A new janitorial service will be cleaning Vancouver City Hall and other city-owned or occupied buildings starting in February. The City Council on Monday authorized City Manager Eric Holmes to award a five-year contract to Del Sol Inc. of Pasco. The city will pay the company up to $7.5 million over the span, with an anticipated $1.1 million the first year. Del Sol emerged as the preferred contractor following a bid process that included the previous contractor, ABM On-Site Services West Inc., Brian Carlson, city public works director, told the council at its meeting Monday.