D.C. Mun. Regs. r. 11-804
All uses established in a C-M District under authority of § 801.7 and any uses accessory to those uses shall be operated so as to comply with the standards of external effects in this section.
The volume of sound inherently and recurrently generated shall not exceed the standards in §§ 804.3 through 804.6 at any point along the boundaries of the zone district in which the use is located.
Sound levels shall be measured with a sound level meter and associated octave band filter manufactured according to standards prescribed by the American Standards Association on May 12, 1958.
Objectionable sounds of an intermittent nature shall be controlled so as not to become a nuisance to adjacent uses.
[Deleted]
Except as provided in § 804.7, maximum sound pressure levels shall not exceed those provided in the following table:
OCTAVE BAND (cycles per second) | MAXIMUM SOUND PRESSURE LEVEL IN DECIBELS (0.0002 dynes per square centimeter) |
0-74 | 72 |
75-149 | 67 |
150-299 | 59 |
300-599 | 52 |
600-1,199 | 46 |
1,200-2,399 | 40 |
2,400-4,800 | 34 |
Above 4,800 | 32 |
Where a C-M District abuts an M District, the standards in § 825 shall apply along the zone boundary separating the C-M and M Districts.
The emission of any smoke from any source to a density greater than that density described as No. 2 on the Ringelmann Smoke Chart shall be prohibited. The Ringelmann Smoke Chart, published by the Bureau of Mines, U.S. Department of the Interior, in Information Circular 8333, shall be adopted by reference and made a part of this title.
The emission of any odorous gases or other odorous matter or steam in quantities that are offensive or noisome at any point along the boundaries of the zone district in which the use is located shall be prohibited.
No noxious, toxic, or corrosive fumes or gases shall be permitted to escape or to be discharged from any use permitted in a C-M District.
No objectionable amounts of cinders, dust, or fly-ash shall be permitted to escape or to be discharged from any use permitted in a C-M District.
No direct or reflected glare or heat from any source shall be detectable in objectionable amounts beyond the boundaries of the zone district in which the use is located.
Every use shall be operated so that ground vibration inherently and recurrently generated is not perceptible, without instruments, at any point along any boundary of the zone district in which the use is located.
Where an Electronic Equipment Facility (EEF) use is proposed in a C-M District on a lot that abuts a Residence (R), Special Purpose (SP), Waterfront (W), or Mixed Use (CR) zoned property, the following conditions shall apply:
D.C. Mun. Regs. r. 11-804