NCG140514_NOI Application Cover Letter_20221103

hdrinc.com
November 3, 2022
Brittany Carson
North Carolina Department of Environmental Quality
Division of Energy, Mineral, and Land Resources
Stormwater Permitting
217 West Jones Street
Raleigh, NC 27603
Subject: Notice of Intent - Industrial Stormwater Permit NCG140000
Toyota Battery Manufacturing, Inc — Concrete Batch Plant
Randolph County, North Carolina
Dear Ms. Carson:
HDR Engineering, Inc of the Carolinas, on behalf of Toyota Battery Manufacturing, Inc.
(TBMNC), is submitting the attached Notice of Intent for coverage under Industrial
Stormwater Permit NCG140000 for a temporary concrete batch plant in Liberty, Randolph
County, North Carolina. The concrete batch plant is associated with construction activities
located within the Toyota Battery Manufacturing facility site. Accompanying this letter are
attachments including the Notice of Intent (NOI), site plans, map, and additional details
regarding the batch plant operations.
The concrete batch plant is located on an approximately 5-acre area of the overall TBMNC
site. This area has an existing NCG010000 Permit for General Construction, RANDO-2022-
027 related to the mass grading occurring on the site as well as an NCGO10000 Permit for
the building phase of construction, RANDO-2022-031.
The concrete batch plant is operated by Chandler Concrete. The plant is an open-air facility
except for the concrete batching process, which is performed in enclosed silos and bins with
a baghouse for dust collection. As designed, the batch plant will not generate process water.
The concrete wash down area is the area where trucks are hosed off and where the backs
of trucks, chutes and hoppers are rinsed, as depicted in the attachments. There are two
large roll -off containers at this location for the washout water to be captured/contained.
These containers are lined to prevent the wash water from leaving the area. The containers
are owned by GFL Environmental from Jamestown, North Carolina who takes the full
containers of washout water to their construction landfill. The washout area is located within
the limits of disturbance authorized by RANDO-2022-
555 Fayetteville Street Suite 900 Raleigh, NC 27601-3034
[phone]

Aggregate materials associated with the concrete batch plant include sand and stone that
are in stockpiles. These stockpiles are exposed to the elements but are pre -washed prior to
entering the site and are kept in containment areas. Cement and flyash are brought to the
site by tankers and kept in a silo that is enclosed. Water for the concrete mix is from a well
onsite, which is transferred to four water holding tanks. There are two sealed containers
that are used to hold Admix. These containers are watertight and have an additional liner
and berms as secondary containment measures to ensure no risk of loss of materials or
exposure to precipitation. There is an emergency generator located on the site for powering
the batch plant; primary power is provided by electrical service. The 225-gallon generator
is located in a protected area and has an integrated spill containment system. Additional
supporting information regarding the concrete batch plant can be found in the attachments.
Thank you for your assistance with this permit. If you have any questions or need additional
information, please contact me at [phone] or [e-mail].
Respectfully,
HDR Engineering, Inc. of the Carolinas
Vickie Miller
Sr. Project Manager
Attachments: NCG140000 Notice of Intent
Batch Plant Drawings
Batch Plant Operations
USGS Map
Two (2) Site Diagrams
cc: Bethany Georgoulias, NCDEQ
David Lambert, NCDEQ
Sam Burton, Toyota
Becky Bright, Toyota