Alabama Administrative Code
Title 420 - ALABAMA STATE BOARD OF HEALTH
Chapter 420-3-1 - ONSITE SEWAGE TREATMENT AND DISPOSAL
Tanks, Advanced Treatment, And Pumps
Section 420-3-1-.20 - Tank Installation

(1) Tanks shall be installed on a level, firm, and compacted surface such that the tank is placed both longitudinally and laterally level. A minimum layer of 2 inches of sand or gravel placed level in the tank hole is recommended for leveling purposes.

(2) Installation instructions shall be followed where specific installation instructions are provided by the tank manufacturer. All non-concrete tanks shall be accompanied by clear and concise instructions from the manufacturer for the proper installation of the tank.

(3) Risers on a tank for a dwelling may be placed above final grade but shall not be placed greater than 6 inches below final grade.

(4) Risers on a tank for an establishment shall be brought to minimum of finished grade.

(5) The inlet and outlet materials and pipe connections shall conform to the applicable section of the International Private Sewage Disposal Code.

(6) When tanks are connected in series to obtain the required capacity, a baffle wall shall remain in the last tank.

(7) A new tank that requires repair prior to being placed into use shall be repaired to meet the standards of these rules and shall be repaired as directed by the manufacturer. Repair of a tank already in use shall be coordinated with the LHD and shall meet th requirements of 420-3-1-.32 Repair and Relocation of an Existing OSS/EDS. A repaired tank shall be subjected to the same structural and water-tightness tests as required by ASTM (concrete) or IAPMO (non-concrete) tanks.

(8) The OSS/EDS owner shall be responsible for prohibiting unauthorized access to any sewage tanks by following sewage tank lid and riser manufacturer specifications.