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Project Experience: Parcel 7 Turnpike Air Rights Development Greenhouse Gas Emissions Analysis, Massachusetts

The Challenge

HMMH conducted a Greenhouse Gas Emission analysis for two projects in Massachusetts in support of the Environmental Impact Report submittals.  The analysis was conducted to address the Massachusetts Environmental Policy Act (MEPA) recent Greenhouse Gas (GHG) Emissions Policy.  The MEPA GHG Policy requires all applicable projects to evaluate greenhouse gas emissions of carbon dioxide generated by the project.  Both Projects were large, mixed-use development projects near public transportation infrastructure incorporating a wide array of sustainable design elements.

The Strategy

The GHG analysis consisted of estimating direct emissions from combustion sources: indirect emissions associated with the electrical and gas demands from the buildings along with transportation emissions generated by the project.  As part of the analyses, HMMH evaluated the proposed sustainability measures for direct and indirect sources and their effect on the Projects total GHG emissions for the three operating alternatives.  Examples of the types of sustainable elements evaluated were energy efficiency in the boilers and HVAC systems, high-efficiency lighting, green building roofs, window shading, and traffic demand mitigation measures. 

The Solution

The analyses showed that implementation of all the proposed sustainable design elements in order to meet LEED standards resulted in a reduction of GHG emissions compared to designing the Project to a minimum code-compliant condition.