Pesticides In The Environment HARD EPA Chemigation Safety Guidelines & 40 CFR § 171

What mechanical failure causes pesticide solution to flow backward through irrigation pipes directly into an agricultural drinking water well during chemigation?

Multiple Choice Options

A Back-siphoning caused by a sudden pump shutdown or negative pressure in the supply line without an active anti-siphon backflow preventer. ✓ OFFICIAL VERIFIED CORRECT ANSWER
B Excessive high water pressure in the lateral line.
C Spraying after sunset.
D Using non-ionic surfactant.
✓ LEGAL EXPLANATION & STATUTORY RATIONALE
EPA Chemigation Safety Guidelines & 40 CFR § 171
Official Manual Chapter: Chapter 7: Environment & Chemigation

Back-siphoning occurs when a drop in water supply pressure creates a reverse vacuum, drawing pesticide tank mixtures down into deep aquifers unless positive anti-siphon backflow valves are installed.

Official EPA Core Study Domain Pesticides In The Environment
Practice All Domain Questions →

Related Questions in Pesticides In The Environment