Renovation of a water / sewer project in Tacoma, Washington. Completed plans call for the renovation of a water / sewer project.

**As of August 11th,2025, this project has not yet been awarded. A timeline for the award has not yet been established.** The purpose of this RFP is to select a contractor capable and qualified to provide Odor Control Media Services. The result of this RFP will be the award and negotiation of a Services Agreement (SA). These services will be subject to the payment of prevailing wages. Question Deadline 06/25/2025 at 4:00 PM PT All questions must be submitted within the County eProcurement Portal Pierce County Planning and Public Works Department operates and maintains the Chambers Creek Regional Wastewater Treatment Plant (CCRWWTP) and its collection systems. To address vapor phase odor problems experienced in the collection system and at CCRWWTP, the County has installed scrubbers packed with odor control media at multiple locations/sites. Odors associated with wastewater conveyance and treatment are complex mixtures of hydrogen sulfide, organic sulfur compounds, volatile fatty acids, acetone, formaldehyde, ammonia, and organic nitrogen compounds. The current odor control media in use are two types of activated carbon (AC): one is a pelletized, coal-based, caustic (more specifically potassium hydroxide) impregnated AC, which is specified for its high removal capacity for hydrogen sulfide (H2S); and the other is a granular coconut shell AC, which is specified for its high removal capacity for volatile organic compounds (VOCs). Depending on the nature of odor problems and scrubber design, these two products are used either separately or in combination in current installations. This solicitation significantly revises product specifications to be inclusive of all potential odor control products on the market to meet the odor control needs of Pierce County. Potential proposers are provided the options of proposing a one-product solution, two-products solution, engineered media, so long as the requirement of the minimal removal capacity for H2S and VOCs are met. There are two parts to this procurement, Part I, Vapor Phase Odor Control Media, and Part II, Spent Media Changeout and Disposal. Scope of Services Part 1 Part I. Vapor Phase Odor Control Media Specifications For the purpose of establishing odor control media product specifications, the odor compounds are grouped into two major classes: o hydrogen sulfide (H2S) o Volatile Organic Compounds (VOCs) Specifications for H2S and VOCs Removal The main criteria for odor control media are removal capacity for H2S and VOCs. Removal capacity for H2S is expressed as gram (g) of H2S removed per unit volume of media, either cubic centimeter (cc) or milliliter (ml), used. VOCs removal is expressed either as butane activity or carbon tetrachloride activity (CTC). The required minimal removal capacity for H2S and VOCs are: o Minimum H2S Breakthrough Capacity 0.08 g H2S/ml(cc) media o Minimum Butane Activity, Weight 15% o Minimum Carbon Tetrachloride Activity (CTC), Weight 38% Proposers shall provide certification of analysis following these methods and submit documentation with proposals: o ASTM D6636-03, Standard Test Method for Determination of the Accelerated Hydrogen Sulfide Breakthrough Capacity of Granular and Pelletized Activated Carbon o ASTM D3467- 04 (2014), Standard Test Method for Carbon Tetrachloride Activity of Activated Carbon o ASTM D5742-16, Standard Test Method for Determination of Butane Activity of Activated Carbon Pierce County is not looking to modify or redesign current odor control scrubbers. Any proposed solutions shall work within the confines of existing system installations. Question Deadline 06/18/2025 at 4:00 PM PT Question Deadline 07/03/2025 at 4:00 PM PT