ABSTRACT
In selected circumstances where geological and hydrological conditions are favorable, a “no-action remediation” may be considered the appropriate alternative to the cleanup of petroleum contaminated soils. This chapter presents the rationale for leaving some petroleum contaminated soil in place and untreated, based on the understanding of site conditions and potential impacts as drawn from environmental investigations performed at the site. A keeping with a policy of active remediation at the time of tank removal, the decision was made to excavate all affected soils to the maximum practical depth. No additional excavation was performed in the eastern end, where hydrocarbons had not been detected in the soils. From a timing perspective, when this decision by the agency was received, the new tank installation was almost complete. Therefore, waiting for remedial actions to be undertaken prior to receiving the permit to operate would have severely impacted the reopening date of the station.
