Generally very little, if any
4 ounces
The EPA.
Only come from Recovery, Recycling, and reclamation
R22
R22
R22
It's illegal to vent the refrigerant into the atmosphere. To do it legally, you need a refrigerant recycling machine
Recycling equipment can be bought from many different stores online and offline. Some examples of stores that sell recycling equipment include Go Green Rei and REMFG.
With a refrigerant recovery and recycling machine.
AMCOR specializes in recycling. They offer domestic and commercial recycling collection services, as well as recycling equipment supply and servicing.
Recycling (Terry WB Gohring)
It is located on the accumulator assembly. I hope you are not wanting to add refrigerant to it especially if it has stop leak in it. The stop leak will ruin a shops recycling equipment as well as possibly do harm to your air conditioning. The refrigerant amount is located on a decal under the hood. The amount is EXACT and not guess work.
Recycling.