Southern California NPDES Receiving Water Monitoring

In accordance with NPDES permit requirements, MBC conducts ongoing offshore marine monitoring programs for coastal generating stations operated by RRI (Ormond Beach and Mandalay), LADWP (Harbor, Haynes and Scattergood), El Segundo Power (El Segundo), Long Beach Generation (Long Beach), AES (Alamitos, Huntington Beach, and Redondo Beach), and SCE (San Onofre). MBC has been involved with these programs since the early 1970s.

The biannual monitoring programs include sample collection and analysis of the marine biology, water quality, and sediment characteristics along the coastal areas of Ventura, Los Angeles, Orange, and San Diego Counties. The biological tasks include fish and macroinvertebrate trawls, subtidal diver transect surveys, collection and analysis of benthic infauna, and macrobiota studies. Water quality and sediment monitoring includes both physical and chemical measurements.

Physical measurements consist of ebb and flood tide CTD profiles; chemical measurements include sediment grain size distribution, sediment metal analyses, and mussel bioaccumulation analysis. At some facilities, discharge samples are analyzed in MBC's toxicity laboratory. Additional studies off San Onofre include a radiological ecological monitoring program and kelp bed surveys. The results of all analyses and trends are reported in annual monitoring reports to the regulatory agencies.

Related Projects: Port of Long Beach Stormwater and Ambient Water Quality studies, and San Elijo JPA NPDES monitoring (2008-2010).