contracts for electrical installations and structural repairs were also awarded in 2008. In 2010, the New York City Business Integrity Commission found that a subcontractor for the East Side Access project was involved with an organized crime family. The subcontractor, who had been hired to haul away the dirt from the excavation process, was replaced. In July 2011, after the tunnel boring machines finished drilling through the Grand Central station box, they were left in place under 38th Street and Park Avenue, as it was more economical than disassembling them in Queens and selling them for scrap, which could have added $9 million to the project's final cost. The next step in construction was to make cast-in-place concrete sections to create the tunnel lining. Each tunnel was in diameter, with an average depth of beneath street level. In September 2014, the MTA opened a pocket park, at 48 East 50th Street between Madison and Park Avenues, created along with a $97 million ventilation facility at that location. The pocket park, known as 50th Street Commons, has a capacity of 100 people standing, or 40 people sitting down. The park, containing abundant greenery along a granite backdrop with tables and chairs, was meant to reduce noise pollution from the ventilation facility, which also served as an emergency exit. On October 26, 2015, a seating area in Grand Central Terminal's lower-level dining concourse was closed in order to build structural framework that would allow for the construction of stairways and escalators between the concourse and new LIRR station. This was deemed a major milestone in the construction of East Side Access by Dr. Michael Horodniceanu, President of MTA Capital Construction. On November 10, 2015, a groundbreaking ceremony was held to celebrate the emergence of the project into Grand Central Terminal. On January 27, 2016, the final major contract for the construction of East Side Access was awarded to Tutor Perini Corporation. The contract was for the construction of four railroad platforms and eight tracks for the new Grand Central Terminal. The first tracks inside the 63rd Street Tunnel were laid in September 2017. The pre-cast platforms inside Grand Central Terminal were completed in May 2018, followed by the completion of the tracks in August 2018. The MTA also started installing escalators between the lower concourse and the platform mezzanine. Beginning in April 2018, the MTA began conducting site tours of the project;