Chapter 32 - Urban Industrial Zone • Support structures for any permitted or approved buildings, signs, fences and works. 32.1.4 Hazardous Facilities (District Function) 32.1.4.1 Effects Ratio Any activity having an ‘effects ratio’ no greater than 1.0 shall be a Permitted Activity. The ‘effects ratio’ shall be calculated in accordance with the Hazardous Facilities Screening Procedure set out in Appendix C. 32.1.4.2 Site Design 32.1.4.2.1 Any part of the site where liquid or solid hazardous or environmentally damaging substances are stored or used shall be effectively sealed with materials which are resistant to the substance(s). 32.1.4.2.2 Any part of the site where liquid or solid hazardous or environmentally damaging substances are stored or used shall be sealed and bunded so that the equivalent of the maximum of the largest container within the bunded area could be contained and excluded from the stormwater system if a spill occurs. In areas where drums are stored, the bunded area shall be able to contain half of the maximum amount of the material stored. 32.1.4.2.3 Any bunds shall be constructed from materials which are resistant to the substance that the bund is designed to contain, so as to prevent the substance entering the soil. 32.1.4.2.4 All stormwater grates shall be clearly marked. 32.1.4.2.5 Storage of petroleum products in underground tanks shall comply with the most recent version of the Code of Practice for Design, Installation and Operation of Underground Petroleum Storage Systems. 32.1.4.2.6 Any part of the site where solid or liquid hazardous or environmentally damaging substances are loaded or unloaded shall be sealed, bunded, and drained to the satisfaction of the Council. 32.1.4.2.7 All vehicle accessways onto that part of a hazardous facility site where hazardous and environmentally damaging substances are loaded or unloaded shall have cut off drains installed which are not directly connected to the stormwater system. 32.1.4.2.8 Any part of the site where vehicles, equipment or containers that have or may have become contaminated with hazardous or environmentally damaging substances are washed, shall be sealed, bunded and drained so that process effluent (run-off) from the washdown area is discharged into the foulwater system, or collected and stored in tanks for removal by a suitable trade waste contractor. 32.1.4.2.9 A record will be kept of the quantities of hazardous wastes stored on-site, or taken away for disposal. 32 - 7