This document discusses stormwater management best practices. It defines stormwater and how it can pollute receiving waters. Both non-structural and structural best management practices are described to control stormwater pollution from various sources. Non-structural practices include good housekeeping, reducing exposure, spill prevention plans and waste management. Structural practices include rain gardens, sediment controls and detention basins. The document provides examples of best practices for activities like equipment washing, fueling and spill response. It emphasizes that low-cost non-structural practices are the primary way to reduce stormwater impacts.

1. Stormwater
Best Management Practices

2. • Stormwater is runoff from rain, snow/snowmelt,
surface runoff and drainage.
• Stormwater can pick up litter,organic materials,
sediment, salts and other chemicals before flowing
back to lakes and streams.
• Water can cause damage to land under
construction, or land that is improperly vegetated by
washing away soil and sediments.
• Sediments, organics and litter contribute to
impairment of receiving waters.
• Storm sewer versus sanitary sewer
What is stormwater?

5. Stormwater Regulations
• Municipal Separate Storm Sewer System (MS4) permit
is campus-wide stormwater permit to control non-point
sources (umbrella over all activities)
– UMTC
– UMD
• Industrial Stormwater permits for certain
industries/sectors
– Printing
– Fueling
– Electric generation
– Waste management
– Mining
• Construction Stormwater Permits for certain projects (>1 acre)
• University Policy – BMPs for all activities, lowest impact choice

6. Best Management Practices
• Stormwater Control Measures fall into
categories
– Good Housekeeping
– Erosion Prevention and Sediment Control
– Maintenance of BMPs and Equipment PM
– Eliminate and Reduce Exposure
– Management of Runoff
– Spill Prevention and Response
– Salt Storage
– Employee Training

7. Best Management Practices
• Non-Structural
– Good Housekeeping
– Labeling
– SOPs
– PMs
– Reduce and
eliminate exposure
– Control inventory
– Waste management
• Structural
– biologs
– silt fences
– detention and
infiltration basins
– inlet bags
– rain gardens and
swales
– Gabion bags/racks
Lessen the need for more
costly structural BMPs
Engineered solutions to
stormwater management

9. Examples

12. Good Housekeeping
• Easy, cheap and makes good business
sense
• Always put things away
• Keep work area tidy
• Follow work instructions and SOPs
• Remove waste and put into proper
containers
• Manage inventory/labeling

14. Labeling and Inventory Control
• Are you buying it 3 times?
• Label with the contents, NFPA diamond
or hazard description
– Also an RTK requirement
• If waste, additional requirements apply
• Control access to prevent accidents,
vandalism
• Control inventory (JIT ordering or
minimal supplies to prevent waste)

16. Erosion Prevention and Sediment Control
• Erosive forces: flow volume and velocity
• Strategies for control:
– Keep soils in place
– Slow down water
– Treat on the way
• Key to erosion prevention is vegetation and minimization of hard
surfaces.
– Nonstructural BMPs play largest role in prevention
– Vegetate and revegetate
• Vegetation allows infiltration, reduces speed and provides
treatment
• Once soils are dislodged: control inlets, flow direction and
velocity using structural BMPs
• Combination of structural and non-structural

20. Reduce and Eliminate
Exposure
• Protects stormwater by removing potential for contact
• Avoid doing activities that generate dust, emissions or
waste outside
– Move activities to a building or covered area
– Use temporary measures that minimize contact with the
ground, air and water
– Use mechanical means to cleanup (not water)
• Store materials, supplies and wastes indoors or under
cover
• Limit access to materials to prevent accidental damage,
spills or vandalism

21. Work Instructions/SOP
• Standard operating practices
encourage:
• Consistency in practices
• Best practices
• Pollution prevention
• Base of common knowledge
• Examples include equipment washing,
fueling

22. Fueling Rules
1. Pull up close to the pump
2. Stay with the vehicle
3. Do not top off tank
4. Know where emergency shut off and
spill materials are located
5. Mobile fueling with secondary
containment and spill kit in place

23. Equipment Wash Area Rules
1. Clean equipment in designated areas only
– Pre-wash equipment using dry, mechanical
methods
– Sweep up and dispose of removed grass, dirt and
other debris
– Wet wash INDOORS only, if needed to complete
the job
2. Avoid detergents and other chemicals
3. Absolutely no engine cleaning, degreasing
or fluid removals
4. Clean up after yourself when finished

24. Spill Prevention and Response
• Contain the spill if safely possible
– Stop the release, if possible
– Locate spill kit
– Ensure access to water and sewers is blocked and isolate
area
• Call for help
– Call 9-1-1 to report spill and details
– Notify colleagues if needed
• Cleanup the spill
– AHERPS/EHS or DEM staff make contact and coordinate
response
– If directed to do so, clean up the spill (small quantity, indoors)
– Chemical Waste Team deployed if needed
– Additional reporting may be required

25. Waste Management
• Outdoor containers are potential sources of
pollutants to stormwater
• Waste and waste storage areas need special
attention
– Maintain common areas and practices for waste
collection and disposal
– Closed/covered except when adding/removing
– Regular inspection of containers and stockpiles
• Litter and debris contained
• Good condition and not leaking
– Hard surfaces to capture spills

26. Waste Management (Con’t)
• Some wastes further regulated
– Oily wastes,
– Special wastes: scrap metals, antifreeze, paint
waste, lamps, batteries, pesticides, Hg containing
items
– Hazardous wastes: paint wastes, thinners, ink
• Store indoors within bermed accumulation
area

27. BMPs
• Lowest cost way to reduce impact on
the environment are non-structural
• BMPs are the goal for each opportunity
– May or may not be permit driven
– Use the best practice available at the time,
revisit as time and money allow
– Periodic audits, ‘public’ feedback and
desire for growth opportunities may drive

28. Questions or Comments?
See something that’s not right?
• Ask Questions
• Talk to your manager
• Talk to EHS
Julianne Rantala
U Health and Safety
Environmental Health and Safety
jrantala@umn.edu, 6-7957