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Risk-Evaluation in Support of Solid Waste Facility Site Assignment & Permitting (Massachusetts)

KERA provides quantitative risk-evaluation services in accordance with the Interim Risk-Evaluation Guidance Document for Solid Waste Site Assignment and Permitting in Support of 310 CMR 16.00 & 19.000, MADEP Bureau of Waste Prevention, June 2001. References and project summaries are available upon request.


Application:

A quantitative risk-evaluation is required under these new regulations for new or expanded municipal solid waste facilities, residuals landfills, unprocessed construction and demolition facilities designed to receive greater than 150 tons of refuse per day.

Approach:

The quantitative risk-evaluation for a standard municipal solid waste facility is designed to assess potential exposure to ambient air emissions from the waste mass.
  • Chemicals of Concern (COCs) include the standard list of Landfill AP-42 Chemicals.
  • Exposure Point Concentrations (EPCs) based on air quality dispersion modeling
  • Exposure scenarios include the conservative screening profile and site-specific exposure profiles as required.
  • Non-cancer and cancer risks are characterized based on risk management criteria (Hazard Index = 1 and Excess Lifetime Cancer Risk = IE-05).
  • Impacts from total VOC emissions are evaluated using the de minimus risk criteria (HI = 0.1 and ELCR 1E-06).
  • Site-specific COCs and exposure conditions may be considered under MADEP approval.

Documentation:

Procedures and results are fully documented and presented to the client in the form of a final report, or as a modified document formatted to be inserted into a comprehensive report. Preliminary drafts are submitted, as necessary.
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