To protect public health and the environment through innovative and cost effective wastewater and solid waste management, and in doing so convert waste into resources such as recycled water, energy, and recycled materials.
In 2004, the Sanitation Districts implemented the Nitrification/Denitrification (NDN) process at the SJCWRP. The conversion to NDN was necessitated by discharge limits for ammonia nitrogen (NH3-N), nitrite nitrogen (NO2-N), and nitrate nitrogen (NO3-N) that were added to permits issued by the Regional Water Quality Control Board – Los Angeles Region. The conversion to NDN reduced the secondary treatment system’s ability to reliably treat peak flows and constituent loads, particularly those of ammonia. Incomplete nitrification of secondary effluent can jeopardize the efficacy of virus inactivation during the disinfection process. Since implementation of the NDN process, the SJCWRP has consistently met discharge and Title 22 reuse permit requirements. However, as flows increase over time, compliance may become more challenging. Therefore, improvements to the NDN process performance are needed to ensure the SJCWRP will reliably meet discharge and reuse requirements at the plant’s permitted capacity. As part of this process optimization, the Joint Outfall Districts has begun construction of an 8 million gallon flow equalization tank. This tank will optimize the operation of the treatment plant as well as increase the availability of recycle water for use in our community. The process optimization project was approved by our Board of Directors in September 2014.
A highly corrosive environment inside of our trunk sewers has damaged some of our trunk sewers. Sewage, under certain conditions, can generate hydrogen sulfide gas, which can become a corrosive acid in the headspace of the sewer. Sewers constructed with concrete pipe are highly susceptible to corrosion from the acidic conditions. The structural integrity of a sewer can be compromised as the inner concrete surface and reinforced steel corrode. If actions are not taken to mitigate the corrosive environment and repair existing damage structural deterioration will continue and sewer collapse will eventually result. This corrosive environment is resulted in a number of trunk sewer rehabilitation projects in the Joint Outfall System.
The Joint Outfall Districts have embarked on a major, long-term project to address aging infrastructure - most notably two existing tunnels that have been in service for over 55 years and do not meet current seismic codes. The project (also known as the Clearwater Program) is the construction of a new 7-mile long tunnel that is essential to managing all the treated wastewater produced at our largest facility (the JWPCP) and would help facilitate large-scale water recycling in the future. The facility plan and associated environmental impact report for this project was approved in November 2012.
In order to comply with a Federal and State mandate for the amount of chloride (salt) in our recycled water discharged from the Valencia and Saugus Water Reclamation Plants to the Santa Clara River, the Santa Clarita Valley Sanitation District has approved and will be constructing compliance facilities. This project will consist of microfiltration, reverse osmosis, UV disinfection, and brine disposal via deep well injection.