Abstract: The septic tank of the subject invention can be provided in kit form, and preferably comprises a tank lid, a tank bottom, a pair of opposing side walls, and a pair of opposing end walls having a tank flow outlet and a tank flow inlet, where a flange is affixed within the tank flow outlet and the tank flow inlet. The tank lid comprises a pair of lid openings, which are covered by hatch covers. The hatch covers comprise a hatch handle for ease of removal and are removable affixed to the tank lid with angle connection brackets. The septic tank is assembled using angle connection brackets, where the brackets are affixed to the tank lid, tank bottom, side walls, and end walls using, for example, stainless steel cap screws. A silicone sealant is interposed between the tank lid, tank bottom, side walls, end walls and the connection brackets, forming a substantially leak proof seal.