Porta potty for a 10-month historic renovation: weekly or bi-weekly service?

Bi-weekly service for five workers is possible, but weekly service is the smarter move. The holding tank in a standard unit holds 50 to 70 gallons. Five people over ten workdays produce less waste than a weekend event, but the deodorizer loses effectiveness after about a week. You might not hit capacity in two weeks, but odor becomes a real problem. Your rental company set weekly service because it is the industry norm for reliability. Missing a service risks complaints from your crew and a missed service fee if the driver comes and finds the unit blocked. Mild weather helps, but weekly pumping ensures the unit stays clean and odor-free. The cost difference between weekly and bi-weekly service is usually small compared to the risk of a foul unit disrupting work. Stick with weekly.

Luis is right, but he left out that the rental company's weekly service schedule is also about maintaining their equipment. A standard unit's deodorizer breaks down solids and controls odor, but it degrades over time regardless of use. Even with five users, urine salts and paper can build up, leading to stubborn odors and potential clogs that a bi-weekly service might not address. The mild Oregon weather helps, but weekly service ensures the unit stays in good condition for the full ten months. The cost savings from bi-weekly service are minimal compared to the risk of a malfunctioning unit that your crew avoids using. Stick with weekly.