Here is an update on the fireworks stand on 1st Street NW -- from the neighbor who first reported it:
I called Harry Thomas` office and got the whole story.
If the sellers are permitted, it is legal to sell fireworks and apparently legal to sell them in temporary stands, even in residential neighborhoods -- that is why they often are sold by the bodegas or mini marts. According to Leonard in Mr. Thomas` office, selling fireworks is a very long standing tradition in this neighborhood and others. He says every year they get lots of complaints, and many more about the noise -- but unless the firework sellers are selling dynamite-based products, it is perfectly legal if permitted.