Environmental Report

GRI G4-32,G4-33

Calculation Standard for Environmental Data and Indices FY2015

Objective Item Calculation Method & Standard
Material flow-related Classification by business type Classification into civil engineering and building construction (sites), offices (excluding development projects and others), and factories
CO2 emissions Scope classification Scope 1: CO2 emissions associated with the combustion of fossil fuels
Scope 2: Indirect CO2 emissions associated with the use of electricity, steam, and chilled and hot water
Scope 3: CO2 emissions associated with the transport of construction waste off construction sites and the outward
and return transport of soil from construction (off-site emissions)
CO2 emissions CO2 emission coefficient: Calculated using the emission coefficient in accordance with the Act to Rationalize the Use of Diesel, Heavy Oil, and Energy and the Act on Promotion of Global Warming Countermeasures. For offices, the actual emission coefficient for FY2014 according to the electrical power company is used.
Electrical power: Calculated using the 2014 emission coefficient on the user end announced by the Federation of Electrical Power Industries of Japan (before reflecting the Kyoto credit), 0.554t- CO2 / Mwh.
City gas: Calculated using the standard calorific value of the gas supply company and the emission coefficient of the Act on Promotion of Global Warming Countermeasures.
NOx and SOx emissions Calculation of NOx and SOx emissions originating from diesel, heavy oil, and kerosene of the Taisei Corporation Group. Calculated using the emission coefficient of the Architectural Institute of Japan’s "Guide to Building LCA - Evaluation Tool for Measures against Global Warming, Resource Consumption, and Waste - Revised Version."
[Offices and Factories] Energy-related and water consumption The annual quantities purchased and used by the offices and factories of the Taisei Corporation Group are calculated in monthly units.
[Civil Engineering and building construction (sites)]
Energy-related and water consumption
Calculated for each company based on the Taisei Corporation Group environmental data manual. Consumption in a two-month period in FY2015 is sampled at 166 construction sites to calculate the consumption per unit of construction turnover (basic unit). Annual consumption is calculated by multiplying this basic unit by the construction turnover for the year. For civil engineering, this calculation is performed for each construction type.
[Civil Engineering and building construction (sites)] Calculation of the main construction materials and other materials (concrete formworks and alternative formworks) purchased. The quantities of the main construction materials and other materials purchased directly through individual construction of Taisei Corporation and joint venture construction for which Taisei Corporation is the representative.
The same calculation method applies to the consumption of concrete formworks and alternative formworks.
[Civil engineering and building construction (sites)] Calculation of chlorofluorocarbons and halon recovered. Recovered quantity of chlorofluorocarbon and halon processing commissioned by Taisei Corporation Group.
[Civil engineering and building construction (sites)] Calculation of construction soil emissions Surplus construction soil removed from construction sites of Taisei Corporation.
[Civil engineering, building construction (sites), and factories] Calculation of construction and industrial waste emissions Construction by-products (waste and valuable resources) emitted at the sites of the Taisei Corporation Group’s individual construction projects, joint venture construction for which Taisei Corporation Group is the representative, and factories owned by Taisei Corporation Group.
Prevention of
global warming
Estimated CO2 emissions and reduction rate in the construction stage Calculated using the "Energy Efficiency Plan" for each of 29 projects, each with a total floor area of 300m2 or more and with a total area of about 550,000m2, of Taisei Corporation building construction projects.
CO2 emissions and reduction rate in the construction stage CO2 emissions at Taisei Corporation construction sites and percentage of CO2 emissions reduced from FY1990 emissions. In some cases, temporary or special construction that has a major effect on the data continuity has been excluded from the calculation.
Resource recycling Results for adoption of green procurement items Calculated the quantities based on the design specifications by Eco Sheet CASBEE introduced to buildings designed by Taisei Corporation
Final disposal rate (final disposal quantity / quantity arising) x 100 (excluding construction sludge and quantities not attributable to Taisei Corporation)