NCG030687_TIER I_20220317

NC Department of
Environmental Quality
Received
Date: 3/16/2022 MAR 17 2022
Winston-Salem
Facility:Altec Industries, INC, 200 Altec Way, Mount Airy, NC, 27030 Regional Office
Notification Type:Stormwater Tier One Response
Inspector:Tyler Nelson - EH&S Specialist, Sr. N CQ70`5 0 C36 7
Reason for Notification:The stormwater sample analysis for the compliance sample taken on February
22, 2022, revealed levels of copper at Outfall 001 that exceeded the State's benchmark value. Sample
analysis results showed copper at 0.0108 (J) mg/L, which exceeds the benchmark value of 0.010 mg/L.
Inspection Findings:The benchmark exceedance was observed in the sample taken from Outfall 001.
Outfall 001 is the facility's northernmost outfall that receives stormwater runoff from paved parking
areas. During the stormwater management inspection conducted on February 22, 2022,there were no
indications of potential or possible causes of the increased levels of copper observed in the sample
analysis.A follow-up stormwater management inspection that occurred after sample analysis results
were received on March 4, 2022 did not reveal any sources of copper that may have led to the
benchmark exceedance.
Response Actions:The facility currently stores raw materials such as carbon steel, stainless steel, and
aluminum in the courtyard that discharges to Outfall 001.The facility has made a concerted effort to
minimize the amount of uncovered, raw material stored outdoors in this location. In addition, the facility
has approved a project to cover the raw material storage area to prevent exposure to precipitation.
The facility will continue to conduct monthly stormwater management inspections to monitor possible
contamination sources. Stormwater management inspections include chemical container integrity,
secondary containment, waste and raw materials storage, signs of erosion,trash and debris, spill
prevention and response, non-stormwater discharge, and storm drain sediment filters.
Per permit requirements,the facility plans to conduct stormwater sampling from Outfall 001 during a
representative rain event in the second quarter of calendar year 2022. Required qualitative monitoring
will also be conducted during this sampling event as well.
Other Comments:The facility will continue to investigate possible causes of the copper benchmark
exceedance and implement corrective action through best management practices within the one-month
time frame required in the stormwater permit.
Should you have any questions, please contact me directly.
Thank you,
Tyler Nelson
EH&S Specialist, Sr.
[e-mail]
cell: 336-504-9464
office: 336-786-3435