ON-SITE SEPTIC PERMIT APPLICATION POLICIES
1. All designs for on-site sewage systems shall be prepared and submitted by a civil or sanitary engineer, certified
designer, or registered sanitarian. A resident owner of an existing or proposed single-family residence may
design or repair a conventional gravity system for that residence, if such a system meets or exceeds all the
requirements in “Design Standards for On-Site Sewage Systems,” as published and amended from time to time
by the Washington State Department of Health or in “Criteria for Sewage Works Design”, as published and
amended from time to time by the Washington State Department of Ecology.
2. All designs for on-site sewage systems MUST clearly identify the following elements on the submitted site plan:
a. Property boundary lines
b. Location of all surface water
c. Location of active and decommissioned wells
d. Location of any existing sewage disposal systems
e. Location of water supply line(s)
f. Location of all structures
g. Location of shoreline(s)
h. Location of all soil test holes
3. Soil tests MUST be performed by a civil or sanitary engineer, certified designer, soil scientist, or registered
sanitarian.
4. Soil logs shall have a minimum depth of 60 inches or reach ground water, whichever distance is less, and shall
note the texture, appearance, and type of soil according to the most recent “Soil Survey of Skagit County Area,
Washington” as published by the United States Department of Agriculture.
5. The person evaluating the soil and site shall record the following:
a) A minimum of two soil logs at each proposed disposal and reserve site(s)
b) The ground water conditions, date of the observation, and the anticipated maximum height of the
ground water table
c) The general topography of the site by drawing arrows on the site plan indicating the direction of
slope;
d) The drainage characteristic of the site
FOR STAFF USE ONLY
Attached Supporting Documents
_____Site Plan (2 copies
_____Soil Log (2 copies)
_____System Design Drawings (2 copies)
INCOMPLETE APPLICATIONS WILL NOT BE ACCEPTED