METREX
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T1 / T3     : PMCH (perfluromonomethylcyclohexane)
Emissions   : Grams (Nov83-May84 Rockville, Jun84-Dec84 Lorton)
Measurement : Pico (10^-12) Grams per cubic meter 
              T1 (bats - sequential samplers)
              T3 (cats - passive samplers)

T2 / T4     : PDCH (perflurodimethylcyclohexane)
Emissions   : Grams (Nov83-Dec84 Mt Vernon)
Measurement : Pico (10^-12) Grams per cubic meter 
              T2 (bats - sequential samplers)
              T4 (cats - passive samplers)

T5          : PDCP (perfluromonomethylcyclopentane)
Emissions   : Grams
Measurement : Pico (10^-12) Grams per cubic meter 
              T5 (cats - passive samplers)



NOTES

	Background
	PMCH =  3 fL/L =  48 pg/m3
	PDCH = 10 fL/L = 176 pg/m3