{"formats":[{"name":"JSON","format":"json","url":"\/downloads\/2025\/code-json\/45.2-846.json"},{"name":"Plain Text","format":"text","url":"\/downloads\/2025\/code-text\/45.2-846.txt"},{"name":"XML","format":"xml","url":"\/downloads\/2025\/code-xml\/45.2-846.xml"},{"name":"HTML","format":"html","url":"\/downloads\/2025\/code-html\/45.2-846.html"}],"law_id":74385,"edition_id":1,"section_id":74385,"structure_id":14031,"section_number":"45.2-846","catch_line":" Air quality","history":"Code 1950, \u00a7 45-60.3; 1954, c. 191; 1966, c. 594, \u00a7 45.1-63; 1968, c. 310; 1993, c. 442; 1994, c. 28, \u00a7 45.1-161.229; 1996, c. 774; 2005, c. 3; 2021, Sp. Sess. I, c. 387.","full_text":"A\n\nAll active workings shall be ventilated by a current of air containing at least 19.5 percent by volume of oxygen and no harmful amount of any noxious or poisonous gas.B\n\nThe volume and velocity of the current of air in all active workings shall be sufficient to dilute, render harmless, and carry away flammable, explosive, noxious, and harmful gases, dust, smoke, and explosive fumes.","order_by":null,"text":{"0":{"id":267335,"text":"All active workings shall be ventilated by a current of air containing at least 19.5 percent by volume of oxygen and no harmful amount of any noxious or poisonous gas.","type":"section","prefixes":["A"],"prefix":"A","entire_prefix":"A","prefix_anchor":"A","level":1,"next_prefix":"B"},"1":{"id":267336,"text":"The volume and velocity of the current of air in all active workings shall be sufficient to dilute, render harmless, and carry away flammable, explosive, noxious, and harmful gases, dust, smoke, and explosive fumes.","type":"section","prefixes":["B"],"prefix":"B","entire_prefix":"B","prefix_anchor":"B","level":1,"prior_prefix":"A"}},"ancestry":[{"id":14031,"edition_id":1,"name":"Ventilation, Mine Gases, and Other Hazardous Conditions","identifier":"4","label":"article","depth":5,"order_by":1,"parent_id":14030,"metadata":{},"date_created":"2026-06-26 03:46:38","date_modified":"2026-06-26 03:46:38","permalink":{"id":223537,"object_type":"structure","relational_id":14031,"identifier":"4","token":"45.2\/II\/B\/8\/4","url":"\/45.2\/II\/B\/8\/4\/","edition_id":1,"permalink":0,"preferred":1}},{"id":14030,"edition_id":1,"name":"Requirements Applicable to Underground Coal Mines; Electricity, Safety, Etc","identifier":"8","label":"chapter","depth":4,"order_by":1,"parent_id":12986,"metadata":{},"date_created":"2026-06-26 03:46:38","date_modified":"2026-06-26 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03:44:06","permalink":{"id":222647,"object_type":"structure","relational_id":12985,"identifier":"II","token":"45.2\/II","url":"\/45.2\/II\/","edition_id":1,"permalink":0,"preferred":1}},{"id":12713,"edition_id":1,"name":"Mines, Minerals, and Energy","identifier":"45.2","label":"title","depth":1,"order_by":1,"parent_id":null,"metadata":{},"date_created":"2026-06-26 03:43:49","date_modified":"2026-06-26 03:43:49","permalink":{"id":222539,"object_type":"structure","relational_id":12713,"identifier":"45.2","token":"45.2","url":"\/45.2\/","edition_id":1,"permalink":0,"preferred":1}}],"structure_contents":[{"id":61647,"structure_id":14031,"section_number":"45.2-826","catch_line":" Pre-shift examinations","url":"\/45.2-826\/","token":"45.2\/II\/B\/8\/4\/45.2-826","metadata":false},{"id":75532,"structure_id":14031,"section_number":"45.2-827","catch_line":" On-shift examinations","url":"\/45.2-827\/","token":"45.2\/II\/B\/8\/4\/45.2-827","metadata":false},{"id":84889,"structure_id":14031,"section_number":"45.2-828","catch_line":" Weekly examinations","url":"\/45.2-828\/","token":"45.2\/II\/B\/8\/4\/45.2-828","metadata":false},{"id":55121,"structure_id":14031,"section_number":"45.2-829","catch_line":" Examinations of fans","url":"\/45.2-829\/","token":"45.2\/II\/B\/8\/4\/45.2-829","metadata":false},{"id":78974,"structure_id":14031,"section_number":"45.2-830","catch_line":" Record of examinations","url":"\/45.2-830\/","token":"45.2\/II\/B\/8\/4\/45.2-830","metadata":false},{"id":73101,"structure_id":14031,"section_number":"45.2-831","catch_line":" Notice of hazardous conditions","url":"\/45.2-831\/","token":"45.2\/II\/B\/8\/4\/45.2-831","metadata":false},{"id":56771,"structure_id":14031,"section_number":"45.2-832","catch_line":" Notice of monitor tampering 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systems","url":"\/45.2-837\/","token":"45.2\/II\/B\/8\/4\/45.2-837","metadata":false},{"id":55504,"structure_id":14031,"section_number":"45.2-838","catch_line":" Coursing of air","url":"\/45.2-838\/","token":"45.2\/II\/B\/8\/4\/45.2-838","metadata":false},{"id":75203,"structure_id":14031,"section_number":"45.2-839","catch_line":" Actions for excessive methane","url":"\/45.2-839\/","token":"45.2\/II\/B\/8\/4\/45.2-839","metadata":false},{"id":75918,"structure_id":14031,"section_number":"45.2-840","catch_line":" Crosscuts","url":"\/45.2-840\/","token":"45.2\/II\/B\/8\/4\/45.2-840","metadata":false},{"id":78688,"structure_id":14031,"section_number":"45.2-841","catch_line":" Permanent stoppings","url":"\/45.2-841\/","token":"45.2\/II\/B\/8\/4\/45.2-841","metadata":false},{"id":86254,"structure_id":14031,"section_number":"45.2-842","catch_line":" Ventilation controls","url":"\/45.2-842\/","token":"45.2\/II\/B\/8\/4\/45.2-842","metadata":false},{"id":59441,"structure_id":14031,"section_number":"45.2-843","catch_line":" Line brattice","url":"\/45.2-843\/","token":"45.2\/II\/B\/8\/4\/45.2-843","metadata":false},{"id":70834,"structure_id":14031,"section_number":"45.2-844","catch_line":" Ventilation with air from certain areas","url":"\/45.2-844\/","token":"45.2\/II\/B\/8\/4\/45.2-844","metadata":false},{"id":64318,"structure_id":14031,"section_number":"45.2-845","catch_line":" Worked-out areas","url":"\/45.2-845\/","token":"45.2\/II\/B\/8\/4\/45.2-845","metadata":false},{"id":74385,"structure_id":14031,"section_number":"45.2-846","catch_line":" Air quality","url":"\/45.2-846\/","token":"45.2\/II\/B\/8\/4\/45.2-846","metadata":false},{"id":71388,"structure_id":14031,"section_number":"45.2-847","catch_line":" Examination of mine for explosive gas and other hazardous conditions","url":"\/45.2-847\/","token":"45.2\/II\/B\/8\/4\/45.2-847","metadata":false},{"id":86482,"structure_id":14031,"section_number":"45.2-848","catch_line":" Tampering with methane monitoring devices prohibited; penalty","url":"\/45.2-848\/","token":"45.2\/II\/B\/8\/4\/45.2-848","metadata":false},{"id":66298,"structure_id":14031,"section_number":"45.2-849","catch_line":" Allowing persons to work in mine where methane monitoring equipment disconnected; penalty","url":"\/45.2-849\/","token":"45.2\/II\/B\/8\/4\/45.2-849","metadata":false},{"id":77699,"structure_id":14031,"section_number":"45.2-850","catch_line":" Intentionally bypassing a safety device; prohibition","url":"\/45.2-850\/","token":"45.2\/II\/B\/8\/4\/45.2-850","metadata":false},{"id":68872,"structure_id":14031,"section_number":"45.2-851","catch_line":" Control of coal dust","url":"\/45.2-851\/","token":"45.2\/II\/B\/8\/4\/45.2-851","metadata":false},{"id":79750,"structure_id":14031,"section_number":"45.2-852","catch_line":" Rock dusting","url":"\/45.2-852\/","token":"45.2\/II\/B\/8\/4\/45.2-852","metadata":false}],"previous_section":{"id":64318,"structure_id":14031,"section_number":"45.2-845","catch_line":" Worked-out areas","url":"\/45.2-845\/","token":"45.2\/II\/B\/8\/4\/45.2-845","metadata":false},"next_section":{"id":71388,"structure_id":14031,"section_number":"45.2-847","catch_line":" Examination of mine for explosive gas and other hazardous conditions","url":"\/45.2-847\/","token":"45.2\/II\/B\/8\/4\/45.2-847","metadata":false},"metadata":false,"official_url":"https:\/\/law.lis.virginia.gov\/vacode\/45.2-846\/","history_text":"<p>The record of this law\u2019s original creation isn\u2019t available online. It has been modified 7 times. Those modifications are cataloged by \u201cThe Acts of Assembly,\u201d a state publication, by year and chapter. Those modifications that can be read on the General Assembly\u2019s website will be linked accordingly. Those modifications are as follows: in 1954, chapter 191; in 1966, chapter 594; in 1968, chapter 310; in 1993, chapter 442; in 1994, chapter <a href=\"https:\/\/legacylis.virginia.gov\/cgi-bin\/legp604.exe?941+ful+CHAP0028\">28<\/a>; in 1996, chapter <a href=\"https:\/\/legacylis.virginia.gov\/cgi-bin\/legp604.exe?961+ful+CHAP0774\">774<\/a>; in 2005, chapter <a href=\"https:\/\/legacylis.virginia.gov\/cgi-bin\/legp604.exe?051+ful+CHAP0003\">3<\/a>.<\/p>","references":false,"refers_to":false,"permalink":{"id":223619,"object_type":"law","relational_id":74385,"identifier":"45.2-846","token":"45.2\/II\/B\/8\/4\/45.2-846","url":"\/45.2-846\/","edition_id":1,"permalink":0,"preferred":1},"url":"\/45.2-846\/","token":"45.2\/II\/B\/8\/4\/45.2-846","dublin_core":{"Title":" Air quality","Type":"Text","Format":"text\/html","Identifier":"\u00a7 45.2-846","Relation":"Code of Virginia"},"html":"\n\t\t\t\t\t\t<section id=\"A\"><p><span class=\"prefix-number\">A.<\/span> All active workings shall be ventilated by a current of air containing at least 19.5 percent by volume of oxygen and no harmful amount of any noxious or poisonous gas. <a id=\"paragraph-267335\" class=\"section-permalink\" href=\"https:\/\/vacode.org\/45.2-846\/#A\"><i class=\"fa fa-link\"><\/i><\/a><\/p><\/section>\n\t\t\t\t\t\t<section id=\"B\"><p><span class=\"prefix-number\">B.<\/span> The volume and velocity of the current of air in all active workings shall be sufficient to dilute, render harmless, and carry away flammable, explosive, noxious, and harmful gases, dust, smoke, and explosive fumes. <a id=\"paragraph-267336\" class=\"section-permalink\" href=\"https:\/\/vacode.org\/45.2-846\/#B\"><i class=\"fa fa-link\"><\/i><\/a><\/p><\/section>","plain_text":"                                 CODE OF VIRGINIA\n\n AIR QUALITY (\u00a7 45.2-846)\n\nA. All active workings shall be ventilated by a current of air containing at\nleast 19.5 percent by volume of oxygen and no harmful amount of any noxious or\npoisonous gas.\n\nB. The volume and velocity of the current of air in all active workings shall be\nsufficient to dilute, render harmless, and carry away flammable, explosive,\nnoxious, and harmful gases, dust, smoke, and explosive fumes.\n\nHISTORY: Code 1950, \u00a7 45-60.3; 1954, c. 191; 1966, c. 594, \u00a7 45.1-63; 1968, c.\n310; 1993, c. 442; 1994, c. 28, \u00a7 45.1-161.229; 1996, c. 774; 2005, c. 3; 2021,\nSp. Sess. I, c. 387.","edition":{"id":1,"name":"2025","slug":"2025","date_created":"2026-06-21 22:39:22","date_modified":"2026-06-21 22:39:22","current":1,"order_by":1,"last_import":null}}