Which statement best describes the relationship between C-PEC and C-SEC?

• A. C-PEC contains aerosols at the point of handling; C-SEC provides added containment by isolating HD work from non-HD spaces
• B. They are the same component
• C. C-SEC is optional if C-PEC is present
• D. PPE alone is sufficient without C-PEC or C-SEC

Answer: (A)

C-PEC contains aerosols at the point of handling, while C-SEC provides added containment by isolating HD work from non-HD spaces. The primary engineering control (C-PEC) directly contains the manipulations and uses filtration to prevent aerosols from escaping the immediate work zone. The secondary engineering control (C-SEC) surrounds that work area, creating a dedicated, controlled environment (often with negative pressure and proper airflow) to prevent any contaminants from reaching other parts of the facility. PPE alone won’t achieve this level of containment; both C-PEC and C-SEC work together, with the C-PEC inside the C-SEC in practice (a containment cabinet housed in a containment room).