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Committee for Renewable Energy for Barrington is ignoring health and safety

I helped research the structural failure and noise aspects of wind turbine generators for the Health & Safety (H&S) subcommittee of the CREB (Committee for Renewable Energy for Barrington). CREB says it bases its recommendations only on objective data. If so, why did it selectively ignore research produced by its own H&S subcommittee?

I helped research the structural failure and noise aspects of wind turbine generators for the Health & Safety (H&S) subcommittee of the CREB (Committee for Renewable Energy for Barrington). CREB says it bases its recommendations only on objective data. If so, why did it selectively ignore research produced by its own H&S subcommittee?

The first H&S report predicted a noise level of 41 dB at 1,000 feet, assuming that the sound power level of the turbine is 102.7 dB. Subsequently, a new paper by acousticians Kamperman and James (a review of it can be found at www.barringtonenergy.com/files/reports/Review_of_Kamperman_and_James.37.pdf) was published and recommended a noise level at neighbors' property boundaries of no more than 35 dB (lower if the nighttime ambient levels are less than 30 dB). To reduce the sound levels from 41 dB to 35 dB would require doubling the setback distance to 2,000 feet for a wind turbine with a sound power level of 102.7 dB.

The CREB recommendation ignores this information.

Another piece of new information came from the recommended contractor, Lumus Construction. Lumus provided sound power level measurements for the type of turbine they propose to install at the Legion... more [truncated due to possible copyright]  

I helped research the structural failure and noise aspects of wind turbine generators for the Health & Safety (H&S) subcommittee of the CREB (Committee for Renewable Energy for Barrington). CREB says it bases its recommendations only on objective data. If so, why did it selectively ignore research produced by its own H&S subcommittee?

The first H&S report predicted a noise level of 41 dB at 1,000 feet, assuming that the sound power level of the turbine is 102.7 dB. Subsequently, a new paper by acousticians Kamperman and James (a review of it can be found at www.barringtonenergy.com/files/reports/Review_of_Kamperman_and_James.37.pdf) was published and recommended a noise level at neighbors' property boundaries of no more than 35 dB (lower if the nighttime ambient levels are less than 30 dB). To reduce the sound levels from 41 dB to 35 dB would require doubling the setback distance to 2,000 feet for a wind turbine with a sound power level of 102.7 dB.

The CREB recommendation ignores this information.

Another piece of new information came from the recommended contractor, Lumus Construction. Lumus provided sound power level measurements for the type of turbine they propose to install at the Legion Way site. The source document is not available via the internet but a review of it can be found at www.barringtonenergy.com/files/reports/Review_of_Newburyport_Noise_Impact_Assessment.36.pdf.

The measurements show that the maximum sound power level of the turbine is 107 dB, that is, 4.3 dB higher than that assumed in the first H&S report. With 107 dB sound power, to get down to the original 41 dB prediction would require a setback of around 1,600 feet. The CREB recommendation ignores this information.

The CREB report says that surface winds will mask the sound of the wind turbine noise. While this is partly true, it ignores one of the important references in the H&S initial report, namely G.P. van den Berg's PhD thesis (http://dissertations...berg/17_thesis.pdf).

Van den Berg's thesis shows that the masking effect is not applicable under stable atmospheric conditions where wind speeds near the ground can be close to zero while the wind speed at the turbine hub may be high enough to drive the turbine at full power, so there will be no masking effect. The CREB recommendation ignores this information.


Source: http://www.eastbayri.com/de...

DEC 9 2008
http://www.windaction.org/posts/18206-committee-for-renewable-energy-for-barrington-is-ignoring-health-and-safety
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