Remedial investigation/feasibility study RI/FS

No specific information was found on the releases of diisopropyl methylphosphonate to soil. However, diisopropyl methylphosphonate has been detected in soils at the RMA (Williams et al. 1989). Concentrations of diisopropyl methylphosphonate in live surface soil samples at the RMA ranged from <0.05 to 0.24 mg/kg (Williams et al. 1989). Concentrations of diisopropyl methylphosphonate in surface soil samples measured during the Remedial Investigation/Feasibility Study (RI/FS) at RMA ranged from less than the analytical limit of 0.114 mg/kg to 11 mg/kg (Ebasco Services 1991). The most recent sampling conducted in 1995 indicated the concentrations of diisopropyl methylphosphonate in the onpost surface soil samples were less than the analytical reporting limit of 0.342 mg/kg (D.P. Associates 1995). 

If it deems it necessary, the USEPA can require an expedited response action (ERA) at a site that would require an immediate engineering evaluation/ cost analysis (EE/CA). After a removal action is completed or determined unnecessary, the long-term remedial action must be undertaken. First, a remedial investigation/feasibility study (RI/FS) is performed to determine a proper course of action. This can involve ... 

Based on available information, including a Remedial Investigation / Feasibility Study (RI/FS), the American Creosote Works site in Pensacola, Florida was selected for the investigation. The site was included on the National Priorities List on the basis of the RI/FS study which suggested that the groundwater imder the site was heavily contaminated with both PAHs and PCP. 

This chapter presents a regulatory overview of on-site remediation, remedial investigations (RI), feasibility studies (FS), remedial technologies, and a simulated case study. The discussion of remedial investigations and feasibility studies also includes the development and selection of remedial technologies. The case study outlines a remedial investigation and feasibility study, as well as the selection of remedial technologies. 

QA, quality assurance RI, remedial investigation FS, feasibility study SAP, sampling and analysis plan FSP, field sampling plan QAPP, quality assurance project plan OSHA, Occupational Safety and Health Administration. 

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