Quality Assurance Project Plan

A QAPP documents the planning, implementation, assessment procedures, and quality control activities for any particular project. It integrates all the technical and quality aspects of the project in order to provide a blueprint for obtaining the type and quality of environmental data needed for a specific decision or use. All work performed or funded by EPA that involves the acquisition of environmental data must have an approved QAPP.


A line of waiting persons or vehicles. For example; a bottleneck of traffic at a signal, a line taxis at an airport, or people in line to board a bus or aircraft.

Quiet Zones

Areas along a rail line where a ban of train horn use is in effect