NCG030078_Email RE Benchmark Exceedances_20220314

Georgoulias, Bethany
From: Nicole Johnston <[e-mail]>
Sent: Monday, March 14, 2022 4:21 PM
To: Georgoulias, Bethany
Cc: Khan, Zahid; Morman, Alaina; Carson, Brittany; Kay, Lily C; Graybeal, Chris
Subject: [External] Stormwater Exceedance for Copper, Zinc and Oil & Grease for CommScope,
Inc. - Catawba Facility for February 2022 eDMR (NCG030078)
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Bethany et al,
We are working on the benchmark exceedances for copper, zinc, and oil & grease as provided in the table below for the
following outfalls for CommScope, Inc. — Catawba Facility (NCG030078):
Outfall No.
Copper Result
(Benchmark is 0.010
mg/L)
Zinc Result
(Benchmark is 0.126
mg/L)
Oil & Grease Result
(Benchmark is 15
mg/L)
003
0.062
0.34
004
0.20
005
0.014
0.285
No sample — bottle
froze in refrigerator
006
0.14
16.9
009
0.014
No sample — bottle
froze in refrigerator
012
0.17
We are informing maintenance of corrective actions that need to be taken to resolve these exceedances including the
following specific steps:
1) All metal stored outside needs to be covered and needs to be stored away from any storm drains.
2) Any metal sitting near storm drains must be removed.
3) For any construction areas/sites, all dumpsters need to be covered (including any construction debris).
4) Certain outfalls have discharge pipes that have deteriorated due to erosion and rust; these need to be replaced.
5) Perform monthly regular sweeping of parking lots and surrounding areas to assist with keeping sediment and
zinc particulates out of the stormwater system.
6) Consider painting any galvanized metal surfaces that may contribute towards these exceedances. Galvanized
surfaces can include roofs, gutters, flashing, fencing, sidewalls, guard rails, downspouts, etc.
Nicole Johnston
336-366-0870 cell #