A state implementation plan established following the establishment of National Ambient Air Quality Standards must address the means by which the state is going to ensure that the pollutants in the air within its boundaries will meet the primary National Ambient Air Quality Standards within ________ of their establishment.

A) Three years
B) Two years
C) Eighteen months
D) Twelve months
E) Nine months

State Implementation Plan

A detailed description of the programs a state will implement to meet national air quality standards, as required by the Clean Air Act.

Primary National Ambient Air Quality Standards

Regulations established by the EPA to protect public health, including the health of sensitive populations such as asthmatics, children, and the elderly, by setting limits on the concentration of major air pollutants.