We assess on-site and nearby hazards—landfills, dry cleaners, USTs—to develop mitigation strategies and ensure regulatory compliance.

D3G guides you through the HUD environmental review process, ensuring smooth Part 50/58 compliance and seamless HEROS submissions.

We help navigate strategies to reduce climate impact, integrating resilience measures into preservation and new construction projects.

D3G evaluates floodplain and wetland risks, ensuring compliance with environmental regulations and sustainable project planning.

Environmental Consulting Services

Expert Guidance for Every Phase of Your Project

D3G’s environmental consulting services focus on identifying and mitigating environmental risks associated with property development and management. We conduct thorough environmental reviews and assessments to ensure compliance with federal, state, and local regulations, facilitating smoother project approvals and sustainable development practices.

  • Ongoing calls and project support as your RFP/design/consultant team progresses.
  • Professional review and opinion letters tailored to your specific environmental challenges.
  • Hourly consulting for targeted issues such as contamination, flood risk, or noise concerns.
  • Second opinions and creative solutions to streamline your project’s environmental compliance.

CONTAMINATION

Contamination & Mitigation Strategy

D3G’s environmental consultants specialize in identifying and managing contamination risks through Phase I, II, and III Environmental Site Assessments (ESAs). Phase II ESAs focus on confirming and characterizing subsurface contamination through soil, groundwater, and vapor sampling. When contamination is found, we develop mitigation and remediation strategies that align with EPA, HUD, and ASTM standards—ensuring regulatory compliance at every level. Our team frequently supports troubled projects, particularly under HUD’s MAP Guide, helping to navigate complex environmental hurdles, reduce liability, and avoid costly delays. Whether starting from scratch or stepping in mid-project, D3G leads with technical expertise and proven solutions.

NEPA

NEPA – Part 50/58 HEROS Submission

We ensure all projects are evaluated in accordance with NEPA and HUD-specific regulatory requirements for the various levels of Environmental Review, including Exempt activities, Categorical Excluded Not Subject To (CENST) activities, Categorical Excluded Subject To (CEST) activities, and Environmental Assessments (EAs). This ensures your project meets all necessary requirements outlined in 24 CFR Part 50 and/or 24 CFR Part 58.

We provide complete NEPA compliance services, including Environmental Assessments (EAs), Categorical Exclusions (CEST), and Environmental Impact Statements (EIS), ensuring your project meets all Part 50 and Part 58 requirements.

Climate

Climate Resilience

Climate resilience is critical for the long-term success of any development project, especially in areas prone to flooding, extreme weather events, or sea-level rise. Our consultants provide climate risk assessments that evaluate floodplain vulnerabilities, storm surge risks, and heat island effects, helping you design resilient properties that withstand future climate challenges. We focus on sustainable development strategies and ensure compliance with federal sustainability initiatives. 

FLOODPLAINS & WETLANDS

Floodplain & Wetland Consulting

We ensure projects comply with HUD’s floodplain and wetland regulations outlined in 24 CFR Part 55, as mandated by Executive Orders 11988 and 11990. This includes developing project-specific mitigation efforts and site design alterations as needed. By consulting early in the planning process, we help identify the impacts that HUD-specific floodproofing and avoidance/minimization measures may have on the overall project timeline. D3G’s environmental team includes Certified Floodplain Managers (CFMs) who are involved from early project design discussions to the completion of the 8-step process and project approval, as necessary.