DUWA Issues Addendum No 3 for ‘Thermal Biosolids Drying System’ RFP Dec 3, 2019 | DUWA RFPs The Authority has released Addendum No 3 associated with the Thermal Biosolids Drying System Request for Proposal (“RFP”): https://duwauthority.org/wp-content/uploads/2019/12/Addendum-3-DUWA-Thermal-Biosolids-Drying-System-Design-Build-Project-12.3.19.pdf