Phase 2 Environmental Site Assessment Cost

A Phase 2 Environmental Site Assessment, also written as a Phase II ESA, typically costs between $5,000 and $30,000 or more. The price depends on how many samples are collected, what contaminants are being tested, whether monitoring wells are needed, and how complex the site conditions are. Most standard Phase 2 assessments for commercial properties fall in the $8,000 to $20,000 range.

If your Phase 1 ESA identified Recognized Environmental Conditions, budgeting for a Phase 2 early in the transaction helps you avoid delays at closing.

Average Phase 2 ESA Cost by Scope

Complex sites with multiple contaminants, deep groundwater, or regulatory agency oversight can exceed $30,000. Sites requiring multiple rounds of sampling over time will incur additional costs for each mobilization.

Factors That Affect Phase 2 Pricing

Number of Borings

Each soil boring requires equipment mobilization, drilling, sample collection, and backfilling. More borings mean more field time and more laboratory analyses. A limited scope might include 3 to 5 borings, while a comprehensive investigation could require 15 or more.

Boring Depth

Shallow borings (5 to 15 feet) are less expensive than deep borings that need to reach groundwater or investigate deeper soil layers. Sites with deep water tables or thick contamination zones require deeper drilling equipment and more time.

Groundwater Monitoring Wells

If groundwater sampling is needed, monitoring wells must be installed. Each well costs $1,500 to $5,000 to install depending on depth, diameter, and materials. Well development, sampling, and eventual decommissioning add to the cost.

Types of Contaminants

The laboratory analyses required depend on the suspected contaminants. Basic petroleum hydrocarbon panels cost less than expanded analyses for volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), metals, pesticides, or PFAS. PFAS testing in particular has become more expensive due to low detection limits and specialized analytical methods.

Laboratory Costs

Each sample analyzed by the laboratory carries a per-sample cost that varies by the analytical method. A single soil sample analyzed for a standard petroleum panel may cost $100 to $200. The same sample analyzed for a full VOC/SVOC/metals/pesticide panel could cost $500 to $800. PFAS analysis can cost $300 to $500 per sample.

Regulatory Oversight

If the Phase 2 is being conducted under a state voluntary cleanup program, brownfield program, or regulatory enforcement action, there may be additional costs for agency review, oversight fees, and compliance with specific state sampling requirements.

Site Access and Conditions

Sites with limited access (active businesses, paved surfaces, interior sampling locations) require specialized equipment and more time. Traffic control, concrete coring, and interior drilling add to mobilization costs.

What Is Included in Phase 2 Pricing

A standard Phase 2 ESA quote should include:

• Sampling plan development based on Phase 1 findings
• Utility clearance and underground utility marking
• Field mobilization, drilling, and sample collection
• Sample handling, preservation, and chain-of-custody documentation
• Laboratory analysis at an accredited laboratory
• Data evaluation and comparison to regulatory screening levels
• Written report with findings, conclusions, and recommendations
• Senior review by a qualified environmental professional

What Could Add to Phase 2 Costs

Several factors can increase costs beyond the initial quote:

• Additional sampling rounds. If initial results are inconclusive or contamination extends beyond the original sampling area, additional mobilizations and lab work may be needed.
• Delineation sampling. Once contamination is confirmed, additional borings may be needed to define the horizontal and vertical extent of the contamination plume.
• Regulatory correspondence. If the state environmental agency requires review and approval of sampling plans or reports, the environmental firm's time for agency correspondence adds to the cost.
• Remediation planning. If contamination is confirmed, the firm may prepare a remedial action plan or feasibility study as a separate deliverable.
• Investigation-derived waste disposal. Contaminated soil cuttings, purge water, and other waste generated during sampling must be properly disposed of, which may incur disposal fees.

Phase 1 vs Phase 2 Cost Comparison

Phase 2 assessments cost significantly more than Phase 1 assessments because they involve physical sampling, laboratory analysis, and potentially heavy equipment.

Not every Phase 1 leads to a Phase 2. Most commercial transactions are completed with a Phase 1 only. For Phase 1 pricing details, see our Phase 1 ESA cost guide. For a full comparison, see our Phase 1 vs Phase 2 guide.

Get Phase 2 ESA Quotes

ESAquotes connects property buyers, lenders, and developers with environmental professionals who perform Phase 2 ESAs nationwide. Submit your property details and Phase 1 findings to receive competitive quotes from licensed firms in your area.