Sierra Aluminum Company: A Corporate Priority to Stormwater Compliance
This presentation will focus on the importance of meeting the requirements of the IGP within the Sierra Aluminum Company (Sierra) operations and the innovative structural and treatment BMPs the company has used at their locations.
Sierra is an employee owned manufacturer of standard and custom aluminum extrusions located in Southern California. Sierra operates two major manufacturing campuses in Riverside and Fontana. Both campuses are located within the Upper Santa Ana River watershed with manufacturing capabilities including billet casting, extrusion, painting, anodizing, and thermal improvements. Most of the employees live within the Upper Santa Ana River watershed. As a result, Sierra has a solid presence in the community and strives to be a resilient environmental steward. As a member of the Aluminum Extruders Council, Sierra participated in an environmental product declaration (EPD) in accordance with ISO 14025. This process includes a Life Cycle Assessment to provide information on environmental impacts of their products over their life cycle.
All the Sierra Aluminum facilities are subject to the California Industrial General Permit (IGP). To ensure compliance and reduce potential impacts to the watershed, Sierra designed and built BMPs at their facilities which have effectively reduced pollutant concentrations to meet NALs. We will present the analytical results for three of the facilities and show how the facilities reduced pollutant concentration through the implementation of BMPs. The presentation will highlight the aluminum particulate filter system developed to address pollutants resulting from the aluminum billet casting operations at their Riverside facility. The facility engineer used concepts from the existing industrial wastewater treatment system and applied them to stormwater. This system has been designed to filter aluminum particulate out of stormwater prior to discharge. The aluminum treatment system is a modular design and can be modified to increase filter capabilities depending on aluminum concentrations determined from stormwater sampling analytical results.
The outdoor yard area was also re-configured to lengthen stormwater residence time on site through a series of trenches. This feature permits capabilities to manage dissolved aluminum in the stormwater through neutralization. Dissolved aluminum can be precipitated out and then removed through the stormwater filter system.
The presentation will also discuss potential for stormwater reuse at the Riverside facility. Following the presentation, there will be an interactive discussion to brainstorm on site structural requirements as well as municipal policy changes that may be necessary to use stormwater for operations at the Riverside facility.