Alaska Administrative Code
Title 18 - Environmental Conservation
Chapter 72 - Wastewater Treatment and Disposal
Article 5 - Conventional Wastewater Systems
18 AAC 72.515 - Conventional wastewater systems requiring plan approval
Universal Citation: 18 AK Admin Code 18 AAC 72.515
Current through November 28, 2024
(a) Before constructing, installing, or modifying any part of a conventional wastewater system, a person must have prior department approval in accordance with 18 AAC 72.200 if
(1) the system has a design flow greater than
2,500 gallons per day;
(2) a single
lot or facility has more than one wastewater system and the cumulative I on-lot
or facility-wide design flow is greater than 2,500 gallons per day;
(3) the system serves more than one lot or
building not under the same ownership;
(4) the system receives non-domestic
wastewater; or
(5) the system does
not otherwise qualify for the exception under
18 AAC 72.511.
(b) In order for a submittal requesting department approval to be considered complete, in addition to the general items required for submittal under 18 AAC 72.205, an applicant must include
(1) a cover letter, engineer's
report, and calculations, sealed by a registered engineer, that fully describe
the project and type of facility and adequately demonstrate that the design
meets the applicable approval criteria in this chapter, including
(A) design flow calculations with the basis
used for calculation;
(B) waste
loads and waste strength with the basis for calculation if the system is
serving a facility other than a residential dwelling;
(C) information and calculations regarding
the septic tank size and tank design, including access openings and
security;
(D) methods of septic
tank pumping and location of septage disposal;
(E) information and calculations regarding
the sizing and design of the soil absorption system;
(F) information and calculations regarding
private and community sewer lines slopes, conduit velocity, materials, and
other relevant details;
(G)
information and calculations regarding pumping station design, pump selection,
system curves, pressurized sewer lines, and other relevant details;
(H) thermal protection including potential
seasonal use considerations;
(I)
siting of the system with respect to potential hazards such as slopes and cut
banks;
(J) siting of the system
with respect to private and public water systems, groundwater, and surface
water, and information on how the system is protective of public health,
drinking water sources and systems, surface water and groundwater;
(2) an engineered soils report
that
(A) identifies the locations of borings,
test holes, and percolation tests and describes how they are sufficient to
adequately evaluate subsurface characteristics of the area planned for the
initial and replacement soil absorption systems;
(B) contains test hole or boring logs that
includes information on soil classification, texture, structure, density, and
moisture conditions;
(C) if soils
are not classified as SW or SP, includes a description of the method and the
results of percolation tests of the receiving soils;
(D) identifies the depth to groundwater and
depth to any seeps encountered; and
(E) identifies the depth to impermeable
layers, including the presence or absence of permafrost and potential effect on
system performance;
(3)
design drawings sealed in accordance with
12 AAC 36.185 -
12 AAC 36.245 that clearly and
legibly depict the design on 8 1/2-inch by 11-inch or 11-inch by 17-inch paper
format; the design drawings must include
(A)
scaled site plan that shows the buildings, all wastewater system components and
area for replacement infiltrative area, all nearby drinking water sources
labeled with the classification of the water system, all nearby surface water,
and topography of the site;
(B) the
plan and profile of private and community sewer lines showing slope, cleanouts,
and manholes with invert elevations;
(C) profiles, cross-sectional drawings, or
details of all system components as necessary to show methods of construction,
bedding and backfill, and conformance with the requirements of
18 AAC 72.530 and standard
sanitary engineering principles and practices;
(4) additional supporting information
including
(A) specifications of materials,
quality assurance and quality control parameters, engineer observations, and
other information that will assist the department in evaluating whether the
system design will be installed in accordance with the plan,
approval;
(B) if the system design
flow, total on lot design flow, or facility-wide design flow is greater than
2,500 gallons per day, nitrate calculations that are prepared in accordance
with standard sanitary engineering principles and practices, are sealed by a
registered engineer, and demonstrate that nitrate concentrations in the
groundwater aquifer that is most likely to be affected by proposed and existing
systems will not exceed five milligrams per liter beyond a distance measured
from the edge of the soil absorption field to the nearest downgradient property
line, or to a point that the department identifies as necessary to protect
public health, public and private water systems, and the environment;
and
(5) other information
the department determines is necessary to assess the effect of the conventional
wastewater system upon public health, public and private water systems, and the
environment.
(c) If the department requires additional information, or the application is determined to be incomplete, the department will notify the applicant. If the applicant fails to provide the additional information not later than 45 days after the department's request, the department will close the application as incomplete and the applicant must submit a new application and plan review fee.
Authority:AS 44.46.020
AS 44.46.025
AS 46.03.020
AS 46.03.050
AS 46.03.100
Disclaimer: These regulations may not be the most recent version. Alaska may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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