About Us-Image


Remedial System Design, Permitting, and Installation

Stratus has vast experience and specialization in UST site remediation, both with conventional and non-conventional remedial technologies. In the environmental industry there are two aspects to remedial design and implementation, 1) selection of a remedial technology that is suitable based on site specific contaminant, and hydrogeologic conditions, and 2) creating design drawings with necessary details for the selected technology in order to obtain building and discharge permits and construction. Stratus has engineers that are capable of both remedial technology design and execution.

We are very familiar with EPA, DTSC, SWRCB, and RWQCB guidelines (such as the Tri-Regional Board Guidelines and Guidelines for Investigation and Cleanup of MTBE and Other Ether-Based Oxygenates), and use them to prepare corrective action plans (CAP), remedial action plans (RAP), and final remedial action plans (FRP). Stratus engineers have completed the design and startup of soil and groundwater cleanup systems, waste reduction equipment, and emissions control systems.

The goals of a typical remedial design include:

  • Effectiveness – making sure the system will meet the cleanup goals, including costs.
  • Implementability – analyze each alternative for both short-term and long term implementability.
  • Efficiency – the system needs to operate in a manner that reaches the cleanup goals in the least amount of time, expending the least amount of money.
  • Flexibility – the system is adaptable and possibly expandable to account for unforeseen conditions and situations.

Stratus engineers have experience in designing and installing both simple and complex systems to remediate impact to the subsurface, including telemetry systems. A conceptual process instrumentation and control diagram is one of the first steps we undertake as part of remediation system design. The design package, including construction specifications, can be developed for in-house construction or for bidding to outside contractors. We can also provide the full range of engineering disciplines required to execute plans and specifications.

Stratus personnel have designed, installed, and operated numerous soil and groundwater remediation systems. Some of which are identified below:

  • SVE only systems, and SVE plus AS systems
  • SVE plus Pump and Treat (P&T) systems
  • DPE with groundwater treatment systems, and combination DPE-AS systems
  • LPH recovery systems
  • Ozone injection systems, and ISOC systems
  • Combination of Ozone and P&T systems

We have designed groundwater treatment systems with varied treatment trains, such as, carbon adsorption, air stripping, and biological filters.

Stratus has also designed and executed above-ground treatment alternatives for soil that include:

  • Aeration of soil, biofarming/bioremediation, thermal desorption
  • Incineration onsite in a rotary kiln or offsite incineration
  • Soil washing onsite/offsite
  • In situ bioremediation alternatives designed and overseen by Stratus include:
    Monitored natural attenuation
  • Bioventing
  • Hydrogen peroxide and ozone injection
  • Direct oxygen injection (ISOC)
  • Bioremediation using nutrients and oxygen release compound (ORC)
  • Hydrogen peroxide, nutrients, and microbes
  • Physical barriers and cut-off trenches

Stratus has experience obtaining all the necessary permits to install remediation systems, including air discharge permits, National Pollutant Discharge Elimination System (NPDES) permits, Waste Discharge Requirement (WDR) permits, discharge to sewer permits, building permits, and third party inspection and certification (e.g. CSA/UL).