{"id":40864,"date":"2025-12-15T11:00:45","date_gmt":"2025-12-14T22:00:45","guid":{"rendered":"https:\/\/www.drivingtests.co.nz\/resources\/?p=40864"},"modified":"2025-12-15T11:00:48","modified_gmt":"2025-12-14T22:00:48","slug":"the-spill-hazard-you-might-miss-fumes-heavier-than-air","status":"publish","type":"post","link":"https:\/\/www.drivingtests.co.nz\/resources\/the-spill-hazard-you-might-miss-fumes-heavier-than-air\/","title":{"rendered":"The spill hazard you might miss: fumes heavier than air"},"content":{"rendered":"\n<p>Many commonly used workplace chemicals give off vapours or fumes that are heavier than air, meaning they can sink, spread along floors, and accumulate in low areas such as pits, drains, sumps, basements, or inside vehicles and containers. This makes them especially dangerous for asphyxiation, fire, or explosion risk.<\/p>\n\n\n\n<p>Below is a practical, safety-focused list grouped by chemical type.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"740\" height=\"416\" src=\"https:\/\/www.drivingtests.co.nz\/resources\/wp-content\/uploads\/2025\/12\/chemical-spill-in-a-workshop-740x416.jpg\" alt=\"\" class=\"wp-image-40865\" srcset=\"https:\/\/www.drivingtests.co.nz\/resources\/wp-content\/uploads\/2025\/12\/chemical-spill-in-a-workshop-740x416.jpg 740w, https:\/\/www.drivingtests.co.nz\/resources\/wp-content\/uploads\/2025\/12\/chemical-spill-in-a-workshop-300x169.jpg 300w, https:\/\/www.drivingtests.co.nz\/resources\/wp-content\/uploads\/2025\/12\/chemical-spill-in-a-workshop-768x432.jpg 768w, https:\/\/www.drivingtests.co.nz\/resources\/wp-content\/uploads\/2025\/12\/chemical-spill-in-a-workshop.jpg 1365w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><figcaption class=\"wp-element-caption\">The danger is that you might not see the fumes, and in low-ventilation areas, they can hang around for ages.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Common Chemicals with Vapours Heavier Than Air<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Fuels &amp; Petroleum Products<\/strong><\/h3>\n\n\n\n<p>These are very common in transport, workshops, and yards.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Petrol (gasoline)<\/strong><\/li>\n\n\n\n<li><strong>Diesel fuel<\/strong><\/li>\n\n\n\n<li><strong>Kerosene<\/strong><\/li>\n\n\n\n<li><strong>Aviation fuel<\/strong><\/li>\n\n\n\n<li><strong>Heating oil<\/strong><\/li>\n\n\n\n<li><strong>Mineral spirits \/ white spirits<\/strong><\/li>\n<\/ul>\n\n\n\n<p>There is a high fire and explosion risk; vapours can travel long distances to ignition sources.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Solvents<\/strong><\/h3>\n\n\n\n<p>Widely used in cleaning, degreasing, painting, and manufacturing.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Acetone<\/strong><\/li>\n\n\n\n<li><strong>Toluene<\/strong><\/li>\n\n\n\n<li><strong>Xylene<\/strong><\/li>\n\n\n\n<li><strong>Methyl ethyl ketone (MEK)<\/strong><\/li>\n\n\n\n<li><strong>Isopropyl alcohol (IPA)<\/strong><\/li>\n\n\n\n<li><strong>Methanol<\/strong><\/li>\n\n\n\n<li><strong>Ethanol<\/strong><\/li>\n\n\n\n<li><strong>Trichloroethylene<\/strong><\/li>\n\n\n\n<li><strong>Perchloroethylene (PERC)<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Vapours can build up in enclosed or poorly ventilated areas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Refrigerants &amp; Gases<\/strong><\/h3>\n\n\n\n<p>Often overlooked because many are colourless and odourless.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Carbon dioxide (CO\u2082)<\/strong><\/li>\n\n\n\n<li><strong>Propane<\/strong><\/li>\n\n\n\n<li><strong>Butane<\/strong><\/li>\n\n\n\n<li><strong>LPG (liquefied petroleum gas)<\/strong><\/li>\n\n\n\n<li><strong>Refrigerants such as R134a, R404A, ammonia alternatives<\/strong><\/li>\n<\/ul>\n\n\n\n<p>CO\u2082 is not flammable but can displace oxygen and cause sudden unconsciousness.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Industrial &amp; Toxic Chemicals<\/strong><\/h3>\n\n\n\n<p>Less common but very hazardous.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hydrogen sulfide (H\u2082S)<\/strong><\/li>\n\n\n\n<li><strong>Chlorine<\/strong><\/li>\n\n\n\n<li><strong>Sulfur dioxide<\/strong><\/li>\n\n\n\n<li><strong>Carbon tetrachloride<\/strong><\/li>\n\n\n\n<li><strong>Ethylene dichloride<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Extremely dangerous at low concentrations, often fatal without warning.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Paints, Coatings &amp; Adhesives<\/strong><\/h3>\n\n\n\n<p>Common in workshops, panel shops, and construction.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Paint thinners<\/strong><\/li>\n\n\n\n<li><strong>Epoxy hardeners<\/strong><\/li>\n\n\n\n<li><strong>Spray paints<\/strong><\/li>\n\n\n\n<li><strong>Contact adhesives<\/strong><\/li>\n\n\n\n<li><strong>Resins<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Spray application greatly increases airborne vapour concentration.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why \u201cHeavier Than Air\u201d Matters<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vapours pool at ground level<\/li>\n\n\n\n<li>They linger longer than lighter gases<\/li>\n\n\n\n<li>Normal ventilation may be ineffective<\/li>\n\n\n\n<li>Ignition sources at floor level (forklifts, static sparks, drains) increase risk<\/li>\n\n\n\n<li>Workers may walk into dangerous concentrations unknowingly<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Key Safety Controls<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use low-level ventilation where required<\/li>\n\n\n\n<li>Keep ignition sources away from floor level<\/li>\n\n\n\n<li>Never rely on smell alone<\/li>\n\n\n\n<li>Store chemicals correctly and keep lids sealed<\/li>\n\n\n\n<li>Have spill kits suitable for chemicals, not just oil<\/li>\n\n\n\n<li><a href=\"https:\/\/www.drivingtests.co.nz\/course\/spill-control-training-course\/\">Spill control training<\/a> should include vapour behaviour, not just liquid and solid spills<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Many commonly used workplace chemicals give off vapours or fumes that are heavier than air, meaning they can sink, spread along floors, and accumulate in low areas such as pits, drains, sumps, basements, or inside vehicles and containers. This makes<span class=\"ellipsis\">&hellip;<\/span><\/p>\n<div class=\"read-more\"><a href=\"https:\/\/www.drivingtests.co.nz\/resources\/the-spill-hazard-you-might-miss-fumes-heavier-than-air\/\">Read more &#8250;<\/a><\/div>\n<p><!-- end of .read-more --><\/p>\n","protected":false},"author":1,"featured_media":40865,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[3,382],"tags":[],"class_list":["post-40864","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-advice","category-dangerous-goods"],"_links":{"self":[{"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/posts\/40864","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/comments?post=40864"}],"version-history":[{"count":1,"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/posts\/40864\/revisions"}],"predecessor-version":[{"id":40866,"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/posts\/40864\/revisions\/40866"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/media\/40865"}],"wp:attachment":[{"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/media?parent=40864"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/categories?post=40864"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.drivingtests.co.nz\/resources\/wp-json\/wp\/v2\/tags?post=40864"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}