For many Brookfield sewer customers on Federal Road north of the cornfield, this June 1 Benefit Assessment bill may be the last.  The 28-year financing for this district is retiring.  Similarly, for most Sandy Lane customers, this is the final of ten Benefit Assessment payments. Upon final payment, the Brookfield Water Pollution Control Authority will release outstanding property liens.  Brookfield will be doing an infrastructure upgrade at one of the town's 14 sewer pump stations that must be maintained and updated as growth around town occurs.  The work at the pump station on Route 133 at the cornfield will be done within the next few months. The Authority is looking into sewering the properties around the Brookfield Market and Craft Center.