We are designing a unique take on a dry-flush toilet (https://solaristoilet.com), and have one installed as a portable bathroom onto an 8' x 16' trailer, using an RV black water holding tank. It has only been lightly tested so far, and we want to partner with Street Angels to start testing it using heavy real-world situations.
We need someone with RV bathroom and black-water experience to help make sure the system is ready for this test, and then help assist up to once a week at a Street Angels location, which would entail riding out to the location (about an hour away) waiting 2-3 hours while the event takes place, taking the trailer to a dump station and emptying it.
Besides the initial work to get familiar with the system and have it locally tested, there might only be one Street Angel event, or there might be 12+. It all depends on how well everything works once we get it going.