Chapter 27.56 — M1 DISTRICTS

The Manufacturing District is intended to create and maintain light manufacturing, warehousing, and distribution facilities where air emissions, noise generation, and hazardous materials handling are limited.

The following uses are permitted:

• (a) Permitted uses in commercial districts, except residential uses which are not permitted;

• (b) Assembly, production, processing, cleaning, testing, or repair of products;

• (c) Contractor or construction shops;

• (d) Laboratories; medical, dental, research, experimental, and testing;

(e) Residential dwelling units for security personnel when located on the premises where they are employed;

• (f) Wholesale and warehousing; excluding storage of inflammable liquids;

• (g) Accessory uses to principle uses; and

• (h) Other compatible uses as determined by the zoning administrator.

The following uses may also be permitted subject to approval of a special use permit:

(a) Special uses allowed in commercial districts except that residential uses and secondary units are not permitted;

(b) Storage of impounded motor vehicles on an open lot;

• (c) Theaters, drive-in;

• (d) Wholesale storage of inflammable liquids; and

(e) Other compatible uses as determined by the zoning administrator subject to the approval of a special use permit.

In the M1 districts, the permitted uses in this chapter are subject to the following:

(a) Any assembly production, processing, cleaning, servicing, testing, repair or storage of goods, materials, or products shall conform with the performance standards set forth in this chapter.

(b) All business, production, servicing and processing uses, including storage, equipment, materials, supplies and commercial vehicles for off-site businesses shall take place within completely enclosed buildings, except as may be otherwise specifically authorized.

Open off-street loading facilities and open off-street parking facilities for the storage of motor vehicles may be unenclosed throughout the district except for such screening of parking and loading facilities as may be required under the provisions of Chapter 27.64.

(c) All parked and impounded motor vehicles in an open lot shall have such lot completely enclosed by a solid wall or fence, including doors or gates thereto, not less than six feet in height. All such motor vehicles shall be parked or placed in an orderly manner within such fenced lot with clear and adequate passageways to allow free and unobstructed access and movement of the fire department in case of fire. The manner of handling and keeping impounded motor vehicles shall, at all times, be subject to the approval of the chiefs of the police and fire departments.

(d) Such conditions relating to noise emissions, lighting and hours of operation that are reasonably necessary in the interests of the public health, welfare and safety.

(e) When granting a special permit for the storage of impounded motor vehicles, the Planning Commission shall specify the expiration date of said permit and the conditions to be met for its renewal, and may specify periodic reviews thereof.

Automobile parking and loading facilities shall be provided as required, or permitted, in Chapter 27.64.

Maximum floor area ratio of buildings and structures on a zoning plot shall not exceed 1.0.

Building height shall not exceed the standards set forth on the Building Height Plan of the General Plan.

A front yard of not less than fifteen feet in depth shall be provided. However, where lots within the same block and comprising forty percent of the frontage on the same street are already developed on the effective date of this code with front yards with an average depth of less than fifteen feet, then such average depth shall be the required front yard depth for such frontage in said block.

A side yard shall be provided along each side lot line. Each side yard shall be not less in width than ten percent of the lot width but need not exceed ten feet in width.

Buffers shall be provided in accordance with the following regulations:

(1) Parcels fronting on a street with at least eighty (80) percent of the frontage directly across the street between two (2) consecutive intersecting streets in a residential district, shall provide a

front yard pursuant to the front yard requirements of the residential district;

(2) Side parcel lines coinciding with a side or rear parcel line of a property in a residential district shall provide a side yard equal to the minimum required side yard in the residential district;

(3) Rear parcel lines coinciding with a side parcel line of a parcel in a residential district shall provide a rear yard equal in dimension to the minimum required side yard in the residential district;

(4) Rear parcel lines coinciding with a rear parcel line of a property in a residential district shall provide a rear yard not less than ten (10) feet in depth;

(5) Extensions of front or side parcel lines coinciding with the front parcel line of a property in a residential district, shall provide a yard equal in depth to the minimum required front yard of the residential district for a distance of at least twenty-five (25) feet, including the width of any intervening alley from such the residential parcel line;

(6) Required yards shall be unobstructed from the ground level to the sky;

(7) Fast-food establishments shall be separated from each other and from residential districts by no less than one hundred (100) feet measured from the nearest parcel lines. However, multiple fast-food establishments may be closer than one hundred (100) feet in a shopping center;

(8) Districts adjacent to an open space district shall provide at least a fifteen (15) foot yard.

(9) Required fences or walls. A solid fence or solid wall is required for parcels abutting residential districts as provided in Section 27.84.030 of this title.

Any use established hereafter in an M1 district, shall be so operated as to comply with the performance standards set forth as follows in Section 27.56.090 through 27.56.150.

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, Inc.,

New York, N.Y. Measurements shall be made using the flat network of the sound level meter. Impulsive type noises shall be subject to the performance standards hereinafter prescribed provided that such noises shall be capable of being accurately measured with such equipment. Noises capable of being measured, for the purpose of this title, shall be those noises which cause rapid fluctuation of the needle of the sound level meter with a variation of no more than plus or minus two decibels. Noises incapable of being so measured, such as those of an irregular and intermittent nature, shall be controlled so as not to become a nuisance to adjacent uses.

At no point either on the boundary of a residence district or a commercial district or at one hundred twenty-five feet from the nearest property line of a plant or operation, whichever distance is greater, shall the sound pressure level of an individual operation or plant (other than the operation of motor vehicles and other transportation facilities) exceed the decibel levels at the designated octave bands shown hereafter for the districts indicated.

(Prior code § 149.02(H)(1).)

Cross References

Section 27.56.080

(a) No stack shall emit more than ten smoke units during any one hour, nor shall smoke of a density in excess of Ringelmann No. 2 be emitted. For the purposes of grading density of

emissions, the Ringelmann chart published and used by the United States Bureau of Mines shall be employed.

(b) The rate of emission of particulate matter from all sources within the boundaries of any lot shall not exceed a net figure of one pound per acre of lot area and during any one hour, computed in accordance with the procedures set forth in Chapter 27.76.

(c) Dust and other forms of air pollution borne by the wind from such sources as storage areas, yards, roads, and so forth within lot boundaries shall be kept to a minimum by appropriate landscaping, paving, oiling or other acceptable means. The emission of particulate matter from such sources shall conform with the requirements of (b) above.

The emission of odorous gases or other odorous matter from any property in such concentrations as to be readily detectable at any point along the boundaries of said property or in such concentrations as to create a public nuisance or hazard beyond such boundaries is prohibited.

Any process which may involve the creation or emission of any odors shall be provided with a secondary safeguard system, so that control will be maintained if the primary safeguard system should fail. There is established as a guide in determining such quantities of offensive odors, Table III, "Odor Thresholds," in Chapter 5, "Air Pollution Abatement Manual," by Manufacturing Chemists Association, Inc., Washington, D.C.

Any process or equipment which produces disturbing, earth shaking vibrations shall be set back at least three hundred feet from the property boundaries on all sides. However, in no case shall such vibrations be allowed to create a public nuisance or hazard beyond the property boundaries.

No use on any property shall discharge across the boundaries of said property toxic or noxious matter in such concentrations as to be detrimental to or endanger the public health, safety, comfort or welfare, or cause injury or damage to other property or business.

Any operation producing intense glare or heat shall be performed within a completely enclosed building and effectively screened in such a manner as not to create a public nuisance or hazard along property boundaries.

Fire and explosive hazards shall be subject to the fire prevention regulations in Chapter 23.28.

(Prior code § 149.02(H)(7).) Cross References Section 27.56.080