Managing Public Health Risks Using Air Monitoring at a Former Manufactured Gas Plant Site
- 1 Center for Environmental/Occupational Risk Analysis and Management, College of Public Health, University of South Florida, Tampa, USA
- 2 GEI Consultants, Inc., Valrico, USA
- 3 Center for Environmental/Occupational Risk Analysis and Management, College of Public Health, University of South Florida, Tampa, USA
- 4 Center for Environmental/Occupational Risk Analysis and Management, College of Public Health, University of South Florida, Tampa, USA
- 5 Center for Environmental/Occupational Risk Analysis and Management, College of Public Health, University of South Florida, Tampa, USA
- 6 Center for Environmental/Occupational Risk Analysis and Management, College of Public Health, University of South Florida, Tampa, USA
Abstract
Monitoring emissions from a former Manufactured Gas Plant (MGP) site during remediation was used to manage risks associated with inhalation of Volatile Organic Compounds (VOCs) and contaminated particulates acting as an exposure conduit for Polycyclic Aromatic Hydrocarbons (PAHs) and heavy metals. This risk management case study presents a USEPA-approved air monitoring program implemented to manage public health risks during remediation at a former MGP site located in the southeast United States. Risk-based Acceptable Air Concentrations (AACs) were developed and a sampling regimen established to monitor potential emissions to maintain contaminant concentrations below the AACs. The exposure duration used was based on a twelve-month project duration and an exposure time of 24 hours per day; equations, toxicity values and sources were based on USEPA’s Regional Screening Levels. A total 535 twenty-four hour time weighted samples (269 VOC samples and 266 PAH samples) were collected over the project duration. Only minor levels of VOCs and PAHs were detected and no results were above the AACs. These timeweighted averages demonstrate that the real-time air monitoring and control measures implemented at the site effectively maintained concentrations below the AACs and were protective of public health.
- Department of Health and Family Services, Wisconsin Bureau of Environmental and Occupational Health (2004) Health-Based Guidelines for Air Management, Public Participation, and Risk Communication during the Excavation of Former Manufactured Gas Plants.
- USEPA (2008) Remedial Design/Remedial Action Consent Decree for Operable Units 1, 2 and 3.
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency (2009).
- USEPA (2009) Integrated Risk Information System.
- NRT (2009) Final Design Report.
- NRT (2009) Construction Quality Assurance Plan.
- NRT (2009) Fugitive Emissions Mitigation Plan.
- USEPA (2009) Mid-Atlantic Risk Assessment Regional Screening Table. http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/
- Site Repository, Sanford Gasification Plant, EPA ID: FLD984169193, Sanford, Seminole County, FL, NPL Status: Superfund Alternative Approach, North Branch Library, Sanford.
- USEPA (2000) Guidance for the Data Quality Objectives Process for Hazardous Waste Sites, EPA QA/G-4HW EPA/ 600/R-00/007.
- USEPA (2000) Guidance on Systematic Planning Using the Data Quality Objectives Process, EPAQA/G-4.