GreenKubo

I have been assigned to perform administration on several Construction Contracts. I was in the process of emailing all of the contractors just to get an idea of how far along each project was, as a result a contractor requested an extension due to weather, the Customer and the Contracting Officer had no issues with the request so I prepared the modification and shortly noticed the Contractor has an Active Exclusion in SAM therefore we couldn’t process a modification on the Contract. Additionally, two days after the extension request the period of performance ended and the Contractor hasn't performed any of the work. I don’t really know how to handle this, I contacted the customer to start the CPARS process, I started to review the contract file and the Contractor did submit a Payment Bond. Can we de-obligate the excess funds off of the Contract? How do I know what the contractor is owed? ( I figured all he is owed is the price of the payment bond).