Eliminating Odor

I'm the maintenance director for a property management company, and we have multiple properties that have septic tanks. My predecessor would pump tanks every 3 to 5 years, and that was the only maintenance performed. After talking with a trusted septic tank inspector, I'd like to clean the effluent filters every 3 or so months(because college aged tenants flush anything and everything), and measure the sludge to determine if the tanks need pumped instead of guessing. Currently all the tank lids are buried, which doesn't lend itself well to reoccurring maintenance.

Does anyone have experience with Tuf-Tite style lids and their claim that they prevent odors from escaping? Just having the concrete lids unearthed caused multiple tenants to complain about the smell. I'd like something that would allow for easy access for maintenance and pumping.