The only item you and yours need to handle differently is used - silver laden - fixer. The wash water is so dilute it does not matter. The fixer by contrast has a high concentration of silver and needs conscientious handling. There are lots of threads here and on APUG ( www.apug.org/forums/forumdisplay.php?f=13 ) on the topic.

If you use non-standard items like mercury based solutions etc, then those need individual recommendations, but for the everyday BW process: develop, stop, fix, clearing agent, wash... just deal with used fix and you have done your entire duty to your septic field, your own health, and the environment in general.