NC0023442_Authorization to Construct_20151119

North Carolina Department of Environmental Quality
Pat McCrory Donald R. van der Vaart
Governor Secretary
November 19, 2015
Mr. Bill Kopp
Planet Manager
Boise Cascade Wood Products, LLC
306 Corinth Road
Moncure,NC 27559
Subject: NPDES Permit Application(Authorization to Construct)
Permit NC0023442
Moncure Plywood
Chatham County
Dear Mr. Kopp:
The Division acknowledged the receipt of your October 30, 2015 NPDES Permit application in
a permit renewal letter issued November 13, 2015. Upon closer inspection, the intent of this application
was to request Authorization to Construct for a new treatment facility under the facility existing NPDES
permit. Your consultant, MacConnell & Associates, P.C., was contacted and advised that submittal of a
separate Authorization to Construct application was required.
Based on the documentation provided,the proposed plan was to installed new treatment capacity
in two phases, and maintain the existing lagoonsystem as a backup treatment system. With the
installation of a new domestic treatment facility your NPDES permits must reflect at a minimum federal
secondary treatment limits which in this case means the permit's TSS limits will be modified to 30 mg/L
as a monthly average limit and 45 mg/L as a daily maximum limit. All other existing permits limits for
BOD, pH, Fecal Coliform and DO will not change. The new treatment facility design information
indicates the secondary treatment standard were applied so there is no issue with the design criterion.
The documentation also indicated the new treatment facility will use UV disinfection so the existing
Total Residual Chlorine limit will be reviewed.
However,the existing lagoon system does not qualify for meeting secondary treatment standards
and cannot be used as a backup. Once the new treatment facility discharge begins the lagoon system
must be permanently removed from domestic treatment service. This includes, but is not limited to,
removal of solids from lagoon, closure procedure, or repurposing. The changes to the lagoon system
must be shown in the Authorization to Construct documentation. Any questions about repurposing the
lagoon for stormwater use should be addressed to the Raleigh Regional Office.
Before the Division can proceed with your Authorization to Construct application, your NPDES
permit must be modified to show the applicable requirements. Since an expansion in treated domestic
flow is not required and the resulting modified permit limits will be more stringent the Division has
determined a minor permit modification is appropriate. The modified permit's flow limit will be based
1617 Mail Service Center,Raleigh,North Carolina 27699-1617
Location.512 N.Salisbury St.Raleigh,North Carolina 27604
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An Equal Opportunity\Affirmative Action Employer

Mr. Bill Kopp, Plant Manager
November 19, 2015
Page 2 of 2
on the actual design flow capacity installed, which at this point is 4,000 GPD. What is the purpose of
two phases? Can 8,000 GPD be installed now? Please advise the Division on the final design so the
NPDES permit modification can be issued.
If you have any questions in regards to the NPDES modification or Authorization to Construct
process,please call Ron Berry at [phone] or by email at [e-mail].
Sincerely,
Ron Berry, Environmental Engineer
Division of Water Resources,NCDEQ
Cc: Gary MacConnell, PE
MacConnell &Associates, P.C.
1903 N. Harrison Ave, Suite 101
Cary, NC
Raleigh Regional Office/Water Quality Programs
NPDES File
Central Files