D OTY & A SSOCIATES, LLC
   Consulting Engineers
   Golden, Colorado

Home

Intro

Services

Site Investigation >

Env. Assessments >

Design >

Remediation >

Ground-Water Hydrology >

Surface Water Hydrology >

Ground-Water Monitoring >

Landfill Gas >

Landfill Volumes >

Environmental Plans >

Database Management >

GIS Programming >

Staff

Clients

News

FreeWare

Links

Contact us


Remediation


Starting the clay wall in Erie, Colorado Since 1986, we have designed, supervised the construction of and/or operated the following classes of remedial systems.

  • subsurface ground-water cut-off (french drain) with associated treatment or disposal of collected waters
  • soil removal
  • air-sparging
  • soil vapor extraction
  • dual-phase vapor extraction
  • ground water pump & treat (multiple wells with GAC or other treatment; one of these systems is fully automated with autodialer activation on alarm conditions)
  • bioventing
  • bio-stimulation
  • natural attenuation with and without monitoring

We have performed risk-based corrective action evaluations for petroleum hydrocarbon and other contaminants and we have a successful history of achieving site closure under Colorado's voluntary cleanup program.