Air Quality Services

We conduct stack and vent sampling for particulates, VOC’s and pollutants & Title V permitting services.


THG has extensive experience in the regulatory process for REACH - the Regulation for Registration, Evaluation, Authorization and Restriction of Chemicals, which governs the export of substances to the European Union (EU)

Safety/Industrial Hygiene

  • Safety Compliance Audits & Safety Program Audits
  • Industrial Hygiene Audits & Industrial Hygiene Programs

Commercial and Industrial Property Evaluation

THG conducts Phase I, Phase II, & Phase III Environmental Site assessments per ASTM guidelines.

Safety Training

  • Hazardous Waste Operations & Emergency Response
  • OSHA 10 hour & 30 hour General Industry Outreach Program and other Safety Programs

Remediation & Engineering Design

We conduct engineering design for turnkey environmental assessment and remediation projects, as well as specialty engineering requirements.

ISO 14001 Compliance

  • Initial Review
  • Environmental Policy
  • Plan Establishment
  • Evaluation of all Environmental Aspects
  • Objectives and Targets
  • Implementation
  • EMS Certification Leading to Registration

Brownfield Redevelopment

  • Regulatory / Consent Order Negotiations
  • Development of Cleanup Criteria
  • Risk based Closure Assessments
  • Technical Oversite & Review
  • Soil & Groundwater Investigations
  • Feasibility Studies and Remediation

Industrial & Solid Waste Management

  • Comprehensive solid waste plans and feasibility studies
  • In-plant audits
  • Training guidelines
  • Emergency Plans
  • Lab Packs
  • Permits


  • Decontamination And Decommissioning Projects
  • Radiological Environmental
  • Health & Safety Services