(CHAPTER 1 SCOPE AND ADMINISTRATION)
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(SECTION 101 SCOPE AND GENERAL REQUIREMENTS)
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101.1 Title. These regulations shall be known as
the Private Sewage Disposal Code of St. Charles County, Missouri,
hereinafter referred to as "this code."
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101.2 Scope. Septic tank and effluent absorption
systems or other treatment tank and effluent disposal systems shall
be permitted where a public sewer is not available to the property
served. A public sewer shall be considered available when the nearest
property line is located within two hundred (200) feet of a public
sewer. Unless specifically approved, the private sewage disposal system
of each building shall be entirely separate from and independent of
any other building. The use of a common system or a system on a parcel
other than the parcel where the structure is located shall be subject
to the full requirements of this code as for systems serving public
buildings.
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101.3 Public sewer connection. Where public sewers
become available to the premises served, only the repair of an existing
system will be permitted. If a new system is required to be installed,
the use of the private sewage disposal system shall be discontinued.
The building sewer shall be disconnected from the private sewage disposal
system and connected to the public sewer.
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(SECTION 103 CODE COMPLIANCE AGENCY)
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103.1 Creation of enforcement agency. The Division
of Building and Code Enforcement within the Department of Community
Development is hereby created and the official in charge thereof shall
be known as the Code Official. The function of the agency shall be
the implementation, administration and enforcement of the provisions
of this code.
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103.2 Appointment. The Code Official shall be appointed
as provided by ordinance.
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(SECTION 106 PERMITS)
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106.2.4 Soil data. Soil test reports shall be submitted
indicating soil boring data related to the undisturbed and finished
grade elevations, vertical elevation reference point and horizontal
reference point. Surface elevations shall be given for all soil borings.
Soil reports shall bear the signature of a soil tester.
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106.3.3.1 Reinstatement. A permit that has expired
may be reinstated where approved by the Building Official. The request
for reinstatement shall be in writing and justifiable caused demonstrated.
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106.4.2 Fee schedule. The fees for private sewage
disposal work shall be as set forth by the Ordinances of St. Charles
County, Missouri.
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106.4.3 Fee refunds. The Code Official is authorized
to establish a refund policy.
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Delete remainder of Section.
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(SECTION 107 CONSTRUCTION DOCUMENTS)
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107.1 General. Submittal documents consisting of
construction documents, statement of special inspections, geotechnical
report and other data shall be submitted as required by the Building
Official, with sufficient clarity and detail dimensions showing the
nature and character of the work to be performed each permit application.
Specifications shall include pumps and controls, dose volume, elevation
differences (vertical lift), pipe friction loss, pump performance
curve, pump model and pump manufacturer. The construction documents
shall be prepared by a registered design professional where required
by the statutes of the jurisdiction in which the project is to be
constructed. Where special conditions exist, the Building Official
is authorized to require additional construction documents to be prepared
by a registered design professional. Where the quality of the materials
is essential for conformity to this code, specific information shall
be given to establish such quality, and this code shall not be cited,
or the term "legal" or its equivalent use as a substitute for specific
information.
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Exception: The Code Official is authorized
to waive the submission of construction documents and other data not
required to be prepared by a registered design professional if it
is found that the nature of the work applied for is such that review
of construction documents is not necessary to obtain compliance with
this code.
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107.1.2 Electronic submission. Where
design documents, including, but not limited to, plot plans, site
plans, design drawings, specifications, etc. are originally created
electronically, the Building Official is authorized to require electronic
submittal of documents in a portable document format (PDF) or similar
format for review. Where design documents were originally prepared
on paper and are submitted in a paper form, the Code Official is authorized
to charge a fee for converting those drawings to PDF equal to the
cost incurred by County staff recreating the document and not to exceed
more than one dollar ($1.00) per page.
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Exception: Where submittal documents
were originally prepared by hand and are eleven (11) inches by seventeen
(17) inches or less, the fee for document conversion shall not be
charged.
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(SECTION 112 MEANS OF APPEALS)
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112.1 General. For the purposes of this code, all appeals shall be in accordance with the procedure established for the Building Code of St. Charles County, Missouri, in Section 113 of Section 500.100.
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112.2 Limitations on authority. Delete in its entirety.
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112.3 Qualifications. Delete in its entirety.
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112.4 Administration. Delete in its entirety.
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(SECTION 113 BOARD OF APPEALS)
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(SECTION 114 VIOLATIONS)
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114.4 Violation penalties. Any person who shall
violate a provision of this code or shall fail to comply with any
of the requirements thereof or who shall erect, install, alter or
repair private sewage disposal work in violation of the approved construction
documents or directive of the Code Official, or a permit or certificate
issued under the provisions of this code, shall be guilty of a misdemeanor
and upon conviction thereof shall be punishable by a fine of not more
than five hundred dollars ($500.00). Each day that a violation continues
after due notice has been served shall be deemed a separate offense.
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(SECTION 115 STOP WORK ORDER)
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115.2 Issuance. The stop work order shall be in
writing and shall be given to the owner of the property involved,
the owner's authorized agent or the person performing the work.
Upon issuance of a stop work order, the cited work shall immediately
cease. The stop work order shall state the reason for the order and
the conditions under which the cited work will be authorized to resume.
Any person served with a stop work order shall pay an administrative
penalty of up to two hundred fifty dollars ($250.00).
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(CHAPTER 3 GENERAL REGULATIONS)
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(SECTION 302 SPECIFIC LIMITATIONS)
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302.6 Water softener and iron filter backwash. Water
softener or iron filter discharge shall be discharge onto the ground
surface, provided that a nuisance is not created.
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(CHAPTER 4 SITE EVALUATION AND REQUIREMENTS)
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(SECTION 403 SOIL BORINGS AND EVALUATION)
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403.1 Soil borings and profile descriptions. Soil
borings shall be conducted on all sites, regardless of the type of
private sewage system planned to serve the parcel. Borings shall extend
at least three (3) feet (914 mm) below the bottom of the proposed
system. Borings shall be of sufficient size and extent to determine
the soil characteristics important to an on-site liquid waste disposal
system. Borehole data shall be used to determine the suitability of
soils at the site with respect to zones of seasonal or permanent soil
saturation and the depth to bedrock. The use of power augers for soil
borings is prohibited. Soil borings shall be conducted and reported
in accordance with Sections 403.1.1 through 403.1.5. Where it is not
practical to have borings made with a backhoe, such borings shall
be augered or dug by hand.
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403.1.1 Number. There shall be not
less than two (2) borings per soil absorption site. Where necessary,
more soil borings shall be made for an accurate evaluation of a site.
Borings shall be constructed to a depth of not less than three (3)
feet (914 mm) below the proposed depth of the system.
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Exception: Three (3) borings are required
for repairs of existing private sewage disposal systems, along with
one (1) backhoe excavation at a 5-foot depth.
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(SECTION 404 PERCOLATION OR PERMEABILITY EVALUATION)
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404.1 General. The permeability of the soil in
the proposed absorption system shall be determined by permeability
evaluation.
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404.2 Percolation tests and procedures. Delete
in its entirety.
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404.2.1 Percolation test hole. Delete
in its entirety.
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404.2.2 Test procedure, sandy soils. Delete in its entirety.
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404.2.3 Test procedure, other soils. Delete in its entirety.
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404.2.4 Mechanical test equipment. Delete
in its entirety.
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(SECTION 406 SITE REQUIREMENTS)
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TABLE 406.1
MINIMUM HORIZONTAL SEPARATION DISTANCES FOR SOIL ABSORPTION
SYSTEMS
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ELEMENT
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DISTANCE
(feet)
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Cistern
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50
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Habitable building, below-grade foundation
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25
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Habitable building, slab-on-grade
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15
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Lake, high-water mark
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50
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Lot line (for new construction)
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30
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Lot line (for repairs)
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10
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Reservoir
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50
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Roadway ditches
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10
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Spring
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100
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Streams or watercoursea
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50
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Swimming pool
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15
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Uninhabited building
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10
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Water main
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50
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Water service
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10
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Water well
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100
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For SI: 1 foot = 304.8 mm.
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a.
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All natural watercourses depicted on the most current United
States Geological Survey (U.S.G.S) 7.5 Minute Series (Topographic)
Maps for St. Charles County, Missouri, shall be left in their natural
state.
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406.3 Percolation rate, trench or bed. Delete in
its entirety.
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406.4 Percolation rate, seepage pit. Delete in
its entirety.
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(CHAPTER 5 MATERIALS)
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(SECTION 501 GENERAL)
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501.2 Minimum standards. Materials shall conform
to the standards referenced in this code for the construction, installation,
alteration or repair of private sewage disposal systems or parts thereof.
All new construction requires NSF Class 1 tanks, unless otherwise
determined by Code Official.
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Exception: The extension, addition
to or relocation of existing pipes with materials of like grade or
quality in accordance with Sections 102.6 and 105.
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(SECTION 504 TANKS)
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504.1.2 Steel tanks. Delete in its entirety.
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TABLE 504.1.2 TANK CAPACITY. Delete in its entirety.
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(CHAPTER 6 SOIL ABSORPTION SYSTEMS)
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(SECTION 602 SIZING SOIL ABSORPTION SYSTEMS)
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602.1 General. Effluent from septic tanks and other
approved treatment tanks shall be disposed of by soil absorption or
an approved manner. Sizing shall be in accordance with this Chapter
for systems with a daily effluent application of three thousand (3,000)
gallons (11,356 925 L) or less. Two systems of equal size shall be
required for systems receiving effluents exceeding three thousand
(3,000) gallons (11,356 L) per day. Each system shall have a minimum
capacity of seventy-five percent (75%) of the area required for a
single system. An approved means of alternating waste application
shall be provided. A dual system shall be considered as one (1) system.
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(SECTION 603 RESIDENTIAL SIZING)
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603.1 General. All absorption fields shall be designed
based on soil morphology revaluation reports prepared by a certified
professional soil scientist or by a professional engineer licensed
by the State of Missouri.
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TABLE 603.1 MINIMUM ABSORPTION AREA FOR ONE- AND TWO-FAMILY
DWELLINGS Delete in its entirety.
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(SECTION 604 OTHER BUILDING SIZING)
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604.1 General. Calculations to determine the size
of absorption field shall be based upon sewage flow rates in Table
2A and soil groups in Tables 13 and 14 in 19 CSR 20-3.060 as currently
promulgated or as amended hereafter and as provided in that rule.
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TABLE 604.1(1) MINIMUM ABSORPTION AREA FOR OTHER THAN
ONE- AND TWO-FAMILY DWELLINGS. Delete in its entirety.
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TABLE 604.1(2) CONVERSION FACTOR. Delete in its
entirety.
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604.2 Drain Field Calculations, rounding. Calculation
for the length of the drain field shall be rounded up to the next
one hundred (100) lineal feet.
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(CHAPTER 7 PRESSURE DISTRIBUTION SYSTEMS)
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(SECTION 706 DOSING)
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706.1 General. The dosing frequency shall be not
greater than four (4) times daily. A volume per dose shall be established
by dividing the daily waste-water flow by the dosing frequency. The
dosing volume shall be not less than ten (10) times the capacity of
the distribution pipe volume. Table 706.1 provides the estimated volume
for various pipe diameters.
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TABLE 706.1 ESTIMATED VOLUME FOR VARIOUS DIAMETER PIPESa
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DIAMETER
(inches)
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VOLUME
(gallons per foot length)
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1
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0.041
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1-1/4
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0.064
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1-1/2
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0.092
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2
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0.164
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3
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0.368
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4
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0.655
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5
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1.47
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a.
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For any septic system that requires dosing, the pump tank shall
be a 1,000-gallon concrete single compartment tank equipped with effluent
pump with float and high-water alarm. A timer shall dose over a 24-hour
period, instead of on demand.
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(CHAPTER 8 TANKS)
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(SECTION 802 SEPTIC TANKS AND OTHER TREATMENT TANKS)
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802.1 General. Septic tanks shall be fabricated
or constructed of monolithic concrete, fiberglass or an approved material.
Tanks shall be watertight and fabricated to constitute an individual
structure, and shall be designed and constructed to withstand anticipated
loads. The design of prefabricated septic tanks shall be approved.
Plans for site constructed concrete tanks shall be approved prior
to construction.
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802.2 Design of septic tanks. Septic tanks shall
conform to the design standards set out in 19 CSR 20-3.060(4), as
currently promulgated or as amended hereafter.
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802.7.1 Sizing of tank. The minimum liquid capacity
for one- and two-family dwellings shall be in accordance with Table
802.7.1.
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TABLE 802.7.1
SEPTIC TANK CAPACITY FOR ONE- AND TWO-FAMILY DWELLINGS
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NUMBER OF BEDROOMS
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SEPTIC TANK (gallons)
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1 - 3
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1,000
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4
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1,250
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5
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1,500
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6 or more
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footnote a
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For SI: 1 gallon = 3.785 L.
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a.
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For six (6) or more bedrooms, the septic tank shall be sized
on the basis similar to an establishment as set out in 19 CSR 20-3.060(4)(B)17.
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802.7.2 Other buildings. For buildings, the liquid
capacity shall be increased above the 750-gallon (2839 L) minimum
as established in Table 802.7.1. In buildings with kitchen or laundry
waste, the tank capacity shall be increased to receive the anticipated
volume for a 24-hour period from the kitchen or laundry or both. The
liquid capacities established in Table 2A "Quantities of Domestic
Sewage Flows" in Section B 19 CSR 20-3.060 do not include employees.
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Exception: One- or two-family dwellings.
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TABLE 802.7.2 ADDITIONAL CAPACITY FOR OTHER BUILDINGS. Delete in its entirety.
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802.8 Installation. Septic and other treatment
tanks shall be located with a horizontal distance not less than specified
in Table 1 "Minimum Set-Back Distances" in 19 CSR 20-3.060(4), as
currently promulgated or as amended hereafter, except that for new
construction: (a) sewage tanks shall be one hundred (100) feet from
any private water supply; and (b) both sewage tanks and absorption
fields (disposal areas) shall be thirty (30) feet from any property
line. Tanks installed in ground water shall be securely anchored.
A 3-inch-thick (76 mm) compacted bedding shall be provided for all
septic and other treatment tank installations. The bedding material
shall be sand, gravel, granite, limerock or other non-corrosive materials
of such size that the material passes through a 0.5-inch (12.7 mm)
screen.
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TABLE 802.8 MINIMUM HORIZONTAL SEPARATION DISTANCES FOR
TREATMENT TANKS. Delete in its entirety.
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802.11.1 Capacity sizing. The working capacity
of the dosing or pumping chamber shall be sized to permit automatic
discharge of the total daily sewage flow with discharge occurring
not more than 4 times per 24 hours. Minimum capacity of a dosing chamber
shall be 1,000 gallons (3,790 L) and a space shall be provided between
the bottom of the pump and floor of the dosing or pumping chamber.
A dosing chamber shall have a 1-day holding capacity located above
the high-water alarm for one- and two-family dwellings based on 120
gallons (455 L) per day per bedroom, or in the case of other buildings,
in accordance with Section 802.7. For one- and two-family dwellings,
pump chambers shall at a minimum be 1,000-gallon, single compartment,
time-dosed tanks. Where the total developed length of distribution
piping exceeds 1,000 feet (305 m), the dosing or pumping chamber shall
have 2 siphons or pumps dosing alternately and serving 1/2 of the
soil absorption system.
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TABLE 802.11.1 PUMP CHAMBER SIZES. Delete in its
entirety.
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TABLE 903.1(3) DESIGN CRITERIA FOR A THREE-BEDRROM HOME
FOR A MOUND ON A 0% TO 6% SLOPE WITH LOADING RATES OF 450 GALLONS
PER DAY FOR SLOWLY PERMEABLE SOIL. Delete in its entirety.
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TABLE 903.1(4) DESIGN CRITERIA FOR A FOUR-BEDRROM HOME
FOR A MOUND ON A 0% TO 6% SLOPE WITH LOADING RATES OF 600 GALLONS
PER DAY FOR SLOWLY PERMEABLE SOIL. Delete in its entirety.
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TABLE 903.1(5) DESIGN CRITERIA FOR A ONE-BEDRROM HOME
FOR A MOUND ON A 0% TO 12% SLOPE WITH LOADING RATES OF 150 GALLONS
PER DAY FOR SLOWLY PERMEABLE SOIL OVER BEDROCK. Delete in its
entirety.
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TABLE 903.1(6) DESIGN CRITERIA FOR A TWO-BEDROOM HOME
FOR A MOUND ON A 0% TO 12% SLOPE WITH LOADING RATES OF 300 GALLONS
PER DAY FOR SLOWLY PERMEABLE SOIL OVER BEDROCK. Delete in its
entirety.
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TABLE 903.1(7) DESIGN CRITERIA FOR A THREE-BEDROOM HOME
FOR A MOUND ON A 0% TO 12% SLOPE WITH LOADING RATES OF 450 GALLONS
PER DAY FOR SLOWLY PERMEABLE SOIL OVER BEDROCK. Delete in its
entirety.
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TABLE 903.1(8) DESIGN CRITERIA FOR A FOUR-BEDROOM HOME
FOR A MOUND ON A 0% TO 12% SLOPE WITH LOADING RATES OF 600 GALLONS
PER DAY FOR SLOWLY PERMEABLE SOIL OVER BEDROCK. Delete in its
entirety.
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TABLE 903.1(9) DESIGN CRITERIA FOR A ONE-BEDROOM HOME
FOR A MOUND ON A 0% TO 12% SLOPE WITH LOADING RATES OF 150 GALLONS
PER DAY FOR SLOWLY PERMEABLE SOIL WITH A HIGH WATER TABLE. Delete
in its entirety.
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TABLE 903.1(10) DESIGN CRITERIA FOR A TWO-BEDROOM HOME
FOR A MOUND ON A 0% TO 12% SLOPE WITH LOADING RATES OF 300 GALLONS
PER DAY FOR SLOWLY PERMEABLE SOIL WITH A HIGH WATER TABLE. Delete
in its entirety.
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TABLE 903.1(11) DESIGN CRITERIA FOR A THREE-BEDROOM HOME
FOR A MOUND ON A 0% TO 12% SLOPE WITH LOADING RATES OF 450 GALLONS
PER DAY FOR SLOWLY PERMEABLE SOIL WITH A HIGH WATER TABLE. Delete
in its entirety.
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TABLE 903.1(12) DESIGN CRITERIA FOR A FOUR-BEDROOM HOME
FOR A MOUND ON A 0% TO 12% SLOPE WITH LOADING RATES OF 600 GALLONS
PER DAY FOR SLOWLY PERMEABLE SOIL WITH A HIGH WATER TABLE. Delete
in its entirety.
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TABLE 903.5.5 DOWNSLOPE AND UPSLOPE WIDTH CORRECTIONS
FOR MOUNDS ON SLOPING SITES. Delete in its entirety.
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TABLE 903.6 INFILTRATIVE CAPACITY OF NATURAL SOIL. Delete in its entirety.
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