Specifications include, but are not limited to: Unit shall be a single 7,000-gallon horizontal tank, split into 3,000 and 4,000 gallon tanks with dual wall construction. Approval drawings shall be required before fabrication of the unit may begin. Structural shapes and sheet material shall be ASTM A36, minimum. The unit provided shall be U.L. 142 approved and meet all applicable EPA requirements. Seven, 4-inch NPT openings in top of primary tank and emergency vent opening(s) as required by U.L. 142. Tank charts shall be delivered with each tank. The unit shall be non-roll or skid mounted. Tank shall include lifting lugs to facilitate handling without disassembling unit. Unit shall accept installation of Veeder-Root type tank monitor on both sections of tank.