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Building & Fire Safety

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Fire Safety Engineering

Hazardous Materials (HM)

Hazardous chemicals that pose an unreasonable risk to the health and safety of operating or emergency personnel, the public and the environment if not properly controlled during handling, storage, manufacture, processing, packaging, use, disposal or transportation are regulated by the fire code. Hazardous materials are classified according to 'fire code' hazard categories. The properties of the chemical are used to determine the hazard categories that the chemical is listed under. In the fire code material categories are classified as physical and health hazards. Examples of physical categories include: explosives and blasting agents; combustible liquids; flammable solids, liquids and gases; organic peroxide solids or liquids; oxidizer, solid or liquids; oxidizing gases; pyrophoric solids, liquids or gases; unstable (reactive) solids, liquids, or gases; water-reactive materials solids or liquids; cryogenic fluids. Examples of health categories include: highly toxic and toxic materials; corrosive materials. This page has content designed to assist businesses in categorizing, classifying, documenting, and planning for the storage and use of Hazardous Materials (HM). If any of the terminology used above is unfamiliar the service of a competent registered design professional (Professional Engineer) should be retained to prepare the required documentation.

Resources

Community Development Department, Hazardous Material Storage Requirements
CHAPTER 19.7: DEVELOPMENT AND DESIGN STANDARDS
19.7.8.D HAZARDOUS MATERIALS STORAGE
D. HAZARDOUS MATERIALS STORAGE
1. General
(a) The land use impacts for facilities that use hazardous materials in excess of the exempt amounts or maximum allowable quantities per control area as specified in the Fire Code are declared to be potentially harmful to the public health, safety, and welfare, or potentially damaging to the property values of adjacent properties.
(b) A conditional use permit is required for the storage, handling, or use of hazardous materials when the quantity is in excess of the exempt amount or maximum allowable per control area, as specified in the Fire Code. Requirements and allowed amounts for fuel storage are specified below. Legal nonconforming uses located within the City of Henderson shall not be expanded unless a conditional use permit has been issued.
(c) Notwithstanding the above regulations regarding hazardous materials storage, any substance designated as highly hazardous as listed in NRS 459.3816 and stored in the quantity specified shall require City Council use permit approval in accordance with the public notice requirements and processing procedures set forth in NRS 278.147.
2. Fuel Storage
Above-ground fuel storage of greater than 250 gallons on any site requires approval by conditional use permit. Above-ground storage of 250 gallons or less of propane, diesel, gasoline, and similar liquid or gas fuels is allowed subject to the issuance of the appropriate installation permit as required by the Fire Code, provided that, unless otherwise approved through design review, no above-ground storage shall be permitted in a front or unenclosed corner side yard; and storage containers, pumps, and other associated equipment shall be considered mechanical equipment for the purposes of screening under Section 19.7.5.H. The 250-gallon (or equivalent dry unit of measurement) limit applies to the size of the tank or container where a single unit is proposed, and where multiple units are proposed, the 250-gallon limit applies to the total aggregate above-ground storage capacity on the site.
3. Additional Reports
For any hazardous materials storage and fuel storage that requires a conditional use permit, the applicant may be required to submit additional reports to the Fire Chief and/or Director of Building and Fire Safety prior to being scheduled for a Planning Commission hearing. Reports may include, but are not limited to, those listed in Chapter 459 of the Nevada Administrative Code. Those reports shall be prepared and reviewed at the applicantís expense. The costs of any consultantís services required to review reports that exceed the Cityís technical expertise shall be paid by the applicant.

Hazardous Materials Inventory Statement (HMIS). Where required by the fire code official, an application for a permit shall include an HMIS, such as Superfund Amendments and Reauthorization Act of 1986 (SARA) Title III, Tier II Report or other approved statement. The HMIS shall include the following information:

1. Product Name.
2. Component.
3. Chemical Abstract Service (CAS) number.
4. Location where stored or used.
5. Container size.
6. Hazard Classification.
7. Amount in Storage.
8. Amount in use-closed system.
9. Amount in use-open system.
10. Aggregate quantities per control area.
11. Site plan/Floor plan with designated control areas and details of 704 placard for facility and for each control area.
12. Sprinkler design criteria, if sprinklered.
13. Cabinets or exhausted enclosures.
14. NFPA 704 hazard numbers.

Hazardous Materials Management Plan (HMMP). Where required by the fire code official or when the Maximum Allowable Quantity per control area is exceeded, an application for a permit shall include a HMMP. The HMMP shall include a facility site plan designating the following:

1. Access to each storage and use area.
2. Location of emergency equipment.
3. Location of where liaison will meet emergency responders.
4. Facility evacuation meeting point locations.
5. The general purpose of other areas within the building.
6. Location of all above-ground and underground tanks and their appurtenances including, but not limited to, sumps, vaults, below-grade treatment systems and piping.
7. The hazard classes in each area.
8. Locations of all control areas and Group H occupancies.
9. Emergency exits.