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Home My WebLink AboutNCS000328_Staff Report_20190710NC Division of Energy, Mineral and Land Resources Review for Permit — NCS000328 Bestway South Facility Activities and Processes: • SIC Code: 2491— Wood Preserving • Bestway South is a lumber treating and dry kiln facility. It contains a treating plant with a 64-foot double door cylinder. It has three work tanks, CCA bulk storage tank enclosed in a blocked with sprinkler system installed. The drip pad is double lined and is fully self-contained with burms surrounding the treater. All chemical that drips from the treated lumber is drained back into the door pits where it is reused in the treating process. The water system used for the treating process has a check valve and a back -flow preventer system installed. The treating plant is covered by a steel building with gutters and is paved around it. All chemical tanks are double lined and can contain all the material in case of an accident. All hazardous waste generated is stored in 55-gallon drums and is removed by Terra First Inc. The treater and shop have spill containment kits for small and large spills. • There is a pond onsite that collects stormwater. The permittee indicated that there have been no discharges from the pond. Monitoring Information: Changes have been made to several monitoring parameters, including a change to two benchmarks. Copper benchmark is increased from .007 mg/I to .010 mg/I; 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.