Principals and Key Staff

  • Environmental and applied geology and hydrogeology
  • Multi-disciplinary project management
  • Environmental site assessment, surface and subsurface investigation, site remediation, plan and procedure development, bid preparation, permitting, and subcontractor selection
  • Experienced in areas contaminated with VOCs, fuel hydrocarbons, metals, PCBs, dioxins, and pesticides.
  • B.S., Geology; University of the Pacific, Stockton, California, 1994
  • Geochemistry of Hazardous Waste; UC Berkeley Extension, 1996
  • Fundamentals of Groundwater Hydrology; UC Berkeley Extension, 1997
  • GIS Short Course; UC Berkeley Extension, 2000
  • Monitored Natural Attenuation; UC Berkeley Extension, 2003
  • HBPP GET/RAD Worker Training
  • 40-hour SARA/OSHA Certified
  • 8‑hour SARA/OSHA Certified
  • SARA/OSHA Supervisor Training
  • Qualified SWPPP Practitioner (QSP) CASQA #21533

Erik Nielsen, PG, CHG

Environmental Services Principal

Erik has 30+ years of experience in environmental and applied geology and hydrogeology, working with federal, state, and local regulatory agencies. His experience includes project management (especially multi-disciplinary and large projects), subsurface investigation, site remediation, plan and procedure development, bid preparation, permitting, and subcontractor selection. He has prepared interpretive reports, preliminary plans, working drawings, construction documents, and cost estimates for assessment and remediation projects. His field experience includes excavation, drilling, soil and groundwater sampling, hydrogeologic interpretation, aquifer characterization, lithologic and geophysical logging, well design and installation, and stormwater compliance. He has worked in areas contaminated with VOCs, fuel hydrocarbons, metals, pesticides, radioactive materials, and explosives.  Erik has filled the role of Environmental Services Area Principal for many years, leading the transition from primarily underground storage tanks and landfill regulatory compliance to remediation coupled with environmental risk assessment and stormwater compliance.