A. A Type 3 Recycled Water General Permit for
Gray Water allows for the use of gray water for landscape irrigation and
composting if:
1. The general permit
described in
R18-9-D701 does not
apply,
2. The flow is not more than
3000 gallons per day, and
3. The
gray water system satisfies the notification, design, and installation
requirements specified in subsections (B) and (C).
B. A person shall file a Notice of Intent to
Operate a Gray Water System with the Department on a form provided by the
Department. The Notice of Intent to Operate shall include:
1. The name, address, e-mail address, and
telephone number of the applicant;
2.
The social
security number of the applicant, if the applicant is an individual;
3.
A legal description of the direct reuse site,
including The latitude and longitude coordinates;
3. A description of the sources of gray water
and calculations demonstrating the flow is not more than 3000 gallons per
day;
4. Design plans for the gray
water system;
5. The applicant's
certification that the applicant agrees to comply with the requirements of this
Article and the terms of this Recycled Water General Permit for Gray Water;
and
6. The applicable permit fee
specified under 18 A.A.C.
14.
C. The following requirements apply to the
design, installation, and operation of a gray water system allowed under this
Recycled Water General Permit for Gray Water:
1.
Design of the gray water irrigation system shall
meet the on-site wastewater treatment facility requirements under
R18-9-A312(C), (D)(1), (D)(2), (E)(1), (G), and R18-9-E302(C)(1), except the
septic tank specified in R18-9-E302(C)(1) is not required if pretreatment of
gray water is not necessary for the intended application;
2.
Design of the dispersal trenches for the gray water
irrigation system shall meet the on-site wastewater treatment facility
requirements for shallow trenches specified in R18-9-E302(C)(2)
;
3.
The depth of the gray water dispersal trenches shall
be appropriate for the intended irrigation use but not more than 5 feet below
the finished grade of the native soil; and
4.
The void space volume of the aggregate fill in the
gray water dispersal trench below the bottom of the distribution pipe shall
have enough capacity to contain two days of gray water at the design
flow.
1. Human contact with
gray water and soil irrigated by gray water is avoided;
2. Gray water is not applied to an exposed
surface but into a bed or trench of permeable material, through piping
installed below the soil surface, or by similar means. Spray irrigation of gray
water is not allowed. The application of gray water shall not result in
standing water on the surface.
3.
The design shall ensure gray water is used and contained within the property
boundary for landscape irrigation or composting;
4. Gray water is not used for irrigation of
food plants, except for trees and shrubs which have an edible portion that does
not come into contact with the gray water;
5. The gray water may contain water from
drinking fountains but does not contain hazardous chemicals derived from
industrial, hobbyist, or similar activities at the site;
6. Gray water does not contain water used to
wash diapers or similarly soiled or infectious garments;
7. The gray water system is constructed so if
blockage, plugging, or backup of the system occurs, gray water can be directed
into the sewage collection system or on-site wastewater treatment and disposal
system, as applicable;
8. Gray
water surge tanks, if any, are covered to restrict access and to eliminate
habitat for mosquitoes or other vectors, and holding time is minimized to avoid
development of anaerobic conditions and odors;
9. The gray water system is sited outside of
a floodway;
10. The gray water
system is operated to maintain a minimum vertical separation distance of at
least five feet from the point of gray water application to the top of the
seasonally high groundwater table;
11. If an on-site wastewater treatment
facility is used for black water treatment and disposal, the use of a gray
water system does not change the design, capacity, or reserve area requirements
for the on-site wastewater treatment facility so the facility may handle the
combined black water and gray water flow; and
12. Any piping used in a gray water system
susceptible to cross connection with a potable water system clearly indicates
the piping does not carry potable water.
D. The applicant shall not operate the gray
water system until the Department issues a written Recycled Water Authorization
under
R18-9-A704(C).
E. The Department may issue a Recycled Water
Authorization that differs from the requirements specified in subsection (C) if
the system provides equivalent performance and protection of human health and
water quality.
F. In the Recycled
Water Authorization, the Department may require a permittee to report data or
information for any of the conditions in this section if the Department deems
the reporting necessary to protect human health or water quality or
both.
