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" B. Of such opacity as to obscure an observer's view to a degree equal to or greater than does smoke described in subsection A of this rule. "
Air Pollution: Hearings Before Subcommittee No. 2...90-1, on H.R. 6981, H.R ... - Side 4
av United States. Congress. House. District of Columbia - 1967 - 103 sider
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The Relationship of Economic Development to Environmental Quality, Hearings ...

United States. Congress. Senate. Committee on Public Works - 1971 - 842 sider
...designated as Xo. 1. on Che • Ringelmann Chart, as published by the United States Bureau of Mines, or b. Of such opacity as to obscure an observer's view to a degree equal to or greater than docs smoko described in subsection (a) of _this . .rule. JI Emission o? p.-...
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Adequacy of Northern New England Air Service, Hearings Before the ...

United States. Congress. Senate. Commerce - 1972 - 1361 sider
...on the Ringelmann Chart, as published by the United States Bureau of Mines, or its equivalent, or 2. Of such opacity as to obscure an observer's view to a degree equal to or greater than does smoke described in Paragraph 3 b 1 of this standard. c. Combustion Contaminants....
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Military Construction Authorization, Fiscal Year 1977: Hearings Before the ...

United States. Congress. Senate. Committee on Armed Services. Subcommittee on Military Construction - 1976 - 575 sider
...contaminant which is (1) darker in shade than smoke designated as No. 1 on the Ringelmann Chart, or (2) of such opacity as to obscure an observer's view to a degree greater than does smoke designated as No. 1 on the Ringclmann Chart (when used measure of opacity) . umu (b) No owner shall cause, suffer,...
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A Wood-fired Cogeneration System for University of California, Santa Cruz ...

Robert Stayton - 1980 - 119 sider
...that designated as No. l on the Ringleman Chart, as published by the United States Bureau of Mines, or b. Of such opacity as to obscure an observer's view to a degree equal to or greater than does smoke described in subsection (2) of this rule. Rule 40l. Wet Plume ....
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Information Circular

1951
...that designated as No. 2 on the Hinge Imann Chart, as published by the United States Bureau of Mines, or b. Of such opacity as to obscure an observer's view to a degree equal to or greater than does smoke described in subsection (a) of this Rule. RULE 51. NUISANCE. A...
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Hearings, Reports and Prints of the Senate Committee on Public Works

United States. Congress. Senate. Committee on Public Works
...than three minutes In any one hour which !• (a) as dark or darker In ahade than Rlngelmann No. 2, or (b) of such opacity as to obscure an observer's view to a degree equal to or greater than does smoke as dark as Rlngelmann Ho. 2 (I 24242). 2. A person shall not discharge...
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Proceedings, Volum 2

1963
...designated as No. 2 on the Ringelmann Chart, as published by the United States Bureau of Mines, or (&) Of such opacity as to obscure an observer's view to a degree equal to or greater than does smoke described in subsection (a) of this section. Directly involved...
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Information Circular

1950
...of Los Angeles covers this by adding to the shade limitation of No. 2 on the Ringelmann chart, "or of such opacity as to obscure an observer's view to a degree equal to or greater than does smoke " of the No. 2 shade limitation. Many objections have been raised...
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