Can waste water department demand a 45 years of past due hook up fee from me when I just own the property for 3 years, and want to upgrade the sewage

Bought this commercial motel property on 7/2010, a past due fee was not on nor my contract with the Bayview loan service company who sold me the property, nor on my title commitment. The old cesspool failed due to the heavy rain last month, from the moment I found out, to the last meeting between my contractor and the department, this department refuses to give us a plan on how to address the current problem, instead they are worry more on demanding me bringing $9100 before they will look into my new plan. Now being a open pit of a size of 15 ft by 13 ft wide, 18 ft deep, only way we can do is to pump almost daily into a dump truck to protect the safety of current residents. According to them, they have the right to shut me down immediately if the payment is not presented to them as soon as possible. Do I have to pay for this? Is it not a status of limitation on how long before they can claim for their payment? If this never shown on public record, how can I be responsible for it