EP
30 OCT 00
Develop perimeter air monitoring action levels when perimeter air
monitoring is included as part of a remedial action design. The procedure for developing
perimeter air monitoring action levels applies to area sources only. Follow the step by step
procedure described below to calculate these action levels.
a. Use SCREEN 3 to calculate a dilution factor between the site perimeter and the receptor
point location.
Multiply the receptor point action level by the SCREEN3 dilution factor to derive the
perimeter air monitoring action level.
Monitor for and enforce the perimeter air monitoring action level at the site perimeter.
The procedures for developing perimeter air monitoring action levels do
not apply to point sources. Monitor point sources at the stack using emission rate monitoring
techniques to determine compliance with emission rate action levels.
B-2
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