In your contract it should be marked off what kind of sewer system you have on there.Also, if you're removing the tank, it's important it is properly removed and an environmental test is done to make sure there are no contaminants. 

@Christopher Petrillo, I would recommend doing a small sample test. 

However Holton-Wise offers a competitive as well as market tested & proven product.

Tenant agrees to comply with all duties required by Wyoming Statute §1-21-1204: maintain the Premises in clean and safe condition and not unreasonably burden any common area; dispose of all garbage and other waste; maintain all plumbing fixtures in a condition as sanitary as the fixtures permit; use all electrical, plumbing, sanitary, heating, and other facilities and appliances in a reasonable manner; prevent water pipes from freezing by turning off outside spigots, disconnecting hoses, and keeping the rental heated to at least 50 degrees; replace lightbulbs, air filters, water filters, and other consumables as needed; test smoke detectors every six months and replace batteries as needed; immediately notify Agent in writing of any defects or dangerous conditions Tenant becomes aware of; replace broken or cracked glass, no matter the circumstance of breakage, unless the Tenant provides Agent with a police report detailing breakage beyond the control of Tenant; pay to repair anything damaged by the Tenant, his guests or invitees, whether through intentional act or negligence; upon termination, remove all personal property and garbage either owned or placed on the Premises by Tenant and clean the Premises to the condition at the beginning of the AgreementCreate a policy and stick to it.

Also Pete makes a great point to use the 1% as a quick temp test.

This year will also test the U.S. consumer's ability to continue spending.

I can not think of any downsides, other than you have to invest money for the license and pass the test. 

The IRS has tests for excess.

Since calculation failed the PITIA test I did not even go there!

My son's elementary school (K-5) won an award for being in the top 7 schools in the state for biggest increase in standardized test scores from fall 2022 to spring 2023.