first retail delivery of the Tesla Model S took place during a special event at the Tesla Factory on June 22, 2012. Facilities NUMMI auctioned off the press lines, robots and other equipment to Toyota's other US factories, and Tesla purchased over $17 million of manufacturing equipment and spare parts in 2011, at significant discounts compared to new equipment. Additionally, Tesla bought a Schuler SMG hydraulic stamping press, worth $50 million new, for $6 million, including shipping costs from Detroit. The factory was about 10 times the size Tesla initially needed, and much of the site was unused in 2013, with most activity concentrated in the main building that does the final assembly of vehicles. Various parts of the NUMMI plant were planned to be modified to support Tesla vehicle production. For example, the passenger vehicle paint equipment was to be extensively modified through late 2011; converted from solvents to BASF water-based paint. Two paint lines (one car body, one component) were constructed from 2015. By 2014, half of the factory area was in use. The floors, walls and ceiling are painted white with skylights and high-efficiency lighting to create an environment similar to a laboratory, and the production environment is cleaner and quieter than at NUMMI. In July 2013, Tesla acquired an adjacent 35-acre property from Union Pacific Railroad for a test track. Tesla built a casting foundry in Lathrop in 2015 supporting the Fremont production, and leased 1.3 million sq ft of warehouses in nearby Livermore in 2017. In 2016, there were 4,500 parking spaces, and Tesla purchased a neighboring 25-acre site from Lennar. In August 2017, Tesla won approval from the Fremont City Council to double the size of the facility with about 4.6 million new square feet of space. Tesla also planned to expand production capacity five-fold to 500,000 vehicles per year by 2018, or 10,000 units per week. As of early 2019, the facility has of floor space. Employees Tesla started production with 1,000 workers. By 2013, this had risen to 3,000, and to 6,000 people in June 2016. In 2016, preparing for Model 3 production, Tesla planned to increase their work force to about 9,000 people. In fall of 2017, Tesla employed some 10,000 at the Fremont plant, a number still being shared in June 2018. In addition to Tesla employees, the company uses contractors for various functions. In May 2018, Elon Musk, in