ENSR Corporation has been designing, installing and operating perimeter/fenceline ambient air quality and meteorological programs for over 30 years. ENSR’s more recent experience includes numerous perimeter and fenceline monitoring programs around hazardous waste sites, landfill excavation projects and MGP site remediation projects. This paper focuses on and presents general guidance on the development and implementation of perimeter air monitoring programs for MGP site remediation projects. It provides a set of suggested guidelines for the development of a systematic approach to the design and implementation of any MGP perimeter monitoring program. The paper will focus on the following general guidance topics: 1. Site-specific perimeter monitoring and data quality objectives 2. Parameters to be measured 3. Determination of action levels for the various parameters 4. Types of instrumentation available 5. Number and placement of fenceline monitoring locations 6. Frequency of sampling 7. Data telemetry and reporting alternatives 8. Routine field operations and equipment QC protocols 9. Perimeter monitoring program conceptual design and regulatory review 10. Monitoring plan generation.
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