No use otherwise allowed shall be permitted within any use district which does not conform to the following standards of use, occupancy and operation, which standards are hereby established as the minimum requirements maintained within said area.
A. 
Standards.
(1) 
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. Measurements shall be made using the flat network of the sound-level meter.
(a) 
At no point along the boundary of a residential district or along an adjacent lot shall the sound-pressure level of any operation or plant exceed the decibel limits in the octave band designated below:
[1] 
Daytime hours, 7:00 a.m. to 10:00 p.m., local time:
Maximum Permitted Sound Level
(Decibels)
Octave Band Preferred Center Frequency (hertz)
Along Residence District Boundaries
Along Adjacent Lot Boundaries
31.5
76
79
63
71
74
125
65
69
250
57
64
500
51
58
1,000
45
52
2,000
39
47
4,000
34
43
8,000
32
40
[2] 
Nighttime hours: 10:00 p.m. to 7:00 a.m., local time:
Maximum Permitted Sound Level (decibels)
Octave Band Preferred Center Frequency (hertz)
Along Residence District Boundaries
Along Adjacent Lot Boundaries
31.5
72
79
63
67
74
125
61
68
250
53
60
500
47
53
1,000
41
47
2,000
35
41
4,000
30
36
8,000
28
34
[3] 
Impact noises shall not exceed the following peak intensitities:
Maximum Permitted Sound Level (decibels)
Octave Band Preferred Center Frequency (hertz)
Along Residence District Boundaries
Along Adjacent Lot Boundaries
Overall peak
80
86
(2) 
Exceptions. The maximum permissible sound levels by the receiving land use category as listed in the previous table shall not apply to any of the following noise sources:
(a) 
The emission of sound for the purpose of alerting persons to the existence of an emergency.
(b) 
Emergency work to provide electricity, water or other public utilities when public health or safety is involved.
(c) 
Explosives and construction operations.
(d) 
Motor vehicle operations.
(e) 
Surface carriers engaged in commerce by railroad.
(f) 
The unamplified human voice.
A. 
Standards.
(1) 
No industrial operation or activity shall cause at any time and at any point along the nearest adjacent lot line ground-transmitted vibrations in excess of the limits set forth below. Vibration (the periodic displacement, measured in inches, of earth) shall be measured with a three-component measuring instrument and shall be expressed as displacement in inches.
Frequency
(cycles per second)
Maximum Permitted Displacement
(inches)
0 to 10
0.0008
10 to 20
0.0005
20 to 30
0.0002
30 to 40
0.0002
40 and over
0.0001
(2) 
Exceptions. The following uses and activities shall be exempt from the vibration level regulations:
(a) 
Vibrations not directly under the control of the property user.
(b) 
Vibrations emanating from construction and maintenance activities between 7:00 a.m. and 9:00 p.m. Such activities are those which are nonroutine operations accessory to the primary activities and which are temporary in nature or conducted infrequently.
(c) 
Transient vibrations of moving sources, such as automobiles, trucks, airplanes and railroads.
A. 
Standards.
(1) 
No flammable or explosive liquids, solids or gases shall be stored in bulk above the ground, except for tanks or drums of fuel directly connecting with energy devices, heating devices or appliances located and operated on the same lot as the tanks or drums of fuel.
(2) 
All outdoor storage facilities for fuel, raw materials and products stored outdoors, including those permitted in the above subsection, shall be enclosed by a fence of a type, construction and size as shall be adequate to protect and conceal the facilities from any adjacent properties. Fencing shall not only encompass the question of safety but also of screening, and the screening shall preferably be evergreens. All National Occupational Safety and Health Administration regulations shall be met.
(3) 
No materials or wastes shall be deposited upon a lot in such form or manner that they may be transported off by natural causes or forces, nor shall any substance which can contaminate a stream or watercourse or otherwise render such stream or watercourse undesirable as a source of water supply or recreation or which will destroy aquatic life be allowed to enter any stream or watercourse. Applicable Department of Environmental Protection regulations shall apply.
(4) 
All materials or wastes which might cause fumes or dust or which constitute a fire hazard or which may be edible or otherwise attractive to rodents or insects shall be stored outdoors only if enclosed in containers adequate to eliminate such hazards. Applicable County Department of Health and National Occupational Safety and Health Administration regulations shall apply.
All methods of sewage and waste treatment and disposal shall be approved by the Pennsylvania Department of Environmental Protection. Any sewage or waste discharged into the public sewer system shall also be approved by the Sanitary Water Board and the Municipality of Norristown. The standards of such regulations or the following, whichever is more restrictive, shall apply.
A. 
Standards.
(1) 
There shall be no discharge of any toxic substance, gasoline, benzene, naphtha, fuel, oil or other flammable or explosive liquid, solid or gas, any liquid having a temperature higher than 150° F. or any matter containing any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure or any solid or viscous substance capable of causing obstruction in or other interference with the proper operation of a sewage treatment plant or any liquid having a pH lower than 5.0 or higher than 9.0 or having any other corrosive property capable of causing damage or hazard to structures, equipment or personnel or material which would be harmful to the treatment of sewage.
(2) 
Acidity and alkalinity of wastes shall be neutralized with a pH of 7.0 as a daily average on a volumetric basis, with a temporary variation of a pH of 5.0 to 9.0.
(3) 
Wastes shall contain no cyanides and no halogens and shall not contain more than 10 parts per million of the following gases: hydrogen sulfide, sulfur dioxide and nitrogen dioxide.
(4) 
Wastes shall not contain any insoluble substances in excess of 10,000 parts per million nor exceed a daily average of 500 parts per million nor fail to pass a No. 8 sieve nor have a dimension greater than 0.25 inch.
(5) 
Wastes shall not have:
(a) 
A chlorine demand in excess of 15 parts per million.
(b) 
Phenols in excess of 0.0005 part per million.
(c) 
Grease, fats or oils or any oily substance in excess of 100 parts per million or exceeding a daily average of 25 parts per million.
A. 
Standards.
(1) 
Dust, dirt, smoke, vapor, gas, odor, glare and heat control.
(a) 
The air pollution control regulations promulgated by the State Air Pollution Control Act of January 8, 1960, P.L. 2119, as amended,[1] shall be used to control the emissions of dust, dirt, smoke, vapors, gases, odors, glare and heat in the Municipality.
[1]
Editor's Note: See 35 P.S. § 4001 et seq.
(b) 
The regulations are part of Title 25, Rules and Regulations, Department of Environmental Protection, Subpart C, Protection of Natural Resources, Article III, Air Resources.
(2) 
Light, glare and heat control. No use shall carry on an operation that will produce light, heat or glare perceptible beyond the property line of the lot on which the operation is situated.
Every use requiring power shall be so operated that any service lines, substation, etc., shall conform to the highest applicable safety requirements and shall be constructed, installed, etc., so that it will be an integral part of the architectural features of the plant or, if visible from abutting residential properties, shall be concealed by evergreen planting.
Activities which may emit radioactivity beyond enclosed areas shall comply with the codes of the Pennsylvania Department of Environmental Protection's Division of Radiology. The Federal Nuclear Regulatory Commission shall also regulate the control of radioactive material associated with any activity in the Municipality. No electrical disturbances, except from domestic household appliances, shall be permitted to adversely affect any equipment at any time other than the equipment creating the disturbance.