A.
Every building or place where humans reside, assemble
or are employed shall be provided with a sanitary method of human
excreta disposal. It shall be the duty of the owner of any such place
or building to provide a sanitary method of excreta disposal approved
by the Environmental Health Department and consistent with the provisions
of all City codes and building permits.
B.
The use of an individual sewage disposal system by
more than one property dwelling or other premises is prohibited.
C.
All buildings within 100 feet of a public sewer must
connect to the public sewer per NH RSA 147:8.
D.
No building permit shall be issued until a sewage
disposal approval has been issued by the New Hampshire Department
of Environmental Services, and a sewage disposal system construction
permit has been granted by the Environmental Health Department, if
any work contemplated requires such approval or permit.
E.
No certificate of occupancy approving any change in
configuration or use of land or buildings shall be issued without
a valid certificate of compliance issued by the Environmental Health
Department indicating that a satisfactory disposal system has been
located, constructed, altered or repaired.
F.
No existing individual sewage disposal system shall
be repaired or altered unless a sewage disposal system construction
permit has been applied for and granted by the Environmental Health
Department. No permit to repair or alter such system shall be granted
if a public sewer abuts the property for which the permit is requested,
except upon a showing to the Health Officer, confirmed by the City
Engineer, that it would be impossible or highly unreasonable to require
connection of the units served by the existing system to the public
sewer. This restriction does not prohibit pumping of septic tanks,
repairs of plumbing lines preceding the septic tank, or other necessary,
normal or routine maintenance.
No earth pit privy shall be constructed, operated
or maintained within the City.
Septage will be accepted at a designated receiving
structure within the publicly owned treatment works at such times
established by the Superintendent, provided the septage does not contain
toxic pollutants or materials and does not violate any other special
requirements established by the City, including but not limited to
biotoxicity. Permits to use the septage receiving structure shall
be under the jurisdiction of the Board of Public Works. The discharge
of industrial waste as industrial septage requires prior approval
of the NHDES. Fees for dumping septage will established as part of
the sewer use fees. The Superintendent shall have authority to limit
the disposal of septage if disposal would interfere with the operation
of the publicly owned treatment works. Procedures for the disposal
of septage shall be in conformance with the operating policy of the
City's wastewater treatment facility and disposal shall be accomplished
under the Superintendent's supervision unless specifically permitted
otherwise.
A.
No construction shall be commenced until a sewage
disposal system construction permit has been obtained from the Environmental
Health Department. Applications for a sewage disposal construction
permit shall be made on forms provided by the Environmental Health
Department and shall be accompanied by all required information.
B.
No sewage disposal system construction permit shall
be issued when, in the opinion of the Health Officer, engineering
data, soils information and similar pertinent data show that normal
use of the contemplated system could reasonably be expected to violate
this chapter or where requiring connection to the public sewer is
feasible and reasonable.
C.
In determining a suitable form and appropriate location
for a sewage disposal system, consideration shall be given to the
size, shape and slope of the lot, natural and adjusted drainage, existing
and known future water supplies, depth to groundwater and impervious
material, and room for future expansion of the disposal system.
E.
Permits issued pursuant to approved applications shall
be valid for not more than 180 days from the date issued. Failure
to achieve a certificate of compliance prior to expiration of the
construction permit shall require reapplication in the same manner
as an original application.
G.
Sewage disposal systems utilizing a septic tank and
subsurface drainage system shall be constructed according to the current
provisions and recommendations of the Water Division of the New Hampshire
Department of Environmental Services.
H.
Disposal trenches.
(1)
The size and spacing requirements of disposal trenches
shall conform to the following table:
|
Time for One Inch Fall
(minutes)
|
Minimum Width of Trench at Bottom
(inches)
|
Minimum Depth of Filter Stone Under Piping
(inches)
|
Minimum Distance Between Pipes
(feet)
|
Depth of Trench
(inches)
| |
|---|---|---|---|---|---|
|
Less than 5
|
18
|
6
|
6
|
20 - 30
| |
|
5 to 20
|
24
|
8
|
6
|
22 - 32
| |
|
21 to 40
|
30
|
10
|
7.5
|
24 - 34
|
(2)
All disposal trenches shall also meet the following
requirements:
(a)
Maximum width of trench at bottom: 36 inches.
(b)
Minimum diameter of distribution piping: four
inches.
(c)
Minimum filter material over pipes: two inches.
(d)
Slope of distribution piping: two to six inches
in 100 feet.
(e)
Slope of trench floor: two to six inches in
100 feet.
(f)
Maximum slope of piping where siphon required:
four inches in 100 feet.
(g)
Minimum lines per field: two.
(h)
Maximum length per line: 100 feet.
(i)
Minimum length per line: 25 feet.
(j)
Maximum depth of pipe: 36 inches.
(k)
Minimum depth of top of pipe: 18 inches.
I.
Disposal beds. Disposal beds shall be construed in
accordance with the following table:
(1)
Minimum diameter of distribution piping: four inches.
(2)
Minimum filter material over pipes: two inches.
(3)
Minimum filter material under pipes: 12 inches.
(4)
Slope of distribution piping: two to six inches in
100 feet.
(5)
Slope of disposal bed slope: two to six inches in
100 feet.
(6)
Maximum slope of piping where siphon required: four
inches in 100 feet.
(7)
Minimum lines per field: two.
(8)
Maximum length per line: 100 feet.
(9)
Minimum distance between lines: four feet.
(10)
Minimum distance from edge of bed to nearest
distribution line: three feet.
(11)
Maximum depth of piping: 36 inches.
(12)
Minimum depth of top of piping: 18 inches.
The use of cesspools is prohibited except that
in emergency situations a cesspool may be temporarily permitted, subject
to any conditions of the Environmental Health Department.
In special cases where a system or part thereof
as prescribed in this chapter cannot be expected to function satisfactorily,
an alternate design which meets the conditions of the ordinances of
the City in principle may be approved. Written permission from the
Health Officer must be obtained prior to the installation of any nonconforming
part of an individual sewage disposal system or installation in a
manner otherwise than in compliance with the provisions of this chapter.
