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Remedial System Design, Permitting, and Installation

Underground storage tank (UST) site remediation is an area where Stratus shines. Our engineers and technical staff have been responsible for the system design, permitting, and installation of a vast number of remedial systems, using both conventional and non-conventional 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 provide construction specifications.

We are very familiar with Environmental Protection Agency, Department of Toxic Substances Control, California State Water Resources Control Board, and Regional Water Quality Control Board 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 numerous 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 cost.
  • Implementation – 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 extensive experience in designing and installing both simple and complex systems to remediate impact to the subsurface, including systems using telemetry technology. 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.

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

  • Soil Vapor Extraction (SVE) only systems, and SVE plus Air Sparge (AS) systems
  • SVE plus Pump and Treat (P&T) systems
  • Dual Phase Extraction (DPE) with groundwater treatment systems, and combination DPE-AS systems
  • Liquid Phase Hydrocarbon (LPH) recovery systems
  • Ozone Injection (OI) systems, and Direction Oxygen Injection (ISOC) systems
  • Combination of OI and P&T systems

Our groundwater treatment designs can include various treatment trains, such as: carbon adsorption, air stripping, and biological filters.

Stratus has also designed and implemented 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

Permitting is a critical step in any design process and our staff have comprehensive 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).

Stratus takes pride in the depth and breadth of knowledge our engineering and technical staff bring to remedial design, permitting, and implementation services. We are confident we can provide you with effective and cost efficient solutions to all of your environmental needs.