When a liquid hazardous chemical spills onto a highway near bridge culverts, storm drains, or agricultural irrigation canals, what environmental protection action must be prioritized?

1. Use sandbags, soil, absorbent booms, or drain covers to construct dikes blocking chemical entry into drains, waterways, and farmland
2. Wash all spilled chemicals into the nearest municipal drinking water reservoir
3. Set the liquid spill on fire with gasoline to burn away all evidence
4. Dig a trench directing the chemical directly into a nearby fish farm