We are seeking approval of an Innovation and Design Credit for implementing a system which protects the tenants of the building from increased Electromagnetic Field (EMF) exposure due to the presence of high-current busways, electrical panels and switchgears within typical commercial buildings that are not protected for by any local, state, or federal building codes or regulations. Extremely low frequency (ELF) magnetic fields are generated from commercial building electrical power distribution systems and it has been shown that over-exposure to elevated and high ELF magnetic fields can have adverse affects on human health as well as interference with other sensitive electronic and electric control systems. The proposed EMF Shield to be incorporated into the project is to reduce the amount of EMF tenants are exposed to, thereby creating a healthier working environment. As demonstrated in the Intent Justification at the end of this CIR request, there have been hundreds of studies about the effect of EMF on a persons\' health and while there are a broad range of opinions on the quantifiable effects, there is an accepted belief that exposure to elevated and high levels of EMF can have a negative outcome on individuals health. The ID credit Intent, Requirements, and Documentation Requirements we have developed to impose on the project are outlined below. The Proposed Design Solution and Standards, and Intent Justification, are provided as ID validation following the Intent, Requirements, and Documentation Requirements. Intent Reduce building occupants and visitors exposure to EMF thereby supporting preventing and mitigating potential associated harmful effects of EMF on individuals to improve overall building Indoor Environmental Quality. Requirements Identify and adopt recognized design standards to protect building occupants from the potential harmful effects from EMF exposure. Implement design strategies, and/or products, and or systems that result in building occupant protection from EMF exposure that exceed the recommended level of protection dictated by accepted EMF protection design standards. Documentation Requirements Summarize and document EMF potential harmful effects on building occupants. Provided copy of recognized design standards to protect building occupants from the potential harmful effects from EMF exposure. Provide design drawings, specifications, and product/system submittals that demonstrate that the design standard of protection has been met or exceeded. Proposed Design Solution and Standards AC ELF magnetic shielding systems will be installed in the Main Switchgear Room and in all nine electric closets to attenuate (reduce) the magnetic field levels within the future building areas to 5 mG and less measured from the shielded surfaces during peak summer building loads assuming the ground/net currents are minimal. The proposed AC ELF magnetic shielding systems are designed to exceed the 10 mG standard recommended in Section 8.4.1.3 option 3 in the National Council of Radiation Protection and Measurements (NCRP) draft report published in the July/August 1995 issue of Microwave News (visit the Microwave News Homepage www.microwavenews.com for the entire draft report) as follows: 8.4.1.3 Option 3: An exposure guideline of 1
Though the aim of protecting building occupants from unsafe levels of electromagnetic radiation is laudable, at this time it is not likely that an ID credit would be awarded for the strategies outlined. There is not scientific consensus that EMF exposure at the levels typically experienced in household or work environments causes detriment to building occupants. As this field of study further develops, USGBC may chose to address the issue in future versions of the LEED rating system. Applicable Internationally.