Loading...
HomeMy WebLinkAboutPreliminary Building Code Review for Well 5A Facilities.pdfWell 5A Treatment Facilities Kennedy/Jenks Consultants City of Renton, Washington PRELIMINARY BUILDING CODE REVIEW WELL 5A TREATMENT FACILITIES Section 1 - Summary 1.01 - Description The Project involves an existing Well (City of Renton Well 5A), new Treatment Facility and new Water Basin. The Project is divided into three basic components: • Water Basin: Below grade, under the new Treatment Building. Separate basins contain treated water (Chlorine Contact Basin) and the backwash water (Backwash Settling Basin). These basins are not habitable space. • Treatment Building: Single-story, 5,800 SF enclosed structure. • Existing Well 5A: The existing building around the well will be demolished and the well incorporated into the new Treatment Building. The following review is a general assessment of the Building Code, and Fire and Life Safety issues as they relate to the design and location on the site of the Treatment Building. Refer to Part 3-Code Summary Table for specific code references. 1.02 - Codes Used for the Review Note: This Preliminary Code Review is developed on the 2006 IBC without Washington Amendments. This review is formatted assuming the Washington Amendments will be incorporated. The Washington Amendments are scheduled to be published in July 2007. This review will be updated after amendments are available. • International Building Code (IBC), 2006 with the State of Washington 2007 Amendments • International Fire Code (IFC), 2006 with the State of Washington 2007 Amendments • International Plumbing Code (IPC), 2006 with the State of Washington 2007 Amendments • International Mechanical Code (IMC), 2006 with the State of Washington 2007 Amendments • National Electrical Code (NEC), 2005 • State of Washington Energy Code, 2007 1.03 - Code and Zoning Requirement issues • The State of Washington Amendments to the IBC is used for all building design requirements (including referenced IFC sections), and supersedes National Fire Protection Association (NFPA) requirements in all areas. As a general rule, the NFPA requirements are used for electrical design and for items that are not addressed in the IBC. Preliminary: 12 April 2007 K/J Project: 0697005.01 By: D.Wright Page 1 of 10 Well 5A Treatment Facilities Kennedy/Jenks Consultants City of Renton, Washington • The National Electrical Code is enforced by the City of Renton within the City limits. • A review of the Local Zoning Ordinance(s) is not included in this review. Local Ordinance(s) such as Use, Setback, Lot Coverage, and Off-Street Parking requirements would (VERIFY) not affect the design of the Facility. 1,04 - Code Officials • Planning & Permitting: City of Renton • Fire Department Plans Review: Corey Thomas, 425-430-7024 ■\.05 - Synopsis of Code Analysis The synopsis below lists the conclusions based on the discussions in Sections 3 and 4. The code discussion, references and additional requirements are listed in the Section 3: Life-Safetv Analvsis and Section 4: Code Summarv Table- New Water Basin (below grade tank under the Treatment Building): Note the Basin is not addressed in the remainder of the review since it is not a building. Construction: Type ll-B (per IBC) Occupancy: Space is not inhabitable and is covered by WISHA requirements. Actual Total Area: Approximately 4,450 square feet The underground basins are considered confined spaces Treatment Building Construction: Type ll-B Occupancy: Mixed occupancy F-1, H-3, and H-4 Actual Total Area: Approximately 5,800 square feet Allowable area: 14,000 base SF based on H-3 occupancy. Actual allowable is greater Exterior walls: Non-rated, more than 20 feet to property line Interior walls: Non-combustible construction Occupancy separations: 1. One hour between H-3 and F-1 2. One hour between H-4 and F-1 Calculated Occupant load: 20 Exits required: 1. Two (2) for the Treatment building, 200 feet maximum travel distance to exit. Preliminary: 12 April 2007 K/J Project: 0697005.01 By: D.Wright Page2of 10 Well 5A Treatment Facilities Kennedy/Jenks Consultants City of Renton, Washington 2. Two (2) from H-3 and H-4 occupancies that exceed 25 feet travel distance to exit access (doors serving the room). Exits shall have panic hardware • Containment Spill control: Required for rooms with hazardous chemicals • Insulation: Required in heated and cooled areas • Sprinklers: Required • Stand-by Power: Required • Fire Alarm: Required • Smoke Detection System: Required by Fire Marshal • Hydrant Fire flow Requirement: 1,500 gpm and a maximum of 250 feet from building • Setbacks - See paragraph 3.06 Section 2 - Storage Quantities and General Storage Requirements n 2.01 - Chemical Storage The following chemicals are stored in or adjacent to the Treatment Building. Storage consists of hazardous chemicals and non-^hazardous materials. 1. Sodium Hypochlorite (base): 12%-15% solution, 1,000 gallons maximum stored in a single tank; CAS No. 7681-52-9 (NFPA/IFC Health Rating: H3, COR) Classified per IFC as meeting Corrosive category. The chemical stored exceeds the exempt amount (500 gallons) per IBC Table 307.1(2) and as such is considered a significant health hazard. 2. Sodium Fluoride (Crystalline): Toxic. 2,000 to 4,000 pounds (maximum) stored on pallets; CAS No. 7681-49-4 (NFPA/IFC Health Rating: H3, Toxic) Classified per IFC as meeting Toxic category. The chemical stored exceeds the exempt amount per IBC Table 307.1(2) and as such is considered a significant health hazard. 3. Polyphosphate (weak acid): 110 gallons stored in 55 gallon drums. No CAS designation. Storage and handling will comply with manufacturer's MSDS recommendations. 4. Granulated Activated Carbon (GAC, solid): 80,000 pounds total stored in 4 enclosed tanks, constantly kept wet. CAS No. 7440-44-0. (NFPA/IFC Flammability Rating: F3) Classified per IFC as meeting flammable solid category. The chemical stored is greater than the exempt amount (125 pounds inside or 500 pounds outside) per IBC Table 307.1(1) or IFC Table 2703.1.1(3). The GAC in the treatment vessels is normally not considered highly combustible if it is kept wet. The maximum exempt amount of dry material that can be stored inside is 125 pounds. A canopy may be erected over the storage area to reduce the management of rain water inflow into the storm system. Contact with strong oxidize such as ozone, liquid oxygen, chlorine, permanganate, etc., may result in fire. Preliminary: 12 April 2007 K/J Project: 0697005.01 By: D.Wright Page 3 of 10 Well 5A Treatment Facilities Kennedy/Jenks Consultants City of Renton, Washington 2.02 - Stand-by Generator Fuel Storage The back-up mobile generator stores fuel in an integral double contained belly tank. The designation of the storage is as follows: 1. Diesel Fuel: 700 gallons stored in a single tank; CAS No. 000126-00-0. (NFPA/IFC Health and Flammability Ratings: H2, F2) Classified per IFC as a Combustible Liquid (Class 2) category. The chemical stored is greater than the exempt amount (120 gallons) per IBC Table 307.1 2.03 - Chemical Separation Generator Room: The Generator is in a separate room remote from the other chemical storage areas. Secondary containment and spill control is required. 2.04 - Spill Control and Containment Required for sodium hypochlorite and diesel tank. Containment for hypochlorite will be in a sealed concrete capture area around the tank below floor level, and the diesel tank would be a double- shelled tank. 2.05 - Liquid Level Limit Controls Tanks containing hazardous liquids in excess of 500 gallons shall be equipped with a liquid level limit control to prevent tank overfilling (IFC 2704.8). 2.06 - Emergency Alarm Required per IFC 2704.9. Section 3 - Life-Safety Analysis . 3.0^ -Facility Area Summary The 5,800 Square foot Treatment Building includes the following spaces: 1. Outdoor Filters: 1,270, F-1 Occupancy 2. Control/Toilet Rooms: 375 SF, F-1 Occupancy 3. Well/Air Scour Blower Room: 590 SF, F-1 Occupancy 4. Backwash Pumps: 170 SF, F-1 Occupancy 5. Mechanical Room: 180 SF, F-1 Occupancy 6. Electrical Room: 350 SF, F-1 Occupancy 7. Future 02 Eductor: 200 SF, F-1 Occupancy 8. Generator Room: 800 SF, H-3 Occupancy 9. Pipe Gallery/Chemical Storage Room: 1,430 SF, H-4 Occupancy Preliminary: 12 April 2007 K/J Project: 0697005.01 By: D.Wright Page4of 10 Well 5A Treatment Facilities Kennedy/Jenks Consultants City of Renton, Washington 3.02 - Occupancy Group and Occupant Load Treatment Building • F-1 Occupancy is a moderate-hazard industrial occupancy jncluding Combustible, Corrosive, and Toxic materials in quantities exempt from an H Occupancy classification. • H-3 Occupancy is an occupancy including physical hazards including Combustible materials. • H-4 Occupancy is an occupancy including health hazards such as Corrosive, and Toxic materials. • The calculated occupant load for the Treatment Building is 20. Actual occupant load will be lower. 3.03 - Physical and Health Hazards • Diesel fuel. Sodium Hypochlorite and Sodium Fluoride are hazardous materials as indicated in Section 2 of this review. 3.04 - Spill Control and Secondary Containment • Per the IFC, Spill Control is provided at all hazardous liquids stored in vessels having a capacity of more than 55 gallons or when the aggregate capacity of multiple vessels exceeds 1,000 gallons. • Any spills in the chemical loading area will drain back into the underground vaults. 3.05 - Construction Type The new Treatment Building meets the requirements of IBC Type ll-B construction. Type ll-B buildings can be constructed of any non-combustible materials approved by the IBC (concrete, masonry or steel). 3.06 - Fire Sprinklers Sprinklers are required due to the Hazardous Occupancies (H-3 and H-4) in the building. 3.07 - Construction Requirements based on location to Property Lines: Treatment Building The Treatment Building is F-1, H-3 and H-4 Occupancies and Type ll-B (non-rated) construction. Per IBC, walls must be one-hour protected if less than thirty feet from a property line, 2 hour if less than 10 feet and 3 hours if less than 5 feet to the property line. Openings in exterior walls (windows and doors) must be protected when less than 30 feet from a property line and openings are not permitted less than five feet. • East side (street frontage): The Treatment Building is located 80 feet from the property line along the street frontage. The Treatment Building is not located near any other buildings or property lines. Preliminary: 12 April 2007 K/J Project: 0697005.01 By: D.Wright Page 5 of 10 Well 5A Treatment Facilities Kennedy/Jenks Consultants City of Renton, Washington • North side: The Treatment Building is located approximately 30 feet from the property line. Recommend keeping a 30 foot clearance if possible • West side: The Treatment Buiiding is located approximately 70 feet from the property line. • South side: The Treatment Building is located approximately 30 feet from the property line. Recommend keeping a 30 foot clearance if possible 3.08 -Exits One exit door for each room is required based on occupant load. H occupancies will require 2 exits if travel distance exceeds 25 feet. The required exit doors are 36 inches wide by 80 inches high minimum, swinging type. No special hardware (panic devices) is required and the exit door need not swing out in the direction of egress. Hazardous occupancies may require panic hardware depending on final configuration. 3.09 - Safety Features • An emergency eyewash and shower is required per WISHA in areas with hazardous materials. • Exit illumination is required at one-foot candle (IBC 1006.1). Stand-by power is required. (IBC 1006.1). ZM - Ventilation Facility is ventilated both naturally and by mechanical means. Exhaust ventilations in H occupancies shall be 1 CFM/SF, and comply with IFC 2704.3 and IFC 705.1.9 3.11 - Noise The Facility will not contribute to existing noise levels. Community noise regulations are not part of this review. ZA2 - Buiiding insulation • The heating requirements for the Facility are greater than 8 BTUs per hour per square foot; the Facility is considered a heated space per section 1310 of the Washington State Energy Code and requires building insulation. • The Facility has a variety of insulation types as follows: 1. The roof uses R-30 insulation 2. The masonry wall has two inches of insulating concrete with a value of R-2. The total assembly meets State of Washington requirements. 3. The furred walls use R-11 insulation. Preliminary: 12 April 2007 K/J Project: 0697005.01 By: D.Wright Page6of 10 Well 5A Treatment Facilities Kennedy/Jenks Consultants City of Renton, Washington 3.13 - Electrical Electrical design shall comply with the NEC. The primary issue is that a minimum of 42-inch clearance in front of panels 3A4 - Handicap Access • The Facility is normally unoccupied. Operation and maintenance personnel enter only periodically to perform operation/maintenance tasks. • The Treatment Building is not required to meet accessibility requirements. The Washington Amendments to the IBC indicates that all facilities that are normally occupied must be accessible to the physically handicapped. Exceptions to this include areas such as equipment spaces, attics, crawl spaces, and similar spaces. The Treatment Building is considered an equipment space. 3.15' Special Design Considerations Mobile Stand-by Generator poses several design issues as follows: 1. Flue Exhaust: A flexible metal flue fitting will be required for exhaust gas. The exhaust gas will be ducted to the exterior. Power assist will be required if the exhaust run is over 10 feet. 2. Fuel Tank Vent: Flexible vent fitting and vent pipe wiii be required to vent the tank to the exterior. 3. Fire: Fire sprinklers are required in H-3 occupancies or fuel storage over 120 gallons. 4. Containment: The fuel tank will most likely be double contained. 20 minutes of fire sprinkler water will need to be contained or controlled (drain to a safe area outside or inside). This typicaily amounts to 1,000 to 1,500 gailons of water. 5. Building Construction: Fire walls are normally required between hazardous uses and other occupancies. This normally not a major cost issue, but windows and door openings will be limited. 6. Ventilation: Connection to the exhaust louver shroud will be the most cumbersome part of the operation. The cooling system on the generator will not function adequately without a duct to the exterior. 7. Egress: a minimum of two swinging doors with panic hardware may be required depending on the layout of the space. 8. Noise: Noise from operation of the generator will be difficult to mitigate. Roll-up and overhead doors are poor sound attenuators. Expect noise levels on the outside, adjacent to the roll- up/overhead door to be 75 to 80 dBA. 9. Electrical: No unusual electrical code issues associated with the operation. Clearances around panels will need to conform with the NFPA. Preliminary: 12 April 2007 K/J Project: 0697005.01 By: D.Wright Page 7 of 10 Well 5A Treatment Facilities City of Renton, Washington Kennedy/Jenks Consultants Section 4 - CODE SUMMARY TABLE: Treatment Building Item Description IBC unless noted otherwise Comments Actual Square Footage Square footage is Gross Square Feet Treatment Building 5,800 SF F-1, H-3 and H-4 Occupancies Construction Type Type ll-B IBC Table 601 Any non-combustible materials allowed by the IBC. Hazardous Materials Storage or Dispensing Sodium Hypochiorite 1,000 gal. in 2 tanks IBC Table 307.1(2) See Section 2 for discussion Sodium Fluoride 2,000 lbs IBC Table 307.1(2) See Section 2 for discussion Diesel Fuel 700 gal. in 1 tank IBC Table 307.1(1) See Section 2 for discussion Allowable Area 14,000 SF Table 503 Based on Type ll-B construction & H-3 Occupancy Construction Requirements Height 55 ft. max. 2 story Table 503 Exterior Wall Fire Rating -Setback Distance from Property Line 1-Hr<30FT, 2-Hr < 10FT, < 3-Hr < 5 FT Table 602 Based on Type ll-B construction & H-3 Occupancy Openings See Comment Per 704.7 & Table 704.8 Per calculation Preliminary: 12 April 2007 By: D. Wright K/J Project: 0697005.01 Page 8 of 10 Well 5A Treatment Facilities City of Renton, Washington Kennedy/Jenks Consultants Item Description IBC unless noted otherwise Comments Egress/Exiting Occupant Load 20 Table 1004.1.1 Actual load is 0 to 4 people, based on mechanical room occupancy Travel Distance to Exit Access H occupancies: 150 feet max. F-1 occupancy: 250 feet max Table 1016.1 Exits Required H occupancies: 1 where travel distance < 25 feet F occupancy: 1 where travel distance < 75 feet Table 1019.2 Synopsis of Table 1019.2. Layout may affect number of exits required Sprinklers Required IBC 903.2.4 Hydrant Fire Flow Requirement 1,500 gpm for two hours IFC Appendix B, Table B105.1 Spiii Controi Sodium Hypochlorite Required IFC 2704.2.1 & NFPA Refer to discussion in Section 2 in this review Diesel Fuel Secondary Containment Sodium Hypochlorite Required IFC 2704.2.2 Refer to discussion in Section 2 in this review Diesel Fuel Fire Water Containment Required IFC 2704.2.2.6 Handicap Access See Comment IBC Chapter 11 Subject to approval by Building Official. Work cannot reasonably be performed by the Handicapped Fire Aiarm Not Required IFC 907.2.5 Preliminary: 12 April 2007 By; D.Wright K/J Project: 0697005.01 Page 9 of 10 Well 5A Treatment Facilities City of Renton, Washington Kennedy/Jenks Consultants Item Description ISO unless noted otherwise Comments Smoke Alarm Required by Fire Department Signal to be sent to Water Dept. Headquarters Computer at the City Shops Emergency Alarm Required IBF 2704.9 Exit Signs Required IBC 1011.1 Illuminated per 1011.2 Ventilation in Spaces Required IBC 1202.2.1 Must provide mechanical ventilation or openable exterior windows/louvers equal to 1/20'*^ of total floor area. Attic Access Not applicabie VERIFY IBC 1209.2 No attic. Enciosed Spaces are constructed of Non-combustible materials and 20" high Attic Ventiiation Not applicable VERIFY IBC 1203.2. Access to Building Equipment in attic or truss space Not applicable VERIFY IBC 1209.3 Preliminary: 12 April 2007 By: D. Wright K/J Project: 0697005.01 Page 10 of 10