NCG020160_TierI Notice Outfall 013tj_20230705

uulcnn
Materials Company
Via email
July 5, 2023
Tamera Eplin, PE
Regional Engineer, Land Quality Section
NCDEQ Winston Salem Regional Office
450 West Hanes Mill Road,Suite 300
Winston-Salem, NC 27105
RE: Vulcan Materials Company- 115 Quarry
COC No. NCG020160
Stormwater Outfall 013
Ms. Eplin:
In accordance with General Permit NO. NCG020000 Vulcan Materials Company, LLC (Vulcan) is
submitting notification within the two weeks of receipt (June 27, 2023) of analytical results indicating an
exceedance of a benchmark value as outlined in Part F Table 2 and Section F-5. In this case our Outfall
013 turbidity results indicated a result of 54.4 NTU.
Vulcan is in the process of implementing the Tier One response requirements for turbidity exceedance,
in as detailed in Part F,Table 5 of General Permit No. NCG020000. On July 5, 2023,Jamey Cranford of
Vulcan and myself attempted to identify and evaluate the possible causes of the benchmark
exceedance on June 20, 2023. From this evaluation,we believe that the source of the higher turbidity
may have been the result of debris and sediment build up. Runoff from this area is controlled through
the use of rock check dams, leading to the riser barrel Outfall. Vulcan will remove the debris and
sediment build up on rock check dams.The facility plans to take another sample during the next
qualified storm event.
Documentation of all responses and corrective actions performed in accordance with the Tier One
requirements for turbidity will be maintained with the facility's Stormwater Pollution Prevention Plan.
If you have any questions about the above information, please contact James Bear, Plant Supervisor at
828-406-1840 or me at 704-547-7076.
Sincerely,
Tony Johnson
Environmental Engineer
cc: James Bear
CHARLOTTE REGIONAL OFFICE—VULCAN CONSTRUCTION MATERIALS, L.L.C.
11020 David Taylor Drive,SUITE 400,CHARLOTTE, NC 28262,TELEPHONE [phone],FAX [phone]