Your Business Is Our Business. Septic Tank Cleaning Services - Humpty Doo, NT . Service: Disposal, Liquid Waste Collection, Sludge Pumping, Waste Treatment. Hours of Operation: Flexible Hours. Payment Method: Cash, Cheques, Direct Debit, EFT. Service Option: By Appointment, Free Quotes, Inspections, Mobile Service, Same Day Service, Takeaway. Type: Commercial, Industrial, Residential. Payment Concern: Rentals. Assurance: Accredited, Certified. Ownership: Australian Owned, Family Operated, Owner Operated