Subject: Hazardous Materials  

Revised April 2025 

Purpose: A hazardous material operational permit is required to store, transport on site, dispense, use or handle hazardous materials more than the amounts listed in Table 105.6.20 of the IFC 2018. Hazardous materials operational permits shall be renewed on an annual basis. 

TABLE 105.6.20 

PERMIT AMOUNTS FOR HAZARDOUS MATERIALS  

TYPE OF MATERIAL   | AMOUNT 

Combustible Liquids    |  See Section 105.6.16 

Corrosive Materials:   ‍ ‍

   Gases    | See Section 105.6.8 

   Liquids    | 55 Gallons 

   Solids    | 1000 Pounds 

Explosive Materials    | See Section 105.6.14 

Flammable Materials: 

   Gases    | See Section 105.6.8 

   Liquids    | See Section 105.6.16 

   Solids    | 100 Pounds 

Highly Toxic Materials: 

   Gases    | See Section 105.6.8 

   Liquids    | Any Amount 

   Solids    | Any Amount 

Organic Peroxides :

   Liquids 

      Class I     | Any Amount 

      Class II     | Any Amount 

      Class III     | 1 Gallon 

      Class IV     | 2 Gallons 

      Class V     | No Permit Required 

   Solids 

      Class I     | Any Amount 

      Class II     | Any Amount 

      Class III     | 10 Pounds 

      Class IV     | 20 Pounds 

      Class V     | No Permit Required 

Oxidizing Materials: 

   Gases     | See Section 105.6.8 

   Liquids:   

      Class 4     | Any Amount 

      Class 3     | 1 Gallon

      Class 2     | 10 Gallons  

      Class 1     | 55 Gallons 

   Solids :

      Class 4     | Any Amount 

      Class 3     | 10 Pounds 

      Class 2     | 100 Pounds 

      Class 1     | 500 Pounds 

Pyrophoric Materials :

   Gases      | Any Amount 

   Liquids      | Any Amount 

   Solids      | Any Amount 

Toxic Materials :

   Gases      | See Section 105.6.8 

   Liquids      | 10 Gallons 

   Solids      | 100 Pounds 

Unstable (Reactive) Materials :

   Liquids :  ‍ ‍

      Class 4      | Any Amount 

      Class 3      | Any Amount 

      Class 2      | 5 Gallons 

      Class 1      | 10 Gallons 

   Solids 

      Class 4      | Any Amount 

      Class 3      | Any Amount 

      Class 2      | 50 Pounds 

      Class 1      | 100 Pounds 

Water-reactive Materials 

   Liquids :

      Class 3      | Any Amount 

      Class 2      | 5 Gallons 

      Class 1      | 55 Gallons 

   Solids :

      Class 3      | Any Amount 

      Class 2      | 50 Pounds 

      Class 1      | 500 Pounds 

Fees: $300.00 Annually 

Requirements: A Hazardous Material permit will be issued once an application has been completed appropriately, all applicable documents have been uploaded.  

Applications will be completed electronically, and all required documentation shall be uploaded electronically. There shall be no paper submissions. Permit application shall be completed and submitted through the approved Harris County software program. Once the application is received along with all required documentation, the Fire Code Official will conduct a review. When the permit process is complete, and authorization is given, the applicant will be notified that the permit is issued, and the duration of the permit will be indicated.  

All Hazardous Material permit applications will begin with generalized information requirements. This information will pertain to the property information/property owner’s information/application information/project name.  

When applying for a Hazardous Material operational permit the applicant shall provide the following information: 

• Site map identifying where all hazardous materials are being stored, including maximum quantity and storage configuration. Also identify hazardous monitoring locations, location of all on-site fire suppression to include fire pumps, ponds, water supplies, layout of fire lanes, gas meter, and Knox Box if installed. If renewing a hazardous materials operational permit and no changes have been made to your facility from previous permit cycle, a written statement claiming no changes have been made can be submitted in lieu of plans; 

• A drawing/ floor plan of building including all entrance and exits, location of primary and secondary exit routes, locations of fire extinguishers, fire protection system panels, risers, and/or other fire protection control systems and/or panels, etc. If renewing an hazardous materials operational permit and no changes have been made to your facility from previous permit cycle, a written statement claiming no changes have been made can be submitted in lieu of plans; 

• Copy of the emergency plan, compliant with Chapter 4 of the International Fire Code, current adopted edition; 

• Information on types of fire alarm systems installed and last inspection date (provide last inspection report or photo of current inspection tag(s). This shall include all fire alarm systems or other gas detection systems at the facility; 

• Information on installed sprinkler systems and last inspection date (provide last inspection report or photo of current inspection tag(s). This shall include all fire sprinkler systems at the facility; 

• Information on fire extinguishers or any type of alternate (including but not limited to automatic hood suppression, paint booth systems, clean agent) fire protection system installed and last inspection date (provide last inspection report or photo of current inspection tag(s)); 

• Detailed written description of the on-site operation (retail, manufacturing, storage, use, etc.); 

• Copy of the approved/up-to-date Hazardous Materials Inventory Statement; 

• A written statement certifying storage and use of hazardous materials is in compliance with 2018 International Fire Code (IFC) Chapters 50-67. 

If one or more of the requested documents does not apply to your location, please submit in writing a reason for not submitting.  

Denial: If it is determined that an application fails to meet the requirements as set forth in this standard or the applicant refuses to provide all required documentation, the fire code official shall not issue a permit, but shall return the application to the applicant with explanation for refusal.  

Revocation: The fire code official is authorized to revoke a permit where it is found that there has been false statements or misrepresentation as to the material facts in the application or supporting documentation on which the approval and issuance was based, the permit was issued to a different person or firm than named on the permit, the permittee failed, refused or neglected to comply with orders or notices duly served in accordance with the provisions of this code within the time provided therein, or the permit was issued in error or in violation of an ordinance, regulation or this code.