Class I 11 - 30 Points
Class II 31 - 55 Points
Class III 56 - 75 Points
Class IV 76 Points or greater
Wastewater Treatment Facilities other than those with on-site wastewater disposal systems, scoring fifteen (15) points or less, shall be exempt from the requirements of subsection 4.1 of these regulations, and the owner shall be so notified by the Department. Wastewater Treatment Facilities with on-site wastewater disposal systems only, scoring ten (10) points or less, shall be exempt from the requirements of these regulations (unless otherwise required by the Department), and the owner shall be so notified by the Department.
7 Del. Admin. Code § 7204-5.0