Cleanup & Remediation
Remediation can be defined as the cleanup, abatement or other method to contain or remove a hazardous substance or petroleum product from the environment. Cleanup and remediation become necessary if Recognized Environmental Conditions are identified in a Phase I Environmental Site Assessment and then pollutants are subsequently confirmed during a Phase II Contaminant Investigation. However cleanup may occur independently of the Phase I/II process if the nature and extent of the problem is well-understood or if the release of a hazardous substance or petroleum product has occurred suddenly such as in a failed fuel underground storage tank test or a spill from a 55-gallon chemical drum.
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Remedial Action Plan
Before remediation can be implemented, a Remedial Action Plan (RAP) is prepared and submitted to a regulatory agency for concurrence and approval.
The goal of the RAP is to identify and weigh reasonable alternatives:
- Timely and cost effective;
- Protective of life, health and the environment;
- Least burdensome
A site-specific Health and Safety Plan (HASP) is prepared for each RAP and put into effect for all tasks at the work site. Although the cleanup site may be as large as a former military base or as modest as a neighborhood gas station or dry cleaner, the anticipated end result is to obtain regulatory closure and receive a “No Further Action Letter.”
All cleanup and remediation activities at OGI Environmental are conducted by or under the direct supervision of Nevada Certified Environmental Managers as required by Nevada statute. OGI professional and technical support personnel have acquired extensive experience in soil and groundwater remediation. They have completed or have underway hundreds of investigations/remedial actions including the full range of site characterization, risk assessment, remediation system design and installation, system operations/maintenance, and monitoring. OGI combines technical expertise and creative remediation strategies with known treatment technologies to provide a variety of methods for resolving environmental contamination problems. Our cleanup plans and strategies are designed to meet regulatory, budgetary, and time constraints.
For a service station where gasoline-contaminated soil is present, a common cleanup scenario involves the excavation and disposal of petroleum-impacted soil at a licensed disposal or soil recycling facility where it is treated/cleaned and eventually used as landfill cover or road base.
Groundwater Remediation Techniques
- Groundwater pump-and-treat
- Surfactant enhanced aquifer remediation
- In-situ oxidation
- Physical separation
- Air stripping
- Carbon adsorption
- Air sparging
- Soil vapor extraction (SVE)
- Dual-phase or multi-phase extraction
- In-situ and ex-situ bioremediation
- Mycoremediation (fungus)
- Thermal oxidation
- Ex-situ thermal desorption
- Soil washing
- Natural attenuation and others.
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