A. 
Title. The provisions of this article shall be known as the "office and commercial zoning regulations" of this title.
B. 
Purpose. The purpose of office and commercial zones and the regulations applying to these zones include the following:
1. 
To provide appropriately located areas for professional offices, retail stores, service establishments, amusement establishments and other such offices and businesses offering various ranges of commodities and services to meet the needs of the Brentwood community;
2. 
To encourage the provision of attractive and stimulating surroundings that make Brentwood's office and retail areas enjoyable places in which to shop, work, walk and relax;
3. 
To provide opportunities for retail establishments and offices to cluster for the convenience of the public and for efficient business operation in mutually beneficial relationships to each other;
4. 
To protect retail areas from the intrusion of incompatible activities which might impair an area's appearance or functioning as a retail shopping area;
5. 
To protect retail properties, shoppers and other uses of retail areas from noise, vibration, smoke, odor, dust, dirt, heat, glare and heavy truck traffic, and from fire, explosion and other hazards;
6. 
To promote the differentiation and specialization among various types of shopping areas in order to promote the goals and purposes of the commercial element of the Brentwood general plan.
(Ord. 408, 1987)
These regulations shall apply to the CO, COB, COR, CR, C-1, C-2 and C-3 zones unless expressly provided otherwise, and are supplementary to the office and commercial zoning regulations of this title.
(Ord. 408, 1987)
The following development standards are applicable to the office and commercial zones unless expressly provided for otherwise within the regulations of each individual zone:
A. 
Zone Wall. Whenever a commercial zone abuts a residential zone or other noncommercial zone a masonry zone wall shall be constructed on the common property line separating the two zones in accordance with the following:
1. 
The wall shall have a minimum height of six feet except the maximum height in a required street frontage yard shall not exceed forty-two inches.
2. 
The height of the zone wall shall be measured from the average finish grade; if there is a difference in elevation to finish grade on each side of the wall, the height shall be measured from the top of a retaining wall or the higher of the two finish grades whichever is greater.
3. 
If the zone wall exceeds six feet in height, either berms or landscaping, and variations in setback shall be required, subject to design review.
4. 
If the commercial zone is separated from the residential zone by a public alleyway, the zone wall may be eliminated subject to design review approval.
B. 
Refuse Disposal Enclosure. All commercial facilities shall provide masonry refuse disposal enclosures to city standards and specifications.
C. 
Off-street Parking and Loading Facilities. All commercial facilities shall provide off-street parking and loading facilities in accordance with Chapter 17.620.
D. 
Illumination of Parking Facilities and Structures. All commercial facilities shall provide adequate lighting or illumination of parking facilities and structures in accordance with Chapter 17.620.
E. 
Open Storage or Display. Open storage and/or outdoor display of merchandise is prohibited in the commercial zones unless expressly provided for in an individual zone.
F. 
Advertising Signs. All signs are subject to the regulations of Chapter 17.640 and subject to design review.
G. 
Landscaping and Screening. All commercial facilities shall provide landscaping and screening in accordance with Chapter 17.630 of this title which is subject to design review.
H. 
Yards. All required yards shall be utilized for landscaping only, except for access drives to the property.
I. 
Security Measures. All commercial facilities shall provide security measures in accordance with city standards and subject to design review.
J. 
Energy Conservation. All commercial facilities shall, to the greatest extent possible, incorporate energy conservation measures in conformance with city standards and subject to design review.
K. 
Design and Site Development Review. All commercial facilities shall comply with Chapter 17.820.
L. 
Building and Roofing Materials. All commercial facilities should utilize those materials which have been recommended as acceptable material, subject to design review, and maintained on file within the planning department of the city of Brentwood.
(Ord. 408, 1987)
The following performance standards are applicable to the office and commercial zones unless expressly provided for otherwise within the regulations of each individual zone:
A. 
Noise.
1. 
At the property line, the maximum sound pressure level radiated in each standard octave band by any use or facility, other than transportation facilities or temporary construction work, shall not exceed the values for octave bands lying within the several frequency limits given in Table 1 of this section, after applying the corrections shown in Table 2 of this section.
2. 
The sound pressure level shall be measured with a sound level meter and associated octave band analyzer conforming to the standards prescribed by the American Standards Association.
3. 
American Standards Sound Level Meters for Measurement of Noise and Other Sounds, Z224.3-1994, American Standards Association, Inc., New York, NY and American Standard Specification for an Octave-Band Filter Set for the Analysis of Noise and Other Sounds, Z224.10-1953, or latest approved revision thereof, American Standards Association, Inc., New York, NY shall be used.
TABLE 1
Frequency Ranges Containing Standard Octave Bands in Cycles per Second
Octave Band Sound Pressure Level in Decibels re 0.0002 dyne/cm2
20—300
60
300—2400
40
Above 2,400
35
If the noise is not smooth and continuous and is not radiated between the hours of ten p.m. and seven a.m., one or more of the corrections in Table 2 of this section shall be applied to the octave band levels given in Table 1 of this section.
TABLE 2
Type or Location of Operation or Character of Noise
Correction in Decibels
Daytime operation only
5
Noise source operated less than:
20% of any one-hour period or
5
5% of any one-hour period
10
Noise of impulsive character, hammering, etc.
-5
Noise of periodic character, hum, screech, etc.
-5
B. 
Heat, Glare and Humidity.
1. 
Any operation producing intense heat shall be performed within a completely enclosed-building in such a manner as not to create a public nuisance or hazard along lot lines.
2. 
Any operation or activity producing glare shall be performed within a completely enclosed building and be conducted so that direct and indirect illumination from the source of light on the lot shall not cause illumination in excess of one-half foot-candle when measured at the lot line. Exposed sources of light shall be shielded and flickering or intense sources of light shall be controlled so as not to cause a nuisance a cross lot lines.
3. 
Any use producing humidity in the form of steam or moist air, or producing heat, shall be carried on in such a manner that steam, humidity or heat is not perceptible at any lot line.
C. 
Vibration. Any industrial operation or activity which shall cause at any time and at any point along the property line of the subject use, earth-borne vibrations which are discernible without the use of instruments is prohibited.
D. 
Fire, Safety and Explosion. All uses shall provide adequate safety devices against fire, explosion and other hazards and adequate firefighting and fire-suppression equipment in compliance with applicable fire prevention and building codes.
E. 
Soundproofing. Minimum soundproofing shall be required in buildings affected by noise generated by major thoroughfares, state highways, the railroad and other major generators of noise.
F. 
Solid and Liquid Waste.
1. 
No discharge at any point into public sewer, stream or bay or into the ground shall be permitted, except in accord with the standards approved by the state Department of Health, or standards specified in applicable local ordinances for similar uses of any materials of such nature or temperature as can contaminate any water supply, interfere with bacterial processes in sewage treatment, or otherwise cause the emission of dangerous or offensive elements.
2. 
No materials or wastes shall be deposited on any property in such form or manner that they may be transferred off the property by natural causes or forces.
3. 
Any wastes which might be attractive to rodents or insects shall be stored outdoors only in closed containers.
G. 
Electrical and Radioactive Radiation. No activities shall be permitted which emit dangerous radio activity at any point, or electrical disturbance adversely affecting the operation at any point of any equipment other than that of the creator of such disturbance.
H. 
Air Pollution. All uses shall comply with regulations of the San Francisco Bay area air pollution control district.
1. 
Smoke. For the purpose of determining the density or equivalent opacity of smoke, the Ringlemann Chart as published by the U.S. Bureau of Mines in Circular No. 7718 (August, 1955) shall be employed. The emission of smoke from any chimney, stack, vent, opening or combustion process shall not exceed Ringlemann No. 1.
2. 
Odors. No emission shall be permitted of odorous gases or other odorous matter in such quantities as to be readily detectable at the property line of the subject use.
3. 
Toxic and Noxious Matter. No use shall be permitted which creates any emission which endangers human health, can cause the damage to animals, vegetation or other property or which can cause soiling at any point beyond the boundaries of the site.
(Ord. 408, 1987)