Question

1. One mechanism that product labels use to protect workers Is the restriction of when a worker can re-enter the field after application. This rule is called…
   1. The Worker protection standard (WPS)
   2. The personnel protective equipment (PPE) requirement
   3. The decontamination proviso (DP)
   4. The restricted entry interval (REI)
2. A newspaper had an alarming headline that indicated bifenthrin was found in urban drainage steam at the level of 14,200 picograms pg/L. How many ppb does this number represent? _______
3. The hemodynamic process that controls the behavior and fate of pesticide residues in the soil environment, including mass transfer, bioavailability, and degradation is called [_______]
4. DDT has an extremely low vapor pressure, yet its residues have migrated to the polar regions of the Northern Hemisphere where it has contaminated fish and mammals. What physiochemical property and phase transfer property best explains this ability of DDT to disperse to far northern latitudes.
   1. Extremely low water solubility and moderate Henry’s law constant
   2. Extremely low water solubility and very large soil distribution coefficient
   3. Very high-water solubility and very high Henry’s law constant
   4. Long half-life and low water solubility

Answer 1

One mechanism that product labels use to protect workers is the restriction of when a worker can re-enter the field after application. This rule is called.

Answer D. Restricted entry interval (REI)

A newspaper had an alarming headline that indicated bifenthrin was found in urban drainage steam at the level of 14,200 picograms pg/L. How many ppb does this number represent?

Answer- ppb is 0.014

The hemodynamic process that controls the behavior and fate of pesticide residues in the soil environment, including mass transfer, bioavailability, and degradation is called

Answer- Hydrolysis

DDT has an extremely low vapor pressure, yet its residues have migrated to the polar regions of the Northern Hemisphere where it has contaminated fish and mammals. What physiochemical property and phase transfer property best explain this ability of DDT to disperse to far northern latitudes.

Answer D. Long half-life and low water solubility