The M-1 light manufacturing zone is intended to provide for the development of industrial uses which include fabrication, manufacturing, assembly or processing of materials that are in already processed form and which do not in their maintenance, assembly, manufacture or plant operation create smoke, gas, odor, dust, sound, vibration, soot or lighting to any degree which might be termed obnoxious or offensive to persons residing in or conducting business in either this or any other zone.
(Ord. 1719 § 1, 2010)
In the M-1 zone, the following accessory uses are permitted:
A. 
Commercial uses customarily incidental and directly related to the service or operation of the permitted industrial uses, based upon a planning commission interpretation;
B. 
Administrative research or sales office related to a permitted industrial use, excluding sales limited to retail operations only.
(Ord. 1719 § 1, 2010)
In the M-1 zone, the following standards of development shall apply:
A. 
Building Height.
1. 
For M-1 property not abutting or across the street from a residential zone two and one-half stories and not to exceed thirty-five feet unless the building sets back from each street, alley and lot line at least one foot for each three feet of height above the two and one-half stories or thirty-five feet. No building shall exceed seventy-five feet or six stories in height.
2. 
For M-1 property abutting or across the street from a residential zone:
a. 
Between front yard setback and front one hundred feet, no building or structure erected shall have a height greater than thirty-five feet or two stories.
b. 
To the rear of the one-hundred-foot distance from the front lot line, and within fifty feet of a rear property line when such line is a zone boundary with a residential zone, no building or structure shall have a height greater than fifty feet.
3. 
Roof structures for the housing of elevators, stairways, tanks, ventilating fans or similar equipment required to operate and maintain the building, and fire or parapet walls, skylights, towers, flagpoles, chimneys, smokestacks, silos, water tanks or wireless masts or similar structures may be erected above the height limits prescribed in this subsection; provided, that the same may be safely erected and maintained at such height in view of the surrounding conditions and circumstances. No roof structure, or any space above the height limit, shall be allowed to provide additional floor space.
B. 
Front Yard.
1. 
There shall be a front yard of not less than fifteen feet. In cases where a structure is built adjacent to this setback and the building height exceeds twenty-five feet, the front yard setback shall be increased to twenty feet in front of the structure.
Exception: Existing properties with approved building structures are exempt from this requirement but must maintain existing front yard setbacks. No new improvements will be permitted within the front fifteen or twenty-foot setback area based on the location and height of the structures on the property. Total new construction shall be limited to fifty percent of the assessed value of the existing structures as determined by the county assessor's office.
2. 
Across the street from a residential zone:
a. 
There shall be a front yard of not less than twenty-five feet extending across the full width of the lot, this yard to be a buffer.
b. 
Standard residential curbs, gutters and sidewalks shall be installed and parkway trees shall be planted in the parkway area.
3. 
When a M-1 zone fronts on a block frontage which is in more than one zone, the most restrictive front yard requirements shall apply.
4. 
In no case shall a building or structure be located less than fifty feet from any boundary which separates a M-1 zone from any residential zone.
C. 
Side Yard. These provisions shall not apply to those lots on record on the effective date of this amendment (September 2, 1960) in an existing industrial district where such lots have a width or depth of less than one hundred fifty feet.
1. 
Across a street from a manufacturing or commercial zone there shall be a yard of not less than ten feet extending along the full depth or width of the lot. If the yard is on an alley, it may be used for loading.
2. 
Across a street from a residential zone:
a. 
There shall be a yard of not less than twenty-five feet extending along the full depth or width of the lot, this yard to be a buffer.
b. 
Standard residential curbs, gutters and sidewalks shall be installed, and parkway trees shall be planted in the parkway area.
3. 
Across an alley from a residential zone:
a. 
There shall be a yard of not less than forty-five feet measured from the opposite side of the alley, extending along the full depth or width of the lot, this yard to be a buffer.
b. 
Such yard may also be used for storage providing the entire storage area is enclosed by a solid masonry wall six feet in height and that no materials stored are at a height greater than the height of the enclosing wall.
4. 
On a boundary between the M-1 zone and residential zone, which is not a street, highway or alley:
a. 
There shall be a yard of not less than twenty-five feet extending along the full depth or width of the lot, this side yard to be a buffer.
b. 
There shall be a solid masonry wall six feet in height on the property line abutting the residential zone.
c. 
The entire yard area enclosed by the wall may be used for parking or for storage, providing that no materials stored in such yard shall be at a height greater than the height of the enclosing wall.
5. 
When a M-1 zone sides or rears on a block frontage which is in more than one zone, the most restrictive yard requirements shall apply.
6. 
In no case shall a building or structure be located less than fifty feet from any boundary which separates a M-1 zone from any residential zone.
D. 
Rear Yard. The side yard requirements of subsection C of this section shall apply.
E. 
The maximum intensity of development shall be equal to or less than a floor area ratio of eighty percent.
F. 
Usable Yard Area. None.
G. 
Parking and Loading. See Chapter 18.14, Off-Street Parking Requirements.
(Ord. 1719 § 1, 2010; Ord. 1750 § 3, 2014)
In the M-1 zone, the following special development standards shall apply:
A. 
Distance between buildings on the same lot. None.
B. 
Walls and Fences. See Section 18.12.070 Fences, walls, and hedges and Section 18.12.080 Required walls.
C. 
Signs. See Chapter 18.23.
D. 
Design Review. In the M-1 zone design review is required as follows:
1. 
Design plans for the parking lot (new and rehabilitation), minor repair to the exterior of the building, walls and fences, minor exterior or site changes, exterior colors, installation of mechanical equipment, minor exterior building changes such as doors and windows, freestanding signs and neon sign, and similar projects shall be reviewed and approved by the director of community development or his/her designee, prior to the issuance of any building permits. The decision of the director may be appealed to the planning commission.
2. 
All new development, major remodeling or structural rehabilitation of more than twenty-five percent of the building area, and additions which will result in increased floor area, shall be subject to design review and approved by the planning commission in accordance with the requirements of Chapter 18.68 of this title.
E. 
Miscellaneous Requirements.
1. 
Performance Standards. All uses established or placed into operation after the effective date of this subsection (September 2, 1960) shall comply at all times thereafter with the following limitations or performance standards. All uses actually established and in operation on the effective date of this subsection shall be made to comply with the following limitations or performance standards on or before January 1, 1965 and shall comply at all times thereafter:
a. 
Fire and Explosion Hazards. All activities involving, and all storage of, flammable and explosive materials shall be provided with adequate safety devices against the hazard of fire and explosions and adequate firefighting and fire-suppression equipment and devices standard in industry. All incineration is prohibited.
b. 
Radioactivity or Electrical Disturbance. Devices which radiate radio-frequency energy shall be so operated as not to cause interference with any activity carried on beyond the boundary line of the property upon which the device is located. Radio-frequency energy is electromagnetic energy at any frequency in the radio spectrum between ten kilocycles and three million megacycles.
c. 
Noise.
i. 
The maximum sound pressure level radiated by any use or facility when measured at the boundary line of the property on which sound is generated shall not exceed the values shown in the following table:
Table 18.38.050.E.1.c.i
Octave-Band Range in Cycles per Second
Sound Pressure Level in Decibels 0.0002 dyne/cm2
Below 75
72
75—150
67
151—300
59
301—600
52
601—1200
46
1201—2400
40
2401—4800
34
Above 4800
32
ii. 
If the noise is not smooth and continuous or is not present between the hours of ten p.m. and seven a.m. one or more of the following corrections shall be applied to the octave levels specified in Table 18.38.050.E.1.c.i above:
Table 18.38.050.E.1.c.ii
 
Correction in Decibels
Daytime operation only
+ 5
Noise source operates less than 20% of any one-hour period
+ 5
Noise source operates less than 5% of any one-hour period
+10
Noise of impulsive character such as hammering
- 5
Noise of periodic character such as humming or screeching
- 5
iii. 
The sound pressure level shall be measured with a sound level meter and associated octave band analyzer conforming to standards prescribed by the American Standards Association as set forth in a pamphlet published by the association entitled, "American Standard Sound Level Meters for Measurement of Noise and Other Sounds No. Z 24.3," published in 1944, and in another pamphlet published by the same association entitled, "American Standard Specification for an Octave-Bank Filter Set for the Analysis of Noise and Other Sounds No. Z 24.10," published in 1953.
d. 
Vibration. Every use shall be so operated that the ground vibration inherently and recurrently generated is not perceptible, without instruments, at any point on any boundary line of the lot on which the use is located.
e. 
Emission of Dust, Heat and Glare. Every use shall be so operated that it does not emit dust, heat or glare in such quantities or degree as to be readily detectable on any boundary line of the lot on which the use is located.
f. 
Outdoor Storage and Waste Disposal. All outdoor storage facilities for fuel, raw materials and products shall be enclosed by a fence or wall adequate to conceal such facilities from adjacent properties. All outdoor storage facilities shall be paved pursuant to the surfacing standards established for off-street parking lots in Chapter 18.14, Off-Street Parking Requirements. No materials or wastes shall be deposited upon a subject lot in such form or manner that they may be transferred to the lot by natural causes or forces. All materials or wastes which might cause fumes or dust or which constitute a fire hazard or which may be edible by or otherwise be attractive to rodents or insects shall be stored outdoors only in closed containers.
g. 
Frontage on Street Required. Every building shall be located on a lot having frontage upon a dedicated street.
Exception: No building permits shall be issued on any lot not having frontage on a dedicated street until the applicant has applied for and secured a zone variance as per Chapter 18.76.
F. 
Transportation Demand Management.
1. 
All new development projects that are estimated to employ a total of two hundred fifty or more persons, including substantial building expansions, as determined in Chapter 18.20 is subject to this section.
2. 
All applicable developments shall provide a transportation demand management strategy plan pursuant to the requirements of Chapter 18.20.
(Ord. 1719 § 1, 2010; Ord. 1748 § 3, 2013; Ord. 1852, 12/4/2023)