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HomeMy WebLinkAboutNCG030706_Technical Assistance Inspection Report_20230106ROY 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 (704) 663-1699 or by e- mail at joseph.hoy@ncdenr.gov 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: 704-476-3625 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: 704-663-1699 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. Page 2 of 3 Permit: NGG030706 Owner - Facility: Greenheck Fan Corporation Inspection Date: 01/05/2023 Inspection Type :Technical Assistance Reason for Visit: Other Page 3 of 3