Transcript Slide 1
Metropolitan Council Environmental Services Quarterly Environmental Compliance Report Presented to the Environment Committee April 28, 2009 Mary Gail Scott Manager, Environmental Compliance A Clean Water Agency WWTP Effluent Performance Mass discharge quarterly totals: Jan – Mar 2009 Pollutant Limitation (lbs./qtr) Reported (lbs./qtr) % of allowable CBOD 6,140,813 470,712 8 TSS 4,853,858 637,956 13 Phosphorus 151,757 59,345 39 Ammonia 768,014 248,963 32 1.18 0.33 28 486 mgd 300 mgd 62 Mercury Flow Metropolitan Council Environmental Services NPDES Permit Compliance – Discharge Exceedances Plant # Exceedances/Calendar Qtr Oct - Dec 08 Jan - Mar 09 Blue Lake 0 0 Eagles Point 0 0 Empire 0 0 Hastings 0 0 Metro 0 0 Rosemount 0 0 St. Croix Valley 0 0 Seneca 0 0 March 2009 marks 26 months of continuous compliance with discharge limitations of MCES facilities Metropolitan Council Environmental Services WW Mercury Reduction Identified dentist offices as significant sources of influent Mercury Partnered with MN Dental Association to encourage use of mercury amalgam separators in central vacuum systems Virtually 100% participation has reduced mercury influent to WWTP by approximately 50% State-wide program extension through MPCA MOU Metropolitan Council Environmental Services EC Updates 1. Mercury emissions at the Metro Plant continue to be very low. Metropolitan Council Environmental Services