Grounding of Gasoline Storage Tanks

Document Number: [SWP-NUMBER]

Revision Date: [DATE]

Next Review Date: [NEXT REVIEW DATE]

Department: [DEPARTMENT NAME]

1. Scope

This Safe Work Procedure (SWP) outlines the necessary steps for safely grounding gasoline storage tanks to prevent static electricity buildup and potential explosion hazards. It applies to all personnel involved in the storage, handling, and dispensing of gasoline. This procedure is designed to comply with relevant safety regulations and industry best practices.

2. Definitions

Ground A low-resistance connection to the earth, providing a path for electrical current to flow safely. Static Electricity The accumulation of electric charge on a surface, which can discharge as a spark. Grounding A temporary connection between a conductive object and ground to equalize electrical potential. Gasoline A flammable liquid derived from petroleum, used as a fuel. Explosion A potentially violent event caused by the rapid expansion of gases, often due to ignition of flammable vapors.

3. Responsibilities

3.1 Supervisors

Ensure all workers are properly trained and competent in grounding procedures.
Provide the necessary grounding equipment and ensure it is maintained in good working order.
Conduct regular inspections of grounding equipment and procedures.
Enforce all safety rules and regulations related to grounding.
Investigate all incidents and implement corrective actions.

3.2 Workers

Inspect grounding equipment before each use to ensure it is in good working condition.
Follow all grounding procedures as outlined in this document.
Report any hazards or incidents immediately to the supervisor.
Participate in pre-job briefings and training sessions.
Use the correct grounding equipment for the specific task.

3.3 Health and Safety Representative

Participate in safety inspections and audits related to grounding procedures.
Provide input on the development and improvement of grounding procedures.
Investigate incidents and make recommendations for corrective actions.
Promote a culture of safety and awareness regarding grounding hazards.

4. Potential Hazards and Risks

Hazard	Risk	Control Measures
Static electricity buildup	Ignition of gasoline vapors, leading to fire or explosion.	Use certified grounding cables and clamps. Ensure proper connection to the tank and a designated grounding point. Regularly inspect grounding equipment for damage.
Flammable gasoline vapors	Inhalation of vapors, fire, or explosion.	Ensure proper ventilation in the area. Use intrinsically safe equipment and tools. Monitor the atmosphere for flammable vapors.
Improper grounding techniques	Ineffective grounding, leading to static electricity buildup and potential ignition.	Provide training on proper grounding procedures. Ensure workers are competent and follow safety protocols. Supervise the work to ensure compliance.
Exposure to fire or explosion	Burns, injuries, or fatalities.	Use appropriate PPE, including fire-resistant clothing, safety glasses, and gloves. Ensure PPE is in good condition and used correctly.
Faulty grounding equipment	Ineffective grounding, leading to static electricity buildup and potential ignition.	Regularly inspect grounding equipment for damage or wear. Replace damaged equipment immediately. Keep grounding points clean and free of corrosion.
Electrical shock	Electrocution or electrical burns.	Implement a lockout/tagout procedure to isolate the tank from any electrical sources. Verify the tank is de-energized before grounding.

5. Personal Protective Equipment (PPE)

Anti-static clothing: Provides protection against static discharge and potential ignition of flammable vapors.
Safety glasses: Protects eyes from splashes and debris.
Insulated gloves: Provides insulation and protection against electrical hazards.
Safety boots (steel-toe, anti-static): Protects feet from impact and static discharge.

6. Equipment and Tools

Grounding cables and clamps: Used to create a temporary electrical connection between the tank and a designated grounding point.
Multimeter or continuity tester: Used to verify the effectiveness of the grounding connection.
Wire brush: Used to clean grounding points and ensure good electrical contact.
Wrench: Used to tighten and secure grounding clamps.

8. Safe Work Procedure Steps

Isolate and De-energize the Tank: Ensure the gasoline storage tank is properly isolated and de-energized. Follow lockout/tagout procedures to prevent accidental energization.
Inspect the Tank and Surrounding Area: Visually inspect the tank for any signs of damage, leaks, or corrosion. Ensure the area is clear of any flammable materials.
Prepare Grounding Points: Clean the grounding point on the tank and the designated grounding point using a wire brush to remove any dirt, rust, or corrosion.
Connect Grounding Cable to Grounding Point: Connect one end of the grounding cable to the designated grounding point (e.g., grounding rod or building ground). Ensure a secure and tight connection.
Connect Grounding Cable to Tank: Connect the other end of the grounding cable to the grounding point on the gasoline storage tank. Ensure a secure and tight connection.
Verify Grounding Connection: Use a multimeter or continuity tester to verify the grounding connection. Ensure there is a low-resistance path between the tank and the grounding point.
Proceed with Work: Once the grounding is verified, proceed with the intended work on the gasoline storage tank.
Disconnect Grounding Cable: After completing the work, disconnect the grounding cable from the tank and the grounding point. Store the grounding equipment in a safe and dry place.
Inspect Grounding Equipment: Inspect the grounding equipment for any damage or wear. Replace any damaged equipment immediately.
Document Grounding Procedure: Document the grounding procedure, including the date, time, location, and the name of the person who performed the grounding. Keep records for future reference.

9. Precautions and Safety Measures

Ensure all personnel involved in grounding procedures are properly trained and competent.
Never smoke or use open flames in the vicinity of gasoline storage tanks.
Always use intrinsically safe equipment and tools in areas where flammable vapors may be present.
Regularly inspect grounding equipment for damage or wear and replace as needed.
Clean up any spilled fuel or lubricants immediately to prevent fire hazards.

10. Emergency Procedures

10.1 General Emergency Response

In the event of a fire or explosion, immediately activate the emergency alarm, evacuate the area, and contact emergency services.

10.2 Specific Emergency Scenarios

Fire or explosion: Immediately shut down all equipment, evacuate the area, and contact emergency services. Use a fire extinguisher to control the fire if it is small and contained.
Personnel injury: Provide first aid and contact emergency services if necessary. Investigate the cause of the injury and implement corrective actions.
Gasoline spill: Contain the spill and clean it up immediately. Dispose of contaminated materials properly. Report the spill to the appropriate authorities.

10.3 Emergency Contact Information

Emergency Contact: 911

11. Incident Reporting and Investigation

All incidents, including near misses, must be reported to the supervisor immediately. A written report must be submitted within 24 hours of the incident.

All incidents will be investigated to determine the root cause and implement corrective actions to prevent recurrence. The investigation will be conducted by a team of qualified personnel.

Approved by: [NAME AND POSITION]

Date: [APPROVAL DATE]