This software is a comprehensive modeling and risk characterization package for Tier 1 and Tier 2 Atlantic RBCA evaluations for petroleum release sites. The RBCA Tool Kit combines contaminant transport models and risk assessment tools to calculate baseline risk levels and derive Site Specific Target Levels (SSTLs) for a full array of soil, groundwater, and air exposure pathways. The ease-of-use and streamlined graphical interface make it an essential tool for handling Atlantic RBCA calculations for both simple and sophisticated problems.

Risk-based evaluation of groundwater, surface water, surface soil, outdoor air and indoor air exposure pathways. Includes default exposure parameters for residential/agricultural and commercial/industrial land use scenarios and accommodates user-defined receptors.

Includes fate and transport models from the Atlantic RBCA User Guidance for all exposure pathways. Multiple points of exposure (POEs) allow analysis of actual vs. potential points of exposure in the same run. Default input parameters specific to Atlantic Canada are provided including default coarse-grained and fine-grained soil types.

Transient Modeling Options: In addition to steady-state air, soil, and groundwater exposure models, the RBCA Tool Kit allows transient groundwater modeling analysis to help estimate not only how high but how soon exposure could occur.

Oxygen-limited Biodegradation Model Option: New in version 4 to support indoor air vapour intrusion modeling, this option employs a subset of equations from the BioVapor model for consideration of oxygen-limited biodegradation of BTEX, TPH fractions, and other biodegradable hydrocarbons in the vadose zone. BioVapor is a free, user-friendly indoor vapor intrusion model that accounts for oxygen-limited biodegradation, which can prove critical for limiting vapor intrusion at sites with low concentrations (e.g., near risk-based screening levels) of petroleum hydrocarbons.

Extensive chemical list covers a wide array of chemicals, including organic solvents, petroleum hydrocarbons (including TPH fractions), pesticides, metals, and more. The user selects the chemical of concern and the key data loads automatically. Database can be expanded and customized by the user for state-specific values. Note: Regulatory authorities in Atlantic Canada currently approve the use of RBCA for petroleum constituents only.

A streamlined graphical interface guides the user through the RBCA evaluation process. Features include convenient unit selection and conversions, the ability to save and retrieve data for efficient record storage (including compatibility between English and French versions), and report printing options. The complete user’s manual is available on-line via context sensitive help buttons located throughout the software screens.

Produces report-quality output tables of applicable cleanup levels, baseline risk calculations, and chemical-specific summaries.