• Extent and Distribution of PCBs
    • Broad geographic extent and distribution of PCBs
    • Wide range of sources and pathways through which PCBs enter the environment (e.g., electrical equipment and other primary sources, wastewater treatment byproducts and other secondary sources, and contaminated stormwater runoff and other pathways), which necessitate a wide range of management responses
    • Gaps in knowledge related to the relative sizes of PCB sources
  • Political Will and Funding Availability
    • Political will to modify regulatory programs and/or create voluntary programs
    • Need to acknowledge ongoing sources of PCBs (i.e., PCBs are not a static “legacy” contaminant)
    • High cost of remedies (e.g., in-stream sediment remediation, contaminated site remediation, stormwater controls, electrical equipment replacements, etc.)