The purpose of the light industrial (ML) zoning district is to provide for, and regulate, certain industrial uses which are incompatible with commercial and residential uses but perform important storage, manufacturing or servicing functions for such commercial and residential uses in the City. The property in this zone should be located near central business areas, near arterial traffic routes, along railroad lines, or where specialized services for residential areas should be concentrated. Activities and hazardous materials that may be used in the light industrial zoning district are specifically incompatible with schools, daycare centers, convalescent care centers and other sensitive receptors and such sensitive receptors are prohibited from this zoning district.

The purpose of the Industrial Park (MP) zoning district is to provide regulations for parcels or combinations of parcels of land of twenty-five acres or more on which development of light industrial parks is deemed appropriate.

(Ord. 2085, § 2 (part), 2011; Ord. 1601, Exh. A (part), 1992)

No building, structure, or land shall be used, and no building or structure shall be erected, structurally altered, or enlarged in an ML and MP zone, otherwise than in conformance with the provisions of this chapter and other applicable provisions of this title.

(Ord. 2085, § 2 (part), 2011; Ord. 1601, Exh. A (part), 1992)

Permitted, Conditional and Excluded Uses that may be conducted from property zoned Light Industrial (ML) or Planned Industrial (MP) are identified in Table 19.64.020.

(Ord. 2085, § 2 (part), 2011)

Prior to the erection of a new building or structure or enlargement or modification of an existing building, structure, or site (including landscaping and lighting) in an ML or MP zoning district, the applicant for a building permit must obtain permits in accord with Chapter 19.12.

(Ord. 2085, § 2 (part), 2011)

No use shall be allowed which is or will be offensive by reason of the emission of dust, gas, smoke, noise, fumes, odors, bright lights, vibrations, nuclear radiation, radio frequency interference, or otherwise. Every use shall be operated in such manner that the volume of sound inherently and recurrently generated shall not exceed sixty-five decibels during the day and fifty- five decibels at night, at any point on the property line on which the use is located, or sixty decibels during the day and fifty-five decibels at night, at any point on the property line on which the use is located where such property line abuts property that is zoned for residential purposes. Noise and sounds shall be appropriately muffled in such manner so as not to be objectionable as to intermittent beat, frequency, or shrillness.

Provided further that prior to issuance of a building permit the Building Inspector may require evidence that adequate controls, measures, or devices have been provided to insure and protect the public interest, health, comfort, convenience, safety and general welfare from such nuisances.

Emissions of noise, vibrations, radiation, light, smoke, fumes or gas, odor, dust and toxic waste shall be limited to quantities indicated in this section. The limitations shall apply at any point outside the boundary of each lot in an ML zone, the boundary assumed, for the purpose of this title, to extend in a vertical plane and below ground. In case of further subdivision or lot split, the limitations shall not apply outside any resulting lot.

1. Vibration. Vibrations in the nonaudible range shall not be of such intensity that they can be perceived without instruments.
2. Radiation. Electromagnetic radiation shall not result in perceptible disturbance of television or radio reception.
3. Light. In addition to the lighting standards in Chapter 19.102, all development shall meet the following lighting standards:
   1. The intensity of light at the boundary of each lot shall not exceed seventy-five footlamberts from a source of direct light, or one hundred footlamberts from a source of reflected light.
   2. The intensity of light at the boundary of an industrial zone, or an industrial area in a planned development (P) zone, shall not exceed fifty footlamberts from a source of direct light, or seventy-five footlamberts from a source of reflected light.
   3. In the event there is a conflict with Chapter 19.102, the less stringent lighting standards shall apply.
4. Smoke. No emission shall be permitted at any point, from any chimney or otherwise, of visible grey smoke of a shade equal to or darker than No. 1 on the Ringelmann Smoke Chart, as published by the U.S. Department of Interior, Bureau of Mines, Informational Circular 8333, May 1967; except that a visible grey smoke of a shade equal to No. 2 on the Ringelmann Smoke Chart may be emitted for four minutes in any thirty minutes.
5. Hazardous and Toxic Materials. The use, handling, storage, and transportation of toxic and hazardous materials shall comply with the provisions of the California Hazardous Materials Regulations (California Administrative Code, Title 22, Division 4). The use, storage, manufacture and disposal of hazardous materials shall be regulated and monitored according to the standards established by the U.S. Environmental Protection Agency (EPA), the California Environmental Protection Agency (Cal/EPA) and any delegated government agencies.
6. Odor. No emission of odorous gases or other odorous matter shall be permitted in such quantities as to be readily detectable without the aid of instruments at the boundaries of the lot or in such concentrations as to create a public nuisance or hazard beyond such boundaries. 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, Odors Thresholds, in Chapter 5 of Air Pollution Abatement Manual, copyrighted in 1951 by Manufacturing Chemists Association, Inc., Washington, D.C.
7. Fly Ash, Dust, Fumes, Gases and Other Forms of Air Pollution. No emission shall be permitted which can cause any damage to health, animals, vegetation or other forms of property, or that will result in the collection of heavy gases at ground level. No emission shall be permitted in excess of fifty percent of the standards specified in Table I, Chapter 5 of Industrial Hygiene Standards, Maximum Allowable Concentrations of the Air Pollution Abatement Manual, copyrighted in 1951 by Manufacturing Chemists Association, Inc., Washington, D.C. In no event shall any emission, from any chimney or otherwise, exceed one-tenth of a grain (0.1 grain) per cubic foot of the conveying gas. For measurement of the amount of particles in gases resulting from combustion, standard corrections shall be applied to a stack temperature of five hundred degrees Fahrenheit and fifty percent excess air.
8. Wastes. No discharge shall be permitted into any public street or sewer, private sewage disposal system, stream, body of water, or into the ground, of any materials of such nature or temperature as can contaminate any water supply, interfere with bacterial processes in sewage treatment, corrode or otherwise damage sewers or pipelines, or otherwise cause the emission of dangerous or offensive elements, except in accordance with standards approved by the California Environmental Protection Agency (Cal/EPA) and any other governmental agency having jurisdiction over the activities.

(Ord. 21-2225, Att. A (§ 5), 2021; Ord. 2085, § 2 (part), 2011; Ord. 1601, Exh. A (part), 1992)

Table 19.72.060 sets forth the rules and regulations pertaining to the development of structures on property zoned Light Industrial (ML and ML-rc) and Industrial Park (MP). In ML-rc and ML-fa zones, if no standards are listed, the standard reverts to the ML zoning standards.

(Ord. 2085, § 2 (part), 2011)