By the way...
Kodak Publication J-300 - "Environmental Guidelines for Amateur Photographers."
• Developers and wash agents may be discharged to municipal sewer systems in moderate quantities without fear of harm.
• Acid stop baths may be discharged if neutralized with sodium bicarbonate (baking soda) first.
• Fixers may be discharged AFTER silver has been removed.
• Exotics such as Selenium should NOT be discharged.
I take the extra step of turning in my spent fixer after desilvering but I don't neutralize stop bath so, according to Kodak's recommendation, I guess I'm about on par or a little above.
[Runs to the kitchen to find the baking soda.]