Managing Industrial Stormw ater In Minnesota For Aggregate and - - PowerPoint PPT Presentation

Managing Industrial Stormw ater In Minnesota

For Aggregate and Ready Mix Association of Minnesota

Cindi Kahrmann MPCA Industrial Stormwater Program Coordinator 651-757-2481

2

What is Stormw ater?

Stormw ater is site runoff or runon from:

• Rain
• Snow , sleet,

hail

• Snow melt

When contaminated with site materials, stormwater affects water quality

3

Who Must Apply for a Stormw ater Permit?

• Facilities with activities that fall into one of

ten categories, most with specific SIC codes – these are organized into 30 sectors

• Sector J: Mineral mining and

dressing

• Sector D: Asphalt paving and

roofing materials and lubricants

• Sector E: Glass, clay, cement,

concrete and gypsum products complete list in application instructions

• Examples from Aggregate & Ready Mix

Industry Sectors

4

Why Do We Care about Stormw ater?

• Processing the materials for these sectors may

produce sediment that is easily transportable by stormwater and is then carried into rivers and lakes

• Some of these particles also become suspended

in stormwater that is carried into rivers and lakes

• These particles accumulate and then affect fish

spawning areas and food source habitat

• These particles also can transport other

pollutants from small spills or from vehicles such as oil and grease or acid cleaning solutions

6

7

8

9

Industrial Stormw ater Work Group

• Aggregate and Ready Mix Association
• Aggregate Industries
• Salvage yards
• Auto recyclers
• Electrical companies
• Mining
• Petroleum refining
• Manufacturing
• Minnesota Chamber of Commerce
• Government agencies (MNDOT, MAC)
• Cities that receive industrial stormwater
• Consultants
• Environmental Group
• MPCA staff, supervisor, manager

10

Industrial Stormw ater Multi-Sector General Permit

Focus on sector specific requirements for stormwater management on a site through:

• Development of a Stormwater Pollution

Prevention Plan

• Implementation of Best Management

Practices

• Benchmark monitoring for stormwater

discharges — this is new

11

What is Required?

• A Stormwater Pollution Prevention Plan

(SWPPP) that includes Best Management Practices (BMPs) for managing industrial materials and activities

• Eliminating or reducing stormwater contact

with potentially polluting materials and/or treating stormwater

• Monitoring stormwater discharges four times

in first year, passing benchmarks within three years -- this is new

12

Sector Specific Requirements

Each sector included in the permit would have specific requirements for:

• What pollutants to monitor for and how often
• Sector specific benchmarks to compare

monitoring results against

• Some Best Management Practices may be

specified

• Only a few sectors are expected to have

effluent limitations

• If you have industrial activity in more than
• ne sector, all requirements for those

sectors apply

13

What is a Benchmark? This is New

• A benchmark is an action level to compare

against the test result for monitoring

• Example: an industrial sector might be required

by the permit to monitor for Total Suspended Solids (TSS) and might have a benchmark of 100 milligrams / liter TSS

• The average of four test results from a facility in

the first year is 150 mg/liter TSS

• The facility would need to make management or

structural BMP changes, and test again, intending to pass the benchmark by end of year three

14

EPA Model Permit

• The federal Environmental Protection Agency

has a draft model permit

• The examples that follow are from the proposed

requirements for Sector J, Mineral Mining and Dressing, in EPA’s draft permit

• MPCA is evaluating these requirements and has

not yet determined how closely we will follow this in the Minnesota Multi- Sector General Permit

15

What’s Included in EPA Sector J

• Exploring for minerals (stone, sand, clay,

chemical and fertilizer minerals, nonmetallic minerals), developing mines, and the mining

• f these materials
• Discharge of stormwater, not including mine

drainage or process wastewater

• Dewatering composed entirely of stormwater
• r groundwater seepage from construction

sand and gravel, industrial sand, and crushed stone mining

16

BMPs Required for EPA Sector J

• Combination of sediment and erosion control

Best Management Practices (dikes, swales, curbs or berms, subsurface drains)

• Good Housekeeping: preventing litter,

debris and chemicals from coming into contact with stormwater

• Slowing down speed of stormwater runoff
• Sites more than 1 acre: sediment basins or

traps (silt fences, vegetated buffer strips) for down slope boundaries

• Temporary stabilization and permanent

stabilization where activities have stopped

17

18

19

Self-Inspections for EPA Sector J:

• At least once every 14 days and within 24

hours of the end of a storm event of 0.5 inches or more

• If the site is temporarily stabilized, and if

runoff is unlikely because of winter conditions, then once per month instead

• Include all disturbed areas and areas used

for storage, if exposed to stormwater

• Include discharge locations and vehicle

access locations

20

Monitoring: EPA Sector J

Benchmark Monitoring (4 times first year, repeat if cannot meet the benchmark)

• Total Suspended Solids (TSS) : 100 mg/l

average of 4 samples taken once per quarter or at least 2 weeks apart) Effluent Limit Monitoring (once per year) SIC (1422-29, 1442, 1446)

• TSS

25 mg/l monthly average 45 mg/l daily max

• pH

6-9

21

If the Monitoring Results are Higher than Benchmark

• Inspect, manage, maintain BMPs
• If the average of the four samples within a

year exceed the benchmark, then make changes to BMPs, document in the SWPPP, repeat the benchmark monitoring (4 samples taken once per quarter)

• If the benchmark is exceeded again, a

Nondegradation Analysis Report must be submitted and possibly an individual permit will be required

• Exceedance of an effluent limit requires

immediate corrective action and reporting

22

If Receiving Water is Listed as Impaired

• Monitoring for the pollutant of impairment is

required each year

• If monitoring results exceed a benchmark,

Nondegradation Report is not done but BMP management and monitoring continue until results are below the benchmark

• If a Total Maximum Daily Load (TMDL) has

been completed, follow the TMDL if it requires more than the general permit

23

How Do I Obtain the Permit?

• Apply now, if you currently do not have

coverage, and follow 2002 draft permit

• MPCA is currently drafting a revised permit

and may be ready to receive comments on the permit in 2008

• Apply for this revised permit when MPCA

announces the permit is ready for applications

• No permit fee for applying; there will be a

$400 annual fee, annual reports, inspections

• If your facility has an individual wastewater

treatment permit, these stormwater conditions will be included there

24

What if I Have the MNG 490000 permit?

• MPCA is considering taking all of the

Industrial Stormwater Multi-Sector General requirements for Sectors D, E, and J and combining them with MNG 490000 at a future date, possibly at the same time as the MSGP

• In the near term, MPCA may combine Sectors

D and or J with MNG490000, and add Sector E later

• Until then, industries would need to follow

the MSGP, when it is issued, for discharges that are not authorized by MNG 490000

25

Timeline

• Developing the permit, asking for input

now through June

• Industrial Stormwater Multi Sector

General Permit should be on public notice with a request for comments around June 2008

• Resolution of comments and issuance
• f the permit should be by the end of

2008

26

What is No Exposure?

All significant industrial materials and activities are protected from:

• Rain
• Snow
• Snowmelt
• Run-off

by a storm resistant shelter

27

What Advantage is Achieving No Exposure?

• Conditional exclusion from the industrial

stormwater permit

• No application fee, no annual fee, no annual

reports

• Stormwater contamination is avoided
• MPCA recommends three inspections per

year (must maintain condition of no exposure and apply every 5 years)

• MPCA recommends having, updating SWPPP

28

How Do I Obtain No Exposure Exclusion?

• All significant materials and industrial

activity protected from stormwater by storm resistant shelter

• Submit the permit application and

complete the No Exposure Certification Section every 5 years

• Submit a copy of the certification,

upon request, to the municipality in which the facility is located

29

Questions? General Cindi Kahrmann 651-296-7700 Technical, Sector Conditions Don Kriens 651-296-7734

THANK YOU!

30

31

What Are Industrial Materials and Activities?

MATERIALS

• Material and equipment

handling

• Machinery
• Raw materials
• By-products
• Waste products
• Intermediate and final

products

ACTIVITIES

• Storage
• Loading and unloading
• Transportation

32

What Are Significant Materials?

• Materials which have

pollution potential

• When determining

materials’ significance, physical and chemical characteristics should be considered

• Characteristics can

include solubility, transportability, and toxicity

EXAMPLES

• Raw materials
• Fuels
• Detergents, solvents
• Finished metallic

products

• Raw materials used

in food processing and production

• Hazardous

substances

• Waste products

33

What Industrial Materials and Activities Are Not Significant?

• Drums, barrels, and tanks sealed and free

from deterioration

• “Sealed” means no taps and valves
• Adequately maintained vehicles
• Free from leaks
• Completely covered and plugged dumpsters

with no deterioration

• Final or intermediate products that are

insoluble and intended for outdoor use

• Office buildings and parking lots without

industrial activity

34