Environmental Compliance Review: Regulatory Frameworks and Risk Mitigation Strategies
A recent incident (March 2026) in Fort Mill, SC has caused much commotion, leading to closure of an elementary school and the response by emergency vehicles after a call to 911. South Carolina’s Department of Environmental Service had already been on site to investigate a previous spill before the March 5 news headlines were created.
It is not my place to relay the story as a news report. Rather, the goal in this article is to highlight important facts for EHS directors, facility managers, and Operation Officers. I will highlight regulatory bodies, risk management plans, and environmental compliance.
The Multi-Tiered Regulatory Landscape: Federal, State, and Local Jurisdictions
Establishing a robust environmental compliance framework is a fundamental prerequisite for industrial operational continuity and the maintenance of a "license" to operate. For facilities in South Carolina, a clear understanding of jurisdictional boundaries prevents regulatory gaps and ensures institutional oversight is redundant and comprehensive. Navigating this multi-tiered landscape requires an integrated approach that respects the distinct roles of federal, state, and local authorities.
The South Carolina Department of Environmental Services (formerly DHEC) oversees the state’s regulations, possessing the authority to issue air quality permits, industrial pretreatment permits, and National Pollutant Discharge Elimination System (NPDES) coverage. While the U.S. Environmental Protection Agency (EPA) maintains federal oversight through the Risk Management Program (RMP), the EPA National Response Center (NRC) must be notified immediately of any chemical releases exceeding the "Reportable Quantity" (RQ). Local governing bodies, such as York County, manages land use, zoning, and the Municipal Separate Storm Sewer System (MS4) program. The local government lacks the legal authority to issue or enforce environmental permits.
These authorities converge during facility-level emergencies. While SCDES serves in an advisory capacity and may issue "directives to cease operations" following a release, the local fire department and emergency management serve as the on-scene incident command. These local entities are the primary decision-makers regarding tactical public safety measures, including school closures and evacuations.
Risk Management Plan (RMP) Requirements and Technical Framework
An RMP is a strategic tool for identifying off-site consequences of accidental releases and ensuring operational longevity through rigorous hazard mitigation. For manufacturing facilities, the RMP is the primary mechanism for validating safety protocols before hazardous materials are introduced to the site.
Based on the presence of regulated substances such as Silane (a flammable gas) and Hydrochloric Acid (HCl), facilities are mandated to submit an RMP to the EPA. It is a critical technical nuance that while industrial sites like Silfab Solar handles Hydrogen Fluoride (HF), it is not subject to RMP requirements for that specific substance because it is stored at a concentration of 49%, falling just below the 50% regulatory threshold. Mandatory RMP components include:
Off-site Consequence Analysis: Modeling "worst-case" and "realistic" release scenarios to determine potential community impacts.
Accident Prevention and Emergency Response Plan: Site-specific strategies addressing unique chemical inventories.
Employee Training: Rigorous instruction on chemical hazards and operating procedures for personnel handling regulated substances.
Annual Drills and Coordination: Mandatory yearly exercises performed with local emergency response agencies.
Coordinating these plans with local responders prior to bringing chemicals on-site is a strategic necessity. Proactive engagement ensures that incident command has the data required to determine if personal protective equipment (PPE) is necessary or if public notification is required, thereby mitigating the risk of community distrust following an incident.
Integrated Water Management: Stormwater and Wastewater Compliance
Stormwater prevention and wastewater management are critical to the ecological health of South Carolina’s watersheds. Compliance requires a dual-track approach satisfying local runoff mandates and state-level industrial discharge requirements.
The MS4 program, managed by York County, focuses on land disturbance and sediment control. In contrast, the Industrial Pretreatment and NPDES permits are managed by SCDES. As a "significant industrial user," a facility must pre-treat wastewater on-site before discharging into municipal systems, such as the City of Fort Mill’s. Crucially, the pretreatment system cannot be placed into operation until a final industrial discharge permit is issued by the City, and a registered engineer has certified that construction aligns with approved specifications.
A central requirement for water quality is the Best Management Practice (BMP) Plan, which must specify:
Identification of Spill Sources: A comprehensive list of all potential sources of leaks involving oils, hazardous, and toxic substances.
Methods of Containment: Physical and procedural barriers to prevent pollutant migration.
Training and Inspection: Schedules for personnel education and equipment security checks.
Emergency Response Measures: Protocols for addressing accidental discharges to surface waters.
Hazard Profile: Chemical Handling and Emergency Remediation
Manufacturing processes often involve corrosive materials that pose high-consequence risks to human health and material integrity. The following summarizes the hazard profiles for chemicals utilized in solar cell etching and texturing that Silfab reportedly spilled:
Chemical Property
Specific Hazards (Human/Material)
Neutralization/Cleaning Steps
Hydrofluoric Acid (HF)
HF is caustic and highly corrosive. It penetrates skin tissue to cause deep ulcers, and toxic fumes irritate lungs. Close contact to HF may cause life-threatening irregular heartbeats. When HF touches the skin, the area should be flushed with water for over15 mins. Once flushed apply magnesium or calcium solutions and seek immediate medical help for ECG monitoring or endoscopy.
Potassium Hydroxide (KOH)
KOH is an inorganic, highly corrosive solution. The compound readily reacts with various metallurgy causing material integrity failure. KOH is corrosive to all body tissues. When someone comes into contact KOH, they should immediate do a15-minute water flush of eyes/skin. In clinical settings, irrigation may need to continue for several days.
Remediation Protocol: In the event of exposure, immediate irrigation with water for at least 15 minutes is the priority. For HF, professional medical intervention is mandatory to monitor for systemic poisoning; activated charcoal is ineffective for acid poisoning. Clinical settings must utilize magnesium/calcium solutions to neutralize the acid and perform ECG monitoring to manage potential cardiac arrhythmias or blood pressure drops.
Spill Reporting Protocols and Disclosure Mandates
Transparency in reporting prevents regulatory "cease operations" orders. When a release exceeds the Reportable Quantity (RQ) and leaves the property, specific disclosure mandates are triggered.
Federal/State Notification: Immediate notification must be provided to the EPA National Response Center (NRC) and SCDES.
The 24-Hour "Upset" Rule: Under air permit conditions, any malfunction of air pollution control equipment (e.g., wet scrubbers) lasting more than one hour that results in emissions exceeding permit limits must be reported to SCDES within 24 hours.
Failure to adhere to these windows can lead to severe interventions. For example, following a Potassium Hydroxide (KOH) spill on March 3, 2026, and a subsequent Hydrofluoric acid (HF) leak just 48 hours later on March 5, 2026, SCDES issued a "directive to cease operations" to assess root causes and community risk.
Actionable Preparedness: 5 Strategic Steps for Manufacturing Sites
To transition from reactive crisis management to a proactive compliance culture, manufacturing sites should implement the following steps:
Execute Pre-operational Jurisdictional Coordination: Establish formal communication with local fire, EMS, and school district leadership before chemicals arrive. This ensures the RMP is a functional roadmap for local stakeholders. An overview of these steps should be included in the Stormwater Pollution Prevention Plan (SWPPP).
Implement Automated "Fail-Safe" Shutdown Protocols: Integrate automated systems that halt manufacturing if wet acid scrubbers fall outside established parameters for pH, liquid flow rate, and pressure drop.
Conduct Community and School-Inclusive Drills: Include nearby sensitive receptors, such as schools, like Flint Hill Elementary, in annual emergency exercises to build trust and prepare the "on-scene incident command."
Enforce Rigorous Third-Party Testing: Adhere to a strict testing schedule for air emissions and water discharge. These should be conducted by an independent firm and observed by state regulators. The air emissions should be completed within 45 days of reaching maximum production (or 180 days of start-up) and every two years thereafter. Water monitoring should be conducted every three years.
Standardize Enhanced SDS and BMP Training: Mandate Safety Data Sheet (SDS) and Best Management Practice (BMP) training for all personnel to ensure site-wide awareness of spill identification and containment.
Environmental compliance is not a static achievement but a continuous cycle of monitoring and engagement. SCDES will conduct unannounced inspections to verify that equipment, monitoring records, and reporting protocols remain in strict adherence to state and federal law.