cyklon_300:you contact the Diving Supervisor (Bridget) and request a date to dive. If the time you selected is available, you will be assigned a task to perform (weeding/replanting/cleaning springs).
After your 'chores' are done, you can dive the lake for fun...
One perk (if you're a gardener-type) of being a Sci Diver is that there are large trash bags of aquatic weeds that you can take home for the compost pile...
Our compost pile is top-rate - AND - I get all the shallow diving I care for. Bridget & crew are quite accomodating, especially for week-day divers like myself, so it's real close to a open pool - over the weekend, there are lots of divers & classes & such, so scheduling and finding appropriate tasks is somewhat harder - - - Still free once you've done the class and do the work though! - - See ya there..