The Burlington Public Library is closing in on a fundraising goal ahead of its first major expansion in nearly 40 years.The library currently sits at 16,000 square feet a size that was designed for a much smaller community than the actual population it services."It was built for a city of 10,000. But we have a service population of 20,000," Joe Davies of the Burlington Public Library said.The planned expansion will add 5,500 square feet to the e…