from HOOT AEROBIC SYSTEMS, INC., on-site wastewater treatment system
The ANSI/NSF Standard 40 requires a minimum removal efficiency for the performance of Aerobic Wastewater Treatment Systems. For a system to be certified as a Class I Treatment unit the arithmetic mean of all effluent samples collected in a seven day period must be less than 45 mg/L. If properly serviced , the system should produce effluent equal to that of the system that was tested. The HOOT Aerobic System had an arithmetic mean BOD5 of 9 and a Suspended Solids arithmetic mean of 9.unit the arithmetic mean of all effluent samples collected in a seven day period must be less than 45 mg/L. The HOOT Aerobic System had an average CBOD5 of 2.4 and a Suspended Solids average of 1.8 with both averaging 99% removal efficiency…. [Download PDF of Owner’s Manual]