constraint, an alternative plan produced in 2007 by Meta Brunzema, an architect, and Daniel Gutman, an environmental planner, for the Hell's Kitchen Neighborhood Association would have expanded the Javits Center south over the Western Rail Yard, the site of the defeated West Side Stadium. Other features of the HKNA plan included an rooftop park, office and residential towers at the corners of the new exhibition hall, and conversion of Pier 76 to public use. In the end, the mayor proposed rezoning the Western Rail Yard site for commercial and residential development as part of the Hudson Yards. In April 2008, Governor David Paterson decided to renovate the existing Javits building with a severely revised budget of $465 million. The renovation, started in 2010, was led by design team FXFOWLE Epstein, whose redesign of the Javits Center's interior focused on upgrading organization and efficiency, as well as occupant comfort. The more transparent curtain wall, less opaque skylight systems, and light gray paint on the space frame have dramatically transformed the voluminous public spaces. New mechanical systems have improved the indoor air quality, reduced ambient noise, and significantly saved on energy consumption. The diamond-patterned Tuscan red terrazzo of the original floor has been replaced with soft tones of gray terrazzo. A new high-performance curtain wall has simplified and lightened the aesthetics of the original façade by changing the façade's module from to . This allowed for the introduction of more transparent glass with minimal structurally glazed mullions. Solid stainless steel panels replaced the opaque portions of glass to better express the building's functionality. The roof of the new expansion was also made "green" by the presence of a garden in the new wing's roof. The renovation was completed in November 2013. The expansion was meant to retain old tenants coming back annually, such as the New York Boat Show. In January 2014, it was revealed that the new roof was still leaking after the expansion. In January 2012, Governor Andrew Cuomo announced plans to construct a new convention center on the site of Aqueduct Racetrack in Queens and redevelop the Javits Center site with a mix of commercial space and apartments, similar to Battery Park City. However, Cuomo's plan was quickly scuttled due to disagreements over space in the Aqueduct Racetrack area. More Javits Center renovations are being eyed, with $15 million already going toward a new telephone system and improved Wi-Fi