Stepparent adoption and TPR

My 4 year old daughter has not had contact with her biological father since January 2011. In January 2012, he removed her from his health benefits. He, along with his family members, have chosen to not make any efforts to contact my daughter, or offer any form of support - emotional, financial, physical etc. Last I knew, he lived about 10 minutes down the road from us, so there should never have been a reason he couldn't make contact. He stopped calling or wanting to visit her once I asked if we could get a notarized written visitation schedule, which he refused. We were never married, however he is listed on her birth certificate and she has his surname. My husband has been in my daughter's life since 2010 and would like to adopt her. She knows him as her father and refers to his last name as her own. I believe this would be in the best interest of my daughter, as it will complete our family unity. I am just in need to be pointed in the right direction, what my options are, if this is grounds for termination of parental rights for her biological father etc. Any help would be appreciated. I am not looking to be "daddy bashed" or anything like that - I am just looking for insight on the situation and what I should do. Please leave any negative comments to yourself.