§ 8-15

(a) “CNEL” means community noise equivalent level. (b) “dB” means decibel. (c) “dB(A)” means (A) weighted decibel. (d) “STC” means sound transmission class. (e) “Group R” means any residential land use, plus any other use generally considered incompatible with airport operations, such as churches, schools and hospitals. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) The purpose of these sections is to safeguard life, health, property and public welfare by establishing minimum requirements regulating the design, construction and modification of buildings in the vicinity of Ontario International Airport. These sections are not intended to abridge any safety or health requirements required under any other applicable codes or ordinances. (b) These sections define the procedures for implementing the sound insulation requirements set forth in the State Division of Aeronautics Noise Standards (California Code of Regulations, Title 21, Subchapter 6) and the State Building Code (California Code of Regulations, Title 24, § 3501). Based on these documents, acoustic insulation shall be provided within specified community noise equivalent level (CNEL) contours to ensure an interior CNEL (due to exterior noise) of forty-five (45) dB or less in all habitable rooms in both single and multifamily residential dwellings and in specified noise-sensitive nonresidential buildings. (§ 2, Ord. 2616, eff. June 20, 1996)

The provisions of this chapter shall apply to all Group R buildings (single and multifamily residential dwellings), as defined by the Uniform Building Code, within the most recent fourth quarter sixty (60) CNEL noise contour map of Ontario International Airport published by the City of Los Angeles Department of Airports and to specified nonresidential buildings within the sixty-five (65) CNEL of the airport. Group R buildings are not allowed to be constructed in the seventy-five (75) CNEL or greater noise contour on the latest annual map. This chapter is intended to supplement the provisions of the Uniform Building Code and in the case of conflict between this chapter and any other applicable codes, the more restrictive requirements shall be met. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Prescriptive design/construction standards are provided for the sound insulation of new construction or modification of Group R buildings located within the most recent fourth quarter sixty-five (65) annual CNEL contour. Within the most recent fourth quarter sixty (60) CNEL to the sixty-five (65) CNEL zone, Group R buildings that are proposed for construction or modification are not required to comply with the prescriptive sound insulation standards; however, a certified acoustical engineer must provide certification that planned building modification and construction will achieve at least the forty-five (45) CNEL standard for all habitable rooms. (b) Prescriptive design/construction standards are not provided for noise-sensitive nonresidential buildings (schools, churches and hospitals) that constitute incompatible land use within the sixty-five (65) CNEL contour; however, a certified acoustical engineer must provide certification that the planned construction or modifications will achieve the required noise environment. (c) Deviations from the specified building requirements (i.e., standards, materials and construction assemblies) provided in the building requirements herein are permissible only if all deviations are certified to comply with and achieve the forty-five (45) CNEL standard for every habitable room constructed or modified. All deviations require approval by the Building Official and certification by a certified acoustical engineer. Acoustic measurements will be conducted by a certified acoustical engineer to verify that the forty-five (45) CNEL standard is not exceeded for all habitable rooms incorporating deviations from the building requirements. (d) All new and modified residential construction within the sixty-five (65) CNEL contour is subject to post- construction/pre-occupancy acoustic measurement at the discretion of the Building Official. Occupation of all habitable rooms not achieving the required CNEL rating may be precluded until such time as acoustic modification of that room achieves at least the forty-five (45) CNEL standard. (§ 2, Ord. 2616, eff. June 20, 1996)

Addition or alteration of floor area may be made to existing Group R buildings within the sixty (60) CNEL noise contour but outside the seventy-five (75) CNEL contour without making the entire building comply with all the requirements of this chapter for new construction unless the cost of improvements is seventy-five (75) percent or more of the total assessed value of the structure, in which case the entire building shall be made to comply. No addition of habitable space shall be made to existing Group R buildings inside the seventy-five (75) CNEL contour unless the entire building is made to comply. All additions of separable habitable rooms, and all separable habitable rooms or areas that result from an expansion of the building, including both the newly expanded area and the pre-existing room or area, shall fully comply with the design and construction procedures and standards set forth in this Code. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Nonresidential noise-sensitive buildings within the most recent fourth quarter sixty-five (65) CNEL contour that are incompatible land uses under the State Noise Standards and described as schools, hospitals, and convalescent homes, churches, synagogues, temples, and other places of worship, and are proposed to be constructed or modified, shall be designed to provide an interior CNEL due to aircraft noise of forty-five (45) dB or less. (b) Additions to the buildings described in subsection (a) of this section shall comply with the requirements of § 8- 15.105. (§ 2, Ord. 2616, eff. June 20, 1996)

Article 2. Building Requirements for New Residential Construction in the 70 CNEL to 75 CNEL Noise Zone

(a) New walls that form the exterior portion of habitable rooms shall be constructed as follows: (1) Studs shall be at least four (4) inches in nominal depth; (2) Exterior finish shall be stucco, minimum seven-eighths () inch thickness, brick veneer, masonry, or any siding material allowed by this Code. Wood or metal siding shall be installed over one-half (½) inch solid sheathing; (3) Masonry walls with a surface weight of less than forty (40) pounds per square foot will require an interior supporting studwall that is finished as required by subsection (a)(6) of this section; (4) Wall insulation shall be at least R-11 glass fiber or mineral wool and shall be installed continuously throughout the stud space; (5) Exterior solid sheathing shall be covered with overlapping asphalt felt; (6) Interior wall finish shall be at least five- eighths ( 5/8 ) inch thick gypsum wallboard or plaster. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Openable windows. An openable windows in the exterior walls of habitable rooms shall have a laboratory sound transmission class rating of at least STC forty (40) dB and shall have an air infiltration rate of no more than 5 cubic feet per minute when tested according to ASTM E-283. (b) Fixed windows. All fixed windows in the exterior walls of habitable rooms shall: (1) Have a sound transmission class rating of at least STC forty (40) dB; or (2) Shall be five-eighths ( 5/8 ) inch laminated glass with an STC rating of forty (40) dB and shall be set in nonhardening glazing materials. (3) Shall be glass block at least three and one-half (3½) inches thick. (c) The total areas of glazing in rooms used for sleeping shall not exceed twenty (20) percent of the floor area. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Exterior hinged doors to habitable rooms that are directly exposed to aircraft noise and are facing the source of the noise shall be a door and edge seal assembly that has a laboratory sound transmission class of at least STC forty (40) dB. (b) Exterior hinged doors to habitable rooms that are not directly exposed to aircraft noise and do not face the source of the noise shall have a minimum STC rating of thirty-five (35) dB. (c) Sliding glass doors at habitable rooms shall not be allowed in walls that are directly exposed to aircraft noise. Sliding glass doors in walls that are not directly exposed shall have an STC rating of at least forty (40) dB. (d) Access doors from a garage to a habitable room shall have an STC rating of at least thirty (30) dB. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Roof rafters shall have a minimum slope of 4:12 and shall be covered on their top surface with one-half (½) inch solid sheathing and any roof covering allowed by this Code.

(b) Attic insulation shall be batt or blown-in glass fiber or mineral wool with a minimum R-30 rating applied between the ceiling joists. (c) Attic ventilation shall be: (1) Gable vents or vents that penetrate the roof surface that are fitted with transfer ducts at least six (6) feet in length that are insulating flexible ducting or metal ducts containing internal one (1) inch thick coated fiberglass sound- absorbing duct liner. Each duct shall have a lined ninety (90) degree bend in the duct so that there is no direct line-of- sight from the exterior through the duct into the attic; or (2) Noise control louver vents; or (3) Eave vents that are located under the cave overhang. (d) Ceilings shall be finished with gypsum board or plaster that is at least five-eighths ( 5/8 ) inch thick. Ceiling materials shall be mounted on resilient channels. (e) Skylights shall penetrate the ceiling by means of a completely enclosed light well that extends from the roof opening to the ceiling opening. A secondary openable glazing panel shall be mounted at the ceiling line or at a point that provides at least a four (4) inch space between the skylight glazing and the secondary glazing and shall be glazed with at least three-sixteenths (3/16) inch plastic or laminated glass. The weather-side skylight shall be any type that is permitted by the Building Code. The size of skylights shall be no more than twenty (20) percent of the roof area of the room. (§ 2, Ord. 2616, eff. June 20, 1996)

The floor of the lowest habitable rooms shall be concrete slab on grade. Wood framed floors for habitable rooms will be allowed when they are directly above another habitable room, a basement, garage, workshop, utility room or other nonhabitable rooms that are completely enclosed with wall materials allowed by this Code. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) A ventilation system shall be provided that will provide at least the minimum air circulation and fresh air supply requirements of this Code in each habitable room without opening any window, door or other opening to the exterior. All concealed ductwork shall be insulated flexible glass fiber ducting that is at least ten (10) feet long between any two points of connection. (b) Kitchen cooktop vent hoods shall be the nonducted recirculating type with no ducted connection to the exterior. (§ 2, Ord. 2616, eff. June 20, 1996)

Each fireplace shall be fitted with a damper at the top of the chimney that is operated from the firebox and shall have glass doors across the front of the firebox. (§ 2, Ord. 2616, eff. June 20, 1996)

Sec 8-15.208. Wall and ceiling openings.

Openings in the shell of the residence which degrade its ability to achieve an interior CNEL rating of forty-five (45) dB or less when all doors and windows are closed are prohibited unless access panels, pet doors, mail delivery drops,

air- conditioning, or other openings are designed to maintain the forty-five (45) CNEL (or less) standard in the room to which they provide access. (§ 2, Ord. 2616, eff. June 20, 1996)

Article 3. Building Requirements for New Residential Construction in the 65 CNEL to 70 CNEL Noise Zone

(a) New walls that form the exterior portion of habitable rooms shall be constructed as follows: (1) Studs shall be at least four (4) inches in nominal depth. (2) Exterior finish shall be stucco, minimum seven-eighths () inch thickness, brick veneer, masonry, or any siding material allowed by this Code. Wood or metal siding shall be installed over one-half (½) inch solid sheathing. (3) Masonry walls with a surface weight of less than forty (40) pounds per square foot will require an interior supporting studwall that is finished as required by subsection (a)(6) of this section. (4) Wall insulation shall be at least R-11 glass fiber or mineral wool and shall be installed continuously throughout the stud space. (5) Exterior solid sheathing shall be covered with overlapping asphalt felt. (6) Interior wall finish shall be at least five- eighths ( 5/8 ) inch thick gypsum wallboard or plaster. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Openable windows. All openable windows in the exterior walls of habitable rooms shall have a laboratory sound transmission class rating of at least STC thirty-five (35) dB and shall have an air infiltration rate of no more than .5 cubic feet per minute when tested according to ASTM E-283. (b) Fixed windows. All fixed windows in the exterior walls of habitable rooms shall be at least one- fourth (¼) inch thick and shall be set in nonhardening glazing materials. (c) The total area of glazing in rooms used for sleeping shall not exceed twenty (20) percent of the floor area. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Exterior hinged doors to habitable rooms that are directly exposed to aircraft noise and are facing the source of the noise shall be a door and edge seal assembly that has a laboratory sound transmission class of at least STC thirty- five (35) dB. (b) Exterior hinged doors to habitable rooms that are not directly exposed to aircraft noise and do not face the source of the noise shall have a minimum STC rating of thirty (30) dB. (c) Sliding glass doors at habitable rooms shall have glass that is one-fourth (¼) inch thick. (d) Access doors from a garage to a habitable room shall have an STC rating of at least thirty (30) dB. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Roof rafters shall have a minimum slope of 4:12 and shall be covered on their top surface with one-half (½) inch solid sheathing and any roof covering allowed by this Code.

(b) Attic insulation shall be batt or blown-in glass fiber or mineral wool with a minimum R-30 rating applied between the ceiling joists. (c) Attic ventilation shall be: (1) Gable vents or vents that penetrate the roof surface that are fitted with transfer ducts at least six (6) feet in length that are insulating flexible ducting or metal ducts containing internal one (1) inch thick coated fiberglass sound absorbing duct liner. Each duct shall have a lined ninety (90) degree bend in the duct so that there is no direct line-of- sight from the exterior through the duct into the attic; or (2) Noise control louver vents; or (3) Eave vents that are located under the eave overhang. (d) Ceilings shall be finished with gypsum board or plaster that is at least five-eighths ( 5/8 ) inch thick. (e) Skylights shall penetrate the ceiling by means of a completely enclosed light well that extends from the roof opening to the ceiling opening. A secondary openable glazing panel shall be mounted at the ceiling line and shall be glazed with at least three-sixteenths (3/16) inch plastic, tempered or laminated glass. (§ 2, Ord. 2616, eff. June 20, 1996)

The floor of the lowest habitable rooms shall be concrete slab on grade or wood framed floors. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) A ventilation system shall be provided that will provide at least the minimum air circulation and fresh air supply requirements of this Code in each habitable room without opening any window, door or other opening to the exterior. All concealed ductwork shall be insulated flexible glass fiber ducting that is at least ten (10) feet long between any two points of connection. (b) Kitchen cooktop vent hoods shall be the nonducted recirculating type with no ducted connection to the exterior. (§ 2, Ord. 2616, eff. June 20, 1996)

Each fireplace shall be fitted with a damper at the top of the chimney that is operated from the firebox and shall have glass doors across the front of the firebox. (§ 2, Ord. 2616, eff. June 20, 1996)

Openings in the shell of the residence which degrade its ability to achieve an interior CNEL rating of forty-five (45) dB or less when all doors and windows are closed are prohibited. Any access panels, pet doors, mail delivery drops, air- conditioning, or other openings must be designed to maintain the forty-five (45) CNEL or less standard in the room to which they provide access. (§ 2, Ord. 2616, eff. June 20, 1996)

Article 4. Building Requirements for New Residential Construction in the 60 CNEL to 65 CNEL Noise Zone

(a) All new Group R buildings in this noise zone shall be constructed with sound insulation or other means to achieve an interior CNEL level in all habitable rooms of no more than forty-five (45) dB. Reconstructed, remodeled or altered structures where the total cost of improvements is seventy-five (75) percent or more of the total assessed value of the structure must also meet this standard in the entire structure. (b) An engineer whose primary occupation is acoustical engineering (i.e., a certified acoustical engineer) shall certify in writing that the proposed new construction will comply with subsection (a) of this section prior to the issuance of a building permit. (§ 2, Ord. 2616, eff. June 20, 1996)

Article 5. Modification Requirements for Existing Residential Buildings in the 70 CNEL to 75 CNEL Noise Zone

(a) Exterior walls of habitable rooms that are directly exposed to aircraft noise shall be modified as follows: (1) Wood frame walls with exterior wood siding or other lightweight exterior finish shall be provided with a secondary interior stud wall that is supported at the ceiling and the floor and is separated from the surface of the interior wall by at least one-half (½) inch. The exposed surface of the secondary wall shall be finished with five- eighths ( 5/8 ) inch gypsum wallboard or plaster. (2) Wood frame walls with an exterior finish of stucco, brick veneer or other similar materials and with an interior finish that is less than one-half (½) inch thick shall be provided with an additional interior layer of five-eighths ( 5/8 ) inch gypsum wallboard. (3) Wood frame walls with an exterior finish of stucco, brick veneer or other similar heavy materials and with interior finish that is at least one-half (½) inch thick do not require modification. (4) Walls that are not directly exposed to aircraft noise or that are constructed principally of load bearing masonry will not require modifications. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Openable windows in habitable rooms shall be replaced with an openable window that has a laboratory sound transmission class rating of at least STC forty (40) dB and shall have an air infiltration rate of no more than .5 cubic feet per minute when tested according to ASTM E-283. (b) Fixed windows in habitable rooms shall be modified by one (1) of the following methods: (1) Replace the existing window with a window that has an acoustic rating of at least STC forty (40) dB; or (2) Replace the existing window with five- eighths ( 5/8 ) inch laminated glass that has an acoustic rating of STC forty (40) dB; (3) Add secondary removable glazing at the interior or exterior of the existing window. The secondary glazing shall be at least one-fourth (¼) inch float glass or laminated glass. The space between the two panes of glass shall be at least two (2) inches. (c) Fixed windows in habitable rooms that do not face the source of aircraft noise shall be replaced with three- eighths () inch laminated glass that has an acoustic rating of at least STC thirty-six (36) dB. (d) The joint between the wall opening and the new windows required in subsections (a) and (b)(1) of this section shall be continuously filled with glass fiber insulation and the exterior cover trim shall be continuously caulked to seal

the joint. (e) Fixed glass shall be set in nonhardening glazing materials. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Exterior hinged doors to habitable rooms that are directly exposed to aircraft noise shall be replaced with a door and seals that have a laboratory sound transmission class rating of at least STC forty (40) dB. A new rabetted frame shall be provided for each new door to replace the existing frame. (b) Exterior hinged doors to habitable rooms that are not directly exposed to aircraft noise shall be replaced with a door and seals that have a laboratory sound transmission class rating of at least STC thirty-five (35) dB. (c) Access doors from a garage to a habitable room shall be replaced with a door and seals that have an STC rating of at least thirty (30) dB. (d) Sliding glass doors in habitable rooms shall be fitted with a secondary sliding glass door installed on the exterior of the existing door and trimmed on all exposed sides with wood trim that is at least two (2) inches thick (nominal). Joints between the new door and the wall shall be continuously caulked. (e) The joint between the wall opening and the new door frame required in subsections (a) and (b) of this section shall be continuously filled with glass fiber insulation and the exterior cover trim shall be continuously caulked to seal the joint. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Accessible attics shall be insulated to achieve a minimum R-30 insulation value. (b) Attic vents shall be modified as follows: (1) Gable vents or vents that penetrate the roof surface shall be provided with noise control louver vents that meet the noise reduction levels shown in Table 15-A or transfer ducts that are at least six (6) feet in length. The ducts shall be of flexible insulated ducting with a bend so that there is no direct line-of-sight from the exterior through the duct into the attic. (2) Eave vents do not require modification. (c) Roofs with a slope of 2:12 or less and open beam ceilings shall be modified only if bearing walls are adequate to support the additional load stresses: (1) Existing roof covering shall be removed to expose sheathing. (2) Two (2) foot by six (6) foot rafters at twenty-four (24) inches on center shall be installed directly above the existing roof construction and supported by existing bearing walls, shall be insulated with R-19 fiberglass batts, and shall be covered with one-half (½) inch plywood sheathing. (3) New roofing shall be installed on the new construction that can be adequately supported by the new framing and existing bearing walls. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Vent openings to underfloor areas of wood framed floors shall be provided with acoustic vent baffles that meet noise reduction levels shown in Table 15-A. Vent baffles shall be fitted with one-fourth (¼) inch mesh screen.

Table 15-A

Octave Band Center Frequency, Hz Sound Transmission Loss, dB

Table 15-A

Octave Band Center Frequency, Hz Sound Transmission Loss, dB

125 4

250 5

500 6

1,000 9

2,000 10

4,000 12

(b) Underfloor access doors shall be nonvented plywood or other weatherproof material. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) A ventilation system shall be provided that will provide at least the minimum air circulation and fresh air supply requirements of this Code in each habitable room without opening any window, door or other opening to the exterior. All concealed ductwork shall be insulated flexible glass fiber ducting that is at least ten (10) feet long between any two points of connection. Exposed ductwork may be sheet metal with one (1) inch fiberglass duct liner and shall have a bend in the duct to avoid direct line-of-sight through the duct. (b) Kitchen cooktop vent hoods shall be replaced with nonducted recirculating vent hoods with no ducted connection to the exterior. (§ 2, Ord. 2616, eff. June 20, 1996)

Each fireplace shall be fitted with a damper at the top of the chimney that is operated from the firebox and shall have glass doors across the front of the firebox. (§ 2, Ord. 2616, eff. June 20, 1996)

Openings in the shell of the residence which degrade its ability to achieve an interior CNEL rating of forty-five (45) dB or less when all doors and windows are closed are prohibited. Any access panels, pet doors, mail delivery drops, air- conditioning, or other openings must be designed to maintain the forty-five (45) CNEL or less standard in the room to which they provide access. (§ 2, Ord. 2616, eff. June 20, 1996)

Article 6. Modification Requirements for Existing Residential Buildings in the 65 CNEL to 70 CNEL Noise Zone

Exterior walls in this noise zone do not require modification. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Openable wood frame windows in habitable rooms facing aircraft noise shall be replaced with new openable windows that have a minimum laboratory sound transmission class of at least STC thirty-five (35) dB if the existing window has: (1) Missing or insecure glazing putty or other glazing materials; or (2) Broken or cracked glass; or (3) Operating sash that is not securely supported in its frame or does not close tightly against the frame. (b) Openable wood frame windows that do not require replacement by subsection (a) of this section and that face aircraft noise shall be fitted with a secondary window that has an STC rating of at least twenty-five (25) dB. The secondary window may be mounted at the exterior or interior of the existing window and shall be completely trimmed and caulked in place. (c) Openable metal frame windows in habitable rooms facing aircraft noise shall be replaced with new openable windows that have a minimum laboratory sound transmission class of at least STC thirty-five (35) dB if the existing window has: (1) Jalousie louvered glass sash; or (2) Missing or insecure glazing putty or other glazing materials; or (3) Broken or cracked glass; or (4) Operating sash that is not securely supported in its frame or does not close tightly against the frame. (d) Openable metal frame windows in habitable rooms facing aircraft noise that do not require replacement by subsection (c) of this section shall be fitted with a secondary window that has an STC rating of at least twenty-five (25) dB with a spice of at least two (2) inches between the glass surfaces of the two windows. The secondary window may be mounted at the exterior or interior of the existing window and shall be completely trimmed and caulked in place. (e) Fixed windows in habitable rooms facing aircraft noise shall be glazed with one-fourth (¼) inch glass unless they are part of an acoustic window assembly. (f) Openable windows in habitable rooms that do not face aircraft noise shall be modified as follows: (1) Jalousie louvered glass windows shall be replaced with windows that have a laboratory sound transmission class of at least STC thirty-five (35) dB. (2) Windows that are not jalousie shall be fitted with a secondary window that has an STC rating of at least twenty-five (25) dB. (g) Fixed glass windows in habitable rooms that do not face aircraft noise shall be glazed with one-fourth (¼) inch glass. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Exterior doors in habitable rooms that are directly exposed to aircraft noise shall be modified as follows: (1) Hollow core or lightweight doors and doors with glazed openings shall be replaced with doors that have a minimum laboratory sound transmission class of at least STC thirty-five (35) dB. (2) Solid core or heavy panel doors shall be fitted with a drop seal at the sill and vinyl bulb seals at the jambs and head.

(b) Exterior doors in habitable rooms that are not directly exposed to aircraft noise shall be modified as follows: (1) Hollow core or lightweight doors and doors with glazed openings shall be replaced with doors that have a minimum laboratory sound transmission class of at least STC thirty (30) dB. (2) Solid core or heavy panel doors shall be provided with weather-stripping at the sill, head and jambs. (c) Access doors from a garage to a habitable room shall be replaced with a door and seals that have an STC rating of at least thirty (30) dB. (d) Sliding glass doors in this noise zone shall be glazed with one-fourth (¼) inch safety glazing. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) Accessible attics shall be insulated to achieve a minimum R-30 insulation value. (b) Attic vents shall be modified as follows: (1) Gable vents or vents that penetrate the roof surface shall be provided with noise control louver vents that meet the noise reduction levels shown in Table 15-A or transfer ducts that are at least six (6) feet in length. The ducts shall be of flexible insulated ducting with a bend so that there is no direct line-of-sight from the exterior through the duct into the attic. (2) Eave vents do not require modification. (c) Roofs with a slope of 2:12 or less and open beam ceilings shall be modified only if bearing walls are adequate to support the additional load stresses: (1) Existing roof covering shall be removed to expose sheathing. (2) Two (2) foot by six (6) foot rafters at twenty-four (24) inches on center shall be installed directly above the existing roof construction and supported by existing bearing walls, shall be insulated with R-19 fiberglass batts, and shall be covered with one-half (½) inch plywood sheathing. (3) New roofing shall be installed on the new construction that can be adequately supported by the new framing and existing bearing walls. (§ 2, Ord. 2616, eff. June 20, 1996)

Floors in this noise zone do not require modification. (§ 2, Ord. 2616, eff. June 20, 1996)

(a) A ventilation system shall be provided that will provide at least the minimum air circulation and fresh air supply requirements of this Code in each habitable room without opening any window, door or other opening to the exterior. All concealed ductwork shall be insulated flexible glass fiber ducting that is at least ten (10) feet long between any two points of connection. Exposed ductwork may be sheet metal with one (1) inch fiberglass duct liner and shall have a bend in the duct to avoid direct line-of-sight through the duct. (b) Kitchen cooktop vent hoods shall be replaced with nonducted recirculating vent hoods with no ducted connection to the exterior. (§ 2, Ord. 2616, eff. June 20, 1996)

Each fireplace shall be fitted with a damper at the top of the chimney that is operated from the firebox and shall have glass doors across the front of the firebox. (§ 2, Ord. 2616, eff. June 20, 1996)

Openings in the shell of the residence which degrade its ability to achieve an interior CNEL rating of forty-five (45) dB or less when all doors and windows are closed are prohibited. Any access panels, pet doors, mail delivery drops, air- conditioning, or other openings must be designed to maintain the forty-five (45) CNEL or less standard in the room to which they provide access. (§ 2, Ord. 2616, eff. June 20, 1996)

Article 7. Modification Requirements for Existing Residential Buildings in the 60 CNEL to 65 CNEL Noise Zone

(a) When modified, all Group R buildings in the sixty (60) CNEL to sixty-five (65) CNEL noise zone shall be constructed to achieve an interior CNEL level in all habitable rooms of no more than forty-five (45) dB. (b) An engineer whose primary occupation is acoustical engineering (i.e., a certified acoustical engineer) shall certify in writing that the existing building complies with subsection (a) of this section or that proposed modifications will cause the building to be in compliance. Written certification shall be submitted before issuance of a building permit for modifications. (§ 2, Ord. 2616, eff. June 20, 1996)

CHAPTER 16: STRUCTURED WIRING DESIGN AND CONSTRUCTION STANDARDS GOVERNING NEW CONSTRUCTION WITHIN THE CITY OF ONTARIO

CHAPTER 16: STRUCTURED WIRING DESIGN AND CONSTRUCTION STANDARDS GOVERNING NEW CONSTRUCTION WITHIN THE CITY OF ONTARIO

8-16.01 Purpose 8-16.02 Scope and applicability 8-16.03 Enforcement 8-16.04 Alternate materials and methods of construction 8-16.05 Residential wiring standards applicable to single-family dwellings 8-16.06 Residential wiring standards applicable to multiple dwelling units 8-16.07 Commercial wiring standards