[CC 1979 §68.100; Ord. No. 1487 Art. I §§1 — 23, 5-16-1985]
Unless the context specifically indicates otherwise, the meanings
of terms used in this Article shall be as follows:
The quantity of oxygen utilized on the biochemical oxidation
of organic matter under standard laboratory procedure in five (5)
days at twenty degrees centigrade (20°C), expressed in milligrams
per liter.
That part of the lowest horizontal piping of a drainage system
which receives the discharge from soil, waste and other drainage pipes
inside the walls of the building and conveys it to the building sewer,
beginning five (5) feet (1.5 meters) outside the inner face of the
building wall.
The extension from the building drain to the public sewer
or other place of disposal.
A sewer receiving both surface runoff and sewage.
Solid wastes from the domestic and commercial preparation,
cooking and dispensing of food and from the handling, storage and
sale of produce.
The liquid wastes from industrial manufacturing processes,
trade or business as distinct from sanitary sewage.
Any outlet into a watercourse, pond, ditch, lake or other
body of surface or ground water.
Any individual, firm, company, association, society, corporation
or group.
The logarithm of the reciprocal of the weight of hydrogen
ions in grams per liter of solution.
The wastes from the preparation, cooking and dispensing of
food that have been shredded to such a degree that all particles will
be carried freely under the flow conditions normally prevailing in
public sewers with no particle greater than one-half (½) inch
(1.26 centimeters) in any dimension.
A sewer in which all owners of abutting properties have equal
rights and is controlled by public authority.
A sewer which carried sewage and to which storm, surface
and ground waters are not intentionally admitted.
Human excreta and wastewater, including bath and toilet waste,
residential laundry waste, residential kitchen waste and other similar
waste from household or establishment appurtenances. Sewage and domestic
sewage waste are further categorized as:
Any arrangement of devices and structures used for treating
sewage.
All facilities for collection, pumping, treating and disposing
of sewage.
A pipe or conduit for carrying sewage.
Is mandatory; MAY: Is permissive.
Any discharge of water, sewage or industrial waste which
in concentration of any given constituent or in quantity of flow exceeds
for any period of duration longer than fifteen (15) minutes more than
five (5) times the average twenty-four (24) hour concentration of
flows during normal operation.
A sewer which carried storm and surface waters and drainage,
but excludes sewage and industrial wastes, other than unpolluted cooling
water.
The Superintendent of Sewage and/or Water Pollution Control
of the City of Sullivan or his/her authorized deputy, agent or representative.
Solids that either float on the surface of, or are in suspension
in water, sewage or other liquids and which are removable by laboratory
filtering.
A channel in which a flow of water occurs, either continuously
or intermittently.
[CC 1979 §68.110; Ord. No. 1487 Art. II §§1 — 4, 5-16-1985; Ord. No. 2638 §1(68.110 (4), (5)), 6-6-2000]
A.
Unlawful To Place Garbage On Public Or Private Property. It shall be unlawful for any person to place, deposit or permit to
be deposited in any unsanitary manner on public or private property
within the City of Sullivan, or in any area under the jurisdiction
of said Sullivan, any human or animal excrement, garbage, or other
objectionable waste.
B.
Unlawful To Discharge Sewage To Any Natural Outlet. It shall
be unlawful to discharge to any natural outlet within the City of
Sullivan, or in any area under the jurisdiction of said City, any
sewage or other polluted waters, except where suitable treatment has
been provided in accordance with subsequent provisions of this Article.
C.
Privy, Septic Tank, Etc., Prohibited. Except as hereinafter
provided, it shall be unlawful to construct or maintain any privy,
privy vault, septic tank, cesspools or other facility intended for
use for the disposal of sewage.
D.
Buildings Must Have Toilet Facilities. The owner of all
houses, buildings or properties used for human employment, recreation
or other purposes, situated within the City and abutting on any street,
alley or right-of-way in which there is now located or may in the
future be located a public sanitary or combined sewer of the City,
is hereby required at his/her expense to install suitable toilet facilities
therein and to connect such facilities directly with the proper public
sewer in accordance with the provisions of this Article within two
hundred ten (210) days after date of official notice to do so, provided
that said public sewer is within one hundred (100) feet (30.5 meters)
of the property line.
E.
Violation Constitutes Misdemeanor. Each day or any part
thereof in which such violation occurs or continues to occur shall
constitute a separate violation. In accordance with this municipal
Code any owner of land located within the City of Sullivan who violates
any of the provisions of the regulation hereof shall be guilty of
a misdemeanor and shall, upon conviction, be punished by a fine not
to exceed one hundred dollars ($100.00) for each violation.
[CC 1979 §68.115; Ord. No. 2584 §1(68.115), 7-20-1999]
A.
Applicability. These regulations shall apply to all individual wastewater systems as defined in Section 705.110 of these regulations.
B.
Abandonment Procedures. On-site sewage disposal systems
containers including, but not limited to, septic tanks, aerobic tanks,
holding tanks, lagoons, cesspools, privies, distribution boxes, valve
boxes and pumping tanks, shall be pumped by a waste hauler and removed,
collapsed or filled with a suitable material including, but not limited
to, clean bank run gravel, dirt or crushed limestone.
[CC 1979 §68.120; Ord. No. 2173 §1, 12-20-1994; Ord. No. 2175 §1(68.120(3)), 1-17-1995]
A.
Applicability. These regulations shall apply to all individual wastewater systems as defined in Section 705.110 of these regulations.
B.
Prohibitions. No person shall, except when authorized by
permit issued pursuant to this Section and these regulations:
1.
Construct, install or modify any small wastewater system or an individual
sewage disposal system.
2.
Construct, install or modify a facility not in compliance with the
terms and conditions of an issued permit. The applicant shall provide
a copy of the real estate tax bill showing the assessing identification
number or a copy of the legal description of the property and the
name of the owner of record of the property.
3.
Construct, install or modify a facility with a permit that has expired
or has been suspended or revoked.
C.
Lot Size Requirements.
1.
No permit shall be issued for any private sewage disposal system
employing subsurface soil absorption facilities where the area of
the lot is less than thirty thousand (30,000) square feet. In addition,
the width of the lot in the area of septic tank and absorption field
shall be a minimum of one hundred twenty (120) feet wide.
2.
Lots platted prior to the adoption of this Code (December 20, 1994)
shall be allowed to install an individual sewage disposal system on
a twenty thousand (20,000) square foot lot but shall comply with all
other requirements of this Article. If an existing lot is smaller
than twenty thousand (20,000) square feet and requires replatting,
then they shall comply with the thirty thousand (30,000) square foot
requirement.
D.
Permit Required — Control of Construction — Installation
And Modification Permits — Responsibility On Issued Permits
— Exceptions.
1.
Construction, installation or modification of small wastewater facilities
shall be allowed only in accordance with the terms and conditions
of permits issued pursuant to the provisions of these regulations.
2.
No construction, installation or modification of a small wastewater
system or individual sewage disposal system shall be allowed unless
a permit to construct, install or modify has been obtained from the
administrative authority.
3.
The issuance of a permit to construction a small wastewater system
does not relieve the permittee of its responsibility to properly plan,
design, call for inspections, construct, operate and maintain the
facility described in the application and permit conditions.
E.
Application Requirements. The following procedures will
be followed in applying for a permit:
1.
Any person who proposes to construct, install or modify a facility required to be permitted under Section 705.100(C) shall submit a written application on forms provided by the administrative authority.
2.
The application for a permit to construct, install or modify must
be accompanied by two (2) copies of plans, specifications, design
data or other pertinent information covering the project and any additional
information required by the administrative authority. The applicant
shall provide a copy of the real estate tax bill showing the assessing
identification number or a copy of the legal description of the property
and the name of the owner of record of the property.
3.
All plans and specifications must conform to the minimum design standards
adopted by the administrative authority.
F.
Application Processing Procedures. All permit applications
received will be processed in the following manner:
1.
The administrative authority shall review each application and take
final action within fifteen (15) days from the date the application
is received.
2.
Incomplete applications will not be processed.
3.
All plans and specifications must meet or exceed minimum design standards
and these regulations.
4.
Each application must be submitted with all supporting data necessary
for review. Processing of the application with respect to recommendations
or required changes will be done in accordance with the provisions
of applicable Statutes, rules and regulations of the administrative
authority.
5.
The administrative authority shall promptly notify the applicant
of the final action taken on the application. If the conditions of
the permit are different from the proposed application submitted by
the applicant for review, the notification shall include reasons for
the changes made.
6.
If upon review of an application the administrative authority determines
that a permit should not be granted, the administrative authority
shall notify the applicant of the permit denial and state the reason
for denial.
7.
If the applicant is dissatisfied with the conditions or denial of any permit issued by the administrative authority, he/she may request a hearing in accordance with Section 705.100(H)(2).
G.
Construction And Operation In Compliance With Issued Permit. The permittee shall:
1.
Conduct all construction, installation or modification of any facility permitted consistent with the terms and conditions of the permit. Unauthorized changes, deviations or modifications will be a violation of the permit. A new application or amended application must be filed with the City administrative authority to obtain modification of a permit. No modification shall be implemented until a new or modified permit has been issued or a waiver given pursuant to Subsection (G)(2).
2.
Request for authorization to utilize materials and/or procedures
different from those specified in the terms of the issued permit.
Such requests shall be directed to the administrative authority. A
waiver may be granted if materials and/or procedures specified in
the permit cannot be obtained or accomplished and alternative materials
and procedures meet minimum standards. In order to prevent undue delay
during construction, the administrative authority may grant a waiver
orally, upon oral request, provided that this request is duly noted
on the permit.
3.
Conduct the operation in accordance with statements, representations
and procedures presented in the complete application and supporting
documents, as accepted and authorized by the Administrator.
4.
Notify the City of Sullivan Engineering Department at least twenty-four
(24) hours prior to backfilling of system. The administrative authority
will perform an inspection of the installation (1) prior to any rock
placement and (2) prior to backfilling of absorption trench with topsoil
to insure compliance with these regulations. The compliance section
of the permit will then be signed. If no inspection is called for,
the following actions may be taken:
H.
Duration And Termination Of Permits — Transfer Of Permits.
1.
The duration of construction, installation or modification permits
will be variable but shall not exceed one (1) year from the date of
issuance. The expiration date shall be recorded on each permit issued.
Those permits issued without a specified expiration date will be in
force no more than one (1) year from date of issuance.
2.
Permits shall be issued only to the official applicant of record,
who must be the owner of the permitted facility, of only the type
of construction of record:
a.
Within sixty (60) days after sale or exchange of the facility unless application for transfer is received pursuant to Subsection (H)(3) of this Section.
b.
When construction is completed. However, conditions included in the
permit will remain in effect throughout the life of the facility.
c.
Upon issuance of a new, renewed or modified permit.
d.
Upon written request of the permittee.
3.
Permits shall be transferred to new owners by completion and submission
of ownership transfer forms by the new owner to the administrative
authority. The new owner shall also submit a written request from
the existing owner to transfer ownership. The administrative authority
shall act within thirty (30) days after receipt of the request.
4.
Any conditions established in a construction, installation or modification
permit will be automatically transferred to the new owner whenever
a transfer of ownership of the facility occurs.
I.
Renewal Of Permit. A permit may be renewed where construction
has not been completed by contacting in writing the administrative
authority stating that where will not be any changes in the plans
for construction, installation or modification of a permitted facility
not less than thirty (30) days prior to the expiration date of the
permit.
J.
Denial Of A Permit.
1.
The administrative authority may deny a permit for any of the following
reasons:
a.
The application is incomplete or does not meet applicable minimum
design and construction standards as specified by minimum design standards;
b.
The project, if constructed, may cause violation of applicable ground
water standards;
c.
No new individual disposal system shall be approved for a property
which is located within one hundred (100) feet of a City sanitary
sewer to which connection is practical;
d.
Other justifiable reasons which must be provided in writing by the
administrative authority.
2.
If the administrative authority proposes to deny issuance of a permit,
the applicant shall be notified of the intent to deny and the reason
for denial.
3.
In the case of denial of a permit by the administrative authority,
the applicant, if he/she so desires, may request a hearing. A request
for hearing shall be made in writing within forty-five (45) days of
notification of the denial to the Board of Aldermen and shall state
the grounds for the request. Any hearing shall be conducted pursuant
to the regulations of the Board of Aldermen.
K.
Modification Of A Permit. Either before construction is
completed upon a permitted facility or during the review of a proposed
facility application, the Administrative Authority may, for good cause,
modify a construction permit.
1.
When reviewing an application or before construction on a facility
is completed, the administrative authority may modify a permit due
to the following reasons:
a.
Existing, unknown or changing site conditions which would prevent
construction and resultant operation from complying with the department's
regulations;
b.
Location of the building and/or the sewage system is changed from
the original plans;
c.
Incomplete application on review items where the applicant agrees
with the modification;
d.
Review items not in compliance with minimum standards where the applicant
agrees with the modifications;
e.
Any other reason necessary to implement applicable Statutes, standards
or regulations.
2.
The administrative authority shall notify the permittee of intent
to modify the permit.
3.
Such notification shall include the proposed modification, the reasons
for modification and the time frame to have modifications constructed,
installed or operational. Modification requirements shall be implemented
before construction, installation or modification of a facility is
completed.
4.
The modification shall become final within ten (10) days from the
date of such notice unless within that time the permittee requests
a hearing before the Board. Such request for hearing shall be made
in writing to the administrative authority and shall state the grounds
for the request. Any hearing held shall be conducted pursuant to the
regulations of the Board.
5.
A copy of the modification permit shall be forwarded to the permittee
as soon as the modification becomes effective.
L.
Suspension Or Revocation Of A Permit. The administrative
authority may suspend or revoke a permit before construction, installation
or modification of a facility is completed for the reasons set forth
below in subparagraph (2).
1.
Before a permit may be suspended or revoked, the permittee shall
be given an opportunity to show compliance with all lawful requirements
for the retention of the permit.
2.
The administrative authority shall notify the permittee of its intent
to suspend or revoke the permit in the event that it becomes necessary
due to:
a.
A non-compliance with the terms of the permit;
b.
Unapproved modifications in design or construction;
c.
False information submitted in the application;
d.
Changing site conditions which would result in violations of applicable
regulations;
e.
Any other reason necessary to implement applicable Statutes, standards
or regulations.
3.
The notification shall include the reasons for suspension or revocation.
4.
The suspension or revocation shall become final ten (10) days from
the date of such notice unless within that time the permittee requests
a hearing before the Board. Such a request for hearing shall be made
in writing to the administrative authority and shall state the grounds
for the request. Any hearing held shall be conducted pursuant to the
regulations of the Board.
M.
Schedule Of Fees. Individual sewage disposal permit fees shall be as set out in Section 160.300 of this Code.
N.
Enforcement.
1.
Whenever the department has reasonable grounds for believing that
there has been a violation of this Code or any rule or regulation
adopted pursuant thereto, the department shall give written notice
to the person or persons alleged to be in violation. Such notice shall
identify the provision of this Code or regulation issued hereunder
alleged to be violated and the facts alleged to constitute such violation.
2.
Such notice shall be serviced in the manner required by law for the service of process upon person in a civil action and may be accompanied by an order of the administrative authority requiring remedial action which, if taken within the time specified in such order, will effect compliance with the requirements of this Code and regulations issued hereunder. Such order shall become final unless a request for hearing as provided in Section 705.100(J)(3) of this Code is made within ten (10) days from the date of service of such order. In lieu of such order, the department may require the person or persons named in such notice to appear at a hearing at a time and place specified in the notice.
3.
The department is authorized to require the property owner to take
necessary action to correct a malfunctioning individual sewage disposal
system within ten (10) days of being notified after which each day's
failure to take corrective action shall be deemed a separate offense.
O.
Violation Constitutes Misdemeanor. Each day or any part
thereof in which such violation occurs or continues to occur shall
constitute a separate violation. In accordance with this municipal
Code, any owner, lessee or tenant of land located within the City
of Sullivan who violates any of the provisions of the regulation hereof
shall be guilty of a misdemeanor and shall, upon conviction, be punished
by a fine not to exceed two hundred dollars ($200.00) for each violation.
P.
Conflict With Other Laws. The provisions of any law or regulation
of any municipality, the State of Missouri or Federal agency establishing
standards affording greater protection to the public health or safety
shall prevail within the jurisdiction of such municipality over the
provisions of this regulation adopted hereunder.
Q.
Severability. If any portion of this municipal Code is for
any reason held invalid or unconstitutional by any court of competent
jurisdiction, that portion shall be deemed a separate, distinct and
independent provision and that holding shall not effect the validity
of the remaining portion of this Code.
[CC 1979 §68.125; Ord. No. 2175 §2(68.125(4)), 1-17-1995]
A.
General.
1.
ADMINISTRATIVE AUTHORITY
AERATION UNIT
ALTERNATIVE
BAFFLE
BEDROCK
BEDROOM
BUILDING SEWER
CAPACITY
DISTRIBUTION PIPES
DOSING CHAMBER (OR PUMP PIT OR WET WELL)
DOSING DEVICE
DWELLING
GRAVELESS SYSTEM
GRAY WATER
HOLDING TANK
IMPERMEABLE
INDIVIDUAL SEWAGE TREATMENT SYSTEM
INTERMITTENT SAND FILTERS
MOTTLING
MOUND SYSTEM
OTHER ESTABLISHMENT
PERCOLATION RATE
PLASTIC LIMIT
ROCK FRAGMENTS
SEPTAGE
SEPTIC TANK
SETBACK
SEWAGE
SEWAGE FLOW
SEWAGE TANK
SEWAGE TANK EFFLUENT
SITE
SLOPE
SOIL CHARACTERISTICS - LIMITING
SOIL TREATMENT AREA
SOIL TREATMENT SYSTEM
STANDARD SYSTEM
TOILET WASTE
TRENCH ROCK
VALVE BOX
WATER TABLE
WATERTIGHT
Definitions. Definitions as set forth in the Missouri
Clean Water Law and 10 CSR 2-2.010 shall apply to those terms when
used in this Code unless the context clearly requires otherwise or
as defined herein. For the purposes of these standards, certain terms
or words used here shall be interpreted as follows. The word "shall" is mandatory and the words "should" and "may" are permissive. All distances, unless
otherwise specified, shall be measured horizontally.
The City of Sullivan Engineering Department.
Any sewage tank which utilizes the principle of oxidation
in the decomposition of sewage by the introduction of air into the
sewage.
An individual sewage treatment system employing methods and devices as presented in Subsection (F) of this Section.
A device installed in a septic tank for proper operation
of the tank and to provide maximum retention of solids. This includes
vented sanitary tees and submerged pipes in addition to those devices
normally called baffles.
That layer of parent material which is consolidated and unweathered.
Any room within a dwelling that might reasonably be used
as a sleeping room.
That part of the drainage system which extends from the end
of the building drain and conveys its discharge to an individual sewage
treatment system.
The liquid volume of a sewage tank using inside dimensions
below the outlet.
Perforated pipes or agricultural drain tiles used to distribute
sewage tank effluent in a soil treatment.
A tank or separate compartment following the sewage tank
which serves as a reservoir for the dosing device.
A pump, siphon or other device that discharges sewage tank
effluent from the dosing chamber to the soil treatment system.
Any building or place used or intended to be used by human
occupants as a single-family or two-family unit.
An absorption system comprised of large diameter, eight (8)
and ten (10) inches corrugated plastic pipe, perforated with holes
on a one hundred twenty degree (120°) are centered on the bottom,
wrapped in a sheath of spun bonded nylon filter wrap and installed
level in a trench without gravel bedding.
Liquid waste from a dwelling or their establishment produced
by bathing, laundry, culinary operations, from floor drains and specifically
excluding toilet waste.
A watertight tank for storage of sewage until it can be transported
to a point of approved treatment and disposal.
With regard to bedrock, a bedrock having very few cracks
or crevices and having a vertical permeability less than one (1) inch
in twenty-four (24) hours shall be considered impermeable. With regard
to soils, a soil horizon or layer having a vertical permeability less
than one (1) inch in twenty-four (24) hours shall be considered impermeable.
A sewage treatment system or part of a system serving a dwelling(s)
or other establishment(s) which utilizes subsurface soil treatment
and disposal and distributes fifteen hundred (1,500) gallons per day
or less of domestic sewage per day.
Intermittent sand filters are beds of granular materials
twenty-four (24) to thirty-six (36) inches deep underdrain by graded
gravel and collecting tile. Wastewater is applied intermittently to
the surface of the bed through distribution pipes or troughs and the
bed is underdrained to collect and discharge the final effluent. Uniform
distribution is normally obtained by dosing so as to flood the entire
surface of the bed. Filters may be designed to provide free access
(open filters) or may be buried in the ground (buried filters or subsurface
sand filters). Effluent from intermittent sand filters shall be discharged
to a soil absorption system.
A zone of chemical oxidation and reduction activity appearing
as splotchy patches of red, brown, orange and gray in the soil.
A system where the soil treatment area is built above the
ground to overcome limits imposed by proximity to water table or bedrock
or by rapidly or slowly permeable soils.
Any public or private structure other than a dwelling which
generates sewage.
The time rate of drop of a water surface in a test hole as
specified herein.
A soil moisture content below which the soil may be manipulated
for purposes of installing a soil treatment system and above which
manipulation will cause compaction and puddling.
The percentage of rock fragments in a soil that are greater
than two (2) millimeters in diameter or retained on a No. 10 sieve
which may include chert, sandstone, shale, limestone or dolomite.
The amount of rock fragments in a soil is of a concern in areas of
residual soils overlying highly permeable bedrock.
Those solids and liquids removed during periodic maintenance
of a septic or aeration unit tank or those solids and liquids removed
from a holding tank.
Any watertight, covered receptacle designed and constructed
to receive the discharge of sewage from a building sewer, separate
solids from liquid, digest organic matter, store liquids through a
period of detention and allow the clarified liquids to discharge to
a soil treatment system.
A separation distance measured horizontally.
Any water-carrying domestic waste, exclusive of footings
and roof drainage, from any industrial, agricultural or commercial
establishment or any other structure. Domestic waste includes, but
is not limited to, liquid waste produced by bathing, laundry, culinary
operations, liquid wastes from toilets and floor drains and specifically
excludes animal waste and commercial process water.
Flow as determined by measurement of actual water use or,
if actual measurements are unavailable, as estimated by the best available
data provided by 10 CSR 20-8.020 Small Sewage Works Design Guide.
A watertight tank used in the treatment of sewage which includes,
but is not limited to, septic tanks and aeration units.
That liquid which flows from a septic or aeration unit under
normal operation.
The area bounded by the dimensions required for the proper
location of the soil treatment system.
The ratio of vertical rise or fall to horizontal distance.
Those soil characteristics which preclude the installation
of a standard system including, but not limited to, evidence of water
table or bedrock closer than three (3) feet to the ground surface
and percolation rates slower than one hundred twenty (120) minutes
per inch. Also the amount of rock fragments in areas of significant
potential for ground water contamination.
That area of trench or bed bottom which is in direct contact
with the trench rock of the soil treatment system.
A system where sewage tank effluent is treated and disposed
of below ground surface by filtration and percolation through the
soil. It includes those systems commonly known as seepage bed, trench,
drainfield, disposal field and includes mound and low pressure pipe
systems.
An individual sewage treatment system employing a building
sewer, sewage tank and the soil treatment system commonly known as
seepage bed or trenches, drainfield or leachfield.
Fecal matter, urine, toilet paper and any water used for
slushing.
Clean rock, washed creek gravel, durable and decay-resistant
material free from dust, sand, silt or clay. The size shall range
from three-fourths (¾) inch to two and one-half (2½)
inches. (Limestone is not allowed.)
Any device which can stop sewage tank effluent from flowing
to a portion of the soil treatment area. This includes, but is not
limited to, caps or plugs on distribution or drop box outlets, divider
boards, butterfly valves, gate valves or other mechanisms.
The highest elevation in the soil where all voids are filled
with water, as evidenced by presence of water or soil mottling or
other information. This includes perched and zones of saturation for
long periods of time.
Constructed so that no water can get in or out below the
level of the outlet.
2.
Applicability. For these standards, "on-site
wastewater treatment and disposal system" means all equipment
and devices necessary for proper conduction, collection, storage,
treatment and disposal of wastewater from a dwelling or other facility
serving the equivalent of fifteen (15) persons, fifteen hundred (1,500)
gallons per day or less. Included within the scope of this definition
are building sewers, septic tanks, subsurface absorption systems,
mound systems, intermittent sand filters, graveless systems and aeration
unit wastewater treatment systems.
3.
Minimum setback distances. All on-site wastewater
treatment and disposal systems shall be located in accordance with
the distances shown in Table I.
|
TABLE I
| ||||
|---|---|---|---|---|
|
Minimum Distance in Feet From
|
Sewage Tanks (1)
|
Disposal Area (2)
| ||
|
Private water supply well
|
50
|
100
| ||
|
Public water supply well
|
300
|
300
| ||
|
Classified stream, lake or impoundment
|
50
|
50
| ||
|
Stream or open ditch (3)
|
25
|
25
| ||
|
Property line
|
10
|
10
| ||
|
Building foundation
|
5
|
15
| ||
|
Basement
|
15
|
25
| ||
|
Water line under pressure
|
10
|
10
| ||
|
Suction water line
|
50
|
100
| ||
|
Upslope interceptor drains
|
*
|
10
| ||
|
Downslope interceptor drains
|
*
|
25
| ||
|
Top of slope of embankments or cuts of 2 feet or more vertical
heights
|
*
|
20
| ||
|
Other soil absorption system except repair area
|
*
|
20
| ||
|
(1) Includes sewage tanks, intermittent sand filters and dosing
chambers.
| ||||
|
(2) Includes subsurface absorption systems. Does not include
wastewater stabilization ponds.
| ||||
|
(3) Sewage tanks and soil absorption systems should never be
located in the drainage area of a sinkhole.
| ||||
4.
Sewage flow rates. In determining the volume of
sewage from single-family dwellings, the minimum flow rate shall be
one hundred twenty (120) gallons per day per bedroom. The minimum
volume of sewage from each single-family dwelling shall be two hundred
forty (240) gallons per day and each additional bedroom above two
(2) bedrooms shall increase the volume of sewage by one hundred twenty
(120) gallons per day. When the occupancy of a single-family dwelling
exceed two (2) persons per bedroom, the volume of sewage shall be
determined by the maximum occupancy at a rate of sixty (60) gallons
per person per day.
a.
Other establishments. For establishments or housing
developments other than a single-family residence, 10 CSR 20-8.020
Subsection (11)(B) shall be used to estimate the sewage flow rate.
Values for estimated sewage flow derived from 10 CSR 20-8.020 for
establishments having food service operations shall be increased by
a factor of one and one-half (1½) to compensate for the high
organic strength.
B.
Site Evaluation.
1.
All proposed sites for new on-site sewage treatment and disposal
systems shall be evaluated for the following:
a.
Soil conditions, properties and permeability, including depth to
limited permeability layers (>120 mpi);
b.
Slope;
c.
The existence of lowlands, local surface depressions, rock outcrops
and sinkholes;
e.
Surface water flooding probability;
f.
Location of easements and underground utilities; and
g.
Amount of available area for the installation of the system and an
area for replacement.
2.
Procedure for site evaluations.
a.
Percolation tests and soil excavations. Site evaluation
shall consist of at least three (3) percolation tests and at least
two (2) soil borings or excavations. This evaluation shall be conducted
by an engineer with education and experience in evaluating soil characteristics
in the field. With this type of site evaluation, determination of
suitability of a site and sizing may be done for standard or alternative
soil absorption systems. The following criteria must be followed:
(1)
Percolation tests shall be conducted in accordance with Subsection (B)(2)(b) of this Section. Also the percolation test should be conducted at the bottom of the proposed soil absorption system bottom even when the bottom will be at a depth less than twenty-four (24) inches.
(2)
Each boring or excavation shall be made to a depth at least
three (3) feet deeper than the bottom of the proposed system or until
bedrock or a water table is encountered, whichever is less. A soil
texture description shall be recorded by depth and notations made
where texture changes occur. Particular effort shall be made to determine
restrictive horizons. The borings or excavation shall be located at
least fifty (50) feet apart towards the ends of the proposed absorption
fields.
(3)
Extreme care should be taken to determine the highest known
water table by recording the first (1st) occurrence of mottling observed
in the hole or, if mottling is encountered, the open holes in clay
or loam soils shall be observed after standing undisturbed a minimum
of sixteen (16) hours and depth to standing water, if present, shall
be measured.
(4)
Other prominent features such as structure, stoniness or roots
should be noted by horizon. In areas where there is a significant
potential for ground water contamination, the administrative authority
may require that the percentage of rock fragments be determined on
each soil layer or horizon.
(5)
General color and color variation (mottling) should be indicated
by horizon.
b.
Percolation test procedure.
(1)
A minimum of three (3) percolation tests are required with two
(2) of the holes around the periphery and one (1) in the middle of
the proposed soil absorption site.
(2)
Each test hole shall be six (6) to eight (8) inches in diameter,
have vertical side walls and be bored or dug to a depth of twenty-four
(24) inches or to the bottom of the proposed soil absorption system,
whichever is greater.
(3)
The bottom and sides of the hole shall be carefully scratched
to remove any smearing and to provide a natural soil surface into
which water may penetrate. All loose material shall be removed from
the bottom of the test hole and two (2) inches of one-fourth (¼)
to three-fourths (¾) inch gravel shall be added to protect
the bottom from scouring.
(4)
The hole shall be carefully filled with clear water to a minimum
of twelve (12) inches over the soil bottom of the test hole and maintained
for no less than four (4) hours. The hole shall then be allowed to
swell for at least sixteen (16) but no more than thirty (30) hours.
In sandy soils, the saturation and swelling procedure shall not be
required and the test may proceed if one (1) filling of the hole has
seeped away in less than ten (10) minutes.
(5)
In sandy soils adjust the water depth to eight (8) inches over
the soil bottom of the test hole. From a fixed reference point, the
drop in water level shall be measured in inches to the nearest one-eighth
(1/8) inch at approximately ten (10) minute intervals. A measurement
can also be made by determining the time it takes for the water level
to drop one (1) inch from an eight (8) inch reference point. If eight
(8) inches of water seeps away in less than ten (10) minutes, a shorter
interval between measurements shall be used but in no case shall the
water depth exceed eight (8) inches. The test shall continue until
three (3) consecutive percolation rate measurements vary by a range
of no more than ten percent (10%).
(6)
In other soils adjust the water depth to eight (8) inches over
the soil at the bottom of the test hole. From a fixed reference point
the drop in water level shall be measured in inches to the nearest
one-eighth (1/8) inch at approximately thirty (30) minute intervals,
refilling between measurements to maintain an eight (8) inch reference
point if a constant water depth of at least eight (8) inches has been
maintained for at least four (4) hours prior to the measurement.
C.
Reporting Of Site Evaluation Results And Proposed Design (New Systems).
1.
Percolation test results shall be shown on a worksheet which will
include all calculations and measurements.
2.
Site excavation results shall be clearly reported including a soil
texture description by depths. Engineer shall make note of any restrictive
horizons or highest water table location. Other factors that shall
be noted shall include percentage of rock fragments, roots and soil
structure all by soil layer.
3.
A site plan shall be drawn to scale which indicates the following:
4.
Engineering drawings which show the design for the proposed wastewater
treatment system.
D.
Reporting Procedures For Modification Of Existing Systems. The reporting requirements shall be identical to Section 705.110(B)(2) above with the exception of the site excavation and soil texture description which will not be required for the modification of an existing system.
E.
Building Sewers.
1.
Building sewers used to conduct wastewater from a building to an
on-site wastewater treatment and disposal system shall be constructed
of plastic pipe meeting the minimum requirements of American Society
for Testing and Materials (ASTM) Standards F 789 85 and D 3034 81,
Schedule 40 PVC or cast iron and all with approved type joints.
a.
Size. Building sewers shall not be less than four
(4) inches in diameter.
b.
Slope. Building sewers shall be laid to the following
minimum slope:
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4 inch sewer
|
12 inches per 100 feet
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|
6 inch sewer
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8 inches per 100 feet
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c.
Cleanouts. A cleanout shall be provided at least
every one hundred (100) feet and at every change in direction or slope
if the change exceed forty-five degrees (45°)
d.
Connection to sewage tank. The pipe going into and
out of the sewage tank shall be Schedule 40 PVC, cast iron or equivalent
and shall extend a minimum of two (2) feet beyond the hole of excavation
for the sewage tank.
F.
Sewage Tanks.
1.
General. All liquid waste and wastewater shall discharge
into the sewage tank. Roof, garage, footing, surface water, drainage
and cooling shall be excluded from the sewage tank. All sewage tank
effluent shall be discharged to a soil absorption system that is designed
to retain the effluent upon the property from which it originated.
All tanks regardless of material or method of construction shall:
a.
Be watertight and designed and constructed to withstand all lateral
earth pressures under saturated soil conditions with the tank empty;
b.
Be designed and constructed to withstand minimum of two (2) feet
of saturated earth cover above the tank top; and
c.
Not be subject to excessive corrosion or decay. Metal sewage tanks
shall not be used.
2.
Septic tanks. Septic tanks, regardless of material
or method of construction, shall conform to the following criteria:
a.
The liquid depth of any septic tank or its compartment shall be not
less than thirty (30) inches. A liquid depth greater than six and
one-half (6½) feet shall not be considered in determining tank
capacity.
b.
No tank or compartment shall have an inside horizontal dimension
less than twenty-four (24) inches.
c.
Inlet and outlet connections of the tank shall be submerged by baffles.
d.
The space in the tank between the liquid surface and the top of the
inlet and outlet baffles shall be not less than twenty percent (20%)
of the total required capacity, except that in horizontal cylindrical
tanks this space shall be not less than fifteen percent (15%) of the
total required liquid capacity.
e.
Inlet and outlet baffles shall be constructed of acid-resistant concrete,
acid-resistant fiberglass or plastic.
f.
Sanitary tees shall be affixed to the inlet or outlet pipes with
a permanent waterproof adhesive. Baffles shall be integrally cast
with the tank, affixed with a permanent waterproof adhesive or affixed
with stainless steel connectors top and bottom.
g.
The inlet baffle shall extend at least six (6) inches but no more
than twenty percent (20%) of the total liquid depth below the liquid
surface and at least one (1) inch above the crown of the inlet sewer.
h.
The outlet baffle and the baffles between compartments shall extend
below the liquid surface a distance equal to forty percent (40%) of
the liquid depth except that the penetration of the indicated baffles
or sanitary tees for horizontal cylindrical tanks shall be thirty-five
percent (35%) of the total liquid depth. They also shall extend above
the liquid surface as required herein. In no case shall they extend
less than six (6) inches above the liquid surface.
i.
There shall be at least one (1) inch between the underside of the
top of the tank and the highest point of the inlet and outlet devices.
j.
The invert shall be not less than three (3) inches above the outlet
invert.
k.
The inlet and outlet shall be located opposite each other along the
axis of maximum dimension. The horizontal distance between the nearest
points of the inlet and outlet devices shall be at least four (4)
feet.
l.
Sanitary tees shall be at least four (4) inches in diameter. Inlet
baffles shall be no less than six (6) inches or no more than twelve
(12) inches measured from the end of the inlet pipe to the nearest
point on the baffle. Outlet baffles shall be six (6) inches measured
from beginning of the outlet pipe to the nearest point on the baffle.
m.
Access to the septic tank shall be as follows:
(1)
There shall be one (1) or more manholes, at least twenty (20)
inches least dimension and located within six (6) feet of all walls
of the tank. The manhole shall extend through the cover to a point
within twelve (12) inches but no closer than six (6) inches below
finished grade. Manhole risers are not required when the top of the
tank is within twelve (12) inches of final grade. All manhole openings
must be provided with a substantial, fitted, watertight cover of concrete,
cast iron or other approved material. All manhole covers should be
covered with at least six (6) inches of earth. Manhole covers which
terminate above grade shall have an effective approved locking device.
n.
Compartmentation of single tanks shall be in accordance with the
following:
(1)
Septic tanks larger than fifteen hundred (1,500) gallons and
fabricated as a single unit shall be divided into two (2) or more
compartments;
(2)
When a septic tank is divided into two (2) compartments, not
less than one-half (½) nor more than two-thirds (2/3) of the
total volume shall be in the first (1st) compartment;
(3)
When a septic tank is divided into three (3) or more compartments,
one-half (½) of the total volume shall be in the first (1st)
compartment and the other half equally divided in the other compartments;
(4)
Connections between compartments shall be baffled so as to obtain
effective retention of scum and sludge. The submergence of the inlet
and outlet baffles of each compartment shall be as specified herein;
(5)
Adequate venting shall be provided between compartments by baffles
or by opening of at least fifty (50) square inches near the top of
the compartment wall; and
(6)
Adequate access to each compartment shall be provided by one
(1) or more manholes at least twenty (20) inches least dimension and
located within six (6) feet of all walls of the tank. The manhole
shall extend through the cover to a point within twelve (12) inches
but no closer than six (6) inches below finished grade, unless the
administrative authority requires otherwise.
o.
The use of multiple tanks shall conform with the following:
(1)
Where more than one (1) tank is used to obtain the required
liquid volume, the tank shall be connected in series;
(2)
Each tank shall comply with all other provisions of this Section;
(3)
No more than four (4) tanks in series can be used to obtain
the required liquid volume; and
(4)
The first (1st) tank shall be no smaller than any subsequent
tanks in series.
p.
The liquid capacity of a septic tank serving a dwelling shall be
based upon the number of bedrooms contemplated in the dwelling served
and shall be at least as large as the capacities given below.
|
Number of Bedrooms
|
Minimum Liquid
Capacity Gallons
| |
|---|---|---|
|
1 to 3
|
1,000
| |
|
4
|
1,250
| |
|
5
|
1,500
|
|
Note: These figures provide for use of garbage grinders, automatic
clothes washers and other household appliances.
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|
For six (6) or more bedrooms the septic tank shall be sized on the basis similar to an establishment. See Subsection (q) below.
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q.
For individual residences with more than five (5) bedrooms, multi-family
residences or any place of business or public assembly, the liquid
capacity of the septic tank shall be designed in accordance with the
following: V = 0.75Q - 1,125;
|
|
where
| |
|---|---|---|
|
|
V is the liquid capacity of the septic tank;
| |
|
|
and
| |
|
|
Q is the design daily sewage flow.
| |
3.
Location. Location of the sewage tank shall consider
the following:
a.
The sewage tank shall be placed so that it is accessible for the
removal of liquids and accumulated solids;
b.
The sewage tank shall be placed on firm and settled soil capable
of bearing the weight of the tank and its contents; and
c.
The sewage tanks shall be set back as specified in Section 705.110(A)(3) of the Code.
4.
Solids removal. The owner of any septic tank or
his/her agent shall regularly inspect and arrange for the removal
and sanitary disposal of septage from the tank whenever the top of
the sludge layer is less than twelve (12) inches below the bottom
of the outlet baffle or whenever the bottom of the scum layer is less
than three (3) inches above the bottom of the outlet baffle. Yearly
inspections of septic tanks are recommended.
5.
Aeration units. An aeration unit wastewater treatment
plant utilizes the principle of oxidation in the decomposition of
sewage by the introduction of air into the sewage. An aeration unit
may be used as the primary treatment unit instead of a septic tank
except where special local conditions may limit their use. All aeration
unit type treatment systems shall comply with the general requirements
for sewage tanks set forth herein and with the following:
a.
Limitations. Special conditions where aeration units
should not be used may include, but not be limited to, the following:
b.
General. The aeration unit shall be located where
it is readily accessible for inspection and maintenance. Setback distances
for aeration units shall be as specified herein.
c.
Design. All aeration units shall comply with National
Sanitation Foundation Standard No. 40 or as required by the administrative
authority. In addition, all aeration unit treatment plants shall comply
with the requirements stipulated in this Section. The aeration unit
shall have a minimum treatment capacity as identified herein.
d.
Effluent disposal. Effluent from an aeration unit
shall be discharged into a soil absorption system or other final treatment
system as specified herein. No reductions in the area of soil absorption
systems or other final treatment systems shall be permitted because
of the use of an aeration unit instead of a septic tank. Direct surface
discharge from an aeration unit treatment plant shall not be permitted.
e.
Operation and maintenance. Where aeration units
are used, institutional or administrative arrangements to control
their use, operation and maintenance are recommended. Aeration units
should be pumped at least once a year to remove excess solids from
the plant.
G.
Absorption Systems. The common design of absorption systems
is one using absorption trenches, each separate from the other and
each containing a distribution pipe. The type of system should be
used whenever practical. Other types of absorption systems may be
used as alternatives where the site conditions meet the specific design
requirements of the alternative systems.
1.
Absorption trenches. The absorption trench gives
additional treatment to the sewage from the treatment tank. Regardless
of its appearance of clarity or transparency, the outflow or effluent
from a sewage tank is a dangerous source of contamination. The satisfactory
operation of the sewage disposal system is largely dependent upon
the proper site selection, design and construction of the absorption
trench.
a.
Absorption trenches should not be constructed in soils having a percolation
rate slower than sixty (60) minutes per inch and in no case shall
absorption trenches be constructed in soils with percolation rates
slower than one hundred twenty (120) minutes per inch or where rapid
percolation may result in contamination of water-bearing formations
or surface waters.
b.
The absorption trench shall be located on the property to maximize
the vertical separation distance from the bottom of the absorption
trench to the seasonal high ground water level, as determined by the
presence of mottling, bedrock or other limiting layer. The vertical
separation between the bottom of the absorption trench and limiting
layer or seasonal high ground water table shall in no case be less
than two (2) feet for standard systems. Greater vertical separation
may be required where water-bearing formations are in danger.
c.
Absorption trenches shall not be constructed in unstabilized fill
or ground which has become severely compacted due to construction
equipment.
d.
The minimum area in any absorption trench system shall be in accordance
with Table II. The minimum size system shall be six hundred (600)
square feet.
|
Table II
| |||
|---|---|---|---|
|
Percolation Rate**
|
Absorption Area Square Feet/Bedroom*
|
Loading Rate Gallon/Square Feet*
|
Probable Soil Texture
|
|
1 — 10
|
165
|
1.0
|
Sand, Loamy Sand
|
|
11 — 30
|
250
|
0.8
|
Sandy Loam, Loam
|
|
31 — 45
|
300
|
0.45
|
Silt Loam, Clay Loam, Silty Clay Loam***
|
|
46 — 60
|
333
|
0.4
|
Silt Loam, Clay Loam, Silty Clay Loam***
|
|
61 — 120
|
600
|
0.2
|
Silty Clay, Sandy Clay, Clay****
|
|
*Gallons of sewage tank effluent per day per square foot of
trench bottom.
|
|
**Sands with percolation rates from one (1) to ten (10) minutes
per inch shall be evaluated for potential ground water contamination.
Absorption trenches in these highly permeable sands shall have
a minimum vertical separation of four (4) feet between the absorption
trench bottom and seasonal high ground water table or bedrock. Cherty
clays may have percolation rates between zero (0) and sixty (60) minutes
per inch. Cherty clay soils located in areas of potential ground water
contamination shall have less than fifty percent (50%) rock fragments
and a vertical separation distance of four (4) feet or more between
the absorption trench bottom and bedrock. Unlined absorption trenches
shall not be installed in cherty clays when the field evaluation indicated
the presence of zones of large voids. Regardless of the percolation
rate, absorption trenches installed in areas of potential ground water
contamination with cherty clays should be designed for a maximum loading
rate of forty-five hundredths (.45) gallons per square foot or a minimum
of two hundred sixty-five (265) square feet per bedroom.
|
|
***Fine loams with low to moderate shrink/swell potential and
less than thirty-five percent (35%) clay.
|
|
****Clays with low to moderate shrink/swell potential above
any perched water table or zone of seasonal saturation. These soils
are easily damage during construction due to compaction from equipment.
Absorption trenches should be installed only when the soil moisture
content is less than the plastic limit. Extreme care should be taken
to determine if a perched water table or zone of seasonal saturation
as evidenced by mottling is within two (2) feet of the trench bottom
of these soils. Soils with percolation rates slower than one hundred
twenty (120) minutes per inch shall not be used for soil absorption
of sewage tank effluent.
|
e.
Each absorption trench system shall have a minimum of three (3) trenches
with no one (1) trench longer than one hundred (100) feet. Trenches
longer than one hundred (100) feet may be used with approval of the
administrative authority when the total absorption system requires
more than five hundred (500) linear feet of trenches. The absorption
trenches shall be located not less than three (3) times the trench
width on centers with a minimum spacing of six (6) feet on centers.
f.
Absorption trenches shall be at least twenty-four (24) inches wide
and no more than thirty-six (36) inch wide. Thirty-six (36) inches
wide trenches should not be utilized in soils with percolation rates
slower than forty-five (45) minutes per inch. The bottom of standard
absorption trenches shall be at least eighteen (18) inches and no
more than thirty (30) inches below the finished grade except as approved
by the administrative authority.
g.
The pipe used between the sewage tank and the absorption system shall
be a minimum of four (4) inch inside diameter equivalent to the pipe
used for the building sewer as set forth herein. The pipe shall have
a minimum fall of not less than one-eighth (⅛) inch per foot.
All joints shall be of watertight construction.
h.
Gravity-fed absorption field distribution lines should be at least
four (4) inches in diameter. If long tiles are laid, they shall each
be separated by one-fourth (¼) inch space and the joint covered
by a strip of untreated building paper. If perforated distribution
lines are used, the perforation shall be at least one-half (½)
inch and no more than three-fourths (¾) inch in diameter and
spaced to provide at least the equivalent total opening of comparable
diameter long tile laid with one-fourth (¼) inch open joints.
(1)
Pipe used for distribution lines shall meet the appropriate
ASTM standard or those of an equivalent testing laboratory. Fittings
used in the absorption field shall be compatible with the materials
used in the distribution lines.
(2)
Single-wall corrugated polyethylene coiled tubing or thin wall
perforated S&D PVC piping shall not be allowed. Acceptable perforated
pipe shall have a minimum pipe stiffness of 40 PSI. When four (4)
or six (6) inch diameter double-wall corrugated plastic pipe is used
for distribution lines, it shall be certified as complying with applicable
ASTM standard. The corrugated pipe shall have three (3) rows of holes,
each hole between one-half (½) inch and three-fourth (¾)
inch in diameter and spaced longitudinally approximately four (4)
inches on centers. The rows of holes may be one hundred twenty degrees
(120°) on centers around the periphery or three (3) rows may be
located in the lower portion of the pipe, the outside rows being approximately
on one hundred twenty degree (120°) centers.
i.
The absorption trenches shall be constructed as level as possible
but in no case shall the fall in a single trench bottom exceed one-fourth
(¼) inch in ten (10) feet as determined by an engineer's level.
The ends of distribution lines should be capped or plugged or when
they are at equal elevations, they should be connected.
j.
Rock used in soil absorption systems shall be clean, washed gravel,
graded or sized between three-fourths (¾) inch to two and one-half
(2½) inches. No limestone shall be allowed. The rock shall
be placed a minimum of one (1) foot deep with at least six (6) inches
below the pipe and two (2) inches over the pie and distributed uniformly
across the trench bottom and over the pipe. Before placing soil backfill
over the trenches, the gravel shall be covered with:
(1)
Unbacked, rolled, three and one-half (3½) inch thick
fiberglass insulation;
(2)
Untreated building paper;
(3)
Synthetic drainage fabric;
(4)
A minimum of eight (8) inches of straw for a compacted thickness
of two (2) inches; or
(5)
Other material approved by the administrative authority laid
as to separate the gravel from the backfill.
k.
Complex slope patterns and slopes dissected by gullies shall not
be considered for installation of absorption trenches. Uniform slopes
under fifteen percent (15%) shall be considered suitable for installation
of absorption trenches. When slopes are less than two percent (2%),
provisions shall be made to insure adequate surface drainage. When
slopes are greater than four percent (4%), the absorption trenches
shall follow the contour of the ground. Uniform slopes between fifteen
percent (15%) and thirty percent (30%) should not be used for installation
of absorption trenches unless the soils are three (3) feet or more
below the trench bottom. Slopes within this range may require installation
of interceptor drains upslope from the soil absorption system to remove
all excess water that might be moving laterally through the soil during
the wet periods. Usable areas larger than minimum are ordinarily required
in this slope range. Slopes greater than thirty percent (30%) shall
not be utilized for installation of absorption trenches unless the
following requirements can be met and approval is obtained from the
administrative authority.
(1)
The slope can be terraced or otherwise graded or the absorption
trenches can be located in naturally occurring soil so as to maintain
a minimum ten (10) feet horizontal distance from the absorption trench
and the top edge of the fill embankment;
(2)
The soil is permeable and no restrictive layers or water tables
occur at a depth within two (2) feet of the trench bottom;
(3)
Surface water runoff is diverted around the absorption trench
field so that there will be no scouring or erosion of the soil over
the field;
(4)
If necessary, ground water flow from heavy rainfall is intercepted
and diverted to prevent that water from running into or saturating
the soil absorption system; and
(5)
There is sufficient ground area available to install the absorption
trench system with these modifications.
l.
Effluent distribution devices, including distribution boxes, flow
dividers and flow diversion devices, shall be of sound construction,
watertight, not subject to excessive corrosion and of adequate design
as approved by the administrative authority. Effluent distribution
devices shall be separated from the sewage tank and absorption trenches
by a minimum of two (2) feet of undisturbed or compacted soil and
shall be placed level on a solid foundation of soil or concrete to
prevent differential settlement of the device.
(1)
Each distribution line shall connect individually to the distribution
box.
(2)
The pipe connecting the distribution box to the distribution
line shall be of a tight joint construction laid on undisturbed earth
or properly bedded throughout its length.
(3)
No more than four (4) distribution lines should be connected
to a distribution box receiving gravity flow unless the ground surface
elevation of the lowest trench is below the flow line elevation of
the distribution box.
m.
Stepdowns or drop boxes may be used where topography prohibits the
placement of absorption trenches on level grade. Serial distribution
systems should be limited to where there is at least three (3) feet
separation between the bottom of the absorption trenches and the limiting
condition such as slow permeability or zone of seasonal saturation
as evidenced by bottling. Whenever the design sewage flow rate requires
more than seven hundred fifty (750) feet of distribution line in a
stepdown or drop box type system, the absorption field shall be divided
into two (2) or more equal portions. Stepdowns shall be constructed
of two (2) feet of undisturbed soil and constructed to a height level
with the top of the upper distribution line. The inlet to a trench
should be place either in the center or as far as practical from the
outlet (overflow) from the same trench. Drop boxes shall be constructed
so that the inlet supply pipe is one (1) inch above the invert of
the outlet supply pipe which is connected to the next lower drop box.
The top of the trench outlet laterals, which allow effluent to move
to the distribution lines, shall be two (2) inches below the invert
of the outlet supply line. It is recommended that the drop boxes be
designed to close off the trench outlets to provide for periods of
resting when the absorption trench becomes saturated.
n.
Dosing is recommended for all systems except serial distribution
systems and shall be provided when the design sewage flow requires
more than six hundred (600) lineal feet of distribution line. When
the design sewage flow requires more than one thousand (1,000) lineal
feet of distribution line, the absorption field shall be divided into
two (2) equal portion and each half dosed alternatively, not more
than four (4) time per day. Dosing may be accomplished by the use
of a pump. Each side of the system shall be dosed not more than four
(4) times per day. The volume of each dose shall be the greater of
the daily sewage volume divided by the daily dosing frequency or an
amount equal to approximately three-fourth (¾) of the internal
volume of the distribution lines being dosed (approximately one-half
(½) per gallon per lineal foot of four (4) inch pipe). Whenever
dosed distribution box systems are utilized, the separation distance
between the absorption trench bottom and limiting condition should
be at least two (2) feet.
o.
Gravelless subsurface absorption systems may be used as an alternative
to conventional four (4) inch pipe placed in gravel-filled trenches,
however; as they cannot be used in areas where conventional systems
would not be allowed due to poor permeability, height ground water
or insufficient depth to bedrock. Design approval for these systems
may be required from the administrative authority prior to installation
and all manufacturing specifications and installation procedures shall
be closely adhered to.
(1)
The eight (8) and ten (10) inch (inner diameter) corrugated
polyethylene tubing used in gravelless systems shall meet the requirements
of ASTM F 667, Stand Specification for Large Diameter Corrugated Polyethylene
Tubing. The eight (8) inch pipe may be considered equal to a two (2)
feet wide standard absorption trench. The ten (10) inch pipe may be
considered equal to a three (3) feet wide absorption trench.
(2)
Two (2) rows of perforations shall be provided located one hundred
twenty degrees (120°) apart along the bottom half of the tubing
each sixty degrees (60°) from the bottom centerline. Perforations
shall be bottom center. Perforations shall be cleanly cut and uniformly
spaced along the length of the tubing and should be staggered so that
there is only one (1) hole in each corrugation. The tubing shall be
visibly marked to indicate the top of the pipe. All gravelless drainfield
pipe shall be encased at the point of manufacture with a spun bonded
nylon filter wrap.
(3)
The trench for the gravelless system shall be dug with a level
bottom. On sloping ground, the trench should follow the contour of
the ground to maintain a level trench bottom and to ensure a minimum
backfill of six (6) inches. It is required that the minimum trench
width for the gravelless system be twenty-four (24) inches. In clay
soils it is required that the trench be backfilled with sandy material
or good topsoil. The gravelless system may be installed at a trench
bottom depth of eighteen (18) inches minimum to thirty (30) inches
maximum, but a more shallow trench bottom depth of eighteen (18) to
twenty-four (24) inches is recommended. To promote equal effluent
and suspended solids distribution, the slope of the drain pipe should
be from zero (0) to one-half (½) inch per one hundred (100)
feet.
p.
The administrative authority may permit the use of a bed system on
sites where the soil permeability is a percolation rate of forty-five
(45) minutes per inch or less and essentially meeting the other on
lots which are limited to topography, space or other site planning
considerations. In these cases the number of square feet of bottom
area needed shall be increased by fifty percent (50%) over what would
be required for a trench system. Distribution lines shall be at least
eighteen (18) inches from the side of the bed and shall have line
on three (3) feet centers. When the design volume of sewage exceeds
six hundred (600) gallons per day, adequate space shall be provided
to accommodate a trench system for the absorption field.
2.
Possible modifications to standard absorption systems which may be
utilized to overcome selected soil and site limitations must be approved
by the administrative authority including the following:
a.
Shallow placement of absorption trenches shall be utilized where
insufficient depth to seasonally high or perched water table or where
insufficient soil thickness prevents the placement of conventional
distribution lines in accordance with this Section. Shallow trenches
shall be designed and constructed to provide a minimum of two (2)
feet of natural soil separation between the trench bottom and the
uppermost elevation of the seasonally high or perched water table
and rock. In areas of thin soils and potential for ground water contamination,
the vertical separation between the trench bottom and bedrock shall
be four (4) feet or more. Shallow trenches may be constructed by placing
the top of the gravel at or near original ground level and covering
the absorption field with loamy soil or good topsoil to a depth of
twelve (12) to eighteen (18) inches at the center. The cover over
the absorption field shall extend at least five (5) feet beyond the
edge of any trench and have a turf grass cover established immediately
after construction. If an area is to be filled and the trenches constructed
in the fill with the bottom of the trenches in at least six (6) inches
of natural soil, the following procedures must be followed:
(1)
The fill material should be of a sandy texture with a maximum
clay content of fifteen percent (15%). The fill material should not
be hauled or worked wet. The area to be filled must be protected from
traffic and small brush and trees removed prior to placement;
(2)
The soil surface must be loosened with a cultivator or garden
plow. This work must be done when the soil is dry;
(3)
The fill is moved onto the site without driving on the loosened
soil. The fill material is then tilled into the natural soil to crease
a gradual boundary between the two (2). The remaining fill is then
added in layers until the desired height is obtained with each layer
being tilled into the preceding layer; and
(4)
The site is then shaped to shed water and fill all low spots
before the absorption system is installed. After installation of the
absorption system, the site must have a turf grass cover established
as soon as possible.
b.
Alternating dual field absorption systems may be utilized where soils
are limited by high clogging potentials, percolation rates slower
than sixty (60) minutes per inch or height shrink/swell potential
soils and where the potential for malfunction and need for immediate
repair is required. Alternating dual field absorption systems shall
be designed with two (2) complete absorption fields, each sized a
minimum of seventy-five percent (75%) of the total area required for
a single field and separated by an effluent flow diversion valve.
The diversion valve shall be constructed to resist five hundred (500)
pounds crushing strength, structurally sound and shall be resistant
to corrosion. Valves placed below ground level shall be that it may
be operated from the ground surface.
c.
Sand-lined trenches may be used in areas where the soil has greater
than fifty percent (50%) rock fragments and there is a potential for
ground water contamination due to bedrock conditions. For a maximum
loading rate of forty-five hundreds (.45) gallons per day per square
foot or a minimum of two hundred sixty-five (265) square feet per
bedroom the sand is not required to meet the requirements for intermittent
sand filters. The material must be natural or manufactured sand and
have no more than fifteen percent (15%) clay content. Manufactured
sand shall be chat sand produced from flint chat in the Joplin area
or fines manufactured from igneous rocks or chert gravel may be used.
The sand used for the liner shall contain less than twenty-five percent
(25%) material retained on a No.10 sieve. Finely crushed limestone
is not acceptable. For higher loading rates, the sand must meet the
requirements for an intermittent sand filter.
(1)
In standard four (4) inch pipe and gravel trenches, the depth
of liner material must be twelve (12) inches below the gravel and
at least six (6) inches on the sides of the gravel up to the top of
the gravel. To place sand on the sides of the trenches, the trench
walls must be excavated on a slope instead of vertically. The side
slopes should be two to one (2:1) and in no case steeper than one
to one (1:1).
(2)
In gravelless pipe systems the minimum thickness of liner material
is six (6) inches around the pipe.
(3)
The effluent to sand-lined systems in areas of potential ground
water contamination should be equally distributed as much as practically
possible. Serial and drop box systems shall not be used. As a minimum,
a distribution box shall be used to evenly distribute the effluent
to the trenches. Dosing is recommended in order to more positively
assure even distribution.
(4)
The sand-lined trenches may be used with the approval of the
administrative authority where the percentage of rock fragments is
less than seventy percent (70%) for at least four (4) feet below the
trench bottom. For sand-lined trenches to function properly, the permeability
of the natural material should be similar to the permeability of the
liner material. Sand-lined trenches must not be used over fragipans
of other restrictive layers which have perched water tables and could
cause saturation of the liner material.
H.
Alternative Systems.
1.
General. The intent of this Section is to provide
minimum standards for the design, location, installation, use and
maintenance of alternative sewage treatment systems in areas of limiting
soil characteristics or where a standard system cannot be installed
or is not the most suitable treatment. Where systems are employed,
they shall comply with all local codes and ordinances and should be
subject to timely inspections to assure adherence to specifications.
2.
Adoption and use. Where this rule is administered
by an administrative authority, those administrative authorities may
adopt this Section in whole or in part as part of a local code or
ordinance. Further, nothing in this rule or Section shall require
any administrative authority to allow the installation of any system
in this Section.
3.
Low pressure pipe (LPP) system. A low pressure,
two (2) to four (4) feet pressure head, pipe system may be utilized
where soil and site conditions prohibit the installation of a conventional
or modified septic tank system due to the presence of shallow soil
conditions, seasonally high water table conditions and slow soil permeability.
The administrative authority may permit the use of a LPP system where
there are cherty clay soils overlying highly permeable bedrock. The
separation distance in these areas of concern for ground water between
the trench bottoms and bedrock shall be at least four (4) feet or
more. The City shall require that the hydraulic design of LPP systems
be designed by an engineer. The City may also require the LPP trenches
to be sand lined if the soils have severely diminished treatment capability
due to excessive rock content. The amount of rock fragments should
be less than fifty percent (50%) and in no case more than seventy
percent (70%) unless the trenches are lined with sand.
a.
The LPP shall consist of the following basic components:
(1)
A network of small diameter one (1) to two (2) inch diameter
perforated PVC one hundred sixty (160) pounds per square inch pipe
or equivalent placed in natural soil at shallow depths, generally
six (6) to twelve (12) inches, in narrow trenches not less than six
(6) inches in width. The holes in the perforated pipe should be spaced
from two (2) feet to no more than eight (8) feet. The minimum hole
size is five thirty-seconds (5/32) inch;
(2)
A properly designed, two (2) compartment septic tank or other
approved pretreatment system and a pumping or dosing tank. The pumping
or dosing tank should be a minimum of five hundred (500) gallons or
have the capacity to store one (1) day's flow above the pump on level,
whichever is greater;
(3)
An approved submersible effluent pump with appropriate on/off
controls for controlled dosing and a high water alarm or other approved
pressure dosing and distribution system; and
(4)
A watertight supply manifold pipe for conveying effluent from
the pump to the low pressure network.
b.
The soil and site criteria for low pressure pipe systems shall meet
the following minimum requirements:
(1)
LPP absorption fields should not be installed on slopes in excess
of ten percent (10%). LPP absorption fields may be installed on slopes
greater than ten percent (10%) but require special design procedures
to assure proper distribution of effluent over the absorption field;
(2)
There shall be at least twenty-four (24) inches of separation
between the naturally occurring soil surface and rock, water-impeding
formation, seasonally high water table or evidence of chrome two (2)
mottles. This twenty-four (24) inch depth shall consist of permeable
soils with percolation rates less than or equal to sixty (60) minutes
per inch and greater than or equal to fifteen (15) MPI. The bottom
of percolation test holes must be dug or bored to the bottom of the
proposed trenches. The bottom of the proposed trenches must be located
a minimum of two (2) feet above rock, water- impeding formation, seasonally
high water table or where there is evidence of chrome two (2) mottles.
In areas where there is a concern for ground water contamination and
the soils have a high chert content, the bottom of the proposed trenches
may be required to be as much as four (4) feet above bedrock;
(3)
Components of the LPP shall not be located in depressions or
areas subject to frequent flooding. Surface water, perched ground
water and other subsurface lateral water movement shall be intercepted
or diverted away from all components of the LPP. Final shape of the
LPP distribution field shall be such that rainwater or runoff is shed;
(4)
Location of the septic tank, pumping or dosing chamber and LPP
absorption field is subject to the same horizontal setbacks specified
herein. Horizontal distances from the LPP absorption field shall be
measured from a margin of two and one-half (2½) feet beyond
the lateral and manifold pipes;
(5)
An area that is at least equal in size to the LPP distribution
field area plus a two and one-half (2½) margin beyond the lateral
and manifold pipes and meeting all other site and soil criteria shall
be set aside for a replacement field;
(6)
There shall be no soil disturbance to an approved site for an
LPP system except the minimum required for installation; and
(7)
Additional design considerations that should be followed may
be found in the publication Design and Installation of Low-Pressure
Pipe Waste Treatment Systems, May 1982, written by Craig Cogger, Bobby
L. Carlile and Dennis Osborne, North Carolina State University. Copies
of this publication may be obtained from the Triangle J Council of
Governments, 100 Park Drive, Research Triangle Park, North Carolina
27709. Also the publication Pressurized Distribution for On-Site Domestic
Wastewater-Renovation Systems, April 1984, Bulletin 870, Agricultural
Experiment Station, University of Arkansas, Fayetteville, Arkansas,
may be obtained.
c.
The following application rates shall be used in determining the
maximum application rate for low pressure pipe systems:
|
Table III
| |||
|---|---|---|---|
|
Percolation Rate
|
Absorption Area Square Feet/Bedroom*
|
Loading Rate Gallon/Square Feet*
|
Probable Soil Texture
|
|
1 — 10
|
200
|
0.6
|
Sand Loamy Sand
|
|
11 — 30
|
300
|
0.4
|
Sandy Loam, Loam
|
|
3 — 45
|
400
|
0.3
|
Loam, Silt Loam, Clay Loam
|
|
46 — 60
|
600
|
0.2
|
Silt Loam, Clay Loam, Silty Clay Loam, Cherty Clays**
|
|
*Gallons of sewage tank effluent per day per square foot of
total area.
| |||
|
**In areas where there is a concern for ground water contamination
and the soils consist of cherry clays, the loading rate of two-tenths
(.2) gallons per day per square foot should be used even when the
percolation rate would indicate a higher loading.
|
d.
In calculating the number of square feet for the absorption field
(not square footage of trench bottom), the design sewage flow shall
be divided by the application rate from Table III. The lateral lines
shall have a minimum spacing of five (5) feet on centers within the
area calculated for the absorption field. The systems shall be designed
so that the discharge from any one (1) lateral line does not vary
more than ten percent (10%) from the other laterals. All laterals
shall have an envelope of trench rock surrounding the pipe. The trench
rock shall be placed to a minimum depth of four (4) inches below the
pipe and two (2) inches above the pipe.
e.
Design of the LPP shall comply with accepted practices and be specifically
approved by the administrative authority.
4.
Elevated sand mounds. Elevated sand mounds may be
considered whenever site conditions preclude the use of absorption
trenches. The construction of a mound shall be initiated only after
a site evaluation has been made and landscaping, dwelling placement,
effect on surface drainage and general topography have been considered.
Due to the nature of this alternative system, actual selection of
mound location, size of mound and construction techniques must be
carefully considered and the criteria established in this standard
implicitly followed. The City requires that mound systems be designed
by an engineer and be specifically approved before construction begins.
A setback distance of fifty (50) feet from the downslope property
line is recommended. Additional design information that should be
followed can be found in the publication Recommended Standards for
Individual Sewage Systems, 1980 edition, Great Lakes-Upper Mississippi
River Board of State Sanitary Engineers. Additional information also
can be found in the United State Environmental Protection Agency publication
Design Manual — On-site Wastewater Treatment and Disposal Systems,
October 1980, EPA 625/1 80-012.
a.
Elevated sand mounds shall not be utilized on soils where the high
ground water level as evidenced by mottling, bedrock or other strata
having a percolation rate slower than one hundred twenty (120) minutes
per inch occurs within twenty-four (24) inches of natural grade. Two
(2) feet of soil depth over bedrock shall be required. Mounds shall
be constructed only upon undisturbed naturally occurring soils.
b.
Elevated sand mounds are subject to the setback distances required
herein.
c.
The fill material from the natural soil plowed surface to the top
of the rock-filled bed shall have a sand texture as classified by
the Soil Conservation Service, U.S. Department of Agriculture. Loading
rates on the sand fill shall not exceed the values in Table IV:
|
Table IV
| ||
|---|---|---|
|
Recommended Loading Rates for Soil Textures Suited to
Use as Fill In a Mound System
| ||
|
Texture
|
Loading Rate
| |
|
Medium to Coarse Sand
|
1.2 Gallon/Square Foot/Day
| |
|
Find Sand
|
1.0 Gallon/Square Foot/Day
| |
|
Loamy Sand
|
0.8 Gallon/Square Foot/Day
| |
|
Sandy Loam
|
0.6 Gallon/Square Foot/Day
| |
|
Note: Rock fragments larger than one-sixteenth (1/16) inch shall
not exceed fifteen percent (15%) by volume of the material used for
sandy fill.
| ||
d.
There shall be a minimum of one (1) foot of fill material and two
(2) feet of naturally occurring soils between the bottom of the trench
rock and the highest elevation of the limiting conditions as defined
herein.
e.
Whenever possible, mounds should be located on flat areas or crests
of slopes. Mounds should not be located on natural slopes of more
than six percent (6%) if the percolation rate is slower than sixty
(60) minutes per inch to a depth of at least twenty-four (24) inches
below the sand layer. Mounds may be located on slopes up to a maximum
of twelve percent (12%) if the soil percolation rate is faster than
sixty (60) minutes per inch to a depth of twenty-four (24) inches
below the sand layer.
f.
In no case shall the width of the trench rock in a single bed exceed
ten (10) feet.
g.
The required bottom area of the trenches or bed and the effective
basal area of the mound shall be based on one hundred twenty (120)
gallons per bedroom per day. The basal area of the mound shall have
the minimum area as shown in Table V.
|
Table V
| ||
|---|---|---|
|
Percolation Rate Minutes/Inch
|
Loading Rate Basal Area Gallon/Day/Square Foot
| |
|
1 — 30
|
1.20
| |
|
31 — 45
|
0.75
| |
|
46 — 60
|
0.50
| |
|
61 — 120
|
0.25
| |
h.
The area of sand fill shall extend beyond the basal area and the
sides shaped to a three to one (3:1) or four to one (4:1) slope. The
sand fill shall be covered with six (6) inches of fine textured soil
and a final cap of six (6) inches of good topsoil applied. Also the
mound shall be seeded with a hardy grass to establish a turf grass
cover as soon as possible. No shrubs shall be planted on the top of
the mound. Shrubs may be placed at the foot and side slopes of the
mound.
i.
The land area fifty (50) feet down slope of the elevated sand mound
is the effluent dispersal area and the soil in this area may not be
removed or disturbed.
j.
Dosing shall be required for all elevated sand mounds. The mound
shall be dosed not more than two (2) times per day. The size of the
dosing pump shall be selected to maintain a minimum pressure of one
(1) pound per square inch, two and three-tenths (2.3) feet of head,
at the end of each distribution line.
(1)
Perforation holes and hole spacing shall be determined to insure
equal distribution of the effluent throughout the bed or trenches.
(2)
The perforated pipe laterals shall be connected to a two (2)
inch diameter manifold pipe with the ends capped. The laterals shall
be spaced no farther than forty (40) inches on center and no farther
than twenty (20) inches from the edge of the trench rock. The perforated
pipe laterals shall be installed level with the perforations downward.
There shall be a minimum of nine (9) inches of trench rock below the
laterals and two (2) inches above the laterals. The material used
to cover the trench rock shall be untreated building paper, six (6)
inches of compacted straw, three and one-half (3½) inch unbacked
fiberglass insulation or a geotextile.
(3)
The manifold pipe shall be connected to the supply pipe from
the pump. The manifold shall be sloped toward the supply pipe from
the pump. Antibackflow valves are prohibited in the pump discharge
line. The pump discharge line shall be graded to permit gravity flow
to the absorption area or back to the dosing tank.
k.
Prior to preparing the area selected for the mound, above ground
vegetation must be closely cut and removed from the ground surface.
Prior to plowing, the dosing pump discharge line from the pump chamber
to the point of connection with the distribution manifold shall be
installed. The area shall then be plowed to a depth of seven (7) to
eight (8) inches parallel to the land contour with the plow throwing
the soil upslope to provide a proper interface between the fill and
natural plowing but in no case shall a rubber-tired tractor be used
after the surface preparation is completed. Tree stumps should be
cut flush with the surface and the roots should not be pulled. The
soil shall be plowed only when the moisture content of a fragment
eight (8) inches below the surface is below the plastic limit.
l.
Mound construction shall proceed immediately after surface preparation
is completed.
(1)
A minimum of twelve (12) inches of sand fill shall be placed
where the trench rock is to be located. A crawler tractor with a blade
shall be used to move the sand into place. At least six (6) inches
of sand shall be kept beneath equipment to minimize compaction of
the plowed layer. The sand layer upon which the trench rock is to
be placed shall be level.
(2)
After hand leveling of the trench rock, place the distribution
system and cover the pipes with two (2) inches of rock. After installation
of the distribution system, the entire mound is to be covered with
topsoil native to the area. Crown the entire mound by providing twelve
(12) inches of topsoil on the side slopes with a minimum of eighteen
(18) inches over the center of the mound. The entire mound shall then
have a turf grass cover established to assure stability of the installation.
(3)
The area surrounding the elevated sand mound shall be graded
to proved diversion of surface runoff waters.
5.
Holding tanks. The use of holding tanks is generally
discouraged and their interim use shall be limited to situations where
construction of satisfactory sewage treatment and disposal systems
will occur within six (6) months. Use of a holding tank must be specifically
approved by the administrative authority.
a.
A holding tank shall be constructed of the materials and by the same
procedures as those specified for watertight septic tanks.
b.
A cleanout pipe of at least six (6) inches diameter shall extend
to the ground surface and be provided with seals to prevent odor and
exclude insects and vermin. A manhole of at least twenty (20) inches
least dimension shall extend through the cover to a point within twelve
(12) inches but no closer than six (6) inches below finished grade.
The manhole cover shall be covered with at least six (6) inches of
earth.
c.
The tank shall be protected against flotation under high water table
conditions. This shall be achieved by weight of the tank, earth anchors
or shallow bury depths.
d.
For a residence, the size shall be one thousand (1,000) gallons or
four hundred (400) gallons time the number of bedrooms, whichever
is greater.
f.
A contract for disposal and treatment of the sewage wastes shall
be maintained by the owner with a pumper, municipality, agency or
firm established for that purpose.
g.
Holding tanks shall be monitored to minimize the chance of accidental
sewage overflows. Techniques such as visual observation, warning lights
or bells or regularly scheduled pumping shall be used. For other establishments
a positive warning system shall be installed which allows twenty-five
percent (25%) reserve capacity after actuation.
h.
Holding tanks used in conjunction with permanent black water/gray
water systems must conform to the requirements of this Section except
that the minimum size tank is one thousand (1,000) gallons. In these
situations the holding tank is to receive toilet wastes only.
6.
Sand filters. Septic tanks or aeration units and
sand filters may be used along with soil absorption systems in soils
with percolation rates between sixty (60) and one hundred twenty (120)
minutes per inch. The City shall require that these systems be designed
by an engineer. These systems must be specifically approved by the
administrative authority.
a.
The septic tanks and aeration units must be in accordance with Subsection (F)(2) of this Code. Setback distances as shown in Table I and as specified herein shall apply except that the minimum distance to the downslope property line should be fifty (50) feet.
b.
Sand filters must be designed and constructed in accordance with
10 CSR 20-8.020(13)(C).
c.
Use of these facilities with mechanical equipment and sand filters
should be limited to where continued maintenance can be performed
by an entity such as a sewer district, municipality or private firm
established for that purpose. A contract for continued maintenance
should be maintained by the owner at all times.
d.
The size of the soil absorption system following the sand filter
shall be based on the required treatment area for a soil having a
percolation rate of sixty (60) minutes per inch as specified in Table
II herein. The soil shall meet all applicable criteria as specified
herein.
7.
Other systems. Where unusual conditions exist, special
systems of treatment and disposal, other than those specifically mentioned
in this case, may be employed, provided:
a.
Reasonable assurance of performance of the system is presented to
the administrative authority;
b.
The engineering design of the system is first approved by the administrative
authority;
c.
There is no discharge to the ground surface or surface waters;
d.
Adequate substantiating data to indicate that the effluent will not
contaminate any drinking water supply, ground water used for drinking
water or any surface water;
e.
Treatment and disposal of the wastes protects public health and general
welfare; and
f.
These systems comply with all applicable requirements of these standards
and with all local codes and ordinances and all applicable requirements
of Chapter 702 of the Missouri Statutes.
[CC 1979 §68.140; Ord. No. 1487 Art. V, 5-16-1985; Ord.
No. 2782 §1 (68.140(6)), 5-7-2002]
A.
No
person shall discharge or cause to be discharged any stormwater, surface
water, ground water, roof runoff, subsurface drainage, including interior
and exterior foundation drains, uncontaminated cooling water or unpolluted
industrial process waters to any sanitary sewer.
B.
Stormwater
and all other unpolluted drainage shall be discharged to such sewers
as are specifically designated as combined sewers or storm sewers
or to a natural outlet approved by the Superintendent. Industrial
cooling water or unpolluted process waters may be discharged, on approval
of the Superintendent, to a storm sewer, combined sewer or natural
outlet.
C.
No
person shall discharge or cause to be discharged any of the following
described waters or wastes to any public sewers:
1.
Any gasoline, benzine, naphtha fuel oil or other flammable or explosive
liquid, solid or gas.
2.
Any waters or wastes containing toxic or poisonous solids, liquids
or gases in sufficient quantity, either singly or by interaction with
other wastes, to injure or interfere with any sewage treatment process,
constitute a hazard to humans or animals, create a public nuisance
or create any hazard in the receiving waters of the sewage treatment
plant, including, but not limited to, cyanide in excess of two (2)
mg/l as CN in the wastes as discharged to the public sewer.
3.
Any waters or wastes having a pH lower than 5.5 or having any other
corrosive property capable of causing damage or hazard to structures,
equipment and personnel of the sewage works.
4.
Solid or viscous substances in quantities or of such size capable
of causing obstruction to the flow in sewers or other interference
with the proper operation of the sewage works such as, but not limited
to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags,
feathers, tar, plastics, wood, unground garbage, whole blood, paunch
manure, hair and fleshings, entrails and paper dishes, cups, milk
containers, etc., either whole or ground by garbage grinders.
D.
No
person shall discharge or cause to be discharged the following described
substances, materials, waters or wastes if it appears likely in the
opinion of the Superintendent that such wastes can harm either the
sewers, sewage treatment processor equipment, have an adverse affect
on the receiving stream or can otherwise endanger life, limb, public
property or constitute a nuisance. In forming his/her opinion as to
the acceptability of these wastes, the Superintendent will give consideration
to such factors as the quantities of subject wastes in relation to
lows and velocities in the sewers, materials of construction of the
sewers, nature of the sewage treatment process, capacity of the sewage
treatment plant, degree of treatability of wastes in the sewage treatment
plant and other pertinent factors. The substances prohibited are:
1.
Any liquid or vapor having a temperature higher than one hundred
fifty degrees Fahrenheit (150°F) sixty-five degrees Centigrade
(65°C).
2.
Any water or wastes containing fats, wax, grease or oils, whether
emulsified or not, in excess of one hundred (100) mg/l or containing
substances which may solidify or become viscous at temperatures between
thirty-two degrees Fahrenheit and one hundred fifty degrees Fahrenheit
(zero (0) and sixty-five degrees Centigrade (65°C)).
3.
Any garbage that has not been properly shredded. The installation
and operation of any garbage grinder equipped with a motor of three-fourths
(¾) horsepower (0.76 hp metric) or greater shall be subject
to the review and approval of the Superintendent.
4.
Any waters or wastes containing strong acid iron pickling wastes
or concentrated plating solutions whether neutralized or not.
5.
Any waters or wastes containing iron, chromium, copper, zinc and
similar objectionable or toxic substances; or wastes exerting an excessive
chlorine requirement to such degree that any such material received
in the composite sewage at the sewage treatment works exceeds the
limits established by the Superintendent for such materials.
6.
Any waters or wastes containing phenols or other taste- or odor-producing
substances in such concentrations exceeding limits which may be established
by the Superintendent as necessary after treatment of the composite
sewage to meet the requirements of State, Federal or other public
agencies of jurisdiction for such discharge to the receiving waters.
7.
Any radioactive wastes or isotopes of such half-life or concentration
as may exceed limits established by the Superintendent in compliance
with applicable State or Federal regulations.
8.
Any waters or wastes having a pH in excess of 9.5.
9.
Materials which exert or cause:
a.
Unusual concentration of inert suspended solids (such as, but not
limited to, fuller's earth, lime slurries and lime residues) or of
dissolved solids (such as, but not limited to, sodium chloride or
sodium sulfate).
b.
Excessive discoloration (such as, but not limited to, dye wastes
and vegetable tanning solutions).
c.
Unusual BOD, chemical oxygen demand, or chlorine requirements in
such quantities as to constitute a significant load on the sewage
treatment works.
d.
Unusual volume of flow or concentration of wastes constituting "slugs"
as defined herein.
10.
Waters or wastes containing substances which are not amendable to
treatment or reduction by the sewage treatment processes employed
or are amendable to treatment only to such degree that the sewage
treatment plant effluent cannot meet the requirements of other agencies
having jurisdiction over discharge to the receiving waters.
11.
Any waters or wastes having:
a.
A five (5) day BOD greater than three hundred (300) parts per million
by weight; or
b.
Containing more than three hundred fifty (350) parts per million
by weight of suspended solids; or
c.
Having an average daily flow greater than two percent (2%) of the
average sewage flow of the City shall be subject to the review of
the Superintendent.
Where necessary in the opinion of the Superintendent, the owner
shall provide, at his/her expense, such preliminary treatment as may
be necessary to:
(1)
Reduce the biochemical oxygen demand to three hundred (300)
parts per million by weight; or
(2)
Reduce the suspended solids to three hundred fifty (350) parts
per million by weight; or
(3)
Control the quantities and rates of discharge of such waters
or wastes.
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Plans, specifications and any other pertinent information relating
to proposed preliminary treatment facilities shall be submitted for
the approval of the Superintendent and no construction of such facilities
shall be commenced until said approvals are obtained in writing.
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E.
If any waters are discharged or are proposed to be discharged to the public sewers, which waters contain the substances or possess the characteristics enumerated in Subsection (D) of this Section and which, in the judgment of the Superintendent, may have a deleterious effect upon the sewage works, processes, equipment or receiving wastes, or which otherwise creates hazard to life to constitute a public nuisance, the Superintendent may:
1.
Reject the wastes;
2.
Require pretreatment to an acceptable condition for discharge to
the public sewers;
3.
Require control over the quantities and rates of discharge; and/or
4.
Require payment to cover the added cost of handling and treating the wastes not covered by existing taxes or sewer charges under the provisions of Subsection (J) of this Section.
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If the Superintendent permits the pretreatment or equalization
of waste flows, the design and installation of the plants and equipment
shall be subject to the review and approval of the Superintendent
and subject to the requirements of all applicable codes, ordinances
and laws.
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F.
Grease,
oil and sand interceptors shall be provided when, in the opinion of
the Superintendent, they are necessary for the proper handling of
liquid wastes containing grease in excessive amounts or any flammable
wastes, sand or other harmful ingredients; except that such interceptors
shall not be required for private living quarters or dwelling units.
All interceptors shall be of a type and capacity approved by the Superintendent
and shall be located as to be readily and easily accessible for cleaning
and inspection.
1.
Every grease, oil and sand interceptor required will be cleaned as
needed but not less than two (2) times a year. The owner of the facility
required to have grease, oil and sand interceptors will show proof
of the cleaning by filling out the inspection form furnished by the
City. A copy of the completed inspection form will be given to the
Building Commissioner.
2.
Violators of Section 705.120(F)(1) will not be issued a business license until the violation is corrected.
G.
Where
preliminary treatment or flow equalizing facilities are provided for
any waters or wastes, they shall be maintained continuously in satisfactory
and effective operation by the owner at his/her expense.
H.
When
required by the Superintendent, the owner of any property serviced
by a building sewer carrying industrial wastes shall install a suitable
control manhole together with such necessary meters and other appurtenances
in the building sewer to facilitate observation, sampling and measurement
of the wastes. Such manhole, when required, shall be accessibly and
safely located and shall be constructed on accordance with plans approved
by the Superintendent. The manhole shall be installed by the owner
at his/her expense and shall be maintained by him/her so as to be
safe and accessible at all times.
I.
All
measurements, tests and analyses of the characteristics of waters
and wastes to which reference is made in the ordinance shall be determined
in accordance with the latest edition of "Standard Methods for the
Examination of Water and Wastewater", published by the American Public
Health Association and shall be determined at the control manholes
provided or upon suitable samples taken at said control manhole. In
the event that no special manhole has been required, the control manhole
shall be considered to be the nearest downstream manhole in the public
sewer to the point at which the building sewer is connected. Sampling
shall be set out by customarily accepted methods to reflect the effect
of constituents upon the sewage works and to determine the existence
of hazards to life, limb and property. (The particular analysis involved
will determine whether a twenty-four (24) hour composite at all outfalls
of a premise is appropriate or whether a grab sample or samples should
be taken. Normally, but not always, BOD and suspended solids analyses
are obtained from twenty-four (24) hour composites of all outfalls
whereas pHs are determined from periodic grab samples.)
J.
No
statement contained in this Section shall be construed as preventing
any special agreement or arrangement between the City and any industrial
concern whereby an industrial waste of unusual strength or character
may be accepted by the City for treatment, subject to payment therefore
by the industrial concern.
[CC 1979 §68.150; Ord. No. 1487 Art. VI, 5-16-1985]
No unauthorized person shall maliciously, willfully or negligently
break, damage, destroy, uncover, deface or tamper with any structure,
appurtenance or equipment which is part of the sewage works. Any person
violating this provision shall be subject to immediate arrest under
charge of disorderly conduct.
[CC 1979 §68.160; Ord. No. 1487 Art. VII, 5-16-1985]
A.
The
Superintendent and other duly authorized employees of the City bearing
proper credentials and identification shall be permitted to enter
all properties for the purposes of inspection, observation, measurement,
sampling and testing in accordance with the provisions of this Article.
The Superintendent or his/her representatives shall have no authority
to inquire into any processes including metallurgical, chemical, oil,
refining, ceramic, paper or other industries beyond that point having
a direct bearing on the kind and source of discharge to the sewers
or waterways or facilities for waste treatment.
B.
While performing the necessary work on private properties referred to in Section 705.140, Subsection (A) above, the Superintendent or duly authorized employees of the City shall observe all safety rules applicable to the premises established by the company and the company shall be held harmless for injury or death to the City employees and the City shall indemnify the company against loss or damage to its property by City employees and against liability claims and demands for personal injury or property damage asserted against the company and growing out of the gauging and sampling operation, except as such may be caused by negligence or failure of the company to maintain safe conditions as required in Section 705.120(H).
C.
The
Superintendent and other duly authorized employees of the City bearing
proper credentials and identification shall be permitted to enter
all private properties through which the City holds a duly negotiated
easement for the purposes of, but not limited to, inspection, observation,
measurement, sampling, repair and maintenance of any portion of the
sewage works lying within said easement. All entry and subsequent
work, if any, on said easement shall be done in full accordance with
the terms of the duly negotiated easement pertaining to the private
property involved.
[CC 1979 §68.170; Ord. No. 1487 Art. VIII, 5-16-1985]
A.
Any person found to be violating any provision of this Article except Section 705.130 shall be served by the City with written notice stating the nature of the violation and providing a reasonable time limit for the satisfactory correction thereof. The offender shall, within the period of time stated in such notice, permanently cease all violations.
B.
Any person who shall continue any violation beyond the time limit provided for in Subsection (A) above shall be guilty of a misdemeanor and on conviction thereof shall be fined in the amount not exceeding one hundred dollars ($100.00) for each violation. Each twenty four (24) hour period in which any such violation shall continue shall be deemed a separate offense.
C.
Any
person violating any of the provisions of this Article shall become
liable to the City for any expense, loss or damage occasioned the
City by reason of such violation.
[CC 1979 §68.180; Ord. No. 1487 Art. IX, 5-16-1985]
