NCG060230_Innospec Stormwater Benchmark Exceedance_20230727

Chandler, Jeffrey A
From:Eplin, Jerry W
Sent:Thursday, July 27, 2023 3:14 PM
To:Chandler, Jeffrey A
Subject:FW: \[External\] Innospec NCG060230 Stormwater benchmark exceedance
Please place in Laserfiche. Thanks.

From: Roxanne Fincher <[e-mail]>
Sent: Thursday, July 27, 2023 2:39 PM
To: Eplin, Jerry W <[e-mail]>
Cc: Allen Robey <[e-mail]>; Khan, Zahid <[e-mail]>
Subject: RE: \[External\] Innospec NCG060230 Stormwater benchmark exceedance

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Mr. Eplin,

We were not aware of any material that was released to the pond that would create such a low pH.

On 07/05/23, although the pond was not overflowing at the time, using a long handle dipper, samples were pulled at the
north and south sides of the pond and the pH results were within benchmark range (6.7 and 6.6 SU respectively). The
follow-up stormwater inspection conducted that same date did not indicate any sources for the low pH for the sample
obtained 6/20/23 either.

It is possible that there was a sampling error, although that does not seem likely based on interviews with our operator
who obtained the samples.

You are correct that this pond discharge does not normally exhibit low pH. We expect further sampling events to be
within the benchmark range.

Please advise if you need further information.

Regards,

Roxy Fincher
Senior SHE Officer NC
Innospec Performance Chemicals
[e-mail]
Tel: [phone]

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From: Eplin, Jerry W <[e-mail]>
Sent: Thursday, July 27, 2023 11:54 AM
To: Roxanne Fincher <[e-mail]>
Cc: Allen Robey <[e-mail]>; Khan, Zahid <[e-mail]>
Subject: RE: \[External\] Innospec NCG060230 Stormwater benchmark exceedance

Ms. Fincher:

DEQ has received your Tier 1 notification related to pH. Have you been able to identify a source of the low pH? I
reviewed the file on the facility, and I did not see a history of low pH readings. This appears to be an unusual
reading. A pH of 2.4 is very low for stormwater. Please provide additional information as it becomes available.

Thank you.

Regards,

Jerry W. Eplin, PE
Assistant Regional Engineer

North Carolina Department of Environmental Quality
Division of Energy, Mineral, and Land Resources

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From: Khan, Zahid <[e-mail]>
Sent: Thursday, July 27, 2023 11:38 AM
To: Roxanne Fincher <[e-mail]>; Eplin, Jerry W <[e-mail]>
Cc: Allen Robey <[e-mail]>
Subject: RE: \[External\] Innospec NCG060230 Stormwater benchmark exceedance

Jerry,
Please follow-up. Thanks

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Zahid Khan - [e-mail]
Regional Engineer
North Carolina Dept. of Environment & Natural Resources
Div. of Land Resources - Land Quality Section
610 E. Center Ave., Suite 301
Mooresville, NC 28115
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North Carolina Public Records Law and may be disclosed to third parties.
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From: Roxanne Fincher <[e-mail]>
Sent: Thursday, July 27, 2023 11:29 AM
To: Khan, Zahid <[e-mail]>
Cc: Allen Robey <[e-mail]>
Subject: \[External\] Innospec NCG060230 Stormwater benchmark exceedance

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button located on your Outlook menu bar on the Home tab.

Mr. Khan,

Our general stormwater permit number is NCG060230.

We exceeded the lower range of the pH benchmark for Outfall 001. This triggers a Tier One Tier Responses.

The sample was obtained 06/20/23 and the pH was 2.4 S.U.

If you have any questions or need more information, please feel free to contact me.

Regards,

Roxy Fincher
Senior SHE Officer NC
Innospec Performance Chemicals
[e-mail]
Tel: [phone]

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Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.

This message is private and confidential and may also be legally privileged. If you have received this message in error,
please email it back to the sender and immediately permanently delete it from your computer system. Please do not
read, print, re-transmit, store or act in reliance on it or any attachments. Virus checking of emails and attachments is the
responsibility of the recipient. Where permitted by law, Innospec may monitor email traffic data and also the content of
emails for the purposes of security and in order to prevent or detect unauthorized use of Innospec’s email system.

For information about how Innospec may collect, use and share your personal data please refer to Innospec's Third
Party Privacy Notice available on Innospec's website: https://innospec.com/about-us/supplier-relations/#third-party-
privacy-notice . Additional terms and conditions are also available on Innospec's website: https://innospec.com/trading-
t-cs/ .
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