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10 <br /> (continued) <br /> TABLE 105.6.21—continued PERMIT AMOUNTS FOR HAZARDOUS <br /> MATERIALS <br /> TYPE OF MATERIALAMOUNT <br /> Water-reactive materials <br /> Liquids <br /> Class 3 Any Amount <br /> Class 2 5 gallons <br /> Class 1 55 gallons <br /> Solids <br /> Class 3 Any Amount <br /> Class 2 50 pounds <br /> Class 1 500 pounds <br /> For SI: 1 gallon = 3.785 L, 1 pound = 0.454 kg. <br /> a. 20 gallons where Table 5003.1.1(1) Note k applies and hazard identification signs <br /> in accordance with Section 5003.5 are provided for quantities of 20 gallons or less. <br /> b. 200 pounds where Table 5003.1.1(1) Note k applies and hazard identification signs <br /> in accordance with Section 5003.5 are provided for quantities of 200 pounds or less. <br /> 105.6.22 HPM Facilities (Optional Permit) <br /> An operational permit is required to store, handle or use hazardous production <br /> materials. <br /> 105.6.23 High-Piled Storage (Optional Permit) <br /> An operational permit is required to use a building or portion thereof as a high-pile <br /> storage area exceeding 500 square feet (46 m2). <br /> 105.6.24 Hot Work Operations (Optional Permit) <br /> An operational permit is required for hot work including: <br /> 1. Public exhibitions and demonstrations where hot work is conducted. <br /> 2. Use of portable hot work equipment inside a structure. <br /> Exception: Work that is conducted under a construction permit. <br /> 3. Fixed-site hot work equipment, such as welding booths. <br /> 4. Hot work conducted within a wildfire risk area. <br />