Agricultural irrigation
means irrigation of crops produced for direct human consumption,
crops where lactating dairy animals forage, and trees that produce
nuts or fruit intended for human consumption. This definition includes
household gardens, fruit trees, and industrial hemp as defined by
C.R.S.
35-61-101.
Agronomic rate
means the rate of application of nutrients to plants that
is necessary to satisfy the nutritional requirements of the plants.
City
means the City of Grand Junction, a Colorado home rule municipality.
Closed sewerage system
means either a permitted domestic wastewater treatment works,
which includes a permitted and properly functioning on-site wastewater
treatment system (OWTS) with a design capacity more than 2,000 gpd,
or a properly functioning and approved or permitted OWTS with a design
capacity of 2,000 gpd or less.
Commission
means the Water Quality Control Commission 25-8-201, C.R.S.
Component
means a subpart of a graywater treatment works which may
include multiple devices.
Cross-connection
means any connection that could allow any water, fluid, or
gas such that the water quality could present an unacceptable health
and/or safety risk to the public, to flow from any pipe, plumbing
fixture, or a customer’s water system into a public water system’s
distribution system or any other part of the public water system through
backflow.
Design
means the process of selecting and documenting in writing
the size, calculations, site specific data, location, equipment specification
and configuration of treatment components that match site characteristics
and facility use.
Design flow
means the estimated volume of graywater per unit of time
for which a component or graywater treatment works is designed.
Division
means the Water Quality Control Division of the Colorado
Department of Public Health and Environment.
Facility
means any building, structure, or installation, or any combination
thereof that uses graywater subject to a graywater control program
(program), is located on one or more contiguous or adjacent properties,
and is owned or operated by the same person or legal entity. Facility
is synonymous with the term operation.
Floodplain (100-year)
means an area adjacent to a river or other watercourse which
is subject to flooding as the result of the occurrence of a 100-year
flood, and is so adverse to past, current or foreseeable construction
or land use as to constitute a significant hazard to public or environmental
health and safety or to property or is designated by the Federal Emergency
Management Agency (FEMA) or National Flood Insurance Program (NFIP).
In the absence of FEMA/NFIP maps, a professional engineer shall certify
the floodplain elevations.
Floodway
means the channel of a river or other watercourse and the
adjacent land areas that must be reserved to discharge the base flood
without cumulatively increasing the water surface elevation more than
one foot or as designated by the Federal Emergency Management Agency
or National Flood Insurance Program. In the absence of FEMA/NFIP maps,
a professional engineer shall certify the floodway elevation and location.
Graywater
means that portion of wastewater that, before being treated
or combined with other wastewater, is collected from fixtures within
residential, commercial, or industrial buildings or institutional
facilities for the purpose of being put to beneficial uses. Sources
of graywater are limited to discharges from bathroom and laundry room
sinks, bathtubs, showers, and laundry machines. Graywater does not
include the wastewater from toilets, urinals, kitchen sinks, dishwashers,
or nonlaundry utility sinks. C.R.S.
25-8-103(8.3)(a)
Graywater control program (program)
is this chapter and, as applicable, any rule(s), including
implementation practices, regulation(s), standard(s) authorized by
the City, and which follows the minimum requirements of this chapter
and other applicable law(s), rule(s) and regulation(s).
Graywater treatment works
means an arrangement of devices and structures used to: (1)
collect graywater from within a building or a facility; and (2) treat,
neutralize, or stabilize graywater within the same building or facility
to the level necessary for its authorized uses. C.R.S.
25-8-103(8.4)
Indirect connection
means a waste pipe from a graywater treatment works that
does not connect directly with the closed sewerage system, but that
discharges into the closed sewerage system though an air break or
air gap into a trap, fixture, receptor, or interceptor.
Irrigation area
means that area of ground consisting of soil, mulch, gravel,
and plant material to which water is directly applied by a graywater
subsurface irrigation system.
Legally Responsible Party.
(1)
For a residential property, the legally responsible party is
the property owner.
(2)
For a corporation, the legally responsible party is a responsible
corporate officer, either:
(i)
A president, secretary, treasurer, or vice-president of the
corporation in charge of a principal business function, or any other
person who performs similar policy- or decision-making functions for
the corporation; or
(ii)
The manager of operating facilities, provided, the manager is
authorized to make management decisions which govern the operation
of the regulated facility including having the explicit or implicit
duty of making major capital investment recommendations, and initiating
and directing other comprehensive measures to assure long term environmental
compliance with environmental laws and regulations; the manager can
ensure that the necessary systems are established or actions taken
to gather complete and accurate information for approval application
requirements; and where authority to sign documents has been assigned
or delegated to the manager in accordance with corporate procedures.
(3)
For a general or limited partnership or sole proprietorship,
the legally responsible party is the general partner, business matters
partner or the proprietor, respectively.
(4)
For a limited liability company, the responsible party shall
be the manager or other authorized agent of the company and shall
be a natural person.
(5)
For a municipality, State, federal, or other public agency,
the legally responsible party is a principal executive officer or
ranking elected official, either:
(i)
The chief executive officer of the agency; or
(ii)
A senior executive officer having responsibility for the overall
operations of a principal geographic unit of the agency (e.g., regional
administrators of EPA); or
(iii)
When the entity is the State of Colorado, the Commission.
Modification
means the alteration or replacement of any component of a
graywater treatment works that can affect the quality of the finished
water, the rated capacity of a graywater treatment works, the graywater
use, alters the treatment process of a graywater treatment works,
or compliance with this regulation and the local graywater control
program. This definition does not include normal operations and maintenance
of a graywater treatment works.
Mulch
means organic material including but not limited to leaves,
prunings, straw, pulled weeds, and wood chips.
Mulch basin
means a type of irrigation or treatment field filled with
mulch or other approved permeable material of sufficient depth, length,
and width to prevent ponding or runoff. A mulch basin may include
a basin around a tree, a trough along a row of plants, or other shapes
necessary for irrigation.
Nuisance
means the unreasonable, unwarranted and/or unlawful use of
property, which causes inconvenience or damage to others, including
to an individual or to the general public.
On-site wastewater treatment system (OWTS)
means an absorption system of any size or flow or a system
or facility for treating, neutralizing, stabilizing, or dispersing
sewage generated in the vicinity, which system is not a part of or
connected to a sewage treatment works. C.R.S.
25-10-103(12)
Percolation test
means a subsurface soil test at the depth of a proposed irrigation
area 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. The rate is expressed in minutes per inch.
Potable water system
means a system for the provision of water to the public for
human consumption through pipes or other constructed conveyances,
where such system has less than 15 service connections or regularly
serves less than an average of at least 25 people daily at least 60
days per year.
Public water system
means a system for the provision of water to the public for
human consumption through pipes or other constructed conveyances if
such system has at least 15 service connections or regularly serves
an average of at least 25 individuals daily at least 60 days per year.
A public water system is either a community water system or a noncommunity
water system. Such term does not include any special irrigation district.
Such term includes:
(1)
Any collection, treatment, storage, and distribution facilities
under control of the supplier of such system and used primarily in
connection with such system.
(2)
Any collection or pretreatment storage facilities not under
such control, which are used primarily in connection with such system.
Regulation No. 86
means Colorado Department of Public Health and Environment
Water Quality Control Commission Regulation No. 86 – Graywater
Control Regulation, 5 CCR 1002-86.
Single-family
means a detached or attached structure, arranged and designed
as a single-family residential unit intended to be occupied by not
more than one family and that has separate water and sewer services
connections from other dwelling units.
Site evaluation
means a comprehensive analysis of soil and site conditions
for a graywater irrigation area.
Soil horizon
means layers in the soil column differentiated by changes
in texture, color, redoximorphic features, bedrock, structure, consistence,
and any other characteristic that affects water movement.
Soil profile test pit
means a trench or other excavation used for access to evaluate
the soil horizons for properties influencing effluent movement, bedrock,
evidence of seasonal high ground water, and other information to be
used in locating and designing a graywater irrigation area.
Soil structure
means the naturally occurring combination or arrangement
of primary soil particles into secondary units or peds; secondary
units are characterized because of shape, size class, and grade (degree
of distinctness).
State
means the State of Colorado or any of its agencies.
State waters
means any and all surface and subsurface waters which are
contained in or flow in or through this State, but does not include
waters in sewage systems, waters in treatment works of disposal systems,
waters in potable water distribution systems, and all water withdrawn
for use until use and treatment have been completed.
Subsurface irrigation
means a discharge of graywater into soil a minimum of four
inches and no deeper than 12 inches below the finished grade.
Suitable soil
means unsaturated soil in which the movement of water, air, and the growth of roots is sustained to support healthy plant life and conserve moisture. Soil criteria for graywater subsurface irrigation are further defined in Attachment A to the ordinance codified in this chapter,
Graywater Design Criteria.
(Ord. 5094, 9-21-22)
The following meanings are associated with the acronyms used
in this chapter.
ANSI
|
American National Standards Institute
|
BK
|
Blocky
|
C.R.S.
|
Colorado Revised Statutes
|
CDPS
|
Colorado Discharge Permit System
|
FEMA
|
Federal Emergency Management Agency
|
gpd
|
Gallons per day
|
GR
|
Granular
|
mg/L
|
Milligrams per liter
|
MPI
|
Minutes per inch
|
NFIP
|
National Flood Insurance Program
|
NSF
|
NSF International, formerly known as National Sanitation Foundation
|
O&M
|
Operations and maintenance
|
OWTS
|
On-site wastewater treatment system(s)
|
PR
|
Prismatic
|
(Ord. 5094, 9-21-22)
The graywater use categories allowed are defined below. A facility
may have multiple graywater treatment works if all applicable use
and design requirements are satisfied.
(a) Category A: Single-Family, Subsurface Irrigation.
(1) Category A graywater use must meet the following:
(i) Allowed users: single-family.
(ii)
Allowed graywater sources: graywater collected from bathroom
and laundry room sinks, bathtubs, showers, and laundry machines.
(iii)
Allowed uses: outdoor, subsurface irrigation within the confines
of the legal property boundary.
(iv)
Design flow: The design flow for a single-family graywater treatment
works shall not exceed 400 gallons per day (gpd).
(b) Category B: Non-Single-Family, Subsurface Irrigation, 2,000 Gallons
per Day (GPD) or Less.
(1) Category B graywater use must meet the following:
(i) Allowed users: non-single-family users.
(ii)
Allowed graywater sources: graywater collected from bathroom
and laundry room sinks, bathtubs, showers, and laundry machines.
(iii)
Allowed uses: outdoor, subsurface irrigation within the confines
of the legal property boundary.
(iv)
Design flow: The design flow for a non-single-family graywater
treatment works shall not exceed 2,000 gallons per day (gpd) for outdoor
irrigation for the facility.
(c) Category C: Single-Family, Indoor Toilet and Urinal Flushing, Subsurface
Irrigation.
(1) Category C graywater use must meet the following:
(i) Allowed users: single-family.
(ii)
Allowed graywater sources: graywater collected from bathroom
and laundry room sinks, bathtubs, showers, and laundry machines.
(iii)
Allowed uses: indoor toilet and urinal flushing and outdoor,
subsurface irrigation within the confines of the legal property boundary.
(iv)
Design flow: The design flow for a single-family graywater treatment
works shall not exceed 400 gallons per day (gpd) for all approved
uses.
(d) Category D: Non-Single-Family, Indoor Toilet and Urinal Flushing,
Subsurface Irrigation.
(1) Category D graywater use must meet the following:
(i) Allowed users: non-single-family users.
(ii)
Allowed graywater sources: graywater collected from bathroom
and laundry room sinks, bathtubs, showers, and laundry machines.
(iii)
Allowed uses: indoor toilet and urinal flushing and outdoor,
subsurface irrigation within the confines of the legal property boundary.
(iv)
Design flow: There is no maximum design flow for a non-single-family
graywater treatment works for indoor toilet and urinal flushing. There
is no maximum design flow for wastewater from the facility that can
go to a closed sewerage system. The design flow is limited to 2,000
gallons per day (gpd) or less for outdoor irrigation for the facility.
(Ord. 5094, 9-21-22)
Category D non-single-family systems of over 2,000 gallons per
day must be operated by qualified personnel who meet any applicable
requirements of Regulation No. 100, the water and wastewater facility
operators certification requirements (5 CCR 1003-2).
(Ord. 5094, 9-21-22)
The provisions of this chapter are severable. If any portion
of this chapter should be declared invalid for any reason whatever,
such decision shall not affect the remaining portions thereof.
(Ord. 5094, 9-21-22)