State Senator John L. Burton introduced SB 1562 on February 18, 2000 to bypass the environmental impact study that would normally be required for a large project like the proposed Bay fill and mitigation in order to expedite construction. SB 1562 was signed into law on September 29, 2000. A study commissioned by the airport and released in 2001 stated that alternatives to airport expansion, such as redirecting traffic to other regional airports (Oakland or San Jose), capping the number of flights, or charging higher landing fees at selected times of the day 2001 would result in higher fares and poorer service. However, the proposal to build new runways on Bay fill continued to attract opposition from environmental groups and local residents. The airport expansion cost was estimated at in 1998, rising to a year later, including an estimate of for the Cargill wetlands purchase and restoration.