NCG030706_Technical Assistance Inspection Report_20230106

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
DOUGLAS R. ANSEL
Interim Director
Greenheck Group
Attention: Alex Roberts, Senior Director
1001 Commerce Center Drive
Shelby, North Carolina 28150
NORTH CAROLINA
EnWrwunental QualUy
January 6, 2023
RE: Stormwater Compliance Evaluation Inspection — Technical Assistance Visit
Greenheck Group
NPDES Certificate of Coverage — NCG030706
Cleveland County, North Carolina
Dear Mr. Roberts,
Enclosed please find a copy of the Compliance Evaluation Inspection Report for the Technical
Assistance visit conducted at the 1001 Commerce Center Drive facility on January 5, 2023. Please note
that in the report we provide a detailed summary of the visit. Should you have any questions regarding
this visit or other issues that may arise, please do not hesitate to contact us at [phone] or by e-
mail at [e-mail] or jerry.eplin a�ncdenr.gov.
JH/JWE
Enclosure
c: Laserfiche
Sincerely,
xvzl�*- Plv
Jerry W. Eplin, PE
Assistant Regional Engineer
Land Quality Section
North Carolina Department of Environmental Quality I Division of Energy, Mineral, and Land Resources
Mooresville Regional Office 1 610 East Center Avenue, Suite 3011 Mooresville, North Carolina 28115
704-663-1699

Compliance Inspection Report
Permit: NCG030706 Effective: 07/01/21 Expiration: 06/30/26 Owner: Greenheck Fan Corporation
SOC: Effective: Expiration: Facility: Greenheck Fan Corporation 2
County: Cleveland 1001 Commerce Center Dr
Region: Mooresville
Shelby NC 28150
Contact Person: Alex Roberts Title: Phone: [phone]
Directions to Facility:
From Shelby take Hwy 74 to Washburn Switch Rd. it is approx. 1.4 miles west of Hwy 226. Head north on Washburn Switch Rd
approx. 1.2 miles until Artee Rd, head approx. 0.3 miles west on Artee Rd until Commerce Center Dr. Facility is on left approx. 0.2 m
System Classifications: SWNC,
Primary ORC: Certification: Phone:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
Inspection Date: 01/05/2023 Entry Time 10:10AM Exit Time: 11:00AM
Primary Inspector: Jerry W Eplin Phone: [phone]
Secondary Inspector(s):
Joseph K Hoy
Reason for Inspection: Other Inspection Type: Technical Assistance
Permit Inspection Type: Metal Fabrication Stormwater Discharge COC
Facility Status: ❑ Compliant ❑ Not Compliant
Question Areas:
Storm Water
(See attachment summary)
Page 1 of 3

Permit: NCG030706 Owner - Facility: Greenheck Fan Corporation
Inspection Date: 01/05/2023 Inspection Type : Technical Assistance Reason for Visit: Other
Inspection Summary
On January 5, 2023, Joseph Hoy and Jerry Eplin visited the Greenheck facility located at 1001 Commerce Center Drive in
Shelby, NC. The purpose of the visit was to provide assistance in identifying potential sources of zinc in stormwater
samples. Shawn Cornett, Environmental Health and Safety Manager, and Alex Roberts, Senior Director, Manufacturing
Excellence, were met at the site. The facility manufactures HVAC equipment. The main raw material is galvanized metal.
All processing work (ex. punching) occurs inside the facility. No liquid storage tanks, silos, or bag houses exist at the
facility. External storage can include new and used pallets and dumpsters for wood and scrap metal — these are stored
exposed to stormwater. Some forklift traffic occurs outside the facility, to access pallet storage and dumpsters.
In general, the building exterior appeared clean and well maintained. No obvious signs of oil spillage or excessive tire traffic
were observed. Open top dumpsters containing scrap metal were observed. There was some metal spillage on the
concrete surface nearby the dumpsters. Also observed were miscellaneous metal and wooden parts stored outside. One
area on the southwest corner of the property contains piles of dirt, gravel, and signs of concrete washout activities.
Potential sources of zinc: Potential sources of zinc observed during the site tour included the following:
• apparent galvanized dock locks
• apparent galvanized rain gutters/downspouts
• two scrap metal dumpsters
• scrap metal spillage near the dumpsters
• miscellaneous metal storage outside the facility
• a galvanized chain link fence
• concrete washout activities
The flow direction for the rain gutters was not definitively known. The gutters discharge to a below -ground piping system.
We recommend that facility construction drawings be reviewed (if available) to determine flow paths and verify outfall areas
maps. This will also aid in deciding where to collect samples to screen for zinc. The scrap metal dumpsters currently are
located in the Outfall #3 drainage area, however, at least one scrap metal dumpster was previously located in the drainage
area for Outfall #2. The date at which the scrap metal dumpster was moved was not immediately known. The galvanized
chain link fence is located near Outfall #3.
As the facility prepares the Tier III Action Plan, we encourage you to consider collecting additional samples to narrow down
the source of the zinc. Potential sampling locations could include discharge from rain gutters, upgradient catch basin(s),
and discharge from dumpsters. Additionally, we would recommend that you consider cleaning up the gravel, dirt, concrete
washout area located on the southwestern corner of the site. The site is otherwise nicely landscaped except for this one
area. It is unknown whether this area could currently impact stormwater metals concentrations, however concrete washout
liquid may have the potential to do so. Reportedly, concrete washout can contain a number of metals and can also impact
suspended solids and pH. Future concrete washout activities, if any, should be handled in a manner that prevents any such
liquid from reaching stormwater.
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Permit: NGG030706 Owner - Facility: Greenheck Fan Corporation
Inspection Date: 01/05/2023 Inspection Type :Technical Assistance Reason for Visit: Other
Page 3 of 3