Most upstream and midstream oil and gas operators are well aware of the air permitting, emissions reporting, and recordkeeping requirements that apply to their operations. However, air compliance is only one part of the environmental compliance picture. Waste handling, produced water management, stormwater and wastewater discharges, chemical storage, spill response, injection well operations, and state-specific oilfield requirements each carry their own obligations and potential compliance risks.
This article focuses on the compliance programs beyond air that may receive less structured attention, even though they can create significant permitting, reporting, recordkeeping, and operational risk. A complete environmental compliance program should address these requirements alongside the facility’s air obligations.
Understanding the RCRA E&P Exemption and Its Limits
Certain exploration and production (E&P) wastes are exempt from federal hazardous waste regulation under RCRA Subtitle C. That exemption is not a blanket clearance from environmental compliance. For current guidance on how EPA evaluates E&P waste management, see EPA’s guidance on E&P waste management.
Operators are still required to evaluate whether individual waste streams qualify as E&P-exempt or non-exempt, manage used oil and universal waste in accordance with applicable standards, maintain disposal and transportation records, confirm that waste haulers and disposal facilities hold the proper authorizations, and respond appropriately to spills, releases, and impacted soils. Certain non-E&P wastes, including some service-related waste streams, may fall outside the exemption and should be evaluated separately.
The distinction between E&P-exempt and non-exempt waste is one of the most consequential determinations in oilfield waste management. Operators that generate and ship non-exempt hazardous wastes such as contaminated used oil, unused or discarded chemical products, compressor and equipment maintenance wastes, and spent solvents should pay particular attention to how those shipments are characterized, managed, and reported. This is especially important when hazardous waste is sent through a transfer facility, broker, consolidator, or similar intermediary rather than directly to the final treatment, storage, or disposal facility. Operators using these arrangements should be aware of EPA’s transition from management method code H141 to the new S-codes and should confirm that waste profiles, manifests, vendor instructions, and reporting systems are updated accordingly. For additional context, see EDGE’s recent article, EPA Hazardous Waste Reporting Update: Transition from H141 to New S-Codes.
Produced Water and Wastewater Management
Produced water is the largest-volume waste stream in oil and gas production and one of the most actively scrutinized by regulators. Compliance obligations vary by activity type, location, and disposal pathway.
Operators should evaluate requirements for produced water storage, reuse, recycling, and disposal; Class II injection well authorization under the UIC program; discharge permit applicability under the Clean Water Act; hydrostatic test water management; gas plant wastewater; and stormwater controls at production and midstream facilities. The applicable regulatory pathway depends on whether the activity involves upstream production, midstream gathering, processing, pipeline construction, terminal operations, or support functions. State rules may layer additional requirements on top of federal programs.
Chemical Management and EPCRA Reporting
Chemical management is an area where compliance gaps can develop without active monitoring. Operators should confirm that chemical inventories are current, that Safety Data Sheets (SDSs) are on file and accessible, that secondary containment is evaluated for storage areas, and that applicable federal reporting thresholds are being tracked.
EPCRA Tier II reporting applies to facilities that store hazardous chemicals in quantities above the threshold. Toxics Release Inventory (TRI) reporting applies to natural gas plants that meet the applicable chemical and activity thresholds. Spill reporting obligations under CERCLA, EPCRA Section 304, and state programs have their own triggers and timelines.
Facilities handling methanol, glycols, corrosion inhibitors, biocides, surfactants, acids, produced water treatment chemicals, fuels, lubricants, and other oilfield chemicals should confirm that reporting applicability is evaluated before deadlines arrive.
State-Specific Compliance Obligations
State requirements frequently drive compliance obligations that differ significantly from federal baselines. The following reflects key focus areas for operators in major producing states.
Texas
Operators should evaluate Railroad Commission waste management and disposal requirements, permitted hauler and receiver obligations, produced water recycling and pilot project authorizations, injection and disposal well requirements, spill response obligations, and TCEQ permitting for certain oil and gas wastewater discharges.
Oklahoma
Compliance attention should remain on Oklahoma Corporation Commission pollution abatement requirements, produced water and saltwater handling, disposal well records, remediation, spill response, and soil and water protection obligations.
Louisiana
Operators should evaluate Office of Conservation requirements for E&P waste storage, treatment, disposal, discharge limitations, groundwater protection, and oilfield site restoration.
New Mexico
Produced water, disposal wells, injection projects, recycling, surface restoration, and state oil conservation rules require careful review, particularly where produced water reuse or disposal capacity is part of the operating plan.
Colorado
Produced water recycling and reporting obligations, chemical disclosure requirements, PFAS restrictions, spill response, waste management, remediation documentation, and development plan requirements affecting water use and transportation should all be evaluated.
California
Operators should review CalGEM requirements for injection, produced water management, well stimulation, idle well testing, idle well management plans, plugging and abandonment, and coordination with water quality requirements for discharges and disposal.
Reviewing Compliance Beyond Air
A structured review of compliance obligations beyond air can help operators evaluate the programs most likely to create enforcement risk, transaction concerns, or operational delays. Key areas include:
- Waste classification and disposal practices
- Produced water storage, reuse, recycling, and disposal
- Stormwater and wastewater permitting applicability
- Chemical inventory and EPCRA Tier II reporting obligations
- TRI applicability for natural gas plants
- Spill prevention, response, and release reporting procedures
- State oilfield waste, remediation, and site restoration requirements
- Recordkeeping for waste haulers, disposal facilities, manifests, profiles, and analytical data
- Facility-specific review of upstream, midstream, and support operations to identify missing permits, waste profiles, water management requirements, chemical reporting obligations, and recordkeeping gaps
Identifying compliance issues internally and documenting corrective actions can help operators address potential gaps before they surface during inspections, transactions, or operational reviews. A proactive compliance program can provide meaningful value during inspections, transactions, and internal risk reviews.
How EDGE Can Help
EDGE Engineering & Science supports upstream and midstream operators with integrated environmental compliance services. In addition to our air permitting, emissions reporting, and air compliance capabilities, EDGE assists clients with waste and water applicability reviews, produced water and wastewater requirements, chemical inventory assessments, EPCRA and TRI reporting, state-specific oil and gas regulatory reviews, and corrective action planning. Learn more about our Compliance & Liability Management services.
For #FurtherInsight on managing oil and gas compliance requirements beyond air, contact EDGE Engineering & Science.
