NCS000324_Staff Report_20190709

NC Division of Energy, Mineral and Land Resources
Review for Permit — NCS000324
Consolidated Metco Inc.
Facility Activities and Processes:
• SIC Code: 3365 — Aluminum Foundries
• The facility performs aluminum casting for the trucking industry and machine assembly.
Monitoring Information:
Changes have been made to several monitoring parameters, including a change to two benchmarks.
Vehicle maintenance monitoring parameters have been revised as follows:
• Non -polar Oil and Grease [EPA Method 1664 (SGT-HEM)] replaces Oil and Grease/TPH. The
benchmark for Non -polar Oil and Grease using this method is 15 mg/L. This requirement
appears in all individual stormwater permits; however, it only applies to facilities that perform
onsite vehicle maintenance activities. If the facility begins vehicle maintenance during the
permit cycle, the requirements shall apply.
• pH monitoring is no longer required for discharges only associated with vehicle maintenance
activities.
No other monitoring parameters have been changed or added from the last permit term.