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