NCG030085_Tier 3 Responce Notification_20240424

Peterson, Kathryn S
From: Kedenburg, Michael (164) <[e-mail]>
Sent: Wednesday, April 24, 2024 1:26 PM
To: Eplin, Jerry W; Peterson, Kathryn S
Subject: [External] Tier 3 Status, TSS - Daimler Mt Holly
Attachments: Tier 3 Notification 3.15.2024.docx; SW Tier 3 Response Inspection for 3.15.2024
exceedance.docx
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Mr. Eplin and Ms. Peterson,
Daimler—Mount Holly(COC NGG030085)would like to notify your office of the Tier status (Tier 3)for the facility as
required by Part E of the NCG030000 General Permit—see attached notification. If you would like a hardcopy of this
notification to be placed in the mail for you, please let us know. If you have any questions, please contact us.
Michael Kedenburg, PG
Environmental Sustainability Engineer
Daimler Truck North America
Mount Holly TMP
1800 North Main Street
Mount Holly, NC 28120
[e-mail]
Office: 704-822-7034
Cell: 704-675-1385
If you are not the addressee, please inform us immediately that you have received this e-mail by mistake, and delete it.
We thank you for your support.

Stormwater Management Inspection Report (Tier Response)
Facility DAIMLER TRUCKS — MOUNT HOLLY
Parameter Exceedance TSS SDO 001
Date of Sample 3/15/2024 Date Received from Lab 3/25/2024
Date NC DEQ Notified 4/24/24 Notification Method Email
Benchmark 100 mg/I Lab Result 120 mg/I
Date/Time of SW Inspection 4/19/24 1:00pm —2:30pm Weather during Inspection Clear, 80'
Inspector(s) Michael Kedenburg (Daimler MTH)
Area(s) Inspected Drainage Area for SDO where industrial activity occurs: Tank Farm, Tire Shop, CRC, Dyno 2
Area(s) of Concern POTENTIAL SOURCE POTENTIAL IMPROVEMENTS*
Oil spill cleanup Recent spot cleaning of oil spills in the CRC 1. Retrain shop floor and janitorial staff on
and Dyno areas have involved excessive proper removal of oil absorbent
amounts of oil absorbent. This fine-grained 2. Increase inspection frequency of this
material is not always swept up in a timely area, particularly before large rain
fashion, likely contributing to higher events
suspended solids in the stormwater
Area(s) of Concern POTENTIAL SOURCE POTENTIAL IMPROVEMENTS
Recently repaired asphalt Recent asphalt repairs in this area have 1. Coordinate with the facilities
generated a large amount of debris in this department regarding proper cleanup
area, which likely contributed to higher practices after asphalt repair work is
suspended solids in the stormwater completed
*Source controls, operational controls or physical improvements

4/24/24
Jerry Eplin
Assistant Regional Engineer, Land Quality Section
Energy,Mineral, and Land Resources
North Carolina Department of Environmental Quality
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville,North Carolina 28115
[e-mail]
Subject: Tier Status Notification
Daimler Trucks North America,LLC—Mount Holly Truck Plant
Certificate of Coverage NCG030085
Dear Mr. Eplin,
Daimler Trucks North America, LLC — Mount Holly Truck Plant (the Facility), is providing
notification, as required by NCG030000 Part E, to update you on the Tier Status of Outfall 001
based on the latest sampling event. The Facility has become aware of its Tier status changes and
continuances for samples collected on March 15, 2024 (results received by the Facility on April
11, 2024). These changes and continuances are as follows:
Tier 3 entrance due to benchmark exceedances of total suspended solids (TSS)at Outfall 001
The March 15'' sampling event indicates a Tier 3 benchmark exceedance for TSS at Outfall 001.
The following table provides results of the 4 exceedances of TSS at this outfall:
TSS benchmark= 100 mg/1
Feb- Aug- Jan- March-
Month 23 23 24 24
Outfall 001 140 108 124 120
The Facility has initiated Tier 3 response for the benchmark exceedances. If you have any
questions, please contact Michael Kedenburg with DTNA-Mount Holly at
[e-mail].
Sincerely,