to be used for treating, neutralizing, stabilizing,
or disposing of wastewater from homes, public buildings, commercial
or industrial buildings, or any types of establishments, shall be
located, constructed, installed, operated, altered, or repaired until
a disposal works construction permit for such shall have been issued
by the Plainville Board of Health. No construction of any building
or facility which relies upon such wastewater system or facility shall
be allowed until a disposal system construction permit shall have
been issued by the Plainville Board of Health.
(2)
Such system or facility as regulated herein shall include, but not
be restricted to, sewers serving such facility, wastewater pumping
stations, wastewater treatment works, all wastewater treatment operations,
sludge treatment and management, disinfection, advanced waste treatment,
subsurface disposal and land treatment; wastewater recycling and reuse.
(3)
Such system or facility as regulated herein shall be referenced as
"small wastewater treatment plant" (SWWTP).
B.
Certificate of compliance and operations permit. No SWWTP as permitted
herein shall be placed in service, nor shall new buildings or facilities
or additions to existing buildings or facilities which rely upon such
SWWTP be occupied or used until the Plainville Board of Health has
issued a certificate of compliance and operations permit.
C.
Service area and limitations.
(1)
The SWWTP shall not serve a volume of sewage flow from any subject
project in excess of the aggregate volume that would be generated
by each lot, which could have constructed upon it, a septic system
installed and operated in full compliance with Title 5, the State
Environmental Code, and the regulations of the Plainville Board of
Health.
(2)
In order to provide adequate wastewater treatment capacity in the
event of a failure of said SWWTP, each residential lot connected to
a SWWTP shall be shown to have reserve area adequate to construct
a septic system in accordance with Title 5, the State Environmental
Code, and the regulations of the Plainville Board of Health.
A copy of all applications, reports, plans, specifications,
data, and supporting documents required by these regulations and by
the regulations of any other agency in connection with the approval
or operation and maintenance of the subject facility shall be submitted
to the Plainville Board of Health. In the case of requests for a Plainville
Board of Health action, such materials shall be submitted a minimum
of 90 days prior to the date upon which an action by the Plainville
Board of Health is desired. In the case of submittals to other agencies,
all material shall be submitted to the Plainville Board of Health
at the time of submittal to that agency. A Plainville Board of Health
system works construction permit will not be issued prior to approval
by the Massachusetts Department of Environmental Protection. Other
submittals shall be made in accordance with schedules as specifically
designated by the Plainville Board of Health.
A.
Federal, state, and local regulations. The applicant for any SWWTP
shall comply with all applicable federal, state, and Town regulations
as existing and may be amended from time to time. All data, reports
and plans designated by those regulations shall be submitted to the
Plainville Board of Health. All data required by these regulations
shall be promptly submitted to the Plainville Board of Health in a
timely fashion.
B.
Standards for design, operations, and maintenance.
(1)
These regulations herein do not and are not intended to cover all
aspects of engineering design, operation, and maintenance of SWWTPs.
Rather they outline the specific Plainville Board of Health interests
and policies that may not be adequately reflected in other existing
regulations, policies, and manuals. Where local regulations or specifications
herein are more strict, they shall prevail. Where regulations or specifications
or guidelines of other political subdivisions or agencies of jurisdiction
or as included herein are more strict, they shall prevail.
(2)
The applicant shall specifically follow the following regulations
and guidelines which address the various aspects for the systems and
facilities considered herein, and are incorporated as a part of these
regulations by reference where applicable.
|
MASSACHUSETTS DEPARTMENT OF ENVIRONMENTAL PROTECTION (DEP)
| |
|
Guidelines for the Design, Construction, Operation, and Maintenance
of Small Sewage Treatment Facilities with Subsurface Effluent Disposal
Title 5, The State Environmental Code
Groundwater Quality Standards
Groundwater Discharge Permit Program
| |
|
NEW ENGLAND INTERSTATE WATER POLLUTION CONTROL COMMISSION (NEIWPCC)
| |
|
Guidelines for the Design of Wastewater Treatment Works —
TR-16
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|
WATER POLLUTION CONTROL FEDERATION (WPCF — MOP #8)
| |
|
Manual of Practice No. 8 — Wastewater Treatment Plant
Design
| |
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RECOMMENDED STANDARDS FOR SEWAGE WORKS: GREAT LAKES —
UPPER MISSISSIPPI RIVER BOARD OF STATE SANITARY ENGINEERS
| |
|
(The 10 State Standards)
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WATER POLLUTION CONTROL FEDERATION (WPCF MOP — # 9)
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|
Manual Of Practice No. 9 — Sewer Design And Construction
(Same as AMERICAN SOCIETY OF CIVIL ENGINEERS Manual and Reports
on Engineering Practice No. 37)
| |
|
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
| |
|
Municipal Environmental Laboratory, "Design Information on Rotating
Biological Contractors" (EPA-60012-84-106)
|
(3)
For situations not covered by these regulations and guidelines, good
engineering practice, as determined by the Plainville Board of Health,
shall govern.
(4)
While it is recognized that certain modifications or exceptions may
be necessary where justified in unusual situations, any such modifications
or exceptions shall only be provided by application for variance to
the Plainville Board of Health. Any variances to these regulations
issued by the Plainville Board of Health shall comply with the provisions
outlined in the State Environmental Code, Title 5.
Certain basic principles shall be considered early in the planning
and design process in order to ensure that the SWWTP development process
will meet all requirements.
A.
Environmental compatibility.
(1)
The plans for the proposed system or facility shall take into account
all aspects of the public health and environmental quality protection.
Efforts shall be taken to preserve water supply, private property,
wetlands, wildlife habitat, recreational sites, historic sites, and
natural beauty.
(2)
The design shall be prepared so as to have the least possible adverse
impact on the public health and the environment.
(3)
The project proposal shall include evidence that the wastewater system
or facility will result in the least adverse impact on the public
health or the environment as compared with other possible wastewater
management alternatives for the project.
B.
General discharge and treatment requirements. No discharge from a
SWWTP shall result in degradation of ground- or surface waters in
a manner inconsistent with their proposed use. There shall be compliance
with all applicable water quality standards. The existing characteristics
of the receiving waters must be considered to ensure compliance. There
shall be no discharge into any wetland, stagnant waters, lakes, or
streams.
C.
Hydrogeological investigation. The applicant shall submit a hydrogeological
survey report, prepared by a qualified geotechnical engineer or hydrogeologist,
to show the impact of the subsurface discharge of the SWWTP on groundwater.
The report shall include a determination of the flow direction, contaminant
levels, extent of wastewater discharge plume, ground- and surface
waters affected, and any interaction with water supply, public or
private. This analysis shall be performed for the SWWTP design plan
and also for any other viable wastewater treatment or disposal strategy
for the project to be served.
D.
Wetlands and floodplains.
(1)
No portion of the SWWTP shall fall within 100 feet of wetlands or
the one-hundred-year floodplain. No portion of the subsurface disposal
works for a SWWTP shall be located less than 200 feet from a wetland
or the one-hundred-year floodplain. No component of the treatment
plant, except for underground piping, shall be constructed less than
two feet above the high water level in any area subject to flooding.
(2)
Such distances are considered "minimum" and may be increased by the
Plainville Board of Health if site-specific conditions warrant.
E.
General siting and design requirements.
(1)
SWWTP design shall include attenuation of odor or noise problems,
and shall satisfactorily address the general aesthetic appearance,
to both protect the operator and to satisfy neighborhood environmental
requirements.
(2)
Distances. No portion of the SWWTP shall be located less than the
following distances stated to the components listed as follows:
|
Minimum Acceptable Separation Distances in Feet
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|---|---|---|---|---|---|---|
|
Component
|
Plant Buildings
|
Pumping Station
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Subsurface Tank
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Leaching Area
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Sewer or Force Main
| |
|
Well*
|
100
|
100
|
100
|
400
|
50
| |
|
Water supply line
|
—
|
10
|
10
|
25
|
10
| |
|
Dwelling unit
|
100
|
50
|
50
|
100
|
—
| |
|
Subsurface drain
|
—
|
25
|
25
|
50*
|
5
| |
|
Property boundary
|
150
|
50
|
50
|
100
|
10
| |
|
Subsurface water*
|
100
|
100
|
100
|
200
|
50
| |
|
Wetland*
|
100
|
100
|
100
|
200
|
50
| |
|
NOTES:
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|---|---|---|
|
*
|
This distance may be required to be greater if the hydrogeological
evaluation indicates that contamination will occur at the stated distance.
| |
F.
Ultimate disposal of sludge and solids:
(1)
Provision for final or ultimate disposal of sludge and solids shall
be clearly indicated and established. The estimated quantity must
be stated; if sludge and solids are to be disposed of off site, the
final destination must be established prior to issuance of any permit.
The applicant must demonstrate, to the satisfaction of the Plainville
Board of Health, that the destination for the sludge and solids is
in compliance with all applicable federal, state, and local regulations
and, also is that it will reliably be available for such purpose for
the length of time that its use is required for the SWWTP.
G.
Treatment plant reliability.
(1)
The SWWTP shall be planned and designed so as to provide for maximum
reliability at all times. The facility shall be capable of operating
satisfactorily during power failures, flooding, peak loads, equipment
failure, and maintenance shutdowns. Such reliability shall be obtained
through the use of various design techniques which will result in
a facility which is virtually "fail safe."
(2)
Multiple units or dual compartments with unit drains shall be provided
for all processes, including disinfection facilities, so that draining,
cleaning, repairing, or replacing, and other maintenance can be provided
without omitting any treatment processes.
H.
Bypasses and overflows. No bypasses, either upstream of or at the
SWWTP, shall be permitted.
I.
Disinfection. Disinfection of the SWWTP effluent by ultraviolet irradiation
or ozonation shall be required.
A.
Groundwater. The bottom interface of any subsurface disposal or leaching
facilities shall be located a minimum of five feet above the maximum
elevation of the groundwater or saturated soil zone. This elevation
shall include consideration of the mounding effect of the groundwater
caused by the discharge of the SWWTP effluent. Such analysis shall
be calculated using generally acceptable analytical or numerical methods.
When geologic conditions permit, the "Hantush" Formula and procedure
may be used. When the assumptions of that procedure cannot be met
to derive a reliable result, it shall be required to utilize such
method as finite difference equations for groundwater flow and elevation.
B.
Distance to bedrock. The bottom interface of any subsurface disposal
or leaching facilities shall be located a minimum of 10 feet above
the elevation of bedrock or impervious soil layer. "Impervious soil"
shall be defined as having a percolation rate of greater than 20 minutes
per inch.
C.
Thickness of permeable soil. A depth of at least five feet of naturally
occurring permeable soil shall be maintained below the bottom of the
leaching area. To be considered permeable, the soil shall have a percolation
rate of 20 minutes per inch or less.
The lateral sewer system serving the SWWTP shall be of a design
and construction in accordance with Water Pollution Control Federation
Manual of Practice No. 9. Adequate capacity shall be provided for
peak flow rates and shall provide for a cleansing velocity of at least
two feet per second at 75% of the estimated peak discharge. For low
service connection areas, peak flow rate shall be calculated by the
fixture unit method as described in MOP No. 9. The minimum pipe size
allowed shall be eight inches in diameter.
A.
Installation.
(1)
The permittee shall install, at a minimum, groundwater monitoring
wells in accordance with the following:
(2)
Screen depths for the cluster wells shall be set at elevations such
that at least two screen depths will yield samples at time of seasonal
low groundwater (e.g., September sampling period).
(3)
Such locations shall be as approved by the Plainville Board of Health
and as indicated appropriate from the results of the hydrogeological
investigation. Monitor wells shall be installed and in place prior
to issuance of the certificate of compliance and operations permit.
B.
Groundwater elevation. The permittee shall determine and provide
the Plainville Board of Health with elevations of the water table
to the nearest 1/100 of a foot in all monitor wells on a monthly basis.
Effluent limitations shall be as required by DEP regulations
for Class I and Class II groundwaters. All groundwaters are considered
to be in this classification unless proved to be otherwise following
procedures set forth by DEP.
A.
Wastewater.
(1)
Treatment plant influent. The influent to the treatment plant shall
be sampled and tested weekly for five-day biochemical oxygen demand
(BOD) and total suspended solids.
(2)
Treatment plant effluent.
(a)
The effluent from the treatment plant shall be sampled and tested
as follows:
|
Daily
|
Flow
|
pH
|
Specific Conductance
| |
|
Weekly
|
5-day biochemical oxygen demand (BOD)
Total suspended solids (TSS)
Coliform bacteria
Fecal coliform bacteria
| |||
|
Monthly
|
Total Kjeldahl nitrogen
Ammonia Nitrogen
Nitrate Nitrogen
Total Dissolved Solids
Sodium
| |||
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Semiannually
|
Oil and grease
Volatile Organic Compounds (USEPA Procedure No. 624)
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|
Annually
|
Arsenic
|
Copper
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Barium
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Zinc
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Cadmium
|
Mercury
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Chromium
|
Total Trihalomethanes
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|
Fluoride
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Selenium
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|
Lead
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Silver
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|
5 Years
|
Pesticides
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|
Radioactivity
| |||
(b)
All sampling and analysis, except for the daily and weekly frequency
tests which will commence at time of plant startup, shall be performed
initially at 60 days after plant startup and at the stated frequency
thereafter.
B.
Groundwater monitor wells.
(1)
Monitoring well testing in the up-gradient and down-gradient wells
shall be performed semiannually in the months of April and September
for all parameters designated above as semiannually or more often.
Testing for other parameters shall be at the stated frequency, either
annually or every five years during the month of April.
(2)
On an annual basis, the Plainville Board of Health, either on its
own motion or upon written request from the permittee, may review
the sampling frequency and the tested parameters and may modify either
or both if it deems it necessary.
A.
Operator.
(1)
A certified waste water treatment plant operator having the grade
appropriate for the plant as determined by the regulations of the
Board of Certification of Operators of Waste Water Treatment Facilities
shall be retained by the permittee.
(2)
Such operator shall spend a minimum of three hours per day at the
plant. When conditions warrant as may be determined by the Plainville
Board of Health, additional hours shall be required. Such operator
shall be designated the Chief Operator and shall be responsible for
the operation of the SWWTP.
B.
Backup operator. A second certified waste water treatment plant operator,
having the same grade as the Chief Operator, shall be available in
the absence of the Chief Operator.
C.
Operational guarantee. Prior to issuance of the certificate of compliance
and operations permit, the permittee shall provide security in an
amount specified by the Plainville Board of Health to guarantee the
operation of the SWWTP for a period of at least one year. The security
shall provide for salaries, operational costs, and cost for immediate
replacement, if necessary, of a major unit operation of the plant,
or in the event of plant failure to operate, an amount sufficient
to cover the costs of hauling 100% of the wastewater to another facility
for disposal for a one-year period.
