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HomeMy WebLinkAboutOrdinance 360 CERTIFICATION I, Marcia McClure Torgerson, City Clerk of the City of Atascadero, hereby certify that the foregoing is the true and correct original of Ordinance No. 360 adopted by the Atascadero City Council at a regular meeting thereof held on September 28, 1999 and that it has been duly published pursuant to State Law. DATED: ` Marcia McClure Torgerson 70 City Clerk City of Atascadero, California ORDINANCE NO. 360 AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF ATASCADERO AMENDING CERTAIN SECTIONS OF TITLE 8 (BUILDING REGULATIONS) OF THE MUNICIPAL CODE, ADOPTING BY REFERENCE CERTAIN MODEL BUILDING CODES BY REFERENCE. THE CITY COUNCIL OF THE CITY OF ATASCADERO, CALIFORNIA DOES HEREBY FIND AND ORDAIN AS FOLLOWS: Section 1. Chapters 1 through 11 of Title 8 inclusive, are hereby repealed in their entirety. Section 2. Chapter 12, and all references thereof, is hereby readopted as Chapter 3 of this Title. Section 3. Title 8 of the Municipal Code is hereby amended as shown on exhibit 1 attached hereto and made a part Section 4 Pursuant to Section 17958.7 of the California Health and Safety Code, the City Council of the City of Atascadero, does hereby find that the local amendments as hereby proposed are necessary due to local climatic, geological or topographical conditions, as expressed below A. Changes to the plumbing code, as proposed, are necessary due to the variety of local soils conditions that vary throughout the community and are necessary to conform to the requirements of the Regional Water Quality Control Board local regulations; the varied topography and environmental conditions, such as the location of streams, creeks and other water courses, native trees, and other unique local physical conditions for which the amendments are designed to provide for design alternatives to mitigate impacts to such physical conditions. B. Changes to the fire code, as proposed, are necessary due to the varied topographical changes in the community that result in the location of high fire severity zones and varied response times for emergency vehicles. Section 5. The Building Official/Community Development Director is hereby directed to file a copy of this ordinance with the California Building Standards Commission of the State of California, pursuant to applicable State law. Section 6. This ordinance is enacted pursuant to and in compliance with Health and Safety Code Section 18941.5 and is expressly permitted in Government Code Section 50022.2. For all codes the effective date of this Ordinance shall be July 1, 1999. City of Atascadero Ordinance No.360 Page 2 Section 7. The enactment of this Ordinance and implementation of the regulations contained herein is found to be exempt from the California Environmental Quality Act pursuant to Section 21080(b)(15) pertaining to the implantation of state rules and regulations for the adoption of uniform building codes. Section 8. The Mayor is authorized to execute this Ordinance on behalf of the City and the City Clerk shall certify to the passage of this ordinance and shall cause the same to be published as required by law. PASSED AND ADOPTED this 28�h day of September, 1999 by the following roll call vote: AYES: Council Members Arrambide, Clay, Luna and Mayor Johnson NOES: None ABSENT: None ADOPTED: September 28, 1999 ay Jo so Mayor ATTEST: Marcia McClure Torgerson, City C66k APPROVED AS TO FORM: 4ro 9'1'1 !k _ f Roy f anley, Cit Attorne City of Atascadero Ordinance No.360 Page 3 Title 8 Building & Construction Regulations Chapter 1 Adoption of Model Codes 1.01 Model Codes—Adopted. The Atascadero Building Code includes all provisions within this title and those certain model codes listed below which codes were promulgated within the California Building Standards Code, known as the California Code of Regulations, Title-24, published by the International Conference of Building Officials, and the California Building Standards Commission the purpose and subject matter of which among other things is to protect the public health and safety. Further these codes listed below are adopted by reference with the same force and effect as if fully set forth in this code with the modifications as set forth in this Title 1998 California Building Code, Volumes I, II, and III 1998 California Fire Code 1998 California Electrical Code 1998 California Plumbing Code 1998 California Mechanical Code 1998 California Energy Code 1997 Uniform Administrative Code 1997 Uniform Code for the Abatement of Dangerous Buildings 1997 Uniform Housing Code Chapter 2 Amendments to Model Codes 2.01 Local Amendments -Adopted Pursuant to Section 17958.5 of the California Health and Safety Code, the modifications of the model codes are enacted due to local climatic, geological and/or topographical conditions, as contained in the enabling ordinance. 2.02 California Building Code- Amendments The California Building Code, as adopted by Section 1.01 is amended as follows: A. Roofing Materials. The following is added to Section 1503: City of Atascadero Ordinance No.360 Page 4 Roof covering for all new residential buildings and for any re-roofing of existing residential buildings shall be no less than Class "A" rating, regardless of building type or occupancy. Any reference to the approved use of roofing materials in residential buildings with less than Class "A" rating is hereby deleted. Exception: roof coverings on additions to existing wood shingle roofs amounting to no greater than twenty-five percent (25%) of the existing roof area may be Class "B" rating. B. Fire Sprinkler Systems. The following is added to Section 904.2.1: 904.2.1.1 In all new buildings having a total floor area (outside walls) of 5,000 square feet of gross area or more. 904.2.1.2 In all existing buildings of less than 5,000 square feet which undergo addition sufficient to make the total floor area greater than 5,000 square feet. 904.2.1.3 In all existing buildings or structures with a total gross (outside wall) floor area exceeding 5,000 square feet which undergo any addition or change in use. In regards to building additions, and for the purpose of this section, the total floor area shall be computed without regards to area separation walls and floors of less than 4-hour fire resistive construction as defined in the Uniform Building Code. For the purpose of this section, the provision of utilizing an area separation wall may only be allowed once in a particular building or structure. The area separation wall shall have no openings. 2.03 California Plumbing Code—Amendments. The California Plumbing Code, as adopted by Section 1.01, is amended as follows: A. Building Sewers. The following requirements shall apply to building sewers and related drainage piping. I. All building sewers shall be constructed with pipe of internal diameter not less than four (4) inches,unless a pipe of internal diameter not less than three (3) inches is approved by the Administrative Authority. 2. A cleanout shall be placed in every building sewer within five (5) feet of each building, at all changes in alignment or grade in excess of forty-five (45) degrees, within five (5) feet of the junction with the public sewer, and at intervals not to exceed one hundred (100) feet in straight runs. The cleanout shall be made by inserting a "Y" fitting in the line and fitting the cleanout in the "Y" branch in an approved manner. In the case of a cleanout near the junction of City of Atascadero Ordinance No.360 Page 5 the public sewer, the "Y" branch riser shall be extended to a depth of not more than one (1) foot. All other cleanouts shall be extended to finish grade. 3. Drainage piping serving fixtures located at an elevation of less than one foot above the nearest upstream manhole cover in the main sewer serving said fixtures shall drain by gravity into the main sewer, and shall be protected from backflow of sewage by installing an approved backwater valve. Each such backwater valve shall be installed only in that branch or section of the drainage system which receives the discharge from fixtures located less than one foot above the nearest upstream manhole cover. B. Private Sewage Disposal Systems. The design, installation operation and maintenance of private sewage disposal systems shall be in conformance with Appendix I of the Uniform Plumbing code and with standards specified in this Section. Where specific standards are not provided within this Section or where the Administrative Authority determines that higher requirements are necessary to maintain a safe and sanitary condition, the "Water Quality Control Plan, Central Coast Basin" (Adopted by the Regional Water Quality Control Board of the Central Coast Region)or other recognized industry standards may be used as a Guideline by the Administrative Authority. 1. Percolation Test. An on-site investigation shall be made by a registered engineer competent in sanitary engineering in order to determine the suitability of a particular site for a private sewage disposal system and to provide the data necessary to design a private sewage disposal system. A percolation test shall be required prior to issuance of a permit for all new or enlarged private sewage disposal systems. The following percolation test procedure shall be used in performing percolation tests, except that other accepted test procedures may be used when approved by the Administrative Authority. a) Number and Locaiton of Test Holes. A minimum of three separate test holes s[ace uniformly through and located in the immediate vicinity of the proposed leach field site are to be made. b) Type of Test Holes. The test hole shall have horizontal dimensions between 4 and 12 inches and vertical sides to the depth of the absorption trench. C) Preparation of Test Holes. Smeared soil surfaces shall be removed from the sides and bottom of the test hole to provide a natural soil interface. All loose material shall be removed from the test hole. Two inches of coarse sand or fine gravel shall be added to the test hole to protect the bottom from scouring and sediment. d) Soil Saturation and Swelling. The test hole is to be carefully filled to a depth of one foot above the gravel or sand with clear water which is to be City of Atascadero Ordinance No.360 Page 6 kept in the hole for at least four hours but preferably overnight. This step may be omitted in sandy soils containing little or no clay. e) Measurement of Percolation Rate. The percolation rate shall be determined twenty-four hours after water is first added to the test holes; except, in sandy soils containing little or no clay, the percolation rate shall be determined after the water from one filling of the test hole has completely seeped away. (i) If water remains in the test hole after the overnight swelling period, adjust the depth to approximately six inches over the gravel or sand and, from a fixed referenced point, measure the drop in water level over a thirty minute period to calculate the percolation rate. (ii) If no water remains in the test hole after the overnight swelling period, add clear water to bring the depth of water in the test hole to approximately six inches over the gravel or sand. From a fixed reference point, measure the drop in water level at approximately thirty minute intervals over four hours refilling six inches over the gravel or sand as necessary. The drop that occurs during the final thirty minute period is used to calculate the percolation rate. The drops during prior periods provide information for possible modification of the test procedure to suit local conditions. (iii) In sandy soils (or in other soils in which the first six inches of water seeps away in less than thirty minutes after the overnight swelling period), the time interval between measurements shall be taken as ten minutes and the test shall run for one hour with the drop during the final ten minutes being used to calculate the percolation rate. f) Deep Boring. A soil boring, to a minimum depth often (10) feet below the bottom of the absorption trench or pit, shall be made in order to determine the presence of impermeable bedrock and/or ground water. 2. General Design Standards. The following standards shall be used in the design of new or enlarged private sewage disposal systems where the percolation rate does not exceed 120 minutes per inch. a) Determination of Size of Absorption Area. The absorption area, measured in lineal feet of absorption trench, shall be calculated as set forth in this Section. Tables 4-1 (Absorption Area Requirements) and 4- 2 (Standard Trench Adjustment Factors), included in this Subsection, City of Atascadero Ordinance No.360 Page 7 shall be referred to as necessary. (Absorption Area per Bdrm)X(No. of Bdrms)XAdjustment Factor b) Location of Private Sewage Disposal Systems. The minimum distance between components of a private sewage disposal system and other site features shall be as set forth in Table 4-3 (Horizontal Distance Separation) and Table 4-4 (Vertical Distance Separation). Where physical limitations on a site preclude conformance with distance separation requirements, the Administrative Authority may approve a lesser separation when the design is prepared by a registered engineer competent in sanitary engineering and when adequate substantiating data is submitted with the design. The Administrative Authority shall not approve a separation less than that set forth in the "Water Quality Control Plan - Central Coast Region" unless the Regional Water Quality Control Board or its designated representatives have previously approved the design. 3. Additional Standards a) Existing legal building sites which are served by an individual on-site well may be approved for a private sewage disposal system only if the site meets lot size standards for private sewage disposal systems. b) Private sewage disposal systems proposed to be installed on slopes of 20% or more shall be designed by and have their installation inspected and certified by a registered civil engineer. The design shall minimize grading disruption associated with access for installation and maintenance. Such systems shall be prohibited on slopes of 30% or more, unless approved by both the Administrative Authority and the Regional Water Quality Control Board. C) When the percolation rates is more then 30 minutes/inch, a private sewage disposal system shall be designed, inspected, and certified to work by a registered civil engineer. d) When the percolation rates exceeds 120 minutes/inch, a private sewage disposal system, using solely dependent upon soil absorption, shall not be allowed. e) The design of private sewage disposal systems shall incorporate an approved filtering device to remove solids from effluent at the outlet of septic tanks. f) When the percolation rate exceeds 30 minutes/inch, a private sewage disposal system using a seepage pit shall not be allowed. City of Atascadero Ordinance No.360 Page 8 g) Expansion area shall be provided on all building sites, shall be identified on all plans submitted for private sewage disposal systems, and shall remain available for system expansion. If areas reserved for system expansion are not accessible for future installation, then the expansion area shall be installed with the original system. h) Inspection risers with four inches minimum diameter shall be installed at the ends of each absorption trench or bed. i) Septic tank manholes more than 24 inches below grade, valves, distribution boxes, and pumps shall be permanently accessible to the surface in a manner acceptable to the Building Official. 4. Special Design Standards. The following standards shall be used in the design of new or enlarged private sewage disposal systems where the percolation rate exceeds 60 minutes per inch. Designs for alternate types of private sewage disposal systems shall be by a registered civil engineer and may be approved by the Administrative Authority when the design engineer submits adequate substantiating data with the design. a) Determine of Size of disposal Field. The size of the disposal field shall be determined by the design engineer using methods of accepted engineering practice including manuals and documents specified in this Chapter or as otherwise approved by the Administrative Authority. b) Location of Private Sewage Disposal System. The minimum distance between components of a private sewage disposal system and other site features shall be as set forth in Table 4-3 (Horizontal Distance Separation) and Table 4-4 (Vertical Distance Separation) using the column entitled "Leach Field or Seepage Bed." C) When private sewage disposal systems are designed pursuant to this Section,the design engineer shall provide the owner with information on the location, design operation and maintenance of the private sewage disposal system. d) Existing legal building sites which are served by an individual on-site well may be approved for a private sewage disposal system only if the site is one acre or larger in size and meets other regulations and requirements regarding distance separation. e) Expansion area shall be provided on all building sites. 5. Replacement of Existing Private Sewage Disposal System. Where an existing private sewage disposal system has failed, the replacement system shall be City of Atascadero Ordinance No.360 Page 9 designed in conformance with this Chapter and shall be designed, inspected and certified to work by a registered civil engineer. In the event that the replacement system cannot be designed to conform with this Chapter, the Administrative Authority may approve a system designed to lesser standards when it is designed, inspected and certified to work by a registered civil engineer. a) A private sewage disposal system shall not be replaced by another system if sewers are available. b) The Administrative Authority shall not approve a replacement system which does not conform with prohibitions set forth in the "Water Quality Control Plan - Central Coast Basin", unless the Regional Water Quality Control Board or its designed representative has previously approved the design. The Administrative Authority may authorize a temporary means of sewage disposal pending such approval. City of Atascadero Ordinance No.360 Page 10 TABLE 4-1. Absorption Area Requirements Percolation Rate Absorption Area Per Bedroom (Minutes/Inch) (Square Feet) 0-00, 1.50 E 10 165 E , 16-20 215 230 26-30 250 ..... 2 7 x, 36-40- 28)y5 xlx,MSlE E '...:.. ... ,.u.... ,::.. -. 46-50 315 51"60:.: e, u, •£3301 a... - 61-70 380 EE 1 4301 „EEE.,.• =�„1.. 81-90.. 520 '660 101-110 830 111 .1" X50 "�.,:. �x(t� TABLE 4-2. STANDARD TRENCH ADJUSTMENT FACTOR Depth of Gravel Trench Width (in inches) Below Pipes (in Inches) 12 18 24 30 36 42 48 54 60 12 5 81 82 083 ##E 8 8 � 151 E 18 60 64 .66 .69 .71 .73 .75 .77 .78 -60 64 30 .43 .47 .50 .53 .55 .58 .60 .62 .64 36 37, .41 44'. ::x. -7 .50 S Fx 4 42 .33 .37 .40 .43 .45 .48 .50 .52 .54 4� 3010, 36 0?_ «� Note 1.For trenches not shown in Table 4-2, the standard trench adjustment factor may be computed as follows: (Where W=width of trench (in feet) D=depth of gravel below pipe (in feet) W + 2 W + 1 + 2D City of Atascadero Ordinance No.360 Page 11 TABLE 4-3. HORIZONTAL DISTANCE SEPARATION (IN FEET) Building Septic Leach Seepage Sewer Tank Field or Pit Seepage Bed Buildings or structures, including porches,steps,breezeways,patios,and 2 5 8(1) 8(1) carports whether covered or not Property Line Clear(2) 5 5 10 Water supply well 50(3) 50 100 150 Streams,when shown? '/2 minute USGS Map and when a defined channel 50 50 100 100 with definite bed and banks exists Swales,ephemeral draws or other natural watercourses with drainage 50 50 50 50 areas larger than 10 acres Trees 10(*) * 10(*) Seepage Pits -- 5 5 12 Leach Field or Seepage Bed -- 5 6 5 On-site Domestic water service line 1(4) 5 5 5 Distribution Box -- -- 5 5 Pressure Public Water Main 10(5) 10 10 10 Sloping ground,cuts, or other embankments -- -- 15(6) 15(6) Reservoirs,including ponds, lakes,tanks,basins,etc. for storage, 200 200 2000 200(') regulation and control of water recreation,power,flood control or linking Springs 100 100 100 100 Notes: (1) Distance separation shall be increased to twenty(20)feet when building or structure is located on a downward slope below a leach field,seepage bed or seepage pit. (2) See Section 315 (c)of Uniform Plumbing Code. (3) Distance separation may be reduced to twenty-five(25)feet when the drainage piping is constructed of materials approved for use within a building. (4) See Section 1108 of Uniform Plumbing Code. (5) For parallel construction or crossings,approval by the Health Department shall be required. (6) Distance is measured as horizontal distance to daylight. This distance may be reduced where it is demonstrated that favorable geologic conditions and soil permeability exist based on a report and analysis prepared by a licensed geologist or soils engineer. (7) Distance is measured at spillway elevation. (*) See tree protection guidelines. City of Atascadero Ordinance No.360 Page 12 TABLE 4-4 VERTICAL DISTANCE SEPARATION (IN FEET) Leach Field or Seepage Seepage Bed Pit Ground water 5 5 Bedrock 10 4 Note: Distance is measured from bottom of trench or pit. 2.04 California Fire Code—Amendments. The California Fire Code, as adopted by Section 1.01, is amended as follows: A. The limits referred to in Sections 7902.2.2.1 and 7904.2.5.4.2 of the Fire Code in which the storage of flammable or combustible liquids in outside aboveground tanks is prohibited is established as the city limits of the City of Atascadero. B. The limits referred to in Section 7701.7.2 of the Fire Code in which the storage of explosives and blasting agents is prohibited is established as the city limits of the City of Atascadero. C. The turning radius as referred to in Section 902.2.2.3 is defined as 28 feet inside radius and 48 feet outside radius, or as otherwise approved. D. Section 902.2.2.6 is amended to read as follows: The gradient for a fire apparatus access road shall not exceed twenty percent(20%) at any point along its length. E. Alarm Signals, as defined in Section 202, shall not conflict with the response of emergency vehicles or civil defense systems and shall be approved by the Police Chief and Fire Chief prior to installation. F. Section 1003.2.1 is amended to read as follows: An automatic fire-extinguishing system shall be installed in the occupancies and locations as set forth in Section 1003.2. In addition to those locations as set forth in Section 1003.2, automatic fire-extinguishing systems shall also be installed within the City of Atascadero: 1. In all new buildings having a total floor are (outside walls) of 5,000 square feet of gross area or more. 2. In all existing buildings of less than 5,000 square feet which undergo addition sufficient to make the total floor area greater than 5,000 square feet. In regards City of Atascadero Ordinance No.360 Page 13 to building additions, and for the purpose of this section, the total floor area shall be computed without regards to area separation walls and floors of less than 4-hour fire resistive construction as defined in the Uniform Building Code. For the purpose of this section, the provision of utilizing an area separation wall may only be allowed once in a particular building or structure. The area separation wall shall have no openings. 3. In all existing buildings or structures with a total gross (outside wall) floor area exceeding 5,000 square feet which undergo any addition or change in use. 4. In all residential occupancies within the area defined by the Fire Chief and Community Development Director that is located within the designated "high fire severity zone" and has an eight (8) minute or longer response time as indicated on the "Mandatory Automatic Fire-Extinguishing Area Map" on file in the Community Development Department. The Fire Chief and Community Development Director shall annually update such map.