HomeMy WebLinkAboutNC0003425_Comments_20160906Strickland, Bev
From: Shell, Karrie-Jo <Shell.Karrie-Jo@epa.gov>
Sent: Tuesday, September 6, 2016 10:10 AM
To: Rodriguez, Teresa
Cc: Chernikov, Sergei
Subject: FW: request updated Roxboro permit application and flow schematic
Teresa,
Here are my preliminary comments on Roxboro, which I accidently sent to Sergei.
Karrie-Jo Robinson -Shell, P.E.
Environmental Engineer
US EPA Region 4
Water Protection Division
61 Forsyth Street
Atlanta, GA 30303
(404) 562-9308
From: Shell, Karrie-Jo
Sent: Tuesday, September 06, 2016 9:55 AM
To:'Chernikov, Sergei' <sergei.chernikov@ncdenr.gov>
Cc: Davis, Molly <Davis.Molly@epa.gov>; Diaz, Denisse <Diaz.Denisse@epa.gov>; Staples, Bridget
<Staples.Bridget@epa.gov>; Zimmer, Andrea <Zimmer.Andrea@epa.gov>; Schwartz, Paul <Schwartz.Paul @epa.gov>
Subject: request updated Roxboro permit application and flow schematic
Sergei,
The permit application for the Roxboro plant is dated Sept. 27, 2011
(http://edocs.deg.nc.gov/WaterResources/Browse.aspx?dbid=0&startid=245451&row=1&cr=1 ) and appears to contain
outdated information.
Please send me an updated flow schematic/water balance. According to 122.21(g)(2), the diagram should include
flows. The schematic should also include all the internal outfall included in the permit. I don't see internal outfalls 008,
009, 011, and 012. Outfall 001 is not identified either.
Please send a topo map that identifies the intake and outfall to receiving waterbody per 122.21(f)(7).
I will complete my review as soon as I get the updated topo map and water balance/flow schematic. However, based on
review so far, the emergency overflows from the FGD system need to comply with the new effluent guidelines for this
waste stream. Since the FGD overflows will go to the ash pond, instead of through the bioreactor, the permit should
ensure that the EG limits for the discharge from the ash pond will be met. Also, I noticed that the permit fact sheet
states that the facility uses dry ash handling for fly ash; however, the permit gives Duke until 11/1/2018 to meet the new
"no discharge" limits for this waste stream. Why?
Thanks again for the updated diagram and topo map.
Karrie-Jo Robinson -Shell, P.E.
Environmental Engineer
US EPA Region 4
Water Protection Division
61 Forsyth Street
Atlanta, GA 30303
(404) 562-9308