HomeMy WebLinkAboutNCG500604_Biocide Use_20211217DocuSign Envelope ID: DE987B0A-2DC6-474D-8285-657B1 D8B1 C41
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
S. DANIEL SMITH
Director
To:
NORTH CAROLINA
Environmental Quality
December 16, 2021
Patrick Carrube
Messer LLC — Midland
(via email: patrick.carrube@messer-us.com)
From: Cindy Moore
Aquatic Toxicity Branch
Subject: Biocide Use Review
Messer LLC — Midland
NPDES # NCG500604
Cabarrus County
Messer LLC — Midland has requested approval of the chemicals, Nalco 3DT230, Nalco 7408,
Nalco 90005, Nalco STABREX ST70. These products will be discharged from Outfall 001 and
into a UT to Muddy Creek.
A chronic multi -dilution Ceriodaphnia toxicity test collected and performed 10/12/2021 by ETT
Environmental, Inc. produced a chronic value result of >100% and indicates the use of these
products, at the stated dosage rate, will not cause toxic impacts to aquatic life in the receiving
stream, Muddy Creek. Therefore, the use of these products as an additive to the cooling tower
blowdown, non -contact cooling water, and occasional draining from other operational systems at
Messer LLC - Midland is acceptable.
If you have any questions or concerns, please contact Zach Thomas at (919) 743-8439 or
zachary.thomas@ncdenr.gov.
Sincerely,
�DocuSigned by:
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676E9F7 241C4B5.,.
Cindy Moore, Supervisor
Aquatic Toxicology Branch
Division of Water Resources, NCDEQ
cc: Charles Weaver, DWR (via email: charles.weaver@ncdenr.gov)
Wes Bell, MRO (via email: wes.bell@ncdenr.gov)
ATB Electronic File & Laserfiche
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North Carolina Department of Environmental Quality Division of Water Resources I Bio Lab
4401 Reedy Creek Road 11621 Mail Service Center I Raleigh, North Carolina 27699-1621
919.743.8400