NCS000115 Review Document

NC Division of Energy, Mineral and Land Resources
Review of Permit Renewal — NCS000115
Novozymes North America
SIC 2869 — Industrial Inorganic Chemicals - Enzymes
Monitoring —The facility has been monitoring for BOD, COD, TSS, TKN, NO2/NO3, TP and pH.
Previous permit did have tier system (2 tiers)
o Since 2012 the facility has had three exceedances of BOD and COD and one TSS
exceedance. Had exceedances at each of their two outfalls, but not at the same event.
BOD and COD exceedances in consecutive events in 2016. Following increased
monitoring below benchmark.
o Other parameters — no benchmark exceedances.
o Maintain BOD, COD, TSS and pH in this permit.
o Tier structure adjusted to have the three levels in current permits.
o VM monitoring changed to be consistent with current permits.
o Parameter codes added to permit.
Buffalo Creek 28-22 in the Tar -Pamlico River Basin. 2014 Assessment Report shows no listing for
this stream segment other than the statewide Hg listing and this facility has no indication of Hg
source. Basin is NSW, but facility monitored for nutrient parameters since 2008 with no
benchmark exceedances. NSW TMDL does not set any specific requirements for these facilities
outside of new construction needing stormwater control through the local government and
protection of any onsite stream buffers.
NC National Heritage review — no record of any species or communities of concern within a one
mile radius. See attached letter.
RRO —Thad Valentine inspected the site on 3/8/2018. Based on their review no concerns were
indicated for issuance. Thad did raise the question of whether vehicle maintenance applied if
equipment maintenance was done outside. Provided response to Thad on this question. Facility
also asked about discharge to impaired waters. It is in Tar -Pam NSW so no additional
restrictions at this point given the measures already in place.