D3G helps

D3G has accumulated a vast knowledge and experience in Environmental Site Assessments over it’s 25 years. With an understanding of industry standards and regulatory requirements, we make the process smooth and efficient. Our in-house subject matter experts and highly trained and qualified staff help you navigate the complex world of environmental assessments, along with any issues that arise therein. We take pride in producing quality reporting at competitive pricing, and unlike many of our competitors, provide our services and stand with you until the deal is complete.



Full service

With specialized subject matter experts and experienced inspection teams, D3G provides everything you need from the initial Environmental Review to UST removal.  From Radon testing to National Environmental Protection Agency (NEPA) consulting.  We are with you from concept to closing!

Contamination Experts

We tackle the most challenging projects across the country. We have successfully guided many property owners and lenders through the process of evaluating and mitigating risk. Our staff has experience in nearly 50 states obtaining No Further Action letters from local environmental authorities to ensure that your property is within full compliance.


D3G is often selected to pilot new or difficult environmental reporting platforms as the “industry experts.”  Most recently, HUD selected our firm to test the HUD Environmental Review Online System (HEROS).

we offer include…

Phase I ESA

Investigations identify recognized environmental conditions (RECs) as defined by ASTM E 1527-13. 

Components of an ESA include:
  • Identification of current and historical land usage
  • Comprehensive reconnaissance
  • Review of local, state, and federal regulatory records
  • Interviews with personnel familiar with site history
  • Preliminary field screening for hazardous substances and petroleum products.

Phase II ESA

Investigations confirm the presence or absence of hazardous materials, the extent of contamination, the liability associated with contamination, and provide a basis for remediation design. 

Common Phase II activites include:
  • Soil and Groundwater Investigations
  • Vapor Intrusion/Vapor Encroachment Assessments 
  • Petroleum Storage Tank Testing
  • Lead-Based Paint Studies
  • Asbestos-Containing Material Inspections
  • Moisture and Mold Evaluations
  • Environmental Remediation
  • Geophysical Services including Ground Penetrating Radar (GPR) and Ferromagnetic Technology surveys and analysis

HAZMAT Testing

Investigations confirm the presence or absence of hazardous materials, the extent of contamination, the liability associated with contamination, and provide a basis for remediation design. Common Phase II activities include

HAZMAT Testing includes
  • Asbestos sampling/testing
  • Lead-Based Paint (LBP) Inspections and risk assessments
  • Radon gas sampling/analysis
  • Lead-In-Water testing/analysis
  • Operations and Maintenance Plans (O&M Plans)

National Environmental Policy Act (NEPA) Compliance

D3G's experience with 24 CFR Part 50-58 and the National Environmental Policy Act (NEPA) on thousands of federally supported projects guarantees solutions to even the most complex problems. Our knowledge of Tax Credit Assistance Program (TCAP) NEPA compliance reports and HUD Form 4128 Environmental Assessment and Compliance Findings reports make our staff experts.

NEPA Compliance Includes:
  • Historical Preservation - SHPO Correspondence
  • Floodplain Management - Executive Order 11988
  • Wetlands Protection - Executive Order 11990
  • US Fish and Wildlife Service Correspondence 
  • Noise Assessments in accordance with HUD Noise Guidebook
  • Acceptable Separation Distance Evaluations
  • Coastal Zone Management Correspondence
  • Additional Nuisances and Hazards (fall zones, pipelines, etc).

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