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Attachment 1 Exhibit B <br /> 6004.1.3 Exhausted enclosures.Exhausted enclosures containing highly toxic,toxic or moderately toxic <br /> gases shall comply with Section 5003.8.5 and the following requirements: <br /> [balance to remain the same] <br /> 20.24.320 CFC Sections 6004.1.4 added—Automatic shut-off valve. <br /> Section 6004.1.4 is added to read: <br /> 6004.1.4 Automatic shut-off valve.An automatic shut-off valve,which is of a fail-safe to close design, <br /> shall be provided to shut off the supply of highly toxic gases as close as possible to the supply container <br /> for any of the following: <br /> 1. Activation of a manual fire alarm system. <br /> 2. Activation of the gas detection system. <br /> 3. Failure of emergency power. <br /> 4. Failure of primary containment. <br /> 5. Seismic activity. <br /> 6. Failure of required ventilation. <br /> 7. Manual activation at an approved remote location. <br /> 20.24.330 CFC Section 6004.1.5 added—Annual Maintenance. <br /> Section 6004.1.5 is added to read: <br /> 6004.1.5 Annual Maintenance.All safety control systems at a facility shall be maintained in good <br /> working condition and tested not less frequently than annually. Maintenance and testing shall be <br /> performed by persons qualified to perform the maintenance and tests. Maintenance records and <br /> certifications shall be kept for a minimum of three years and shall be made available to any representative <br /> of the Livermore-Pleasanton Fire Department for inspection upon request. <br /> 20.24.340 CFC Section 6004.1.6 added—Maximum threshold quantity. <br /> Section 6004.1.6 is added to read: <br /> 6004.1.6 Maximum threshold quantity.Toxic gases stored or used in quantities exceeding the <br /> maximum threshold quantity in a single vessel per control area or outdoor control area or H-Occupancy <br /> shall comply with the additional requirements for highly toxic gases of Section 6004 of this code. <br /> Moderately toxic gases stored or used in quantities exceeding the maximum threshold quantity in a single <br /> vessel per control area or outdoor control area or H-Occupancy shall comply with the additional <br /> requirements for toxic gases of Section 6004 of this code. <br /> 20.24.350 CFC Section 6004.1.7 added—Reduced flow valve. <br /> Section 6004.1.7 is added to read: <br /> 6004.1.7 Reduced flow valve.All containers of materials other than lecture bottles containing highly <br /> toxic material and having a vapor pressure exceeding 29 psi shall be equipped with a reduced flow valve <br /> when available. If a reduced flow valve is not available,the container shall be used with a flow-limiting <br /> device.All flow limiting devices shall be part of the valve assembly and visible to the eye when possible; <br /> otherwise,they shall be installed as close as possible to the cylinder source. <br /> Exception: When the process use rate is approximately equal to the maximum flow rate of the <br /> cylinder/tank valve. <br /> Page 30 of 60 <br />