1. Post Point WWTP – Improvements Required To Address The Aging Solids Stream Train
Solids Stream Train incinerator (#1) built in 1972
Liquids Stream Train recently upgraded (2014)
Opportunity for resource recovery
Liquids just upgraded, but solids stream untouched as part of project. Because of aging, the incinerators need to be replaced. City taking the opportunity to look at replacement options beyond “in kind” and ones that offer resource recovery opportunity, which is in keeping with City environmental ethic.

2. A Prime Opportunity Recover Resources at Post Point
As a result of regulation (CWA) around sending raw sewage straight to water bodies, wastewater treatment required and a decision needed as to what to do with it – recycle as biosolids, incinerate, or landfill it.
Brown and Caldwell

3. Post Point Biosolids Alternatives Were Evaluated Using the TBL+ Framework
2-Step Process 1
High level screening of potential alternatives 2
TBL+ evaluation of most feasible alternatives
Brown and Caldwell

4. Step 1 – Resulted in Four Short-listed Conceptual Alternatives that are Digestion-Based
Digestion System Location (Biosolids Class)
Post Digestion Location
(Product Biosolids Class)
Beneficial End Use
Alternative 1
Post Point (Class B) NA
Class B Land Application at permitted sites
Alternative 2
Dryer at Post Point
(Class A)
Class A Dried Fertilizer Product
Alternative 3
Post Point (Class A)
Soil Blending Off-site (Class A)
Class A Manufactured Topsoil
Alternative 4
Off-site (Class A)
Brown and Caldwell

5. Step 2 – Comparison of Preliminary TBL+ Results
Technical
Technical
Technical
Technical
Technical
Technical
Financial
Financial
Financial
Financial
Financial
Compatibility with Criteria
Social
Social
Social
Social
Social
Environmental
Environmental
Environmental
Environmental
Environmental 0%
Ideal
Post Point Class B
Post Point Class A Dried
Post Point Class A Soil
Off-site
Class A Soil

6. Step 2 – Comparison of Preliminary TBL+ Results
100%
Technical
Technical
Technical
75%
Financial
Technical
Financial
Technical
Financial
Financial
Compatibility with Criteria
50%
Financial
Social
Social
Social
Social
Social
25%
Environmental
Environmental
Environmental
Environmental
Environmental 0%
Ideal
Post Point Class B
Post Point Class A Dried
Post Point Class A Soil
Off-site
Class A Soil

7. The Project Team Visited Area Class A Biosolids Programs with Local Distribution of Product
“Sumner Grow” (City of Sumner)
“Tagro” (City of Tacoma)
Brown and Caldwell

8. Public Outreach Program Continues to Inform the Process
May 23, 2017 – Community Workshop
General support for moving away from incineration
FAQs and responses now posted on City’s biosolids website
July 31, 2017 – Follow-up Community Workshop Scheduled
Update on project status
Overview of preliminary TBL+ results