Appendix H - Two Rivers Utilities Letter

Piedmont Lithium Carolinas, Inc. I Response to DEMLR Additional Information Request
Appendices
PIEDtA'ONT
LITHIUM
H
Appendix H: Two Rivers
Utilities Letter to Piedmont
Lithium

TWO RIVEs
S
UTILIS
We are TR U to our customers!
December 2, 2021
Malissa Gordon
Community & Government Relations Manager
Piedmont Lithium
32 North Main Street, Suite 100
Belmont, NC 28012
Subject: Sewer Availability - Piedmont Lithium Site — Gaston County
The proposed Piedmont Lithium site in Gaston County is within the service area of Two River
Utilities. Wastewater from the proposed site could be treated at the Long Creek WWTP (NPDES
9 NC0020184). The Long Greek WWTP has a permitted capacity of 16 MGD. The current
Average Daily Flow for the plant is 7.0 MGD. The allocated capacity is currently 9.6 MGD. The
long Creek WWTP has 6.4 MGD available capacity which could serve the site.
The Long Creek Wastewater Treatment Plant is an advanced biological nutrient removal treatment
facility and one of the most sophisticated treatment plants in North Carolina. Flow rates above
25,000 gal/day would require a wastewater discharge permit. The constituents from the proposed
wastewater discharge must be evaluated to determine what level of pretreatment may be needed.
The route to serve the site with sewer has not been determined at this time. Once the route and the
proposed discharge volumes are determined, the existing sewer system beyond the proposed
connection point will be evaluated to determine if any additional improvements would be required.
Piedmont Lithium may be required to participate in any needed sewer system improvements to
accommodate the additional flows from the site.
Please contact me at 704-866-6043 if you have any questions or need additional information.
Sincerely.
L� "
Michael W. Bynum,
Civil Engineer III
PC: Joe Albright, Director of Public Utilities
Stephanie Scheringer, Division Manager Wastewater Treatment
P. 0. Box 1748
Gastonia, N.C. 28053