Guide to Storage Tank Sampling Requirements for New Jersey Businesses
Understanding the environmental regulations surrounding storage tanks is critical for many New Jersey businesses operating at locations with current or historical fuel storage tanks. Aboveground storage tanks (ASTs) and underground storage tanks (USTs) that contain petroleum products like #2 fuel oil present potential environmental and health concerns that may trigger regulatory oversight.
The New Jersey Department of Environmental Protection (NJDEP) has established specific protocols for addressing these concerns. Licensed Site Remediation Professionals (LSRPs) are pivotal in assessing and remedying.
The Role of Licensed Site Remediation Professionals
LSRPs are the primary technical authority when evaluating potential contamination from storage tanks. These licensed professionals research applicable NJDEP regulations and guidance documents to determine appropriate sampling requirements. Their expertise allows them to assess site-specific factors and make informed decisions about necessary environmental investigations.
The LSRP program, established under the 2009 Site Remediation Reform Act (SRRA), fundamentally changed how site remediation is conducted in New Jersey. LSRPs are authorized to oversee remediation projects and issue Response Action Outcomes (RAOs), equivalent to “No Further Action” letters previously issued by the NJDEP.
Determining When Storage Tank Sampling Is Required
The decision to conduct environmental sampling around storage tanks is not universal but depends on several key factors:
1. Discharge History
The most significant consideration is whether there is evidence or documentation of a discharge from the storage tank. Any known release of petroleum products, even minor ones, typically triggers sampling requirements. Historical spill reports, environmental site assessments, and visual evidence of staining can all indicate past discharges.
2. Prior Sampling Data
If previous environmental assessments have been conducted at the site, the LSRP will review this data to understand existing contamination levels. Depending on the quality and comprehensiveness of prior sampling, additional investigation may or may not be necessary.
Consistent with the Technical Requirements for Site Remediation (N.J.A.C. 7:26E), LSRPs must evaluate whether existing data meets current standards for site characterization.
3. Tank Location and Site Hydrology
Another critical factor is the physical location of the storage tank relative to business operations. Tanks located upgradient of business areas (meaning groundwater flows from the tank location toward the business) present a higher potential risk than those located downgradient. The proximity of tanks to buildings, property boundaries, and sensitive receptors like water supply wells also affect sampling decisions.
4. Tank Status and Condition
Active tanks are subject to different regulatory requirements than abandoned or removed tanks. The Underground Storage Tank Rules (N.J.A.C. 7:14B) specifically outline requirements for tank closure, which typically include post-removal sampling. The physical condition of existing tanks, including age, construction materials, and the presence of leak detection systems, are also factors in the sampling determination.
Common Sampling Triggers
While each site requires individual assessment, several scenarios commonly trigger sampling requirements:
Tank Closure or Removal
When a UST is permanently closed or removed, the NJDEP requires post-closure sampling to verify no contamination. The Technical Requirements for Site Remediation specify sampling locations and parameters for tank closure, including soil samples from beneath the tank and around associated piping.
Confirmed Discharges
Any confirmed discharge from a storage tank must be reported to the NJDEP Hotline (1-877-WARNDEP) within specified timeframes. Once reported, a discharge investigation is required to delineate the nature and extent of contamination, following the Linear Construction Technical Guidance.
Property Transactions
Environmental due diligence during property transfers often triggers storage tank assessments. Phase I Environmental Site Assessments frequently identify storage tanks as Recognized Environmental Conditions (RECs), leading to Phase II investigations that include sampling.
Vapor Intrusion Concerns
When petroleum storage tanks are near occupied buildings, vapor intrusion becomes a significant concern. New Jersey’s Vapor Intrusion Technical Guidance outlines when sampling is required to assess the potential for petroleum vapors to migrate into indoor air.
Sampling Protocol and Analysis
When sampling is deemed necessary, specific protocols must be followed:
Soil Sampling
Soil samples are typically collected from areas most likely contaminated, including beneath tanks, around fill ports, and along piping runs. Depending on the stored product, samples are analyzed for total petroleum hydrocarbons (TPH), volatile organic compounds (VOCs), and semi-volatile organic compounds (SVOCs).
Groundwater Sampling
If soil contamination extends to the water table or there’s reason to believe groundwater has been impacted, temporary wells or permanent monitoring wells may be installed. These samples are analyzed for dissolved petroleum constituents and other parameters outlined in the Ground Water Technical Guidance.
Vapor Sampling
For sites with vapor intrusion concerns, soil gas, sub-slab vapor, or indoor air samples may be collected. These samples help determine whether volatile contaminants from storage tanks are migrating into occupied spaces.
Risk-Based Decision Making
The NJDEP employs a risk-based approach to site remediation, meaning sampling requirements are often tied to potential exposure pathways and receptors. The two most common risk scenarios that trigger sampling include:
Vapor Intrusion Risk
Volatile compounds from petroleum releases can migrate through soil and into buildings, potentially causing indoor air quality issues. The proximity of tanks to structures, soil type, and depth to groundwater all influence this risk and the associated sampling requirements.
Direct Contact Risk
Contaminated soil or groundwater can pose risks through direct contact. Business operations involving excavation, landscaping, or other soil disturbance may increase exposure potential and necessitate sampling to evaluate safety concerns.
Regulatory Framework and Compliance
New Jersey’s regulatory framework for storage tanks and site remediation includes several key components:
- Underground Storage Tank Rules (N.J.A.C. 7:14B): Governs registration, operation, and closure of USTs
- Technical Requirements for Site Remediation (N.J.A.C. 7:26E): Outlines investigation and remediation procedures
- Heating Oil Tank System Remediation Rules (N.J.A.C. 7:26F): Specific to heating oil tanks
- Spill Compensation and Control Act: Establishes liability for discharges
LSRPs must navigate this complex regulatory landscape when determining sampling requirements for specific sites.
Navigating Storage Tank Sampling Regulations: Finding the Balance Between Risk Management and Compliance
Understanding potential sampling requirements is an essential aspect of environmental compliance and risk management for New Jersey businesses operating at locations with current or former storage tanks. While not all tanks necessitate sampling, factors such as discharge history, location, and potential exposure pathways significantly influence these determinations.
The expertise of Licensed Site Remediation Professionals is essential in this process. By thoroughly assessing site conditions and regulatory requirements, LSRPs help businesses navigate potential environmental liabilities while ensuring public health and environmental protection. Ultimately, sampling decisions are made case-by-case to identify and address real risks while avoiding unnecessary investigations where contamination is unlikely.
Businesses concerned about potential storage tank issues should consult an LSRP early in their planning process to understand site-specific requirements and develop appropriate compliance strategies.
To learn more about storage tank sampling requirements, regulations, and services, contact All American Environmental today.
