Describe a typical chemical feed system layout and list safety considerations for handling treatment chemicals.

• A. Storage tanks → piping → meters → mixing tanks; safety: none.
• B. Storage tanks → feeders/injection points → metering pumps → piping; PPE, ventilation, spill containment, chemical incompatibilities, emergency eyewash/shower.
• C. Pipes → tanks → sensors; safety: standard lab coat only.
• D. Tanks → pumps → injection points; safety: none.

Answer: (B)