HomeMy WebLinkAboutR87-07 Amending/Readopting Individual Sewage Disposal RegulationsCommissioner �-P_1a// moved adoption
of the following Resolutions
EAGLE COUNTY BOARD OF HEALTH
COUNTY OF EAGLE, STATE OF COLORADO
RESOLUTION NO. 87-
A RESOLUTION AMENDING AND READOPTING THE EAGLE COUNTY
INDIVIDUAL SEWAGE DISPOSAL REGULATIONS, 1980, AS
AMENDED, AS THE SAME ARE INCORPORATED INTO AND MADE A
PART OF THE EAGLE COUNTY LAND USE REGULATIONS, 1982,
AS AMENDED.
WHEREAS, the Board of County Commissioners of the County
of Eagle, Colorado, in its capacity as the Eagle County Local
Board of Health, hereinafter referred to as the "Board," is
authorized pursuant to Article 10, Title 25 of the Colorado
Revised Statutes, to adopt standards, rules, and regulations
for individual sewage disposal systems in the County of Eagle,
and to provide for the administration and enforcement of such
standards, rules and regulations in order to preserve the
environment and protect the public health; to eliminate and
control causes of disease, infection, and aerosol contamina-
tion; and to reduce and control the pollution of the air,
land, and water; and
WHEREAS, the Board did on the 11th day of February, 1980,
adopt Resolution jNo. 80 -11 _entitled "Ragle County-Individual
Sewage Disposal Regulations, 1980" ( "ISDS "), which established
minimum standards for the location, construction, performance,
installation, alternation, and use of individual sewage
disposal systems within Eagle County, and adopted rules and
regulations concerning the application for and issuance of
permits; the inspection, testing, and supervision of installed
systems; the issuance of cease and desist orders; the mainten-
ance and cleaning of the systems; and the disposal of water
material; and
WHEREAS, at its regular meeting held the 25th day of
August, 1981, the Board did amend and readopt Resolution No.
80 -11 to provide for increased ISDS permit application fees
pursuant to H.B. 1048 (1981), and to provide construction
standards for seepage beds; and
WHEREAS, the Board did on the 23rd day of September,
1986, and the 26th day of January, 1987, hold public hearings
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to consider the amendment and readoption of the Eagle County
ISDS Regulations, 1980, as amended, to comply with the 1985
revision of the Colorado Department of Health Individual
Sewage Disposal System guidelines; and
WHEREAS, public notice of said hearings was duly published
in the Eagle Valley Enterprise in accordance with Colorado
Law.
NOW, THEREFORE, be it resolved by the Board of County
Commissioners of the County of Eagle, Colorado in its capacity
as the Local Board of Health:
THAT, the Eagle County Individual Sewage Disposal Regula-
tions, 1980, as amended, is hereby amended as set forth in
Exhibit "A" attached hereto and incorporated herein by this
reference.
THAT, the entirety of the Eagle County Individual Sewage
Disposal Regulations, 1980, as herein amended, is hereby
readopted.
THAT, this amendment and the readoption of the Eagle
County Individual Sewage Disposal Regulations, 1980, as
amended, shall not constitute nor be construed as waiver of
any violations existing at the time of this Resolution.
THAT, a copy of the above amendments shall be kept in the
office of the Board of County Commissioners, County of Eagle,
Colorado, and the office of the Eagle County Environmental
Health Department, and there made available for public
THAT, the provisions of this Resolution and the amend-
ments adopted pursuant thereto are severable. If any section,
sentence, clause, or phrase of this Resolution and /or said
amendments is adjudged by a court of competent jurisdiction to
be invalid, the decision shall not affect the validity of the
remaining portion of this Resolution and /or amendments adopted
pursuant thereto.
THAT, the Department of Eagle County Environmental Health
is directed to transmit a certified copy of this Resolution
with the amendments attached as Exhibit "A" hereto to the
State of Colorado Department of health not later than five (5)
days after final adoption of this Resolution.
THAT, this Resolution, and the amendments adopted hereby,
shall become effective on March 12, 1987, unless the State of
Colorado Department of Health notifies the Eagle County Board
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of Health that said amendments are not in compliance with
§§ 25 -10 -105 and 25 -10 -106, respectively, C.R.S., prior to
March 12, 1987.
THAT, this Resolution is necessary for the public health,
safety and welfare of the citizens of Eagle County.
MOVED, READ AND ADOPTED by the Board of County Commis-
sioners of the County of Eagle, State of Colorado, in its
capacity as the Eagle County Board of Health, at its regular
meeting held the 26th day of January, 1987, nunc pro tunc
September 23, 1986.
COUNTY OF EAGLE, STATE OF
COLORADO, By and Through Its
BOARD OF COUNTY COMMISSIONERS
By:
Richard L. Gustafson, Chairman
Donal Ham. Welch, 'Commissioner
Commissioner a 4 seconded adoption
of the foregoing resolution. The roll having been called, the
vote was as follows:
Commissioner
Donald H.
Welch
a
Commissioner
Richard L.
Gustafson
Se/�
Commissioner
George A.
Gates
This Resolution passed by '� * C) vote of the
County Commissioners of the County of Eagle, State
sitting in its capacity as the Eagle County Board
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Board of
of Colorado,
of Health.
CHAPTER IV
INDIVIDUAL SEWAGE DISPOSAL SYSTEMS
* * * TABLE OF CONTENTS *'* *
SECTION #
CONTENT
4.01
General Provisions
4.02
Definitions
4.03
Administration and enforcement
4.04
General and Technical Requirements
_ 4.05
Soil Tests
4.06
Component Design Criteria (General)
4.07
Component Design Criteria (First Stage
Treatment Units)
4.08
Component Design Criteria (Second or Later
Stage Treatment Units)
4.09
Design Criteria (Other Facilities)
4.10
Treatment Systems Other Than Those Discharging
Through a Soil Absorption or Sand Filter System
and Non - discharging Systems
4.11
Manufactured units Utilizing Mechanical
Apparatus for Treatment of Sewage
4.12
Effluent Discharged to State Waters
4.13
Water Quality Control Commission Regulations
4.14
Installations
4.15
Operation and Maintenance
TABLES
TABLE 1 - Maintenance, Cleaning and Effluent Testing
Schedules
TABLE 2 - Table of Quantities and BODS Strength of
Sewage
TABLE 3 - Table of Minimum Horizontal Distances Between
Components of a Sewage Disposal System and
Pertinent Physical Features
EXHIBIT A (68 numbered pages)
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.ABLE OF CONTENTS ( Continued )
TABLES
TABLE 4 - Septic Tank Size Based on Number of Bedrooms
TABLE 5 - Subsurface Absorption Area for Dwelling Use
APPENDIXES
APPENDIX A - Statement of Basis and Purposes
APPENDIX B - Soil Classification Systems
(Soil - Seperate Size Limits)
APPENDIX C - Guide for Textural Classification
APPENDIX D - Guide for Soil Compaction
F ,Y
CHAPTER IV
INDIVIDUAL SEWAGE DISPOSAL SYSTEMS
4.01 GENERAL PROVISIONS
4.01.01 TITLE
These Regulations shall be known as the Individual
Sewage Disposal Systems Regulations.
4.01.02 DECLARATION
In order to preserve the environment and protect the
public health; to eliminate and control causes of
disease, infection, and aerosol contamination; and to
reduce and control the pollution of the air, land,
and water, it is declared to be in the public
interest to establish minimum standards, rules, and
regulations for individual sewage disposal systems in
Eagle County and to provide the authority for the
administration and enforcement of such minimum
standards, rules, and regulations.
4.01.03 PURPOSE
The purpose of these Regulations as authorized and
required by Article 10, Title 25, C.R.S. 1973 is to
provide guidance and establish minimum standards for
the location, construction, performance,
installation, alteration, and use of individual
sewage disposal systems within Eagle County, and
shall constitute the basis for the adoption of
detailed rules and regulations by the Eagle County
Board of Health concerning the application for and
issuance - permits, the inspection, testing', and
supervision of installed systems, the issuance of
cease and desist orders, the maintenance and cleaning
of systems, and the disposal of waste material.
4.01.04 POLICY
The Eagle County Board of Health declares that the
purpose of these Regulations is to protect the
Physical and mental health of the people, to control
communicable diseases, and to regulate wastes from
dwellings, business, industrial, and public
buildings. These Regulations shall be applicable
throughout Eagle County, and shall be enforced by the
Board of Health. These Regulations are designed to
control construction, location, and operation of
sewage disposal systems, the transportation and final
disposal of sewage materials, and control of
installers of such systems. Eagle County Board of
Health declares that its general policy is to require
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the use of public sewer systems where and whenever
feasible, and to limit the installation of individual
sewage disposal systems only to areas that are not
feasible for public sewers.
4.01.05 CAPACITY
These Regulations shall apply to individual sewage
disposal systems with a design capacity of 2,000
gallons or less per day.
4.01.06 TIME FRAME
Unless conditions permit, such conditions shall
include but not be limited to weather, snowfall,
frost, and at the discretion of the Department, no
permits for new construction will be issued between
November 15 and March 15. Installation must be '
completed by December 1 for all new construction for
which permits were issued prior to November 15.
4.02 DEFINITIONS
4.02.01 GENERAL
The following definitions shall apply in the
interpretation and enforcement of these Regulations.
The word "shall" as used herein indicates a mandatory
requirement.
4.02.02 ABSORPTION BED
Absorption Bed means a subsurface soil absorption
area which consists of trenches wider than three (3)
feet each, containing a minimum of twelve (12) inches
of clean aggregate, together with a-- system of -
perforated distribution-pipes through which effluent
may seep or leach into the surrounding soil. (A
synonym for "Seepage Bed ")
4.02.03 ABSORPTION SYSTEM
Absorption System means a leaching field and adjacent
soils or other system for the treatment of sewage in
an individual sewage disposal system by means of
absorption into the ground.
4.02.04 ABSORPTION TRENCH
Absorption Trench means one or more trenches not over
three (3) feet in width of varying length and depth
in which sewage effluent is percolated into the soil.
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4.02.05 ACCEPTABLE DESIGN
Acceptable Design Means a standardized design of a
tank, plant, or system, the installation of which is
permitted by the Department, provided that site
requirements are met.
4.02.06 AEROBIC SEWAGE TREATMENT SYSTEM
Aerobic Sewage Treatment System means an individual
sewage disposal system employing biological action
which is maintained by the addition of air or oxygen.
4.02.07 ANALYTICAL PARAMETERS
Analytical Parameters means:
1. Suspended Solids (SS): Solids in the sewage
that can be removed readily by standard
filtering procedures in a laboratory, reported
as milligrams per liter (mg /1).
2. Volatile Suspended Solids (VSS): The quantity
of solids in sewage which are lost on ignition
of the dry suspended "solids at 600 degrees C.,
reported as percent of total suspended solids.
3. Settleable Solids: Solids in the sewage which
will settle, as distinct from remaining in
suspension reported as milliliters per liter of
sample after 30 minutes of settling time (ml /30
mins.).
4. pH: The logarithm of the reciprocal of the
hydrogen -ion concentration.
5. Dissolved Oxygen (DO): The oxygen dissolved in
sewage reported as milligrams per liter (mg /1).
6. Chemical Oxygen Demand: The measure of oxygen
equivalent of that portion of organic matter
that can be oxidized by a strong chemical
oxidizing agent and reported as milligrams per
liter (mg /1).
7. Five -Day Biochemical Oxygen Demand (BODD : The
quantity of oxygen used in the biochemical
oxidation of organic matter in five days at 20
degrees C. under specific conditions reported
as milligrams per liter (mg /1).
4.02.08 APPLICANT
Applicant means any person who submits an application
for a permit for an individual sewage disposal
system.
4.02.09 APPROVED
Approved means official consent given in writing by
the Board of Health.
4.02.10 BEDROCK
Bedrock means the more or less solid undisturbed rock
in place either at the surface or beneath surfacial
deposits of gravel, sand, or soil or a consolidated
rock formation of impervious material which may
exhibit jointed, fractured, or deteriorated
characteristics.
4.02.11 BOARD OF HEALTH
Board of Health means the Board of County
Commissioners of Eagle County, Colorado.
1.
4.02.12 BUILDING SEWER
Building Sewer means that part of the piping of a
drainage system which extends from the end of the
building drain and which receives the discharge of
the building drain and conveys it to a public sewer,
private sewer, individual sewage disposal system, or
other point of disposal.
02.13, CESS
Cesspool means a covered underground receptacle which
receives untreated sewage from a building and permits
the untreated sewage to seep into surrounding soil.
4.02.14 CISTERN
Cistern means a water tight, covered receptacle of
non -toxic material which is designed for potable
water storage.
4.02.15 COMPETENT TECHNICIAN
Competent Technician means a person designated by the
Department who is able to conduct and interpret the
results of percolation tests.
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4.02.16 COMPONENT PARTS
component Parts means all physical, mechanical, and
electrical components of an aeration plant.
4.02.17 COMPOSTING TOILET
Composting Toilet means a unit which consists of a
toilet seat and cover over a riser which connects to
a compartment or vault that contains or will receive
composting materials sufficient to reduce waste by
aerobic decomposition.
4.02.18 DEPARTMENT
Department means the Eagle County Department of
Environmental Health as appointed by the Eagle County
Commissioners.
4.02.19 DISPERSAL SYSTEM
Dispersal System means a system for the disposal of
effluent after final treatment in an individual
sewage disposal system, by a method which does not
depend upon or utilize the treatment capability of
the soil.
4.02.20 DISTRIBUTION BOX
Distribution Box means a watertight chamber below the
outlet level of a septic tank or treatment unit and
from which effluent enters the absorption system.
4.02.21 DIVERSION. VALVE
Diversion Valve means a-311 to 6" two -way valve with
one (1) inlet and two (2) outlets where sewage flow
can be diverted into two (2) separate and different
directions. It must be provided with a valve key or
control unit that can be operated from the surface of
the ground.
4.02.22 DOSING TANK
Dosing Tank means a tank which provides for a high
rate, periodic discharge.
4.02.23 DRY WELL
Dry Well means a subsurface absorption system
dependent upon suitable soil at a depth greater than
that of an absorption trench or bed (holes 5 to 15
feet in diameter and 2 to 10 feet deep), designed on
the basis of sidewall area (lined with concrete rings
or block or equal material). (A synonym for "Seepage
Pit ")
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4.02.24 EFFECTIVE SIZE
Effective Size of granular media is that size such
that 10% by weight of the media is finer than this
size.
4.02.25 EFFLUENT
Effluent means the liquid waste discharge from an
individual sewage disposal system.
4.02.26 EVAPOTRANSPIRATION SYSTEM
Evapotranspiration System means a type of dispersal
system that wholly or primarily utilizes liquid
evaporation or transpiration by vegetation as a means
of effluent disposal.
4.02.27 EXPERIMENTAL SYSTEM
Experimental System means a particular design or type
of system based upon improvements, or development in
the technology of sewage disposal in which further
testing is required in order to provide sufficient
information before acceptance and not otherwise
provided for in paragraphs (e) to (j) of 25 -10 -105
(1), C.R.S. 1973.
4.02.28 GEOLOGIST
Geologist means a person engaged in the practice of
geology.
4.02.29 GROUNDWATER TABLE
Groundwater Table means the upper surface of
groundwater in the zone of saturation of geologic
formation.
4.02.30 GUIDELINES
Guidelines means minimum requirements as described in
the Colorado Guidelines on Individual Sewage
Dispsosal Systems, Chapter 25, Ariticle 10, C.R.S.
1973, as amended.
4.02.31 HEALTH OFFICER
Health Officer means the chief administrative and
executive officer of the Department or the appointed
health officer designated by the Board of Health.
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4.02.32 HOLDING TANK
Holding Tank means a watertight receptacle for the
retention of sewage either before, during, or after
treatment.
4.02.33 INDIVIDUAL SEWAGE DISPOSAL SYSTEM, and the term
"SYSTEM"
Individual Sewage Disposal System and the term
"System" where the context so indicates mean an
absorption system of any size or flow or a system or
facility for treating, neutralizing, stabilizing, or
disposing of sewage which is not a part of or
connected to a sewage treatment works.
4.02.34 LINER
Liner means a watertight membrane liner of at least
0.01 inch (10 mil) thickness which is used to prevent
effluent from entering the soil or groundwater
table. Material shall be polyvinyl chloride or
material of equal integrity.
4.02.35 MANUFACTURER
Manufacturer means the person or firm that constructs
or assembles individual sewage treatment system
components.
4.02.36 MATRIX
Matrix means the material in which effluent is
dispersed for percolation or_ capillary action.
4.02.37 MINI- SYSTEM
Mini - System means a system designed to accommodate
only wastes from sinks, lavatories, tubs, showers,
and laundry.
4.02.38 OWNER
Owner means the person who is owner of record of the
land on which an individual sewage disposal system is
to be designed, constructed, installed, altered,
extended, or used.
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4.02.39 PERCOLATION TEST(S)
Percolation Test(s) means a subsurface soil test at
the depth of a proposed absorption system or similar
component of an individual sewage disposal system to
determine the water absorption capability of the
soil, the results of which are normally expressed as
the rate at which one inch of water is absorbed.
4.02.40 PERMEABILITY
Permeability means the property of a material which
permits movement of water through the material.
4.02.41 PERMIT
Permit means a permit for the construction or
alteration, installation, and use or for the repair
of an individual sewage disposal system.
4.02.42 PERSON
Person means individual, partnership, firm,
corporation, association, or other legal entity and
also the State, any political subdivision thereof, or
other governmental entity.
4.02.43 PLOT PLAN
Plot Plan means an accurate drawing or map indicating
the dimensions and location of property lines,
buildings, wells, individual sewage disposal systems,
water courses, geographical features, and other
pertinent information as required.
4.02.44 PRE- EXISTING, NON - CONFORMING SYSTEM
Pre - existing, Non- conforming System means an
individual sewage disposal system installed prior to
the 1973 adoption of Eagle County Regulations.
4.02.45 PRIVY
Privy means a structure allowing for the disposal of
excreta not transported by a sewer and which provides
privacy and shelter and prevents access to the
excrete by flies, rodents, or other animals.
4.02.46 PROFESSIONAL GEOLOGIST
Professional Geologist is a person who is a graduate
of an institution of higher education which is
accredited by a regional or national accrediting
agency, with a minimum of thirty semester (forty -five
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quarter) hours of undergraduate or graduate work in a
field of geology with a specific record of an
additional five years of geological experience to
include no more than two years of graduate work.
4.02.47 REGISTERED PROFESSIONAL ENGINEER
Registered Professional Engineer means an engineer
licensed in accordance with Section 12 -25 -111, C.R.S.
1973, as amended.
4.02.48 SAND FILTER
Sand Filter means a subsurface system which.utilizes
filtration or absorption or both, which contains an
intermediate layer of sand as filter material.
4.02.49 SAND FILTER TRENCHES
Sand Filter Trenches means a subsurface filtration
and absorption device which consists of a system of
trenches, each composed of perforated pipe or drain
tile surrounded by clean, coarse aggregate and also
containing an intermediate layer of sand as filter
material, together with an'underdrain for drainage of
the effluent.
4.02.50 SANITARIAN
Sanitarian means a person who is trained in physical,
biological, and sanitary science to carry out
inspectional and educational duties in the field of
environmental sanitation.
4.02.51 SEEPAGE PIT
Seepage Pit means a subsurface absorption system
dependent upon suitable soil at a depth greater than
that of an absorption trench or bed (holes 5 to 15
feet in diameter and 2 to 10 feet deep), designed on
the basis of sidewall area (lined with concrete rings
or block or equal material). (A synonym for "Dry
Well ")
4.02.52 SEPTIC TANK
Septic Tank means a watertight, accessible covered
receptacle designed and constructed to receive sewage
from a building sewer, to settle solids from the
liquid, to digest organic matter, and store digested
solids through a period of retention and allow the
clarified liquids to discharge to other treatment
units for final disposal.
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4.02.53 SERIAL DISTRIBUTION
Serial Distribution means an arrangement of
absorption trenches, seepage pits, or seepage beds
where effluent is retained to utilize the absorption
capacity of a component before flowing into a
succeeding component.
4.02.54 SEWAGE
Sewage means a combination of liquid wastes which may
include chemicals, house wastes, human excrete,
animal or vegetable matter in suspension or solution,
or other solids in suspension or solution and which
is discharged from a dwelling, building, processing
or manufacturing plant, institution, industrial
plant, or other establishment.
4.02.55 SEWAGE TREATMENT WORKS
Sewage Treatment Works means a system or facility for
treating, neutralizing, stabilizing, or disposing of
sewage, which system or facility has a designed
capacity to receive more than two thousand gallons of
sewage per day, unless designed as an absorption
system. The term "sewage treatment works" includes
appurtenances such as interceptors, collection lines,
outfall and the outlet sewers, pumping stations, and
related equipment.
4.02.56 STABILIZATION POND
Stabilization Pond means a reservoir or diked land
which receives liquid, to digest organic matter and
store diqested solids through_a period of ,retpntinn
and -allow -the clarified liquids to discharge to other
treatment units for final disposal.
4.02.57 STATE BOARD
Means the State Board of Health created by Section
25 -1 -103, C.R.S. 1973.
4.02.58 STATE WATERS
State Waters means any and all surface and subsurface
waters which are contained in or flow in or through
this State, except waters in sewerage systems, waters
in treatment works of disposal systems, waters in
potable water distribution systems, and all waters
withdrawn for use, until all uses and treatment have
been completed.
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4.02.59 SUBSURFACE SAND FILTER
Subsurface Sand Filter means a subsurface filtration
and absorption device which consists of a wide bed,
composed of a number of lines of perforated pipe or
drain tile, surrounded by a matrix of clean, coarse
aggregate containing an intermediate layer of sand as
a filtering material, and provided with a system of
underdrains for drainage of the effluent.
4.02.60 SUITABLE SOIL
Suitable Soil means a soil which will effectively
filter effluent by removal of organisms and - suspended
solids before the effluent reaches any highly
permeable earth such as joints in bedrock, gravels,
or very coarse soils. Such soils shall also meet the
requirements of both the absorption criteria or
percolation test requirements and have a vertical
thickness of at least four (4) feet.
4.02.61 SYSTEMS CLEANER
Systems Cleaner means a person engaged in and who
holds himself out as a specialist in the cleaning and
pumping of sewage disposal systems and removal of the
residues deposited in the operation thereof.
4.02.62 SYSTEMS CONTRACTOR
Systems Contractor means a person engaged in and who
holds himself out as a specialist in the
installation, renovation, and repair of sewage
disposal systems.
4.02.63 UNIFORMITY COEFFICIENT
Uniformity Coefficient means the ratio of 600 "finer
than" size to the 100 "finer than" size (both by
weight).
4.02.64 VAULT
Vault means an approved watertight, covered
receptacle, which is designed to receive and store
excreta or wastes either from a sewer or from a privy
and is accessible for the periodic removal of its
contents.
4.02.65 WASTEWATER POND
Wastewater Pond means a designed pond which receives
exclusively waste water from a first stage treatment
unit and which provides an additional degree of
treatment.
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4.02.66 WATER QUALITY CONTROL COMMISSION
Water Quality Control Commission means the commission
created by Section 25 -8 -201, C.R.S. 1973, as amended.
4.03 ADMINISTRATION AND ENFORCEMENT
4.03.01 GENERAL SANITATION REQUIREMENTS
The owners of any structure where people live, work,
or congregate shall insure that the structure
contains adequate, convenient, sanitary toilet and
sewage disposal systems in good working order. Under
no condition shall sewage effluent be permitted to be
discharged upon the surface of the ground, or into
waters of the State, unless the sewage or effluent
meets the Water Quality Standards of the Colorado
Water Quality Control commission, or the Colorado
Department of Health Guidelines Chapter 25, Article
10, C.R.S. 1973, as amended, whichever are
applicable.
4.03.02 INSPECTIONS AND RIGHT OF ENTRY
For this purpose of enforcing these Regulations, the
Health Officer is authorized to enter upon private
property for the purpose of determining whether or
not sewage disposal facilities installed thereon are
in compliance with these Regulations. The owner or
occupant of every property having an individual
sewage disposal system shall give the Health Officer
free access, after the Health Officer has given
reasonable notice, to the property for such survey or
inspection. If access is denied, the Health officer
may apply to the District Court of Eagle County for
an order authorizing entry.
4.03.03 PERMIT APPLICATION REQUIREMENTS
1) Prior to commencement of installation,
alteration, or repair of a system, a written
application therefor to the Environmental
Health Department shall be made providing, as a
minimum, the information called for on the
application form, and a permit shall have been
issued by the Environmental Health Department.
Revised 2) A permit fee of $150.00 shall be required of
per Res. applicants for new individual sewage disposal
dated systems, payable to Eagle County, at the
8/25/81 Environmental Health Department.
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Revised 3) A permit fee of $150.00 shall be charged for
per Res. alteration, enlargement, or any repair
dated involving alteration of an existing sewage
8/21/81 disposal system.
4) For minor repairs of less than $100 for
maintenance of the individual sewage disposal
system, no fee shall be required.
5) The local board of health may waive any permit
fee normally required for an individual sewage
disposal system.
4.03.04 PERMIT EXPIRATION
If both a building permit and an individual sewage
disposal permit are issued for the same property, and
construction is not commenced prior to the expiration
date of the building permit, the individual sewage
disposal permit shall expire at the same time as the
building permit. If an individual sewage disposal
permit is issued for property on which no building
permit has been issued, the individual sewage
disposal permit shall expire 120 days after its
issuance if construction has not been commenced. Any
changes in plans or specifications after permit has
been issued invalidates the permit, unless approval
is secured in writing from the Health Officer for
such changes. An expired permit may be extended or
renewed if:
1) There has been no change in plans and
specifications of the proposed system as set
out in the original application; and
2) The surrounding land, in its use or zoning,
have not changed so as to cause the original
application not to be acceptable under these
Regulations.
4.03.05 OWNER RESPONSIBILITY
The property owner shall be responsible for proper
maintenance of the system and for abatement of any
nuisance arising from its failure.
4.03.06 REPAIR /EMERGENCY USE PERMIT
The Environmental Health Department may issue a
repair permit and an emergency use permit to the
owner or occupant of property on which a system is
not functioning properly. Application for a repair
permit shall be made by such owner or occupant to the
Environmental Health Department within two business
days after receiving notice from the Department that
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the system is not functioning in compliance with
Section 25, Article 10, C.R.S. 1973, as amended. The
permit shall provide for a reasonable period of time,
not to exceed 30 days, as provided by Section 25,
Article 10- 106(k), C.R.S. 1973, as amended, within
which repairs shall be made. At the end of said
period of time, the system shall be inspected by the
Department to insure that it is functioning
properly. Concurrently with the issuance of a repair
permit, the Environmental Health Department may issue
an emergency use permit authorizing continued use of
a malfunctioning system on an emergency basis for a
period not to exceed the period stated in the repair
permit. Such an emergency use permit may be
extended, for good cause shown, in the event repairs
may not be completed in the period stated in the
repair permit through no fault of the owner or
occupant.
4.03.07 EXPANDED USE OF EXISTING SYSTEM
An individual sewage disposal system permit shall be
required for expanded use of an existing system.
4.03.08 PRE - EXISTING, NON- CONFORMING SYSTEM
Upon failure or need of repair or alteration,
pre- existing, non conforming systems must be brought
up to current regulations of a two - compartment septic
tank and the required square footage of absorption
area.
4.03.09 DEPARTMENT LIABILITY
The issuance of a permit and Specifications of __terms
and conditions -- therein -shall not constitute
assumption or create a presumption that the local
health department or its employees may be liable for
the failure of any system nor act as a certification
that the equipment used in the system or any
component thereof used in its operation or that the
system for which the permit was issued insures
continuous compliance with the provision of Article
10 of Title 25, C.R.S. 1973, the rules and
regulations adopted thereunder or any terms and
conditions of a permit.
14
3
4.03.10 RESPONSIBILITY FOR SYSTEM DESIGN
The Registered Professional Engineer or Technician of
the Health Department, acting on behalf of the
Department, shall determine the type of sewage
disposal systems which are suitable for the property,
and may give a conditional approval for a permit for
the proposed sewage disposal system; or may recommend
disapproval of the application and denial of a permit
if the proposed system cannot be made to comply with
these Regulations. The conditional approval shall
set forth conditions precedent to the issuance of a
permit including effluent testing, cleaning or
maintenance schedules, or other special conditions.
No permit shall be issued to the applicant or to a
subsequent owner until the conditions have been met.
Except as provided in Section 25 -10 -105, C.R.S. 1973,
as amended, no permits shall be issued for the
following systems unless they are designed by a
Registered Professional Engineer and after they have
been reviewed by the Board of Health:
1) Systems disposing of effluent into State
waters;
2) Systems disposing of effluent upon the ground;
3) Systems which service commercial, business,
institutions, industry, or multi - family
dwellings;
4) Absorption field for which the location cannot
meet suitable soil requirements;
5) Experimental systems.
4.03.11 DESIGN CAPACITY OVER 2,000 GALLONS PER DAY
In the case of any system with a design capacity over
2,000 gallons of sewage per day, or which discharges
effluent into State waters, or are designed to serve
20 or more persons per day, the Department may give
its conditional approval or may disapprove the
application. Thereafter the application, together
with the Department's recommendation, shall be
forwarded to the Water Quality Control Commission for
review. If either the Department or the Water
Quality Control Commission disapproves the
application, no final permit shall be issued.
15
� a
4.03.12 APPLICATION REVIEW
1) The application shall include such information,
data, plans, specifications, statements, and
commitments as required by the Department to
carry out the purpose of Title 25, Article 10,
C.R.S. 1973, as amended.
2) After receiving an application for an
individual sewage disposal system permit, the
application shall be reviewed by the
Environmental Health Department and an
inspection shall be made by the Health Officer
or his designated representative consisting of:
a) Inspection of the premises;
b) Evaluation of soil where percolation
tests are required;
C) A determination as to the suitability of
the site and of the proposed design based
upon verification of the groundwater
table, suitable,soil, depth to bedrock,
ground slope, and pertinent physical
features.
d) When specific evidence indicates that
subsurface conditions exist that may
endanger State Waters, additional
hydrological, geological, or engineering
information provided by a Registered
Professional Engineer or Geologist may be
required to be submitted by the
- applicant. This requirement "shall not
prejudice the right of the local health
department to develop its own information
from its own source.
e) When, in the opinion of the Health
Officer, the Department possesses
sufficient information to make one or
more provisions of this section
unnecessary, he may waive all or any part
thereof.
f) A determination shall be made on behalf
of the local health department by a
sanitarian or a registered professional
engineer after review of the application,
site inspection, test results, and other
required information, whether the
proposed system is in compliance with the
requirements of Article 10 of Title 25,
C.R.S. 1973 and applicable rules and
16
LL k
regulations adopted under said article,
after which a permit may be issued by the
Health Officer or his designated
representative if the proposed system is
determined to be in substantial
compliance with the requirements of
Article 10 of Title 25, C.R.S. 1973 and
the rules and regulations adopted
pursuant thereto.
4.03.13 INSPECTIONS REQUIRED
The permit issued shall specify the stage of
construction, installation, alteration, or repair at
which time the Environmental Health Department will
require an inspection. The owner of the system shall
provide the Department with notice that the progress
of the work has been sufficiently completed to allow
inspection before the system is covered and /or placed
in use. The inspection shall determine if the work
has been performed in accordance with the permit
requirements and to determine compliance of the
system with Title 25, Article 10, C.R.S. 1973, as
amended, and the rules and regulations adopted
thereunder.
4.03.14 NOTIFICATION OF COMPLETION
When construction of a sewage disposal system has
been completed, the systems contractor or owner shall
notify the Department and a representative of the
Department shall make a final inspection.
4.03.15 FINAL INSPECTION OF SYSTEM
If upon final inspection of the system the Health
Officer finds it installed in accordance with these
Regulation and the permit, the Health Officer shall
issue final approval for the completed system. If
the system has been designed by or constructed under
the supervision of a Registered Professional
Engineer, he shall at this time certify to the
Department that construction and installation of the
system has been completed in accordance with the
terms of the permit and these Regulations. If the
inspection discloses any significant departure from
the description or design of the system as stated in
the application and permit, or if any aspect of the
system fails to comply with these Regulations,
approval shall be withheld and the original permit
shall be deemed to have expired. Written notice of
deficiencies causing the disapproval shall be given
the systems contractor or owner within 10 days
following final inspection. The permit then may be
renewed upon payment of the fee as provided in
17
4.03.16
paragraph 4.03.03(2). Another inspection shall be .
made upon notification that the deficiencies have
been corrected and the system brought into compliance
with these Regulations.
DENIAL OF A PERMIT OR DISAPPROVAL OF PLANS
1)
2)
3)
Notice of Denial:
Written notice of the denial of a permit or
disapproval of plans shall be given within 10
days to the applicant by personal service or by
registered or certified mail, return receipt
requested. Service by mail shall be complete
upon receipt by the Department of the return
receipt.
Appeal to the Board of Health
Any person who is denied
for an individual sewage
disapproved, may appeal
as herein provided.
Variance on Appeal:
a permit, whose plans
disposal system are
to the Board of Health
Upon finding that strict enforcement of these
Regulations would cause undue hardship to the
applicant and a further finding that a variance
would not be injurious to public health, the
Board of Health may authorize the issuance of a
variance. The burden of proof is upon the
applicant to show that the variance will not
injure adjacent properties, will not conflict
with the purposes of these Regulations, and
will not adversely affect the health of any
person.
4) Time of Appeal:
Every appeal must be filed within thirty (30)
days from the date of denial.
5) Findings on Appeal:
Upon review from denial by the Eagle County
Board of Health, as provided by Section
25- 10- 106(1)(f), C.R.S. 1973, as amended, that
an applicant for an individual sewage disposal
system has demonstrated that said system will
be constructed and used in such a manner as to
comply with the declaration and intent of these
guidelines and all applicable regulations and
rules and required terms and conditions in any
permit issued thereto, a permit may be issued
therefore.
6) Finality of Denial:
Denial shall become final upon the expiration
of time for filing an appeal, or when final
action is taken upon an appeal, whichever is
later.
4.03.17 COMMUNITY SEWERS
Permits to construct, extend, or replace an
individual sewage disposal system shall be denied if
municipal or sanitation district sewers exist with
400 feet of the applicant's dwelling, place of
business, or institution; and if the municipality or
district agrees to provide service.
4.02.18 ACCEPTABLE DESIGN LIST
The Health Officer shall prepare a list of approved
septic tanks, aeration plants, evapotranspiration
systems, or other systems which can receive permits
for installation provided site and design
requirements are met. Manufacturers or designers may
request approval of standardized equipment or
systems. Approval shall be granted only after
submission of such information as may be requested by
the Department, or if the Colorado Department of
Health has previously approved the design. Designs
that meet all of the requirements of these
Regulations will be included on the list. The list
shall be revised annually and shall be available to
any person upon request. Any design may be reviewed
by the Health Officer at any time upon reasonable
notice if it complies with _these Regulations.
Experimental designs, properly identified as such,
which are undergoing testing, may be included on the
list with appropriate comments by the Health Officer.
4.03.19 EXPERIMENTAL SYSTEMS APPROVAL
Except for designs or types of systems which have
been approved by the Colorado Department of Health,
the Board of Health may approve an application for an
experimental type system not otherwise provided for
in these Regulations only if the system has been
designed by a Registered Professional Engineer, and
only if the application provides for the timely
installation of a backup system of an approved type
in the event of failure of the primary system. The
Board of Health shall not arbitrarily deny any person
the right to consideration of an application for such
a system and shall apply reasonable performance
standards in determining whether to approve such
application.
19
4.03.20 SUBMISSION OF PLANS FOR PROPOSED SUBDIVISIONS
Plans for proposed subdivisions shall be submitted to
this Department for review of proposed sewage
disposal systems. The plans shall be prepared by a
Registered Professional Engineer in accordance with
requirements of these Regulations and the
requirements of the Eagle County Department of
Environmental Health. The Health Officer may require
the subdivider to submit additional engineering or
geologic reports or data or to conduct a study of the
economic feasibility of the sewage treatment works
prior to making its recommendations.
4.03.21 REGULATIONS OF SYSTEMS CONTRACTORS
1) No systems contractor shall install, renovate,
or repair an individual sewage disposal system
unless he holds a valid Systems Contractor
License. Employees of a validly licensed
Systems Contractor shall not be required to be
licensed. The initial fee for a Systems
Contractor license shall be $25.00 per year.
Licenses shall expire on December 31 of each
year and an annual renewal fee of $10.00 shall
be charged. A license which expires because of
failure to renew or is revoked shall be subject
to the fee established for new licenses.
Application for a new license for a Systems
contractor whose license has been revoked shall
not be considered for at least one year after
revocation.
2) Standard of Performance Required of Holders of
Systems Contractors License: -
a) Applications for Systems Contractors
licenses or renewals shall be made upon
forms supplied by the Department.
b) Prior to the issuance or renewal of a
license, the Health Officer may require
the applicant to demonstrate adequate
knowledge of these Regulations.
C) Installation, renovation, or repair of
any individual sewage disposal system
shall be in compliance with these
Regulations and with the conditions set
out in the installation permit.
20
d) Notice of requested inspection shall be
given by the license holder not less than
24 hours before the inspection is to be
made.
e) A license holder shall deliver to the
owner the installation permit within 7
days after the completion of an approved
installation.
f) A license holder shall have in his
possession the installation permit at the
time of final inspection so that final
approval may be endorsed upon it..
g) A license holder shall, within a
reasonable time, return the installation
permit to the applicant or property owner
in the event that he cannot or does not
desire to begin the installation of the
individual sewage disposal system
3) Revocation of a Systems Contractor License:
a) A license may be revoked for failure to
comply with these Regulations.
Revocation shall take place only after a
hearing before the Board of Health. The
license holder shall be given not less
than ten (10) days' notice of the hearing
and may be represented at the hearing by
counsel.
b). Written notice of revocation-
- - particularizing the violations shall be
served upon the holder of the Systems
Contractor license. Service of notice as
required in this section shall be as
provided by the Colorado Rules of Civil
Procedure, or by registered or certified
mail, return receipt requested,
deliverable to addressee only.
C) The Board of Health shall from time to
time set qualification standards for
licensed Systems Contractors.
4.03.23 REGULATIONS OF SYSTEMS CLEANERS
1) No person shall engage in the cleaning of
sewage disposal systems or the transportation
of sewage to a disposal site unless he holds a
valid Systems Cleaner License. Employees of a
validly licensed Systems Cleaner shall not be
required to be licensed. The initial fee for a
21
Systems Cleaner shall be $25.00 per year.
Licenses shall expire on December 31 of each
year, and an annual renewal fee of $10.00 shall
be charged. A license which expires because of
failure to renew or is revoked shall be subject
to the fee established for new license upon
re- application. Application for a new license
by a Systems Cleaner whose license has been
revoked shall not be considered for at least
one (1) year after revocation.
2) Standard of Performance for Systems Cleaners:
a)
A license holder, when cleaning•a septic
tank or aeration plant, shall remove the
liquid, sludge and scum, leaving no more
than three (3) inches depth of sewage in
a non - backflowing septic tank or aeration
plant. In backflowing types of systems,
cleaning shall be effective in reducing
solids and scum to the point of a
near -new system.
b)
A license holder shall maintain his
equipment so as to insure that no
spillage of sewage will occur during
transportation and that his employees are
not subjected to undue health hazards.
C)
A license holder shall dispose of the
collected sewage only at a site
designated by the Eagle County Board of
Commissioners or by the Board of Health.
d)
prior to the issuance of or renewal of a
license, the Health Officer may require
the applicant to demonstrate adequate
knowledge of paragraph 4.03.23 (1),
(2) (a) (b) (c) .
3) Revocation of a Systems Cleaner License:
The
procedures as described in paragraph
4.03.21 (3) shall be followed for the
revocation of a Systems Cleaner License.
4.03.24 NOTICE OF
VIOLATION
Whenever the Health Officer determines that there has
been a violation of any provision of these
Regulations, he shall give notice of such violation
to the responsible person or persons. Such notice
shall be in writing, and shall particularize the
violation(s), provide a reasonable time for
22
correction, and be addressed to the owner and
occupant of the property concerned. Service of such
notice shall be provided by the Colorado Rules of
Civil Procedure, or by Registered or certified mail,
return receipt requested, deliverable to addressee
only. Service by mail shall be complete upon receipt
by the Department of the return receipt. If one or
more persons cannot be found or served after a
diligent effort to do so, service may be made by
posting a notice in a conspicuous place in or about
the property affected by the notice, in which case
the Health Officer shall include in the record a
statement as to why the posting was necessary.
4.03.25 CEASE AND DESIST ORDER
The Health Officer may issue an order to cease and
desist from the use of any system which is found by
the Health Officer not to be functioning in
compliance with these Regulations or which otherwise
constitutes a nuisance to public health and which has
not received the timely repairs in accordance with
the provisions of paragraph 4.03.06. Such an order
may be issued only after a hearing which shall be
conducted by the Health Officer not less than 48
hours after written notice is given to the owner or
occupant of the property on which the system is
located and at which the owner and occupant may be
present, with counsel, and be heard. The order shall
require that the owner or occupant bring the system
into compliance or eliminate the nuisance or hazard
within a reasonable period of time, not to exceed
thirty (30) days, or thereafter cease and desist from
the use of the system.
4.03.26 MAINTENANCE, CLEANING AND EFFLUENT TESTING SCHEDULES
In order to insure good working order, the following
schedule shall apply (as a minimum) to all individual
sewage disposal systems:
23
3
TABLE - 1
INSPECTION OR CLEANED OR ROUTINE EFFLUENT
TYPE OF TREATMENT MAINTENANCE PUMPED TESTING
1) Septic Tank Every 4 years Every 4 years Experimental on.
2) Vault; Privy Every 4 years Every 4 years None
3) Aeration Plant
a) State waters Every 6 months Every 8 years As req'd by WQC(
b) Surface discharge Every 6 months Every 8 years Every 6 months
c) Subsurface dispersal Every 6 months Every 8 years Every 6 months
d) Filter trench or bed Every 6 months Every 8 years Every year
e) Absorption field Every year Every 8 years Every 2 years
f) Non - discharge Every year Every 8 years Every 2 years
4) Experimental systems shall meet such conditions as are set out in the
permit. The owner shall be responsible for the required maintenance and
cleaning of his system. Samples may be taken at any time when necessary
to implement paragraphs 4.03.24 and 4.03.25 of these Regulations.
24
4.03.27 PROHIBITION OF INDIVIDUAL SEWAGE DISPOSAL SYSTEMS IN
UNSUITABLE AREAS
The Board of Health may conduct a public hearing,
after written notice to all affected property owners
as shown in the records of the County Assessor, and
publication of notice in a newspaper of general
circulation, at least ten (10) days prior to the
hearing, to consider the prohibition of permits for
individual sewage disposal systems in defined areas
which contain or are subdivided for a density of more
than two (2) dwelling units per acre. The Board of
Health may order such prohibition upon finding that
the construction and use of additional individual
sewage disposal systems in the defined area will
constitute a hazard to the public health. In such a
hearing, the Board of Health may request affected
property owners to submit engineering and geological
reports concerning the defined area and to provide a
study of the economic feasibility of constructing a
sewage treatment works.
4.03.28 GENERAL PROHIBITIONS
The following provisions specify general prohibitions
and are set forth for ease of reference but not as
guidelines herein:
1) No city or town in Eagle County shall issue to
any person a permit to construct or remodel a
building or structure which is not serviced by
a sewage treatment works, until a permit for an
individual sewage disposal system has been
issued by the Eagle County .,Environmental -- Health
-•
Department.
2) No city or town occupancy permit shall be
issued to any person for the use of a building
which is not serviced by a sewage treatment
works until a final inspection of the
individual sewage disposal system has been
issued by the Eagle County Environmental Health
Department, and the installation has received
the approval of same.
3) No individual sewage disposal system presently
in use which does not comply with the
provisions of Section 25- 10- 105(1)(e) regarding
minimum separation between the maximum seasonal
level of the groundwater table and the bottom
of an absorption system shall be permitted to
remain in use after October 1, 1975, without
compliance with this article and the rules and
regulations adopted under this article.
25
4) Construction of cesspools defined as covered'
underground receptacles which receive untreated
sewage from a building and permit the untreated
sewage to seep into surrounding soil is
prohibited.
5) Not more than one (1) dwelling, commercial,
business, institutional, or industrial unit
shall be connected to the same individual
sewage disposal system unless such multiple
connection was specified in the application
submitted and in the permit issued for the
system.
6) No person shall construct or maintain any
dwelling or other occupied structure which is
not equipped with adequate facilities for the
sanitary disposal of sewage without endangering
the public health.
4.03.29 PENALTIES
Any person who commits any of the following acts or
violates any of the provisions of this article
commits a Class I Petty Offense and defined in
Section 18 -1 -107, C.R.S. 1973, as amended:
1) Constructs, alters, installs, or permits the
use of any individual sewage disposal system
without first having applied for and received a
permit as provided in these Regulations.
2) Constructs, alters, or installs an individual
sewage disposal system in a manner wh
involves a` knowing and material varia
the terms or specifications contained
application or permit.
I
on from
in the
3) Violates the terms of a cease and desist order
which become final under the terms of these
Regulations.
4) Conducts a business as a Systems Contractor
without having obtained the license provided
for in these Regulations.
5) Conducts a business as a Systems Cleaner
without having obtained the license provided
for in these Regulations.
6) Willfully fails to submit proof upon request of
proper maintenance or cleaning of a system as
required by these Regulations.
26
a
y°
4.03.30 JURISDICTION
These Regulations are promulgated by the Eagle County
Board of Health under the authority of Chapter 25,
Article 10, C.R.S. 1973, as amended.
4.03.31 SEVERABILITY
If any regulation adopted hereunder or its
application to any person or circumstances is held
invalid, unconstitutional, void, or inoperative, such
holding shall not affect other provisions or
applications of these Regulations adopted hereunder.
The Board of Health hereby declares that in these
regards the regulations adopted hereunder are
severable, and that the Board of Health would have
adopted the remaining regulations hereof
notwithstanding such holding.
4.03.32 SAVING CLAUSE
The repeal of any regulation adopted hereunder shall
not deny any right, action, or cause of action which
arose under existing regulations.
4.03.33 EFFECTIVE DATE
These Regulations shall become effective 45 days
after final adoption.
4.04 GENERAL TECHNICAL REQUIREMENTS
4.04.01 CALCULATION OF, SEWAGE FLOW, AND CHARACTERISTIC
1) Where gallons per day and pounds of biochemical
oxygen demand (BODS),, per day can be obtained by
measurement of existing conditions, such data
shall be used. This allows local health
officials to require installation of a water
meter located to measure flow into the
individual sewage disposal system.
2) For new facilities, the following "Table of
Quantities and BODS Strength of Sewage" may be
used as a guide to represent average
conditions.
3) Maximum flow shall be considered as 150 percent
of average flow and shall be the basis for
design purposes unless otherwise established by
evidence satisfactory to the Health Officer.
27
4) To calculate the sewage flow for dwellings anal
mobile homes, use a figure of 3.5 persons per
dwelling unit or at least two (2) persons per
bedroom.
5) In no event may the system be designed for a
lesser capacity than the anticipated maximum
daily sewage flow or treatment requirements of
the sewage or wastes in the system.
6) The local Health Officer or his designated
agent may, at his discretion, allow reduction
in design flow for proven, permanently
installed water conservation devices.
7) The reduction in sizing of an individual sewage
disposal system due to dosing and water
conservation devices shall not exceed 25
percent.
WP�
�4
a
J
TABLE OF QUANTITIES AND BOD STRENGTH OF SEWAGE
TYPE OF ESTABLISHMENT GALLONS /PERSON /DAY LBS. BOD5 PER
(Average)
(Unless Otherwise
Stated)
Residential
PERSON /DAY
(Unless Otherwise
Stated)
Hotels & Motels without private baths 50 .15
Hotels and Motels with private baths 60 .15
Multiple family dwellings or apartments 75 .20
Rooming houses 50 .15
Single family dwellings 75 .20
Commercial & Miscellaneous
Airline Catering
Airports (not incl. food)
Airports
Bus service areas (not Incl. food)
Country clubs (not incl. food)
Day workers at offices
Drive —in theaters (not incl. food)
Factories and plants (excl. of indus-
trial wastes)
Laundries, self — service
and kitchen wastes)
Food service establishments (kitchen
wastes)
Food service establishments (with
paper service)
Additional for bars & cocktail lounges
Movie theaters, churches (not incl.
food)
Stores
Work or construction camps (semi-
permanent) with flush toilets
Work or construction camps (semi-
permanent) without flush toilets
Travel trailer parks with indivi-
water & sewage hook —up
Travel trailer parks without indivi-
dual water & sewage hook —up
3 gal /meal served .03 lbs /meal served
5 gal /passenger .02 lbs /passenger
10 gal /employee /day .06 lbs /employee /day
5 .02
30 .02
15 .06
10 gal /space /day .06 lbs /space /day
35 .08
sher /day _2 -.00 lbs /washer/
.10 gal /patron /day .06 lbs /meal served
3 gal /meal served .03 lbs /meal served
1.5 gal /meal served .01 lbs /meal served
2 .02
5 gal /seat /day .03 lbs /seat /day
400 gal /public toi— 2.00 lbs /public toi-
let /day let /day
50 .17
35 .02
100 /gal /unit /day .50 lbs /unit /day
29
50 gal /unit /day .17 lbs /unit /day
Institutional
!Hospitals
Institutions other than hospitals
Mobile home parks
Schools, boarding
Schools, day (without cafeteria, gym
or showers)
Schools, day (with cafeteria, but
not gym or showers)
Schools, day (with cafeteria, gym
and showers)
Recreational & Seasonal
J
250 gal /bed space/
day
125 gal /bed space/
day
75
100
15
20
25
.20 1bs /bed space/
day
.17 Ibs /bed space/
day
.20
.17
.04
®.
.10
Camps, day (no meals served)
.014
15
.002
.12
Camps, luxury resort
1.4
125
19.5
.17
Camps, resort (night & day) with
.021
24.8
.029
limited plumbing
50
.71
Camps, tourist, trailer or campground
100
gal /unit /day
.50
lbs /unit /day
Cottages and small dwellings
(seasonal occupancy)
50
.17
Country club
Shower
500
gal /fixture /day
.48
lbs /fixture /day
Bath
300
gal /fixture /day
.29
lbs /fixture /day
Lavatory
100
gal /fixture /day
.25
lbs /fixture /day
Toilet
150
gal /fixture /day
.18
lbs /fixture /day
Urinal
100
gal /fixture /day
.06
lbs /fixture /day
Sink
50
gal /fixture /day
.51
lbs /fixture /day
Public Park (during hours when
park is'open)
Flush Toilet
36
gal /fixture /hr.
.04
lbs /fixture /hour
Urinal
10
gal /fixture /hr.
.01
lbs /fixture /hour
Shower
100
gal /fixture /hr.
.10
lbs /fixture /hour
Faucet
15
gal /fixture /hr.
.04
lbs /fixture /hour
Swimming Pools and bathouses
10
.06
Separate Flow — Residential Use
Bath /Shower
Dishwasher
Kitchen Sink
Additional for Garbage Grinder
Laundry Washer
Lavatory
Water Closet
30
14.7
.014
1.8
.002
4.4
.045
1.4
.052
19.5
.037
8.4
.021
24.8
.029
a
A.04.02 MINIMUM HORIZONTAL DISTANCES BETWEEN COMPONENTS OF A
SYSTEM AND PHYSICAL FEATURES
1) Minimum horizontal distances from the various
components of a system to pertinent terrain
features, including streams, lakes, water
courses, springs, wells, subsoil drains,
cisterns, water lines, suction lines, gulches,
dwellings, other occupied buildings and
property lines, shall be in accordance with the
following "Table of Minimum Horizontal
Distances in Feet Between Components of a
Sewage Disposal System Installed After November
15, 1973, and Pertinent Physical Features."
2) New wells, springs or
suction lines and all
listed in the "Table"
located in accordance
requirements provided
following page.
potable water supply
other constructed units
shall be installed or
with the minimum distance
in the "Table" on the
3) The minimum horizontal distance required from
cut banks and fill areas to individual sewage
disposal system compohents discharging effluent
into or onto the surrounding soil shall be four
(4) times the height of the bank, measured from
the top edge of the bank. (See diagram below)
r/
h
y
31
4h ')
Absorption Trench
r
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Y
n
u
u
r
# O
# N
# N
# r+
#
L
I
C
�
U
m
j7
'J
C u
U
G E
L J
U C V
N
N
N
N
N
N
N
3 u y
V
#
#
N
N
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32
NOTE: The minimum distances shown above shall be maintained
between the system components and the physical
features described. Where soil, geological or other
conditions warrant, greater distances may be required
by the local board of health or by the Water Quality
Control Commission pursuant to C.R.S. 1973, 25 -8 -206
in accordance with the authority prescribed by law
and rules and regulations implemental of said
section. For repair or upgrading of existing systems
where the size of lot precludes adherence to these
distances, repaired facility shall not be closer to
water supply components than the existing facilities.
* components which are not water tight should not
extend into areas of the root system of nearby
trees. Distance shown shall not apply to
treatment plants or effluent lines where
recycling is permitted.
** Crossings may be permitted where pipelines are
constructed of sufficient strength to contain
flows under pressure.
* ** Add 8 feet additional distance for each 100
gallons per day of design flow over 1000
gallons per day.
33
4.05 SOIL TEST
4.05.01 LOCATION
Soil percolation tests shall be performed in at least
three (3) test holes in the area in which the
absorption system is to be located, spaced uniformly
over the proposed site, except there shall be no less
than one (1) test hole in any twelve hundred square
foot (1200 sq. ft.) area of the absorption system.
4.05.02 DIMENSIONS
1) The percolation test holes shall be from 4" to
12" in width or diameter, and shall be
terminated at the depth of the proposed
absorption system.
2) One soil profile test hole at least eight (8)
feet deep or to bedrock, whichever is first
reached, must be completed to give an
indication of the soil condition in the area
including that soil zone at least 4 feet below
the bottom of the proposed absorption system.
4.05.03 PROCEDURE
Percolation test holes in soil that is not frozen
shall be filled with water to a depth of 14 inches or
more at least 8 hours but not more than 24 hours
prior to making the water percolation test, and shall
be refilled with water if necessary to a depth of at
least 14 inches prior to final measurement. From a
fixed reference point, measure the time for water to
drop one inch within the lower 25- percent- depth of
the percolation test hole. The percolation rate
shall be reported in minutes of time per inch drop
(MPI). The field percolation rate shall be the
average rate of the percolation test holes after the
rate has stabilized in all the test holes observed in
the proposed absorption area. The field percolation
rate shall be used in calculating the absorption area
required for the proposed system. A rate faster than
5 minutes per inch (5 MPI) and slower than 60 minutes
per inch (60 MPI) shall render the location
unsuitable for an absorption system. Sites with
unsuitable percolation rates shall necessitate
additional soil evaluation and design by a Registered
Professional Engineer if an absorption system is to
be proposed.
34
}
4.05.04 PERFORMANCE OF PERCOLATION TESTS
1) The percolation test shall be performed by or
under the supervision of a Registered
Professional Engineer or by a competent
technician of the Environmental Health
Department unless the tests were previously
performed by a Registered Professional Engineer
and the results thereof submitted with the
application for the permit.
2) If the applicant demonstrates to the
satisfaction of the Environmental Health
Department that the system is not dependent
upon soil absorption, the requirement for
percolation tests may be waived.
4.05.05 ALTERNATE PERCOLATION TEST
Alternate percolation test procedures may be approved
by the Health Officer or his designated
representative providing the test results of
alternate procedures are substantially equivalent to
those determined using the test procedure detailed in
this section.
4.05.06 LOCATION OF THE GROUNDWATER TABLE
1) Direct visual observation of infiltrated water
at the maximum seasonal elevation in an 8 -foot
boring;
2) Observation of soil in a trench of at least an
8 -foot depth for evidence of., crystals of salts
left by groundwater table; or chemically
reduced iron in the soil, reflected by a dull
gray or mottled coloring;
3) Soil moisture tests indicating water
saturation;
4) Determination of the piezometric surface by
hydraulic gradient;
5) Or by other scientific methods approved by the
Board of Health.
4.05.07 SUITABLE SOIL CRITERIA
A suitable soil shall meet the following criteria:
1) Has at least a 4 -foot depth or permeable
stratum;
35
2) Is located without the maximum seasonal
groundwater table;
3) Has the capacity to adequately disperse the
designed effluent loading as determined by a
field percolation rate between 5 MPI and 60
MPI, or by other approved soil tests;
4) Does not exhibit inhibiting swelling
characteristics;
5) Does not visibly exhibit a jointed or fractured
patterns of an underlying bedrock;
6) Is not consolidated;
7) Acts as an effective filter within its depth
for the removal of pathogenic organisms and
suspended solids.
4.05.08 WATER TABLE
A test hole evaluation showing a dry condition
estimated or measured to be at least four feet below
the bottom of a proposed soil absorption system
during the wettest months may be considered prima
facie evidence that the maximum seasonal groundwater
table will be sufficiently below the bottom of the
proposed absorption system.
4.06 COMPONENT DESIGN CRITERIA (GENERAL)
4.06.01 RELIABILITY
Individual sewage disposal systems shall be designed
and constructed such that each component shall
function when installed and operated in a manner not
adversely affected by the normal operating conditions
including, erosion, vibration, shock, climate
conditions, and usual household chemicals used. Each
component shall be free of non - functional protrusions
or sharp edges, or other hazards, which could cause
injury to persons, animals, or properties. Design
shall be such as to exclude flies and rodents and to
prevent the creation of nuisances and public health
hazards. Design shall provide for efficient
operation and maintenance.
4.06.02 PLUMBING CODES
Plumbing fixtures, grease traps, building sewers,
vents, sewer lines and other appurtenances shall be
designed, operated, and maintained so as to comply
with the minimum requirements of the uniform Plumbing
Code, adopted by Eagle County.
36
4.06.03
4.06.04
4.06.05
4.06.06
ELECTRICAL EQUIPMENT, IF USED
All electrical
comply with the
Electrical Code
work, equipment,
requirements of
adopted by Eagle
IDENTIFICATION AND DATA MARKING
j
and material shall
the current National
County.
A permanent type plate or other indelible marking on
major components not constructed on the site where
installed shall be provided, so inscribed as to be
easily read and visible for the purpose of
inspection. Said inscription shall include the
following:
Name of manufacturer;
Model or serial number designation;
Maximum design capacity of the unit and
the unit of measurement.
STRUCTURAL INTEGRITY
Tanks shall be so constructed and installed so as to
withstand earth and hydrostatic pressures when full
and when empty. Metal or metal - coated tanks are not
approved. Other materials which result in an
adequate and durable construction and which resist
excessive corrosion or decay may be approved.
WATERTIGHT REQUIREMENT
Watertight tanks, vaults, or other units shall not
allow infiltration of groundwater or surface water
and shall not permit the release of waste water or
liquids therefrom through other than designed
openings.
4.06.07 ACCESSIBILITY FOR INSPECTION AND MAINTENANCE
Each treatment unit shall be equipped with an access
manhole located to permit periodic physical
inspection, collection, and testing of samples and
maintenance of all components and compartments
including but not limited to submerged bearings,
moving parts, tubes, intakes, slots, filters, inlet
and outlet baffles, and other devices.
37
4.06.08 INDICATORS OF FAILURE FOR SYSTEMS UTILIZING
MECHANICAL APPARATUS
A signal device shall be installed which will provide
a recognizable indication or warning to the user that
the system or component is not operating or is
operating but malfunctioning. This indication or
warning shall be in the form of a visual or audible
signal, or both.
4.06.09 SERVICEABILITY
Components shall be so designed and constructed that
when installed in accordance with manufacturer's
recommendations, they shall be capable of being
easily maintained, sampled, drained, pumped,
inspected, and cleaned.
4.06.10 SAMPLING ACCESS
Where a required final effluent sample cannot be
easily obtained, a sampling well shall be
constructed. The sampling well shall be accessible
and provided with a properly secured cover.
4.06.11 INSTRUCTIONS
The manufacturer shall provide clear, concise
instructions covering the unit which, when followed,
will assure proper installation and safe and
satisfactory operation.
4.06.12 SURFACE ACTIVITY
The surface of the yround over the individual sewage
disposal system or any part thereof, must be
restricted to activity or use which will permit the
system to function as designed and which will not
contribute to compaction of the soil nor to
structural loading detrimental to the capability of
the component to function as designed.
4.06.13 DISTRIBUTION BOX
A distribution box in not recommended, but
shall be of sufficient size to accommodate
necessary field lateral lines and shall be
constructed with the inlet invert at least
inch above the level of the outlet invert.
outlet invert shall be three (3) to six (6)
above the floor of the distribution box.
W:3
if used,
the
one (1)
The
inches
4.06.14 SEWAGE PUMPING SYSTEM WHERE APPLICABLE
1) Non -clog pump opening shall have at east 2
inch diameter solids handling capacity where
raw sewage is pumped or at least 3/4 inch
diameter solids handling capacity if previously
settled effluent is pumped.
2) Automatic liquid level controls shall be
provided to start and shut off pumps at a
frequency required by the design.
3) Pressure pipe shall be of sufficient strength
to accommodate pump discharge pressure and the
pipe shall be sized to maintain a velocity of 2
or more feet per second.
4) Automatic air release valves shall be installed
at high points in the pressure line where
necessary to prevent air locking.
5) A storage basin preceding the pump shall be
provided to allow pump cycling commensurate
with pump design capacity.
4.07 COMPONENT DESIGN CRITERIA (FIRST STAGE TREATMENT
UNITS)
4.07.01 SEPTIC TANK
1) A septic tank shall be constructed to permit
detention of incoming sewage for a minimum of
thirty (30) hours, or the capacity shall be
based upon the number of bedrooms according to
the following table:
TABLE - 4
SEPTIC TANK SIZE BASED UPON NUMBER OF BEDROOMS
Minimum Effective Liquid
Number of Bedrooms Tank Capacity (gallons)
2 or less 750
3 1000
4 1250
Each Additional 250
ii•]
.z
2) Septic tank design criteria:
a) Except for mini - systems the effective
liquid capacity shall be no less than 750
gallons.
b) Inlet invert shall be 3 inches higher
than the outlet invert.
C) Outlet tee or baffle shall extend above
the surface of the liquid to within one
inch of the underside of the tank top and
shall extend at least 14 inches below the
outlet invert.
d) The distance from the outlet invert to
the underside of the tank top shall be at
least 10 inches.
e) Liquid depth shall be a minimum of 30
inches and the maximum depth shall not
exceed the tank length or 60 inches,
whichever is less.
f) A septic tank shall have two or more
compartments or more than one tank may be
used in series to provide the following
capacity arrangement: The first
compartment of a septic tank shall hold
no less than 1/2 of the required
effective capacity.
g) The transfer of liquid from the first
compartment- to the second or-- succc,cive -
compartment shall be 'made at "a "liquid
depth of at least 14 inches below the
outlet invert but not in the sludge zone.
h) At least one access no less than 20
inches across shall be provided in each
compartment of a tank.
i) The opening cover of a septic tank
manhole, inspection port, or sampling
access port shall be no deeper than 8
inches below the finished grade.
3) Cast iron pipe or pipe meeting standard ASTM
3034 - PVC SDR 35 and Schedule 40 PVC pipe both
meet this standard - properly supported (the
words "properly supported" shall include but
not be
40
a'
limited to, that pipe surrounded by compacted
fill, encased in concrete, or metal
reinforcement of the pipe may be used upon
approval of the Department if the proposed
method is capable of preventing failure by
settling or tank displacement) to prevent
failure by settling shall extend from the
septic tank for a distance of at least five (5)
feet from the inlet and outlet ends.
4.07.02 AEROBIC SEWAGE TREATMENT SYSTEM
1) General Design:
The shape and design of an aeration
compartment, its inlet and outlet arrangements,
baffling and air application shall:
a) Allow for intimate mixing of applied
sewage, return solids, and applied air.
b) Prevent excessive short circuiting of
flow.
C) Prevent the deposit and buildup of solids
in the aeration compartment.
2) Method of Aeration:
The method of aeration shall be accomplished by
mechanical aeration, diffused air, or a
combination of these. The method of aeration
shall at all times maintain aerobic conditions
at the maximum organic loading in both the
aeration and settling compartments. -
4.07.03 INSTALLATION OF SEPTIC TANKS
1) Tanks are to be installed on a solid base and
shall be level. The tank shall be installed
with removable covers or manholes extended to
within 8 inches of finished grade in order to
provide access to the inlet and outlet devices
of each compartment for cleaning and
inspection. Roof drains, foundation drains,
area drains, or cistern overflows are not to
enter the tank or any part of the treatment
system.
2) The building sewer line to septic tank shall be
laid with a minimum fall of 1/8 inch per foot
(1/4 inch fall /ft. is recommended). Bends in
the building sewer shall be limited to 45
degree ells, or long -sweep quarter- bends. Cast
iron pipe is required whenever the building
41
sewer is located under a driveway. The building sewer
installation shall meet all of the requirements of the Uniform
Plumbing Code in effect at the time of installation. The inlet
and outlet pipes shall be grouted and sealed with waterproof
materials.
3) Backfilling around a septic tank shall be
accomplished in a manner to prevent settlement
and avoid undue strain on the tank and the
pipes entering and leaving the tank.
4) Abandoned septic tanks and vaults shall be
pumped and filled with soil or they shall be
removed.
4.08 COMPONENT DESIGN CRITERIA (SECOND OR LATER STAGE
TREATMENT)
4.08.01 SOIL ABSORPTION SYSTEM (GENERAL)
1) For a system treating and disposing of effluent
through a soil absorption system, the method
for calculating minimum absorption area shall
be based upon the amount of suitable soil and
the capacity of the soil to absorb liquids as
established by the percolation test and upon
design criteria and construction standards for
such type of absorption system.
2) Unless designed by a Registered Professional
Engineer and approved by the Eagle County Board
of Health (except that such approval may be
- - given by the Eagle County Board of Health if --
authorized by regulations for such systems
treating exclusively domestic wastes), no such
system may be permitted in areas under any of
the following conditions:
a) Where the soil percolation rate is slower
than one inch in 60 minutes (1 inch /hr)
or faster than one inch in 5 minutes (12
inches /hr) in soils of sandy texture
shall be permitted, or the percolation
may be slowed by soil treatment.
b) Where the maximum seasonal level of the
groundwater table is less than four (4)
feet below the bottom of the proposed
absorption system.
!fa
1
C) Where bedrock exists less than four (4)
feet below the bottom of the proposed
absorption system.
d) Where the ground slope is in excess of 30
percent.
3) Soil building or replacement will be permitted
to bring the soil within the requirements of
suitable soil. Refer to sections of these
Regulations and other suitable engineering
criteria for compaction, depth, volume,
density, etc.
4) Absorption Area
The minimum absorption area in square feet (A)
for an individual sewage disposal system shall
be determined as a function of the estimated
quantity of sewage flow in gallons per day (Q)
and the percolation rate in minutes per inch
(T) according to the formula:
Q
A = 5 X' F
NOTE: Where the percolation rate is found to
be faster than 5 MPI in soils of sandy texture,
the minimum value of "T" for use in this
formula shall not be less than "5 ".
5) Additional Area:
The absorption area so calculated may be
increased by not more than an additional 20
percent if wastes from a garbage grinder are
discharged into the system and by not more than
an additional 40 percent if wastes from an
automatic washing machine are discharged into
the system.
43
TABLE - 5
SUB- SURFACE ABSORPTION AREA FOR DWELLING USE
If
the Percolation
The minimum Absorption Trench
The minimum Absorption
Rate
is: (Minutes
Area is: (Square feet of trench Area Seepage Bed:
for
water to fall
Bottom
per bedroom)
(Square feet of bottom
1
inch)
of bed per bedroom)
5
mins per inch
125 sq.
ft. of trench /bedroom
165 sq. ft. /bedroom
10
mins per inch
165 sq.
ft. of trench /bedroom
215 sq. ft. /bedroom
15
mins per inch
200 sq.
ft. of trench /bedroom
260 sq. ft. /bedroom
30
mins per inch
250 sq.
ft. of trench /bedroom
325 sq. ft. /bedroom
45
mins per inch*
300 sq.
ft. of trench /bedroom
Not Permitted
60
mins per inch **
350 sq.
ft. of trench /bedroom
Not Permitted
over
60 mins
Not Permitted
Not Permitted
*
Subsurface absorption
fields with seepage beds are not permitted in
soils with percolation
rates over 30 minutes
per inch drop.
Two - compartment
tanks
or units in series are
required.
** Subsurface soil absorption systems are not permitted in soils with
percolation rates over 60 minutes per inch drop.
44
6) Where absorption systems are to be installed in
new fill material, the fill must be designed or
tested by a Registered Professional Engineer.
7) The final grade shall be such that surface
water drainage will be directed away from the
absorption system.
8) Seepage beds absorption areas shall be
calculated at 1.3 times the absorption area
required for absorption trenches.
9) Adjustment for Deep Gravel:
The length of an absorption trench or seepage
bed may be calculated by allowance for the
sidewall area of additional depth of gravel in
excess of 6 inches below the bottom of the
distribution pipe according to the following
formula:
Calculated Length Required W + 2
Length = Prior to X W + 1 + 2d
Adjustment
Where: W = width of field in feet
d = Depth of gravel below distribution
pipe in feet
10) The ground surface shall be graded to deflect
precipitation or other outside water from the
disposal area. The absorption area shall be
protected against erosion.
11) The perforaLed pipe in the drain field shall be
at least 6 inches below the outlet invert of
the septic tank.
12) If dosing is used in conjunction with an
absorption trench or seepage bed system, the
dosing chamber shall be sized to dose the field
3 -4 times per day. A reduction of 25% in the
field size may be allowed if dosing is
installed in conjunction with installation of
permanent water conserving appliances.
4.08.02 ABSORPTION TRENCH
1) At least 2 trenches of near equal length shall
be constructed with a length not exceeding 100
feet; a width not exceeding 3 feet; and a depth
not exceeding 3 feet (unless approved by the
Health Officer). A minimum 3 inch diameter
disposal line shall be provided for each trench
and shall be surrounded by clean, graded gravel
45
r
or rock, broken hard burned clay brick, or
similar aggregate. The material may range in
size from 1/2 inch to 2 -1/2 inches. Cinders,
broken shell, and similar material are not
recommended. The material shall extend from at
least 2 inches above the top of the pipe to at
least 6 inches below the bottom of the pipe.
The top of the gravel shall be covered with
untreated building paper, a thin 2 inch layer
of hay or straw, or similar pervious material
to prevent the gravel from becoming clogged by
earth backfill. An impervious covering shall
not be used, as this interferes with
evapotranspiration at the surface. A
distribution device providing uniform
distribution shall be included. The bottom of
the trench and the distribution lines shall be
level or graded to comply with (2) below.
2) Disposal lines composed of 12 inch length of 4
inch diameter agricultural drain tile, concrete
pipe or vitrified clay sewer pipe shall provide
joint openings between lengths of pipe of 1/8
to 1 \4 inch in width. Each open joint shall be
covered over the upper half of the joint
opening. Perforated plastic lines of a minimum
3 inch diameter shall be fitted with tight
joints and the perforations shall be so laid
that a relatively even distribution of effluent
over the system will occur. When, at the
discretion of the Health Officer, it is
necessary to maintain grade or alignment of the
tile or pipe lengths, all tile or pipe lengths
shall be placed on narrow grade boards which
are°secUrely'staked.` The grade of pipelines
shall be from zero (0) inches to 4 Inches per
100 feet.
3) A final cover of soil suitable for vegetation
at least 10 inches deep shall be placed from
the top of the hay, straw, or other similar
pervious material to the finished surface grade
of an absorption trench or seepage bed. The
final cover shall be graded to deflect runoff
water away from the disposal area. In the case
of an above - ground system, such as a mounded
system, an impervious berm shall be constructed
to prevent later flow of waste discharge
outside of the absorption field. Machine
tamping, rolling, or hydraulic compaction of
final cover shall not be permitted; however,
hand tamping may be allowed where necessary to
stabilize the soil to prevent erosion or the
intrusion of extraneous water.
46
4.08.03 SEEPAGE BEDS
1) Seepage beds shall be constructed with a length
not exceeding 100 feet; a width not greater
than 100 feet; and a depth not exceeding 3 feet
(unless approved by the Health Officer). A 12
inch layer of 1/2 inch to 2 -1/2 washed gravel
shall be distributed evenly over the entire
bed, with pipelines set at a depth to insure at
least 6 inches of gravel below and 2 inches of
gravel above each line. The bottom of the bed
shall be level. A covering of untreated
building paper, straw, or similar material,
shall be placed on top of the gravel, and after
final inspection, backfill shall be placed over
the bed to a minimum depth of 10 inches. The
bottom in the bed and distribution lines shall
be laid level.
2) The outermost disposal lines in the bed shall
be placed no less than 18 inches and no more
than 36 inches from its outside bedwalls. For
each 6 feet or part thereof, in bed width,
there shall be one disposal line extending the
length of the bed. Such lines shall be so
placed as to distribute the effluent evenly
over the entire bed area, and shall be level or
up to a 4 inch drop in 100 feet. A
distribution box or other distribution device
providing uniform application of flow shall be
included in the seepage bed system.
4.08.04 SEEPAGE PITS
1) Seepage pits are permitted as an alternative
only when absorption fields are impractical and
where the top 3 or 4 feet of soil is underlaid
with porous sand or fine gravel and the
subsurface conditions are otherwise suitable
for pit installation.
2) Where circumstances permit, seepage nits may be
either supplemental or alternative to the
shallow absorption fields. When seepage pits
are used in combination with absorption fields,
the absorption areas in each system shall be
pro - rated, or based upon the weighted average
of the results of the percolation tests. The
minimum absorption area shall be the equivalent
for a two bedroom dwelling. The capacity of
the seepage pit shall be computed on the basis
of percolation tests made in each vertical
stratum penetrated. The weighted average of
the results shall be computed to obtain a
47
design figure. Soil strata in which the
percolation rates are slower than 30 MPI shall
not be included in computing the absorption
area. The effective area of the seepage pit is
the vertical wall area (based on dug perimeter)
of the pervious strata below the inlet. No
allowance shall be made for impervious strata
or bottom area. Seepage pits shall be
separated by a distance equal to 3 times the
diameter of the largest pit. For pits over 20
feet in depth, the minimum space between pits
shall be 20 feet. Pits shall be provided with
both vertical sidewall and top supporting
structural concrete or other materials.of equal
structural integrity. Adequate safety
protection shall be provided to protect against
personal injury during construction or use.
3) When percolation rates are slower than 20 MPI,
dual seepage pits provided with a diversion
valve shall be required unless waived by the
Health Officer on submission of justifying
data.
4) The excavation of a Seepage pit shall
terminate at least 10 feet above the
groundwater table.
5) The walls shall be made of concrete block,
brick, perforated concrete rings or other
suitable masonry material. Mortar shall be
used in the horizontal joints only. A
removable cover or manhole shall be provided.
The annular space between the excavation and
the outside wall shall be filled with clean
coarse gravel. The bottom one (1) foot of the
pit should be filled with clean, coarse gravel.
4.08.05 SERIAL DISTRIBUTION SYSTEM
A serial distribution system may be used in all
situations where a soil absorption system is
permitted and shall be used where the ground slope
does not allow for suitable installation of a single
level absorption field, unless a distribution box or
dosing chamber is used. The horizontal distance from
the side of the absorption system to the surface of
the ground shall be adequate to prevent lateral flow
and eruption of effluent above ground. When a serial
distribution system is used, the following design and
construction procedures shall be followed:
1) The bottom of each absorption field and its
distribution line shall be level.
M.'
2)
There shall be a minimum of 10 inches of ground
cover over the gravel fill.
3)
An absorption field shall follow approximately
the ground surface contours so that variation
in absorption field depth will be minimized.
4)
There shall be a minimum of 6 feet (horizontal
measurement) of undisturbed earth between
adjacent absorption field trenches and between
the septic tank or other treatment unit and the
nearest absorption field.
4.08.06 EVAPOTRANSPIRATION DISPOSAL OF EFFLUENT
An
evapotranspiration system may be used exclusively
or
in combination with a soil absorption system.
1)
An evapotranspiration system shall be designed
by a Registered Professional Engineer who shall
furnish design data for a complete review of
the design.
2)
Data to be furnished shall include, but shall
not be limited to: liner material and bedding,
properties of the soil in the
evapotranspiration bed, and provision for
vegetation cover.
3)
When high groundwater table, bedrock, fractured
rock, or highly pervious material (percolation
faster than 5 MPI) endangers the underground
water, a durable and impermeable liner shall be
installed in the bed to prevent the sewage
effluent from entering the underlying formation
or groundwater table.
4) An evapotranspiration system shall be located
in an area where there is exposure to sunshine.
5) The system bed shall be crowned and covered
with a minimum of 4 inches of selected backfill
material and with a vegetation cover.
6) Bed area shall be protected to prevent damage
from vehicular or pedestrian travel. The
ground surface shall be graded to deflect
precipitation and other outside water away from
the disposal area.
7) The following formula may be used as a minimum
guide for determining the area necessary for
total evapotranspiration of septic tank
effluent:
M
t/
Flow (in gallons /day X 237
Area ( in s.f.) = 3211Y .= Lake Evaporation
rate in Eagle County
8) If sand is used in an evapotranspiration system
it shall have an effective size between 0.25
mm. and 1.0 mm. The uniformity coefficient
shall be 4.0 or less or as specified by the
design engineer.
NOTE: Except for dwellings, if the system is
designed for summer use only, as determined by the
Environmental Health Department, multiply the above
area b_v 0.6 to obtain the required area.
4.08.07 SAND FILTER
1) The filtering material shall be clean, coarse
sand, all passing a screen having four (4)
meshes to the inch. The sand shall have an
effective size between 0.25 and 0.6 mm. The
uniformity coefficient shall be 4.0 or less.
2) The sand shall be at least 2 feet deep. The
distributors and underdrain, if required by the
Eagle County Board of Health, shall be
surrounded by coarse screened gravel or crushed
stone. All of the gravel or stone shall pass a
2 -1/2 inch screen and shall be retained on a
3/4 inch screen. Fine gravel 1/4 inch size or
less may be used above and around the coarse
material, both at the distributor and
underdrains. The separating distance between
parallel, distribution lines .shall - not - exceed 6
feet , and a distribution line shall be located
within 3 feet of each filter sidewall. Pipe
for gravity distribution shall be no less than
4 inches in diameter. The slope of the
distributors shall be 0.4 percent where dosing
tanks are not used, and the slope of the
underdrains 0.5 to 1.0 percent. It is required
that the sand be thoroughly settled by flooding
or other means before the distributors are
placed at the final grade. The distributor and
underdrains may be of agricultural tile, or
bell and spigot pipe, or perforated pipe. The
top of the sand bed shall be no less than 4
feet above the high groundwater table for
installations in which effluent percolates
downward through the soil.
3) The minimum area for a sand filter shall be
computed as a function of the maximum daily
sewage flow according to the following table:
50
@:
4.09
4.09.01
..9
l
LOADING RATES FOR A SAND FILTER
Application Rate
Type of Service Gallons per S.F. /Day
Without garbage grinder 1.15
With garbage grinder 0.95
4) A dosing tank shall be provided where the total
filter area exceeds 1,800 Sq. Ft. The size of
the dose, or the net capacity of the dosing
tank, shall be at least 75 percent of the
volume of the distributors.
WASTEWATER POND
1) A wastewater pond shall be discouraged;
however, may be permitted only upon application
to and approval of the Eagle County Board of
Health and may be used to provide an additional
degree of treatment. The pond shall be
designed for a loading not to exceed 0.46 lbs.
of BOD per 1,000 sq. ft. of water surface
area. 5Special design shall be required in each
case in which non- domestic kinds of individual
sewage disposal system wastes will be received.
2) Maximum water depth in the pond shall not
exceed 3 feet. The inside slope of the pond,
dike, or embankment shall not be steeper than
3:1 (3 feet measured horizontally for each foot
measured vertically). A center inlet shall be
provided.
Unless constructed in impervious - soil, - the`pond
shall be sealed to prevent excess seepage of
wastewater.
4) Adequate safety protection shall be provided,
such as fencing, to protect against personal
injury.
5) Surface runoff shall be diverted away from the
pond except where controlled by design.
DESIGN CRITERIA (OTHER FACILITIES)
MINI- SYSTEM
A mini - system shall meet at least all minimum design
and construction standards for a septic tank system
based on the amount and character of wastes for the
fixtures and the number of persons to be served.
51
4.09.02 VAULT
A vault shall have a minimum 1,000 gallon effective
capacity and may be permitted under limited use
occupancy for water carriage sewage systems on
property which cannot accommodate a sewage treatment
system. A signal device shall be installed to
indicate when pumping is necessary. Vaults shall
meet the same installation and construction standards
as apply to septic tanks except that no effluent
outlet shall be provided.
4.09.03 VAULT PRIVY
A vault privy shall be built to include:
1) Fly -tight construction;
2) A superstructure affording complete privacy;
3) An earth mound around the top of the vault and
below floor level which slopes downward away
from the superstructure base;
4) A floor and riser of concrete or other
impervious material; and
5) Seats and covers of easily cleanable,
impervious material, hinged, self - closing and
fly- proof.
All venting shall be fly- proofed with No. 16 or
tighter mesh screening. Effective capacity of the
vault shall be no less than 400 gallons.
4.09.04 PIT PRIVY
A new pit privy constructed in soil may be permitted
only:
1) Upon approval of the Eagle County Board of
Health, and
2) For temporary or emergency basis not to exceed
14 days use.
It shall be built to include fly -tight construction;
a superstructure affording complete privacy; an earth
mound around the top of the compartment and below the
floor level, which slopes downward away from the
superstructure base; a floor and riser of concrete
for other impervious material; and with seats and
covers of easily cleanable, impervious material,
hinged, self- closing and fly- proof. All venting
shall be fly- proofed with No. 16 or tighter mesh
52
screening. Effective capacity of the pit shall be no
less than 400 gallons. Pit shall be located in soil
where the maximum seasonal level of the groundwater
table will be no closer than four (4) feet below the
bottom of the pit.
4.09.05 INCINERATION AND CHEMICAL TOILETS
An incineration toilet, which may be used in
connection with a mini - system by permit from the
Eagle County Board of Health, shall be designed and
installed in accordance with all applicable federal,
state, and local air - pollution requirements. A
portable chemical toilet, which may be used by permit
from the Eagle County Board of Health, shall have a
superstructure which meets the requirements of the
paragraph 4.09.03 titled "Vault Privy." Use of a
portable chemical toilet in permanently occupied
buildings shall be prohibited except during
construction or under emergency circumstances as
determined by the Environmental Health Department.
4.09.06 SLIT TRENCH
A slit trench shall be approved for temporary or
emergency use as determined by the Eagle County Board
of Health and shall be located in suitable soil and
shall be excavated approximately one (1) foot wide
and two (2) feet deep for the required length.
Excrement shall be covered with at least two (2)
inches of soil at least once a day or more frequently
if requested by the Eagle County Board of Health or
its designated agent. A superstructure of a
temporary nature shall be provided to afford
privacy. A slit trench shall be considered a
temporary convenience to be used no longer than 7
days, and shall be backfilled with at least 1 foot of
soil with additional allowance for settling to grade
when use has been discontinued.
4.09.07 BUSINESS, COMMERCIAL, INDUSTRIAL, INSTITUTIONAL, OR
MULTI - FAMILY DWELLING WASTE SYSTEMS
1) Performance criteria and construction standards
for a system which will service business,
commercial, institutional, industrial property,
or multi - family dwellings shall conform to
these Regulations.
2) Such systems shall be designed by a Registered
Professional Engineer. An application for such
a system shall be reviewed by the Eagle County
Board of Health unless disposal is through an
absorption system and the wastes are
53
}
Y
exclusively domestic type wastes, in which case
review shall be by the Environmental Health
Department if authorized by regulations of the
Eagle County Board of Health for such systems.
4.09.08 SYSTEMS WITH LIMITED OR UNDETERMINED DATA
Systems for Which Data on Design, Operation, and
Maintenance, based on use in Colorado, is Limited or
Undetermined:
_) Composting Toilets
a) Deposits of feces, urine, and readily
decomposable household garbage that are
not diluted with water or other fluids
may be retained in a compartment, in
which aerobic composting will occur. The
compartment may be located (a) so as not
to cause nuisance problems and /or odors;
(b) where it is readily accessible for
operation and maintenance; (c) within a
dwelling or building provided the unit
complies with the applicable requirements
of these Regulations, and provided the
installation will not result in
conditions considered to be a health
hazard. The effective volume of the
receptacle must be sufficient to
accommodate the number of persons served.
b) Adequate additional volume shall be
provided for the use of composting
materials which shall not be toxic,_to. the
process or - hazardous -to persons and which
shall be used in sufficient quantity to
assure proper decomposition.
C) compartment and appurtenances related to
the unit shall include fly -tight
construction and exterior mechanical or
gravity ventilation as required by the
Uniform Building Code.
d) When the available effective volume is
filled to 75 percent of capacity, residue
from the unit shall be properly disposed
of by acceptable solid waste practices.
e) No composting toilet may be installed to
serve more than 8 persons per system.
f) If a system will be installed where low
temperature may be a factor, design shall
.compensate for the effects of the low
temperature.
54
2)
3)
g) Manufactured composting toilets shall
bear the seal of approval of the National
Sanitation Foundation, or an equivalent
testing program, and is otherwise
approved by the Department.
Systems Which Recycle Treated Wastewater for
Non - potable Purposes such as Flushing Water
Closets or Urinals:
a) That portion of the wastewater recycled
for non - potable purposes such as flushing
water closets or urinals must meet the
treatment requirements of paragraph
4.10.03 of these Regulations for effluent
in which the possibility exists for
occasional direct human contact.
b) No cross - connection to a pipe, fixture,
or supply containing potable water shall
be permitted.
Systems Which Recycle Treated Wastewater for
Potable Purposes:
a) No system shall be permitted which will
recycle wastewater for potable purposes
except a system which shall consistently
meet all of the sanitation and maximum
contaminant level requirements of rules,
regulations, and standards of the
Colorado Department of Health and of the
Eagle County Board of Health.
b) The recycling systems are experimental,
and as such, require a backup feasibility
plan for alternate water and sewage
disposal in the event of failure of the
recycling system.
4.10 TREATMENT SYSTEMS OTHER THAN THOSE DISCHARGING
THROUGH A SOIL ABSORPTION OR SAND FILTER SYSTEM AND
NON- DISCHARGING SYSTEMS
4.10.01 GENERAL
Those systems which will discharge effluent directly
to the atmosphere, the ground surface or below
ground, or which employ aerobic principles of sewage
treatment of a dispersal system, may be permitted
only if designed by a Registered Professional
Engineer. This Section 4.10 shall not apply to
systems discharging below ground through a soil
absorption system nor sand filter system nor to a
non - discharging system.
55
4.10.02 REVIEW OF APPLICATION
The Eagle county Board of Health shall review all
applications for such systems which may result in
discharge or drainage of effluent from the property
of origin. No permit shall be issued for such a
system if the Eagle County Board of Health determines
that a potential health hazard or private or public
nuisance or undue risk of contamination exists. The
Eagle county Board of Health may, by regulation,
authorize the Environmental Health Department to
review applications and issue permits for systems
which do not permit the drainage of effluent off the
property of origin. For systems discharging to State
waters, see Section 4.12.
4.10.03 MINIMUM PERFORMANCE CRITERIA REQUIRED
1) I£ effluent discharge is made into the
atmosphere or upon the ground surface in areas
in which the possibility exists for occasional
direct human contact with the effluent
discharge, the effluent at the point of
sampling shall consistently meet each of the
following standards: '
a) The fecal coliform density shall not
exceed 2 per 100 milliliters (2/100 ml).
b) The standard BOD5 shall not exceed 20
milligrams per liter (20 mg /1).
C) The total suspended matter shall not
exceed 40 milligrams per liter. (40 .mg /1)..
2) If effluent discharge is made into the
atmosphere or upon the ground surface in an
area so restricted as to protect against the
likelihood of direct human contact with the
discharged effluent, the effluent at the point
of sampling shall consistently meet each of the
following standards:
a) The fecal coliform density shall not
exceed 500 per 100 milliliters (500/100
ml).
b) The standard BOD5 shall not exceed 20
milligrams per liter (20 mg /1).
C) The total suspended matter shall not
exceed 40 milligrams per liter (40 mg /1).
92
l
3) If effluent discharge is made beneath the
surface of the ground and discharge will not be
made through suitable soil, either existing or
constructed, or through a sand filter, the
following standards shall be met:
a) There shall be at least 4 feet of soil
between the maximum seasonal high water
table and the level of effluent
discharge.
b) The standard BOD5 shall not exceed 60
milligrams per liter (60 mg /1).
c) The total suspended matter shall not
exceed 100 milligrams per liter (100
mg /1).
4.10.04 METHODS OF ANALYSIS - SAMPLING POINTS
All effluent samples shall be analyzed according to
methods prescribed in the most recent edition of
"Standard Methods for the Examination of Water and
Wastewater" (American Public Health Association).
The point of sampling shall "be a location that is
representative of final discharge from the system.
4.10.05 DISINFECTION OF EFFLUENT (WHEN REQUIRED)
1) Disinfection shall be introduced into the
effluent.
2) A contact basin shall be provided for
disinfection of effluent which meets the
following requirements:
a) A minimum of 60 minutes detention time;
b) A free residual chlorine (or equivalent)
of 1.0 ppm tested at the exit of the
effluent pipe of the basin;
C) Thorough mechanical mixing or basin
having a length to width ratio of 40:1,
with a sharp crested weir spanning the
entire width of the basin outlet. Other
designs shall be approved when proof of
their effectiveness is submitted for an
acceptable design.
57
4.11 MANUFACTURED UNITS UTILIZING MECHANICAL APPARATUS FOR
TREATMENT OF SEWAGE
4.11.01 GENERAL
Individual sewage disposal systems utilizing
mechanical apparatus and furnished for installation
in Eagle County shall comply with the minimum
requirements of criteria and construction standards
set forth in these Regulations.
4.11.02 CONDITIONS FOR USE
No such unit utilizing mechanical apparatus and which
is designed for discharge either upon the ground or
beneath the ground surface or which may adversely
affect Eagle County waters shall be permitted unless
(1) the system is installed within a geographic area
wherein a public, quasi - public, or private entity, or
political subdivision is continually responsible for
the efficient operation and maintenance of said unit,
or (2) the operator of the system insures an
efficient operation of all mechanical and electrical
component parts provided prior to and during
continuing use.
4.11.03 APPROVAL OR CERTIFICATION
No manufactured units , utilizing mechanical
apparatus shall be permitted in Eagle County unless
the Colorado Department of Health has certified the
treatment system based upon its approval of
independently certified laboratory results furnished
by the manufacturer, provided however, the Department
shall take into consideration any other test
information available to the Department concerning
the reliability and performance of the system. The
Department shall certify any unit for subsurface
discharge which bears the National Sanitation
Foundation Standard 40 Certification ** or equivalent
testing program, and is otherwise approved by the
Department. When the Department shall be satisfied
and has issued its certification, the Eagle County
Board of Health shall be entitled to rely thereon.
The issuance of any such certificate shall not
relieve the holder thereof or the user of the unit
from the responsibility of complying with these
Regulations and the applicable rules and regulations
adopted pursuant to law.
** A copy of the NSF Standard No. 40 is available at local
libraries or can be inspected in the offices of the
Colorado Water Quality control Division, Colorado
Department of Health, 4210 East 11th Avenue, Denver, during
working hours.
4.12 EFFLUENT DISCHARGED TO STATE WATERS
Any system which will dispose of effluent by
discharging into State waters shall be designed by a
Registered Professional Engineer and the application
shall be submitted for preliminary approval to the
Eagle County Board of Health. Once approved, the
application shall be forwarded to the Division for
issuance of a permit in compliance with all
applicable regulations of the Water Quality control
Commission. Compliance with such a permit shall be
deemed full compliance with all individual sewage
disposal system regulations.
4.13 WATER QUALITY CONTROL COMMISSION REGULATIONS
All systems in areas designated by the Water Quality
Control Commission pursuant to C.R.S. 1973, 25 -8 -206
must comply with all regulations promulgated by the
Commission for those areas. Applications for such
systems must be submitted to the Water Quality
Control Division for permit issuance pursuant to
C.R.S. 1973, 25 -8 -504. Compliance with such a permit
shall be deemed full compliance with all individual
sewage disposal system regulations.
4.14 INSTALLATION
4.14.01 GENERAL
Treatment units .,shall .be set on a - firm -and level base
except as- otherwise °provided in these Regulations and
shall be capable of accommodating flow with hydraulic
efficiency.
4.14.02 MECHANICAL COMPONENTS
1) Ventilation and Air System
Mechanical components shall be installed in a
properly vented location and all vents, air
intakes, and air hoses shall be protected from
snow, ice, or water vapor accumulations.
2) Components Installation
Mechanical components installed in or at the
unit must be protected against damage or
impairment of their efficiency by flooding,
foaming, or surcharging.
59
}
4.14.03 COVERS, BARRIERS, OR OTHER PROTECTION
All systems must be installed to include protection
of openings against entrance of insects and rodents.
Barriers shall be provided to prevent entrance by
unauthorized persons.
4.15 OPERATION AND MAINTENANCE
4.15.01 RESPONSIBILITY
The owner and the party in possession of real
property upon which an individual sewage disposal
system is used, shall be jointly and severally
responsible for operation and maintenance of the
system unless jurisdiction for responsibility has
been transferred to a public, quasi - public, or
political subdivision. The person denying such
responsibility shall bear the burden of proof for
such denial upon establishment of ownership or
possessory rights on the property served by the
system.
4.15.02 SERVICE LABEL
For treatment plants utilizing mechanical apparatus
or under a service policy, a clearly visible,
permanently attached label or plate giving
instructions for obtaining service shall be placed at
a conspicuous location.
4.15.03 MAINTENANCE AND CLEANING
1) When directed by the Environmental Health
Department, for the purpose of obtaining
compliance with rules and regulations, the
owner or user of a system shall provide for
maintenance and cleaning of an individual
sewage disposal system and shall notify the
Environmental Health Department upon completion
of any maintenance work and report to said
department and submit such evidence of
compliance with any maintenance and cleaning
schedule in the form and as said department
requires.
2) The Eagle County Board of Health may adopt
rules and regulations for the scheduling of
maintenance and cleaning systems and practices
adequate to insure proper functioning of
acceptable systems, and may require proof of
proper maintenance and cleaning, pursuant to
any such schedules and practices, to be
submitted periodically to the local department
of health by the owner of the system.
60
4.15.04 MONITORING AND SAMPLING
1) Reasonable periodic collection and testing by
the Environmental Health Department of effluent
samples from individual sewage disposal systems
for which monitoring of effluent is necessary
in order to insure compliance with the
provisions of rules and regulations may be
performed not more than two (2) times per year
except when required by the Health Officer in
conjunction with an enforcement action.
2; Any owner or occupant of property on which an
individual sewage disposal system is located
may request the Environmental Health Department
to collect and test an effluent sample from the
system. The Environmental Health Department
may perform such collection and testing
services.
3) A fee of $25.00 plus actual laboratory charges
and 20 cents for each mile traveled from the
principal office of the Environmental Health
Department to the site of the system and
return, shall be charged for each sample
collected and tested, and payment of such
charge may be stated in the permit as a
condition for its continued use.
4.15.05 DISPOSAL OF WASTE MATERIALS
Disposal of waste materials removed from a system in
the process of maintenance or cleaning shall be
disposed of at an approved sewage treatment plant or
the Eagle _County Landfill, - Approval must be granted
by the Environmental Health Office prior to disposal
at the Eagle County Landfill.
4.15.06 COMPLIANCE
No discharge is permitted which does not comply with
the rules and regulations: No sewage or effluent
shall be permitted to be discharged into or upon the
surface of the ground or into State waters unless the
sewage system and effluent meets the minimum
requirements of applicable rules and regulations.
61
4.15.07 TERMINATION OF USE OF SYSTEM
The contents of a septic tank, vault, or
seepage pit, the use of which has been
terminated, shall be properly disposed of as
required in Section '4.15.05 whereupon the
emptied tank, vault, or pit shall be filled
with rock or soil.
62
I
0
A P P E N D I C E S
APPENDIX A - Statement of Basis and Purposes
APPENDIX B - Soil Classification systems
(Soil - Seperaqte Size Limits)
APPENDIX C - Guide for Textural Classification
APPENDIX D - Guide for Soil Compaction
63
APPENDIX A
STATEMENT OF BASIS AND PURPOSES
The guidelines regulating the Individual Sewage Disposal
Regulations were mandated by law, Article 10, Section
25 -10- 104(1), Title 25. The present amended guidelines were
adopted by the State Board of Health in 1974.
As more experience was gained in the field, there was a
preponderance of questions directed to this Division for
clarification. Based on the discussions held with the local
boards of health, the General Services Section of this Division
held a limited investigation into the various causes of
individual sewage disposal system failures in the State, in the
summer of 1977.
The Attorney General's Office had advised this Division of the
need to amend the guidelines applicable to the local boards of
health and all local jurisdictions in the State. Our experience
has shown that some of the local jurisdictions did not adopt
their own regulations as required by Section 25 -10- 104(2). This
made the monitoring and enforcement difficult for this
Division. Because of such situations, the new guidelines were
updated to include provision where the guidelines will
automatically become effective for any local board of health or
jurisdiction that failed to adopt its own regulations within a
year.
The advent in alternatives to sewage disposal has made it
imperative that this Department address the new technology._ and
its application.
Based on the above issues, at the request of the Department, a
committee was appointed and charged with the responsibility of
revising the guidelines. The main objective was to maintain
uniformity of the standards within the State and also allow for
imposing more stringent standards by the local boards of health
wishing to do so based on environmental constraints endemic to
their areas of jurisdiction.
The purpose of these guidelines by the local and county boards
of health is to provide guidance as authorized by law, Sec.
25 -10- 105(2). The guidelines shall become effective as
regulations in any local health departments not adopting their
own regulations in any local health departments not adopting
their own regulations within a year.
The objectives of the proposed regulation are to provide
guidance and establish minimum standards for the location,
construction, performance, installation, alteration, and use of
individual sewage disposal systems within the State of Colorado.
64
j
APPENDIX A
STATEMENT OF BASIS AND PURPOSES
The guidelines regulating the Individual Sewage Disposal
Regulations were mandated by law, Article 10, Section
25 -10- 104(1), Title 25. The present amended guidelines were
adopted by the State Board of Health in 1974.
As more experience was gained in the field, there was a
preponderance of questions directed to this Division for
clarification. Based on the discussions held with the local
boards of health, the General Services Section of this Division
held a limited investigation into the various causes of
individual sewage disposal system failures in the State, in the
summer of 1977.
The Attorney General's Office had advised this Division of the
need to amend the guidelines applicable to the local boards of
health and all local jurisdictions in the State. Our experience
has shown that some of the local jurisdictions did not adopt
their own regulations as required by Section 25 -10- 104(2). This
made the monitoring and enforcement difficult for this
Division. Because of such situations, the new guidelines were
updated to include provision where the guidelines will
automatically become effective for any local board of health or
jurisdiction that failed to adopt its own regulations within a
year.
The advent in alternatives to sewage disposal has made it
imperative that this Department address the new technology._ and
its application.
Based on the above issues, at the request of the Department, a
committee was appointed and charged with the responsibility of
revising the guidelines. The main objective was to maintain
uniformity of the standards within the State and also allow for
imposing more stringent standards by the local boards of health
wishing to do so based on environmental constraints endemic to
their areas of jurisdiction.
The purpose of these guidelines by the local and county boards
of health is to provide guidance as authorized by law, Sec.
25 -10- 105(2). The guidelines shall become effective as
regulations in any local health departments not adopting their
own regulations in any local health departments not adopting
their own regulations within a year.
The objectives of the proposed regulation are to provide
guidance and establish minimum standards for the location,
construction, performance, installation, alteration, and use of
individual sewage disposal systems within the State of Colorado.
64
This guideline and /or regulation shall apply to individual
sewage disposal systems with a design capacity of 2,000 gallons
or less per day which will not discharge into State waters.
In preparing the guideline, the Department used information
available from scientific and technical journals, design manuals
established by the Environmental Protection Agency, research and
scientific reports from the National Science Foundation, the
U.S. Department of Health, Education and welfare, and other
sources referred to directly in the appendices.
The statements contained herein are intended to comply to
Section 24 -4 -103 (as amended) C.R.S. 1973, as prescribed by the
Statute.
These regulations establish basic standards for regulating the
Individual Sewage Disposal Systems within the State of
Colorado. These regulations are intended to comply with the
legislative intent as stated in Title 25, Article 10, C.R.S.
1973, Sec. 25 -10 -102.
65
' APPENDIX B b}
^n
Source:
Virginia Erosion and Sediment Control Handbook.
SOIL CLASSIFICIATION SYSTEMS
SOIL - SEPARATE SIZE LIMITS
UNIFIED CAA USDA AASHO ASTM
H
z
W
H
N
ttl
Colloids*
H
z
3
H
0.001 --
N
Clav
H
u
to
H
[d
ca
m
Source:
Virginia Erosion and Sediment Control Handbook.
SOIL CLASSIFICIATION SYSTEMS
SOIL - SEPARATE SIZE LIMITS
UNIFIED CAA USDA AASHO ASTM
iltt: uucu iii play iiauuz un rn zest reports
66
Colloids*
Colloids*
0.001 --
Clav
m
m
Clay
m
0.002 -
i
Clay
Clay
-i
Fines
t) o
-
o
z
0.005;-!
(Silt
I H
_J
Silt
c
0.01 �-
or
Clay)
( Silt
Silt
Silt
v
Lq
0.02 -�
n
0.03 I -
Ij
0.04
0.05 -
i
=i
Very Fine
1
200
' (0 074)
-�
0.1 -
Fine
Sand
'140 (0 105)
1
Fine
Sand
Fine
100 (0 149)
_,
Sand
Fine Sand
Fine Sand
0.3 J I
Sand
I
98 f8 397)
Medium
°0.4 1-
Sand
40 (0- 42)
0.5 -
CoarseI
Medium
Coarse
Coarse
Coarse
I
30 0 )
1.0 ; -
Sand
Sand i
)
20 (0 84
+
Very Coarse
Sand
Sand
Sand
16 (1 19)
2.0
Sana
•`-
10
(2 0)
3.0 i _
Coarse
8
(2 38)
4.0 �-
Sand
Fine
Fine
5.0
4
(4 76)
Gravel
Gravel
Fine (
10 '-
Gravel 1
3/8"
(9 525)
Medium
1/2"
(12 7)
20 �-
Coarse
Gravel
3/4"
(19 05)
30 �-
Coarse Gravel
Gravel
1"
(25 4)
44 -
Gravel !
Gravel
Coarse
(38 1)
Gravel
2"
(50 8)
-
3"
(76 2)
100 -
Cobbles I
Cobbles
6"
(152 4)
200 -
Boulders
300 -
12"
(304 8);
400 -
iltt: uucu iii play iiauuz un rn zest reports
66
i
APPENDIX C
a
PROPORTIONS Or SAND, SILT, 4..110 CLAY iit
THE gAciC SOIL — TEXTURAL CLASSES
GO
O
SG —
\ / h
eG `
i0
\ CLAY .
G t jrr
/ \•\ \SILT T/ \�
4 o /sAuy
S.•.es.,;__ _ % \ co
�Il �LMY • \
30— / \i ,? _ a• /C:AY / SILiT CLAY O
i LGA:1
\ SAH]Y CLAY / `� i —i a ._ l0 A! . \\
�' \• i : \ i \\ O
10 t ._
Lo i0 � ' �•sz�,or LGAq 'N , *'\ � � `, stir LGZ;
\
„S
to a 5'x10 �, \.... \ , \ ` \SIl1'
N l
PEAC E[Ii SAHO
U S CLAM 9 A,R0 SIEVE xifua E]S
i0 10 , }0 ��0 --30 100
ize � i �� srlr cur
Cl114 Slb[ .. +m
Source: EPA Design Flanual or Land Tr- cacmenE or !unici-al '.'asle;:atzr
67
APPENDIX D
. s
' Guide For Soil Compacticrr, ;
The percent r
Z
,.scent o. relative Compaction required will be equail,
to or greater than minimum values as shown in the `ollo.,-
ing table for the various classes of soil and type of
Umpaction. \
l
�l
AASHTO AASHTO \�
Soil Classification T99 T180
(AASHTO M145) Minimum Minimum
Relative Relative
Compaction Compaction
(S) WI
A -1
100
95
A -3
100
95
A -2 -4
100
95
A -2 -5
10'0
95
All others
95
90
NOTES:
1. AASHTO: American Association of State Highway Transportation
Officials.
2. AASHTO - T99: Standard Test Procedure - 5.5 lb. Rammer
3. AASHTO - TISO: Standard Test Procedure - 10 lb. Rammer
4. Source of information: Soils Nanual M. S.10 - The Asphalt
Institute
m
-� _
3
.,