HSA Golden offers a broad range of environmental engineering and waste management consulting services worldwide. We are experts in the engineering of landfills and recycling facilities, and we help you generate energy both from waste and from renewable resources. We assess and remediate soil and groundwater contamination. We perform environmental compliance and due diligence work, including Phase I and Phase II Environmental Site Assessments (ESAs). We also provide expert witness services in support of environmental litigation. read full review »