Soft ground after rain: how do you keep a jobsite porta potty level and pumpable?

The rental company should place a portable toilet on a stable base, but you must provide one on soft ground. A standard unit weighs about 200 pounds empty and holds up to 70 gallons of waste, so it sinks in mud. Most operators expect level firm ground at delivery. If the site is known to get soft, you need to build a base before the unit arrives.

Use pressure-treated plywood sheets (at least 3/4 inch thick) or a gravel pad about 4 feet square. This spreads the weight and keeps the unit from listing. Once it starts leaning, the driver will try to relevel it on the next service visit if they can safely do so without sinking the truck. If the unit is too unstable or the ground is too soft, they may need to pull it out and reset it on a dry day, which could be a separate trip.

For your crew size of 8 to 12 workers, OSHA 1926.51 requires at least one toilet, so you're compliant. Weekly service is the norm, but heavy rain can make access harder. Keep the access path clear for the vacuum truck, which needs to get within about 25 feet to pump the holding tank clean.