Waste Characterization – Solid Waste Generation Study, West Contra Costa, California

The West Contra Costa Integrated Waste Management Authority retained SCS Engineers to conduct studies on waste generation to set a new base-year. The project included residential surveys for source reduction, commercial waste assessments and analysis of DRS data, and review of hauler disposal and recycling information.

A new 2001 base-year diversion rate of 43 percent was established as a result of the project. The study was the first 2001 New Base-Year approved by the Calfornia Integrated Waste Management Board (CIWMB). Tasks included:

  • review of disposal data from disposal reporting system and landfills
  • diversion analysis, including governmental agencies, residential surveys and recyclers
  • franchised haulers’ construction and demolition source reduction
  • commercial waste assessments of 100 businesses
  • identification of diversion opportunities
  • preparation of CIWMB Base Year Modification Certification forms
  • identification of top 10 generators
  • identification of all diversion by material type and diversion type (source reduction, reuse, recycling, composting, etc.)