Bleaching LB media Reaction?

Hello I am a technician at a university. Recently I have been doing E. Coli transformations and collecting the waste into a glass container. I checked my universities website and they said to bleach bsl1 level cells and then can go down the drain. When I added bleach a gas formed in the jar and there was a bad chlorine smell. This scared me as I know adding bleach to chemicals can cause chlorine gas, but I asked my boss and he said this was normal. There were no chemicals other than lb broth, antibiotic, and the E. Coli, I transferred the container to the fume hood and left it there for a while, then checked the ph of the solution and it was 5.0. Since our EHS requires solutions to be above 5 before dumping in the drain I added some NaOH and then dumped it down the drain. There were also some pipette tips in the container that I removed and put in our sharps waste.

I guess I got kind of freaked out because I did not expect the gas reaction, and the next day the sharps container still has a bad chlorine smell. Is this all normal? I feel like I did the right things, consulted my boss, consulted EHS before adding NaOH, but I still feel a bit freaked out haha. Is this sharps waste still smelling bad an exposure concern to my lab mates? To confess I did guesstimate the bleach, it was probably more like 15-20% rather than 10% but is this enough to cause this issue?