Ariz. Admin. Code § R18-5-408 - On-Site Wastewater Treatment Facilities
A. "On-site wastewater treatment facility"
has the meaning defined in A.R.S. §
49-201(29)
On-site wastewater treatment facilities shall be governed by A.A.C. Title 18,
Chapter 9, Articles 1 and 3.
B.
Where soil conditions and terrain features or other conditions are such that
on-site wastewater treatment facilities cannot be expected to function
satisfactorily or where groundwater or soil conditions are such that on-site
wastewater treatment facilities may cause pollution of groundwater, they are
prohibited.
C. Where such
installations may create an unsanitary condition or public health nuisance,
on-site wastewater treatment facilities are prohibited.
D. The use of cesspools is
prohibited.
E. Where an on-site
wastewater treatment facility is proposed, the following conditions shall be
satisfied:
1. A geological report shall be
made by an engineer, geologist or other person who meets the qualifications in
R18-9-A310(H).
The geological report shall include the total nitrogen discharge requirements
of R18-9-A309(8)(c). The geological report shall include results from
percolation tests and boring logs obtained at locations designated by the
county health departments. There shall be a minimum of one percolation test and
boring log per acre, or one percolation test and boring log per lot where lots
are larger than one acre, except when it can be shown by submission of other
reliable data that soil conditions are such that on-site wastewater treatment
facilities could reasonably be expected to function properly on each lot in the
proposed subdivision. The Department may require additional tests when it deems
necessary. Percolation tests shall be performed in accordance with all of the
requirements in R18-9-A310(F), except for the requirements in
R18-9-A310(F)(1)(a). The approval of a subdivision, based upon such reports,
shall not extend to the plat if it is further subdivided or lot lines are
substantially relocated.
2. Results
of all tests shall be submitted to the Department and the local health
department for review and approval of the subdivision for the use of on-site
wastewater treatment facilities.
3.
Such approval must be obtained in writing from the local health department and
a copy of the approval shall be submitted to the Department with the
subdivision application for approval.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
A. Recommendations are found in the engineering bulletins of the Department and such additional requirements as may be provided by local health departments to assist in approval regarding the design, installation and operation of individual sewage disposal systems. Copies of these bulletins may be obtained from the Department .
B. Where soil conditions and terrain features or other conditions are such that individual sewage disposal systems cannot be expected to function satisfactorily or where groundwater or soil conditions are such that individual sewage disposal systems may cause pollution of groundwater, they are prohibited.
C. Where such installations may create an unsanitary condition or public health nuisance, individual sewage disposal systems are prohibited.
D. The use of cesspools is prohibited.
E. Where an individual sewage disposal system is proposed, the following conditions shall be satisfied:
1. A geological report shall be made by an engineer, geologist or other qualified person. The geological report shall include results from percolation tests and boring logs obtained at locations designated by the county health departments. There shall be a minimum of one percolation test and boring log per acre, or one percolation test and boring log per lot where lots are larger than one acre, except when it can be shown by submission of other reliable data that soil conditions are such that individual disposal systems could reasonably be expected to function properly on each lot in the proposed subdivision . The Department may require additional tests when it deems necessary. The approval of a subdivision , based upon such reports, shall not extend to the plat if it is further subdivided or lot lines are substantially relocated.
2. Results of all tests shall be submitted to the Department and the local health department for review and approval of the subdivision for the use of individual sewage disposal systems.
3. Such approval must be obtained in writing from the local health department and a copy of the approval shall be submitted to the Department with the subdivision application for approval .