Groundwater Ultraviolet Disinfection Facility - 09-RWS-19 - City of Casper

This project will provide supplemental disinfection for the groundwater supplies. The ultraviolet disinfection facility would provide disinfection of up to 18 MGD of groundwater supplies. The Environmental Protection Agency over the last 20 years has questioned the treatment capability of the RWS groundwater disinfection system. The RWS has groundwater under the influence of a surface source (GWUDI). The enhanced surface water treatment rule and Long Term 2 surface water treatment rule need to be met by the RWS groundwater system. At the current time (issued in 2005), EPA has granted to the RWS a variance to utilize riverbank filtration in conjunction with ozonation, chloramination, and corrosion control for the RWS groundwater source. Even though no cryptosporidium or giardia has ever shown up in the groundwater finished water, EPA still has concerns. The use of ultraviolet disinfection either alone as a primary disinfectant or as an additional barrier in conjunction with ozone in addition to chloramination would ensure inactivation of cryptosporidium and giardia. Ozone is critical to the surface water Acti-Flo process and cannot be switched to a different process. The RWS groundwater supply is used on a year around basis. The RWS surface water treatment plant is used only as a peaking plant during high demand periods from mid-May through Mid-September. As of November 17, 2022, this project is in the conceptual phase. An engineer will not be selected until funding is secured, which is anticipated to take a year. A firm timeline for construction has not been determined.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 03 -	Concrete, Precast Concrete.
Division 04 -	Masonry, Unit Masonry.
Division 05 -	Metals, Structural Metal Framing, Metal Fabrications.
Division 06 -	Wood, Plastics, and Composites, Rough Carpentry.
Division 07 -	Thermal and Moisture Protection, Dampproofing and Waterproofing, Thermal Protection.
Division 08 -	Openings, Doors and Frames, Windows, Hardware.
Division 09 -	Finishes, Painting and Coating.
Division 10 -	Specialties, Signage, Compartments and Cubicles, Emergency Aid Specialties, Fire Protection Specialties, Storage Assemblies.
Division 11 -	Equipment, Laboratory Equipment.
Division 14 -	Conveying Equipment.
Division 21 -	Fire Suppression, Fire-Extinguishing Systems.
Division 22 -	Plumbing, Instrumentation and Control for Plumbing, Plumbing Piping, Plumbing Equipment, Plumbing Fixtures.
Division 23 -	Heating, Ventilating, and Air Conditioning (HVAC), Instrumentation and Control for HVAC, HVAC Air Distribution.
Division 26 -	Electrical, Instrumentation and Control for Electrical Systems, Interior Lighting, Emergency Lighting, Exit Signs, Exterior Lighting.
Division 27 -	Communications, Structured Cabling, Data Communications, Voice Communications, Distributed Audio-Video Communications Systems.
Division 28 -	Electronic Safety and Security, Electronic Access Control and Intrusion Detection, Access Control, Intrusion Detection, Electronic Surveillance, Electronic Detection and Alarm.
Division 31 -	Earthwork, Earthwork Methods.
Division 32 -	Exterior Improvements, Flexible Paving, Rigid Paving, Curbs, Gutters, Sidewalks, and Driveways, Fences and Gates, Turf and Grasses.
Division 33 -	Utilities, Water Utilities, Storm Drainage Utilities, Electrical Utilities, Communications Utilities.
Division 44 -	Pollution and Waste Control Equipment, Common Work Results for Pollution and Waste Control Equipment, Air Pollution Control, Noise Pollution Control, Odor Control, Water Pollution Control Equipment, Solid Waste Control and Reuse, Waste Thermal Processing Equipment, Fluidized Bed Combustion Equipment, Rotary Kiln Incinerators, Pyrolysis Equipment, Hazardous Waste and Medical Waste Incinerators, Heat Recovery Equipment for Waste Thermal Processing, Synthesis Gas Cleanup and Handling Equipment.