Credit Hiveminder.com The Environmental Protection Agency has reached a deal to split the cost of cleanup for a hazardous waste site in Nashua with a business that aims to redevelop the property. The city and EPA have wanted to clean up and redevelop the riverfront site known as the Mohawk Tannery for more than a decade. The former leather-making facility left toxic sludge in the ground in a residential area. It’s been proposed as a Superfund for more than two decades. Now, the EPA says it plans to reimburse a developer, Blaylock Holdings LLC, $6 million to carry out a previously finalized remediation plan.