testing. 1984: Launch of acid gas control program and commitment to cutting emissions in half by 1990. 1986: "War on acid gas emissions" continues as Lakeview tests limestone-injection scrubbing technology to further reduce emissions, and uses more low-sulphur coal. 1987: The prospect of a major equipment overhaul looms, along with new environmental restrictions. Ontario Hydro begins three-year study aimed at obtaining approval for acid gas control equipment at coal-fired generating stations. 1989: Hydro announces a major Lakeview rehabilitation between 1990 and 1994, including the addition of acid gas control equipment on all eight units. 1991: Revised plan for Lakeview includes complete rehabilitation for Units 5 and 6, and a reduced rehabilitation for Units 1 and 2; decision on remaining four units deferred. 1992: High-efficiency precipitators are installed on all four operating units, which combined with flue gas conditioning technology to capture more than 99% of particulates in the flue gases. 1999: Lakeview receives ISO 14001 accreditation and announces new initiative to further reduce nitrogen oxide (NOx) emissions. 2001: Lakeview completes installation of new, low nitrogen oxide burners on all operating units, cutting nitrogen oxides emissions by 50% from the 1999 level. Timeline June 1, 1958: Construction begins on 52 hectares of land purchased from Toronto Township July 24, 1959: Ontario Hydro announces the addition of a third and fourth 300,000 kilowatt generating unit to Lakeview by 1964 1961: Unit 1 produces first electricity on October 30 1962–1965: Units 2 – 4 in service 1965–1969: Units 5 – 8 in service On the waterfront of Lake Ontario, "The Four Sisters" – Lakeview's four 146 meter (sometimes quoted as 150 meters) concrete stacks – became a familiar navigational beacon for boats, ships and airplanes. Lakeview ran at its highest capacity as a baseload plant from the late 1960s to the early 1980s and met about 17% of the province's energy needs. During this time, Lakeview played an important role in providing an around-the-clock, reliable supply of electricity to Ontario's energy customers. 1980s: In the 1980s, as nuclear units came on line at Pickering and Bruce, Lakeview's role in the electricity marketplace changed. It transitioned to a peaking plant, due to its higher costs operating only when electricity demands were highest, or other generating units were not available. In 1986, the station began to use lower-sulphur coal to reduce emissions of sulphur dioxide and nitrogen oxides. 1990–1993: $1.1 billion was invested in rehabilitation