If you're in the process of renting lots of portable toilets for a work site or event, you've already seen the types of sink setups that are included with the toilets. However, it would be a good idea to also rent some standalone portable sinks for people who want to wash their hands but who don't need to use a toilet. Take a look at why a separate sink is a good thing.
While lines could always form at a portable sink, the lines there would be a lot shorter and speedier than at a portable toilet. Plus, by letting people go somewhere other than to a portable toilet to wash their hands, you shorten the wait at the toilets, too. Portable sinks come with their own soap and towel dispensers, as well as their own water heaters -- these do need to be plugged in -- so there's no worry about the sinks in the portable toilets running out of supplies prematurely.
If you have the extra portable sinks, then if something happens in one of the portable toilets, people can still wash their hands. Whether supplies of soap have run out, or something messier has occurred, people can still take care of washing their hands instead of hoping they just don't have to touch anything for the rest of the day. Since the sinks have hot water heaters, you don't have to worry about whether the facilities will still be adequate when it comes to local hygiene regulations.
Less Ick Factor
Portable toilet companies have made great strides in showing how hygienic their portable toilets can be, but the units still have a bit of a reputation, especially after a long day at a crowded site. People who don't need to use a toilet but who want to wash their hands might feel a bit nervous about using one of the sinks in the portable toilets, leading them to avoid washing their hands at all. Having separate sink units outside the toilets lets people who haven't gotten over the ick factor still wash their hands.
If you'd like to find out about the individual features on different models of portable sinks, talk to the company from which you're getting the portable toilets, like Onsite Portable Toilets & Septic. If that company doesn't rent out the sinks, the staff should be able to refer you to a company that does. You'll be able to make your work site or the event site a lot friendlier and cleaner with the addition of the extra sinks.