NCG050428 Benchmark Exceedance_20240516

Peterson, Kathryn S
From: Peterson, Kathryn S
Sent: Monday, May 20, 2024 9:00 AM
To: McCormick, Kelly
Cc: Herold, Timothy; Hatley, Phillip; Draper, Todd; Mayse, Nate
Subject: Re: [External] NCG050428 Benchmark Exceedance Report
Hi Kelly,
DEQ has received your benchmark exceedance notification. Please continue to follow the Tier One
Response Procedures as listed in General Permit No. NCG050000 COC NCG050428.
Let us know if you need any technical assistance.
Best,
Kathryn
Kathryn Peterson
Assistant Regional Engineer
North Carolina Department of Environmental Quality
Division of Energy, Mineral and Land Resources
Office: [phone]
Mobile: [phone]
Email: [e-mail]
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville, NC 28115
D Q7
'I
-.E7
TH RROL Mr y V '
parIMOnt of Environmental Ou +
' r r
r ■ • �s
From: McCormick, Kelly<[e-mail]>
Sent:Thursday, May 16, 2024 5:47 PM
To: Peterson, Kathryn S<[e-mail]>
Cc: Herold,Timothy<[e-mail]>; Hatley, Phillip<[e-mail]>; Draper,Todd
<[e-mail]>; Mayse, Nate<[e-mail]>
Subject: [External] NCG050428 Benchmark Exceedance Report
1

You don't often get email from [e-mail] why this is important
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message
button located on your Outlook menu bar on the Home tab.
Dear DEMLR Regional Office:
The TruExterior Plant 2 located at 175 Circle M Drive in Salisbury, NC has exceeded two benchmark parameters
(TSS and COD)for a single time under NCG050428.
TSS for Outfall 001 sampled on March 27, 2024,was measured to be 1500 mg/L compared to the
benchmark of 100 mg/L.
COD for Outfall 001 sampled on March 27, 2024,was measured to be 189 mg/L compared to the
benchmark of 120 mg/L.
The facility is required to follow the Tier One response as documented in Table 18.4.1-1 of the NCG05 Permit.
• The email serves as the Notify Regional Office within two weeks with the exceedance date and values.
• The facility has reviewed the Outfall location (near the road ditch/culvert)and believes that stormwater
coming from another source upstream maybe the issue. In the next stormwater sampling event,the
facility plans to conduct samples before Outfall 001 as well as our normal Outfall 001 sample. This will
show how much pollution is running into the area prior to the facility outfall.
• All findings will be documented in the Stormwater Pollution Prevention Plan.
If you have any questions,concerns, or require additional information, please feel free to contact me.
Kelly McCormick) Corporate Environmental
Kmccormicka-westlake.com I Mobile [phone]
1000 Abernathy Road, Ste 195, Atlanta, GA 303281 www.westlake.com
Westlake
91,
The information transmitted,including any attachments,is intended only for the person or entity to which it is addressed and may contain confidential and/or
privileged material.Any review,retransmission,dissemination or other use of,or taking of any action in reliance upon,this information by persons or entities
other than the intended recipient is prohibited,and all liability arising therefrom is disclaimed.If you received this in error,please contact the sender and
delete the material from any computer.
2