Water Quality in the South Coast Study Region MLPA South Coast Scientific Advisory Team Water Quality Work Group Dominic Gregorio, SAT Member January 14,

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Presentation transcript:

Water Quality in the South Coast Study Region MLPA South Coast Scientific Advisory Team Water Quality Work Group Dominic Gregorio, SAT Member January 14, 2009 Marine Life Protection Act Initiative

17 million people living within coastal watersheds Much of coastal land use is urban and industrial Busy coastal ocean: -ports and marinas -dredging and ocean disposal -commercial shipping -military bases and operations -offshore oil drilling/production Southern California Bight

California Ocean Plan (COP) EPA-approved Water Quality Control Plan –Standards for ocean waters to 3 mile limit –Discharges outside are regulated to ensure “no violation” within state waters –Beneficial uses of ocean waters – human health and marine life receptors –Water quality objectives –Program of implementation Areas of Special Biological Significance (ASBS) Triennial reviews Amendments in progress

Areas of Special Biological Significance ASBS are Water Quality Opportunities 16 in Southern California, 6 mainland and 10 island All ASBS are Marine Managed Areas - State Water Quality Protection Areas Waste discharges are prohibited 2003 survey found storm water and other discharges Currently being regulated to maintain “natural water quality” Natural Water Quality Committee and ASBS Monitoring /ocean/asbs_nwqcommittee.shtml /ocean/asbs_nwqcommittee.shtml

Discharges into the Southern California Bight

National Pollutant Discharge Elimination System NPDES Waste Water Permits Waste water sources: Data Source: SCCWRP bi-annual reports

6.3 billion gallons per day Entrainment and impingement, regulated through National Pollutant Discharge Elimination System permits Thermal wastes In-plant wastes (sewage, chemicals - varies by plant) Much greater volume but generally much lower loading than Publicly Owned Treatment Works Power Plants

Publicly Owned Treatment Works Four large POTWS Los Angeles City (Hyperion) secondary treatment Los Angeles County (White Point) secondary treatment Orange County - primary treatment with chlorination San Diego (Point Loma) - primary treatment to begin chlorination 15 small POTWs directly discharging to Bight International waste water plant (Tijuana) Other small POTWs discharge to coastal streams

Data Source: SCCWRP and Discharger Self Monitoring Reports Historical Metal Discharge Rates

Offshore Oil Drilling and Production Most in federal outer continental shelf, some in state waters Small volume and loading in comparison to Publicly Owned Treatment Works Wastes streams include produced water, sanitary wastes, drilling mud and cuttings

Oil Spill Threats Tankers and other shipping Military operations Offshore platforms Pipelines Onshore oil production Refineries and terminal

NPDES Storm Water Permits Phase I and Phase II Municipal Permits Caltrans Statewide Permit Industrial and Construction General Permits

Discharge Comparison

Typical Annual Storm Water Runoff Annual volume comparable to POTWs, but largely untreated Land UseGallons (billions) Urban/suburban217 Agriculture11 Open space56 Total284

Storm Water Considerations Pollutants include trash/plastic debris, heavy metals, nutrients, PAHs, pesticides, pathogens and others Dry weather flow Atmospheric Deposition - air pollution and transportation sources

Effluent Dominated Streams Discharges from Publicly Owned Treatment Works and industries, dry weather runoff, and storm water –Examples from southern L.A. County: –Los Angeles River –Dominguez Channel –San Gabriel River

Land/Sea Interaction, Storm Run-Off

Commercial Vessel Discharges Ballast water- non-indigenous species introductions Graywater – source of pathogens and other pollutants Sewage disposal SB 771 prohibitions on certain vessel wastes – cruise ships and 300 gross ton vessels US EPA Vessel General Permit

Eutrophication Harmful Algal Blooms – Domoic Acid Poisoning Hypoxia – More pronounced threat in enclosed bays than in coastal waters Monitoring Efforts –HABMAP –SCCWRP Bight ’08 Nutrient Study

Mussel Watch Total PAH (44) ‘01- ‘02 Courtesy of A. Mearns and G. Lauenstein, 2007

Sediment Pollution Legacy pollutants –DDT, PCB –Persistent –bioaccumulation DDT at White Point Sediment pollution in bays and estuaries –Heavy metals, persistent organics –Maps at grams/bptcp/docs/sediment/072208_appendix_d. pdf grams/bptcp/docs/sediment/072208_appendix_d. pdf Harbor dredge spoils discharged offshore Data Source: EPA

Emerging Issues PBDEs flame retardants New pesticides (e.g. pyrethroids) Endocrine disruptors and other pharmaceuticals Climate Change –Global Issue –Sea level rise and temperature –Ocean acidification 1. Ocean Plan standards: (no more than 0.2 ph unit change allowable from “natural”)

Opportunities and Concerns Water Quality Opportunities –ASBS Major Water Quality/Industrial Concerns –Power Plant Intakes and Discharges –Large Storm Drains –POTW and industrial Waste Water Outfalls

Example Map, Water Quality Concerns

Next Steps SAT approval of maps, guidance document, and evaluation process. Maps will show all areas of water quality concerns, and water quality opportunities; the guidance document will expand on this. Evaluation process may consist of a scoring system to determine whether proposed MPAs are in areas of good water quality or bad water quality. Three particular areas may automatically get a bad rating : –Los Angeles and Long Beach Harbor –San Onofre Nuclear Generating Station –San Diego Harbor and vicinity of South Bay Power Plant* *South Bay Power Plant intake may be discontinued in the future due to lease status.