Rule 15-18-77-5.5.17 - Construction1. The chamber system absorption trenches shall be a minimum of 18 inches and a maximum of 36 inches in width.2. The bottom of the trenches shall have a grade from level to no greater than two (2) inches fall per 100 feet. 3. The grade shall be measured from the trench bottom and not the chamber top.4. The chamber system shall be covered as per the manufacturer's specifications. In all cases there shall be a minimum of 12 inches of soil cover over the chamber system.5. The minimum height of a chamber, at its centerline, shall be 8 inches.6. The last chamber in each "run" shall be terminated with an end plate.15 Miss. Code. R. 18-77-5.5.17