1.0T. Harrishttps://tharris.ca/fr/rich600338<blockquote class="wp-embedded-content" data-secret="4uted0sByK"><a href="https://tharris.ca/fr/silica-in-construction-hazards-control-measures/">Silica in Construction: Hazards & Control Measures</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://tharris.ca/fr/silica-in-construction-hazards-control-measures/embed/#?secret=4uted0sByK" width="600" height="338" title="“Silica in Construction: Hazards & Control Measures” — T. Harris" data-secret="4uted0sByK" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://tharris.ca/wp-includes/js/wp-embed.min.js /* ]]> */ </script> In recent years, to protect workers in the construction industry against exposure to hazardous chemicals, the Ministry of Labour removed the exemption to Ontario Regulation 833 that construction projects enjoyed. This regulation sets out requirements for protecting workers against chemical exposures and to abide by the current Ontario legal limit for respirable crystalline silica (quartz & tripoli) of 0.10 mg /m3 TWA.https://tharris.ca/wp-content/uploads/2022/08/pexels-photo-38070-1-e1531496860719.jpeg