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Impact of ARA Amendments on Royalties and Permit Fees April 5, 2018
Under the ARA, licences are issued for private land, and permits are issued for Crown Land. Permit fees are comprised of two components: Royalties and Permit fees.
OMB Announces Webinars to Discuss Rules of Practice and Procedures for The New LPAT March 5, 2018
The OMB has distributed the following invitation for a webinar primer on the new Local Planning Appeal Tribunal which members may be interested in attending. The webinar is free but you must preregister. Note that it says that the new rules will come into effect on April 3rd. At the OSSGA Conference, a presentation was made which included speculation on what the implications of the new system could be, and timelines on transitioning to the new LPAT system. It is available in the members area of the website, and for members' convenience I have attached it here. We will continue to monitor and keep you posted on this issue.
Final Week to Nominate a Professional for Rock to Road's Top 10 Under 40! February 26, 2018
This year’s Top 10 Under 40 will involve anyone who was under the age of 40 as of December 31, 2017. Nominees can come from anyone who is involved in Canada’s rock to road industry, including business owners and management, contractors, equipment operators, technicians, trainers and researchers.
MNRF to Post Information on Natural Resource-Related Offences February 26, 2018
For many years, the Ministry of Natural Resources and Forestry has issued media releases to communicate serious convictions of individuals and corporations for natural resource-related offenses.
Axle Weight Pilot Project to Continue in 2018 February 25, 2018
On behalf of The Ontario Sand, Stone and Gravel Association (OSSGA), The Ontario Road Builders Association (ORBA) and The Ministry of Transportation of Ontario (MTO), we would like to thank you for your participation in the Aggregate Axle Weight Pilot Project in 2017.
Sprawling Dundas Quarry Could Become New ‘Very Large’ Lakes February 23, 2018
Updated rehabilitation pitch would someday transform sprawling quarry into some of Hamilton's largest human-made lakes.
OSSGA Launches Gravel Vote 2018 February 22, 2018
Join the conversation by engaging with candidates from across Ontario as we launch our campaign to educate elected officials on the importance of aggregate to the Ontario economy.
February is Hearth Month – Keep it in Check! February 14, 2018
February is Heart Month. This is good time to think about CPR, First Aid and AED training, a heart check-up with your doctor or researching the latest health information about keeping your heart healthy.
North Spirit Lake First Nation Community Based Land Use Plan: Invitation to Participate February 12, 2018
North Spirit Lake First Nation is leading preparation of a Community Based Land Use Plan (CBLUP) working together with the Ministry of Natural Resources and Forestry (MNRF).

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A Primer on Hearing Protection

July 5, 2017 at 1:20 PM

Hearing Protection

One form of controlling noise hazards is through the proper use of hearing protection devices (HPDs). Hearing protectors should be provided when engineering controls cannot be implemented or while such controls are being initiated.

Hearing protective devices are barriers that reduce the amount of noise reaching the sensitive inner ear. Fit, comfort, and sound reduction or “attenuation” are important considerations in choosing HPDs.

Commonly used hearing protection devices are either earplugs or earmuffs. Earplugs attenuate noise by plugging the ear canal. The muff-type protector is designed to cover the external part of the ear providing an “acoustical seal”.


Obviously, the effectiveness of an HPD depends on the amount of time it is worn. What is not obvious to most wearers is the drastic reduction in protection if HPDs are not worn in noise environments even for short periods of time.

The reduction in effectiveness can be as great as 95% or more if the protectors are not worn for as little as three or four minutes. It is therefore important to wear HPDs during the entire noise exposure period in order to achieve the maximum protection available.

The effectiveness of HPDS also depends on the manner in which noise is transmitted through or around the protector. The following points should be noted.

  • Even relatively small openings or air leaks in the seal between the hearing protector and the skin can typically reduce attenuation by 5 to 15 dB or more.
  • Constant movement of the head or body vibration can lead to air leaks, therefor making periodic adjustments necessary to ensure a proper seal.
  • Hair, especially long hair and facial hair, can cause a poor fit.
  • Proper fitting is crucial to obtaining a reasonable degree of protection from an HPD.
  • Earmuff effectiveness is greatly influenced by headband tension. If tension decreases through routine usage or alteration by the user, earmuff effectiveness is reduced.
  • Modifying the earmuff by drilling holes in the earcups renders the protection useless.
  • Anatomical differences such as ear canal size, jaw size, and heads of different shape and size may affect the fit of earmuffs and earplugs. To accommodate these differences, HPDs should be made available to users in various shapes and sizes.
  • Recreational headsets such as those used with radios and CD players are not to be used as hearing devices.

Based on Files from the Infrastructure Health & Safety Association: Construction Health and Safety Manual 2013 Edition