Maggie, Although a truely empty tank (an open valve yields no gas)
can legally (under EPA rules) be disposed of in the trash, the small
propane tanks should be taken to the local household hazardous waste
disposal site. Hopefully there IS one. If you are not aware of that
service, call your trash hauler or city/county fire department.
Those folks should know where and when the closest site operates.
Failing that, call 1-800-CLEANUP and ask them. Judy in Kansas -
hotter than blazes, but not hotter than Texas! Hope my Texan friends
get cooler weather soon.
Judy M. Willingham, R.S.
221 Call Hall Kansas State Univerisity
Manhattan KS 66506
(785) 532-1213 FAX (785) 532-5681