On-Site Sewage Contractor Exam |54 Q’s and A’s
Absorption field lengths are determined - -by the # of bedrooms in a home or estimated
gallon per day water usage
-Absorption field depths are determined by - -the soil conditions on the property
-From wells to springs - -a minimum of 50' from septic tanks and a minimum of 100' from
absorption fields
-From property lines served by the public - -a minimum of 10' from septic tanks and a
minimum of 5' from the absorption fields
-From property lines served by individual - -absorption lines must be 50' from adjacent
property unless development is preplanned
-From bodies of water or impoundments - -minimum of 25' from septic tanks and min 50'
from absorption fields
-From streams or tributaries - -a min of 25' from septic tanks and a min of 50' from
absorption fields
-From ponded wetlands - -a minimum of 50' for absorption fields
-Building with a basement - -septic tank and absorption fields a minimum of 10' from
foundation
-From a drainage ditch, trash pits, and embankments - -15 feet
-If the water supply crosses or comes within 10 feet of the absorption field - -the water
supply line shall be installed at least 12 inches above the top of the aggregate layer of the
absorption field line and shall be encased in single-length larger diameter
-After the permit has been issued - -any grading, filling or other site modifications that
would adversely affect the system will render the permit void
-the first component of an on-site sewage management system - -the septic tank
-Septic tanks are generally pre-cast with - -concrete and delivered to the site. They can
also be poured in place when necessary
-Septic tanks must have 2 compartments with the first - -designed to contain at least 2/3
of the total liquid capacity of the tank
Absorption field lengths are determined - -by the # of bedrooms in a home or estimated
gallon per day water usage
-Absorption field depths are determined by - -the soil conditions on the property
-From wells to springs - -a minimum of 50' from septic tanks and a minimum of 100' from
absorption fields
-From property lines served by the public - -a minimum of 10' from septic tanks and a
minimum of 5' from the absorption fields
-From property lines served by individual - -absorption lines must be 50' from adjacent
property unless development is preplanned
-From bodies of water or impoundments - -minimum of 25' from septic tanks and min 50'
from absorption fields
-From streams or tributaries - -a min of 25' from septic tanks and a min of 50' from
absorption fields
-From ponded wetlands - -a minimum of 50' for absorption fields
-Building with a basement - -septic tank and absorption fields a minimum of 10' from
foundation
-From a drainage ditch, trash pits, and embankments - -15 feet
-If the water supply crosses or comes within 10 feet of the absorption field - -the water
supply line shall be installed at least 12 inches above the top of the aggregate layer of the
absorption field line and shall be encased in single-length larger diameter
-After the permit has been issued - -any grading, filling or other site modifications that
would adversely affect the system will render the permit void
-the first component of an on-site sewage management system - -the septic tank
-Septic tanks are generally pre-cast with - -concrete and delivered to the site. They can
also be poured in place when necessary
-Septic tanks must have 2 compartments with the first - -designed to contain at least 2/3
of the total liquid capacity of the tank
