NCGNE1618_Acceptance Letter (Signed)_20231106

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ROY COOPER
S,
Governor a;
FIIZABETH-S BISER
Secretary
WILLIAM E.TOBY VINSON,JR. NORTH CAROLINA
Interim Director Environmental Quality
November 6, 2023
Enzyvant Therapeutics, Inc.
Attn: Larry Weiner
2000 Centre Green Way
Cary, NC 27513
Subject: No Exposure Certification NCGNE1618
Enzyvant Therapeutics,Inc.
Wake County
Dear Larry Weiner:
The Division of Energy, Mineral and Land Resources (DEMLR) has reviewed your submittal of the No
Exposure Certification for Exclusion from NPDES Stormwater Permitting form. Based on your submittal
and signed certification of no exposure at the above referenced facility as well as observations made during
a site visit conducted by Thad Valentine with the Raleigh Regional Office on November 1�t 2023,the
Division is granting your conditional exclusion from permitting as provided for under 40 CFR 122.26(g),
which is incorporated by reference in North Carolina regulations.
Please note that by our acceptance of your No Exposure Certification,you are obligated to maintain no
exposure conditions at your facility.If conditions change such that your facility can no longer qualify for the
No Exposure Certification,you are obligated to immediately obtain NPDES permit coverage for your
stormwater discharge.Otherwise,the discharge becomes subject to enforcement as an un-permitted
discharge.You must self-re-certify annually that the No Exposure conditions are being met by completing
the Annual Self Re-Certification Form,which can be found at https://deq.nc.gov/about/divisions/energy-
mineral-land-resources/npdes-no-exposure.The completed form does not need to be submitted but shall
be kept onsite and made available upon request.
Your conditional exclusion from permitting does not affect your facility's legal requirements to obtain
environmental permits that maybe required under other federal,state, or local regulations or ordinances.
If you have any questions or need further information,please contact Brittany Cook at(919) 707-3648.
Sincerely,
Brittany Cook
NPDES General Permit Coordinator,Stormwater Program
Division of Energy, Mineral,and Land Resources
cc: Raleigh Regional Office/T.Valentine
North Carolina Department of Environmental Quality I Division of Energy,Mineral and Land Resources
_ 512 North Salisbury Street; 1612Mail Service Center I Raleigh,North Carolina 2 769 9-161 2
919.707.9200