Other Ambient Air Sampled 
on Top of Parkers Chapel Water Tower 
by the USEPA Between 1976 and 1978

Allyl bromide 24.8 ng/m3

1 or 2-Bromoethane 25.2 ng/m3

1,2-Ethylene dibromide 7.2 ng/m3

SOURCE:  EPA-560-6-78-002