 | United States. Congress. Senate. Committee on Public Works - 1967 - 1140 sider
...published by the United States Bureau of Mines, or b. Of such opacity as to obscure an observer's view to t degree equal to or greater than does smoke described in subsection (a) of this Rule. RULE 51. NUISANCE. A person shall not discharge from any source whatsoever such quantities of... | |
 | United States. Congress. House. Committee on the District of Columbia - 1967 - 112 sider
...which is (A) darker in shade than that designated as number 1 on the Ringelmann Smoke Chart or (B) of such opacity as to obscure an observer's view to a degree greater than does smoke designated as number 1 on the Ringelmann Smoke Chart, except that if a person... | |
 | United States. Congress. House. Committee on the District of Columbia - 1967 - 1294 sider
...which is (A) darker in shade than that designated as number 1 on the Ringelmann Smoke Chart or (B) of such opacity as to obscure an observer's view to a degree greater than does smoke designated as number 1 on the Bingelmann Smoke Chart, except that if a person... | |
 | United States. Congress. House. Committee on the District of Columbia - 1967 - 1378 sider
...which is (A) darker in shade than that designated as number 1 on the Ringelmann Smoke Chart or (B) of such opacity as to obscure an observer's view to a degree greater than does smoke designated as number 1 on the Ringelmann Smoke Chart, except that if a person... | |
 | United States. Congress. House. Committee on the District of Columbia - 1967 - 120 sider
...which is (A) darker in shade than that designated as number 1 on the Ringelmann Smoke Chart or (B) of such opacity as to obscure an observer's view to a degree greater than does smoke designated as number 1 on the Ringelmann Smoke Chart, except that if a person... | |
 | United States. Congress. Senate. Committee on Public Works - 1969 - 1468 sider
...said chart, if such standards of measurement are approved by and acceptable to the Commission. (b) Of such opacity as to obscure an observer's view to a degree equal to or greater than do air pollutants described in subsection 7.06(1) (a). (2) Particulate Matter. No person shall cause,... | |
 | United States. Congress. Senate. Committee on Public Works - 1969 - 1718 sider
...said chart, if such standards of measurement are approved by and acceptable to the Commission. (b) Of such opacity as to obscure an observer's view to a degree equal to or greater than do air pollutants described in subsection 7.06 (1) (a) . (2) Particulate Matter. No person shall cause,... | |
| |
A. As dark or darker in shade as that designated as No. 2 on the 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 does smoke described in subsection... 
