OCSD was the first wastewater treatment agency to be certified to National Biosolids Partnership 
Platinum standards. 

The OCSD Biosolids Policy includes commitments to research and implement ways to reduce the volume 
of biosolids; support recycling biosolids; and balances financial, environmental and societal 
considerations when making biosolids decisions. 

In 2003, the Long-Range Biosolids Management Plan provided guidelines for biosolids management, 
which has resulted in two partnerships to build private merchant facilities, which minimizes risk to 
OCSD’s capital. Although one of these facilities did not finish commissioning, it was an innovative 
approach that moved the biosolids industry a step forward and provided many lessons learned for the 
next generation.  

The 2017 Master Plan is currently in progress and will update the capabilities of OCSD’s facilities, 
processes, and strategic partnerships relative to biosolids management. 

OCSD continues the 2003 recommendations of a diversified portfolio of offsite biosolids management 
options with multiple biosolids contractors, markets, and facilities.  End use of the product includes: 
composting, direct land application, and landfill services.  Fail-safe back-up options have been 
established to ensure that 100% of OCSD’s daily biosolids production is handled in a sustainable manner. 

OCSD demonstrates the benefits of biosolids compost by using it in the landscaping at the District 
facilities.  Additionally, compost is made available to employees who are encouraged to share the results 
of their compost use via social media. 

OCSD is Title 22 compliant, holds an NPDES permit, and regularly meets other regulatory requirements, 
including 40 CFR Part 503 Class B Pathogen Reduction and Vector Attraction Reduction. 

OCSD won a 2014 graphics design award for its Biosolids Management Program Performance report 
brochure that communicated key information about our biosolids program to interested parties. OCSD 
continues to provide periodic stakeholder updates to relay program developments to interested parties, 
and track their input. 

Performance Measures & Results 



Beneficial biosolid use: In 2015, 94% of all biosolids processed at OCSD were recycled.   



Carbon Sequestration via Class A and/or Class B biosolid land application: Nearly 13,000 metric 
tons of CO2  (2014 BMPP) 



Land Use Applications: Biosolids provided by OCSD resulted in the substitution of 240,000 lbs of 
nitrogen (NO3-N) in 2015.  



Land Use Chemical Reduction: The potassium, phosphorus and calcium derived from OCSD 
provided biosolids resulted in reduced need for chemical fertilizers; and contributed to the 
production of 2.2 tons per acre of wheat, 3 tons per acre of oats, and 3.2 tons per acre of sudan.  





Partnerships in place with one or more community organizations, with specific name given to 
partnership and objectives for the partnership established (e.g., a formalized partnership among