LATHAM — St. Peter’s Health Partners is seeking to open a $17.3 million ambulatory surgery center at the Capital Region Health Park in Latham, building on recent investments the health system has made within the park over the past year. St. Peter’s submitted a certificate of need to the state’s Department of Health last month seeking approval to establish, construct and operate an ambulatory surgery center at 711 Troy Schenectady Road in Latham, near Exit 6 of the Northway.