The city has been working for years to replace Bassick High School, the last of the city’s comprehensive high schools to be rebuilt. The state’s share of the $115 million high school already has legislative approval. Officials say the new location should not add to the overall cost of the project. It could bump out the school opening to sometime in the 2022-23 school year. The city will pay $6 million for about 6.29 acres of land bounded by the foot of University Avenue, Lafayette Street and Broad Street, 11 parcels in all, and enter a 99-year lease — at $1 a year — for the soccer field, which adds another three acres to the deal. The soccer field was built in 2007 with new artificial turf installed two years ago.