 | United States. Congress. Senate. Committee on Public Works - 1971 - 956 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.-... | |
 | United States. Congress. Senate. Commerce - 1972 - 1402 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.... | |
 | Robert Stayton - 1980 - 136 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 .... | |
 | United States. Congress. Senate. Committee on the District of Columbia - 1967 - 2170 sider
...of emission whatsoever any air contaminant which is (a) darker in shade than that designated as No. 1 on the Ringelmann Smoke Chart or (b) of such opacity...to a degree greater than does smoke designated as No. 1 on the Ringel mann Smoke Chart: Provided however, that if a person can show to the satisfaction... | |
 | 1951 - 1100 sider
...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... | |
 | United States. Congress. Senate. Committee on Public Works - 1472 sider
...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... | |
 | 1963 - 470 sider
...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... | |
 | 1950 - 700 sider
...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... | |
 | United States. Congress. Senate. Committee on Commerce - 1972 - 1874 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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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. 
