NCS000573_Email RE Tier and Parameters Question_20200109

Georgoulias, Bethany
From: Dishmon, Joyce Martin <[e-mail]>
Sent: Wednesday, January 8, 2020 1:56 PM
To: Georgoulias, Bethany
Subject: [External] RE: Tier Status - Individual Stormwater Permit
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Thank you Bethany for the quick response. I agree with the understanding and may have been trying to overthink the
process. Joyce
From: Georgoulias, Bethany <[e-mail]>
Sent: Wednesday, January 8, 2020 1:19 PM
To: Dishmon, Joyce Martin <Joyce.Dish [e-mail]>
Cc: Lucas, Annette <[e-mail]>
Subject: RE: Tier Status - Individual Stormwater Permit
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Happy New Year, Joyce!
My understanding is that Tier 2 applies for consecutive exceedances of the some parameter.
I looked at the Tier language in NCG03, which should be the same:
Tier Two
If: The first valid sampling results from two consecutive monitoring periods (omitting periods with no discharge)
are above the benchmark values, or outside of the benchmark range, for any specific parameter at a specific
discharge outfall;
The reference to "specific parameter" there is meant to prevent Tier 2 being triggered by two different parameters.
For this example, the outfall is in Tier 1 for TSS and now Tier 1 for Zinc, but not yet Tier 2.
Let me know if this language is consistent with the permit you are asking about. What facility is this in reference to, so I
can record my response in the records, in the event of future questions?
Regards,
Bethany
Bethany Georgoulias
Environmental Engineer
Stormwater Program, Division of Energy, Mineral, and Land Resources
N.C. Department of Environmental Quality
1

919 707 3641 office
bethany.georgoulias@ncdenngov
512 N. Salisbury Street, Raleigh, NC 27604 (location)
1612 Mail Service Center, Raleigh, NC 27699-1612 (mailing)
Website: http://deq.nc.gov/about/divisions/energy-mineral-land-resources/stormwater
From: Dishmon, Joyce Martin [mailto:[e-mail]]
Sent: Wednesday, January 8, 2020 11:11 AM
To: Georgoulias, Bethany<[e-mail]>
Subject: [External] Tier Status - Individual Stormwater Permit
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Bethany,
I hope you had a relaxing holiday. I have a question for industrial stormwater permits pertaining to determining Tiered
Status with exceedances of separate parameters. If an outfall is in Tier 1 status for TSS (with next 2 sampling events
below the benchmark) and the second sampling event has an exceedance for Zinc, would the outfall be in Tier 1 status
for TSS and Tier 1 status for Zinc or would the exceedances be cumulative and the outfall would be in Tier 2 status.
Thank you in advance for your assistance. Please let me know if you have questions or need additional information.
Regards,
Joyce Dishmon
Permitting and Compliance, Carolinas
Office: 336-623-0238
Cell: 336-394-5524
Email: [e-mail]