conTact us OnSite Services LLC Whether you need portable toilets for an event, or a cleaning crew to keep them spic-and-span during an event, you can trust us at OnSite Services LLC. Business Address: 10769 Hwy 789 Riverton, WY 82501 Telephone: 307-857-6051 After hours and on weekends, leave a message and we will get back to you as soon as possible Business Hours: Monday - Friday, 8:00am – 5:00pm Submit