Legal Standard
EPA Chemigation Safety Standards & 40 CFR § 171
Chemigation Anti-Siphon Protection
Statutory Definition:
An interlocking mechanical assembly consisting of a functional main check valve, vacuum relief valve, low-pressure automatic drain, and chemical injection check valve on agricultural irrigation systems.
Practical Exam Application:
Prevents catastrophic reverse siphonage of pesticide solutions into surface rivers or deep aquifer potable water wells upon pump shutdown.