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Attachment 1 Exhibit B <br /> Exception: Refrigeration systems. <br /> 20.24.440 CFC Section 6004.1.16 added—Seismic shutoff valve. <br /> Section 6004.1.16 is added to read: <br /> 6004.1.16 Seismic shutoff valve. An automatic seismic shut-off valve,which is of a fail-safe to close <br /> design, shall be provided to shutoff the supply of highly toxic,toxic and moderately toxic gases with <br /> an LC50 less than 3,000 parts per million upon a seismic event within 5 seconds of a horizontal <br /> sinusoidal oscillation having a peak acceleration of 0.3G (1.47m/sec2)and a period of 0.4 seconds. <br /> 20.24.450 CFC Section 6004.1.17 added—Fittings and connections. <br /> Section 6004.1.17 is added to read: <br /> 6004.1.17 Fittings and connections. Fittings and connections shall be located in a gas cabinet, <br /> exhausted enclosure,gas room or exhausted valve manifold box. <br /> Exception: Welded connections. <br /> 20.24.460 CFC Section 6004.2 amended—Indoor storage and use. <br /> Section 6004.2 is hereby amended to read: <br /> 6004.2 Indoor storage and use amended. The indoor storage or use of highly toxic,toxic and <br /> moderately toxic compressed gases shall be in accordance with Sections 6004.2.1 through <br /> 6004.2.2.10.4. <br /> 20.24.470 CFC Section 6004.2.1 amended—Applicability. <br /> Section 6004.2.1 is hereby amended to read: <br /> 6004.2.1 Applicability. The applicability of regulations governing the indoor storage and use of <br /> highly toxic,toxic and moderately toxic compressed gases shall be in accordance with Sections <br /> 6004.2.1.1 through 6004.2.1.5. <br /> 20.24.480 CFC Section 6004.2.1.1 amended—Quantities not exceeding the maximum allowable <br /> quantity per control area. <br /> Section 6004.2.1.1 is hereby amended to read: <br /> 6004.2.1.1 Quantities not exceeding the maximum allowable quantity per control area.The <br /> indoor storage or use of highly toxic and toxic compressed gases in amounts not exceeding the <br /> maximum allowable quantity per control area set forth in Table 5003.1.1(2) shall be in accordance <br /> with Sections 5001, 5003, 6001, 6004.1. 6004.2.1.4 and 6004.2.1.5. <br /> 20.24.490 CFC Section 6004.2.1.4 added—Quantities not exceeding minimum threshold quantity <br /> per control area. <br /> Section 6004.2.1.4 is added to read: <br /> Page 37 of 64 <br />