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D4276-02 – Standard Test Method Technical Guide
This standard practice, D4276-02 (Reapproved 2020), covers recognized procedures necessary to protect the health and safety of workers required to enter confined spaces. These procedures are particularly applicable to entry into confined areas associated with the use of halogenated organic solvents. The standard does not purport to address all safety concerns, and it is the responsibility of the user to establish appropriate safety, health, and environmental practices.
🛡️ Scope and Applicability of D4276-02
Confined areas addressed by this practice include, but are not limited to, vapor degreasers, cold cleaning tanks, storage vessels, tank cars and trucks, van trailers, ships or barges, pits or sumps, and unventilated rooms. While it describes specific safety steps, it is not intended to preclude additional measures deemed necessary for a particular situation, nor does it address the decision strategy involved in requiring entry into a confined space.
| 🟦 Category | 📏 Specific Examples |
|---|---|
| Cleaning Equipment | Vapor degreasers, cold cleaning tanks |
| Storage Vessels | Storage tanks, tank cars, tank trucks |
| Transport Vehicles | Van trailers, ships, barges |
| Structures and Areas | Pits, sumps, unventilated rooms |
⚠️ Significance of Hazards and Safety Protocols
Vapor inhalation is the primary hazard encountered in the use of chlorinated solvents. The greatest potential for overexposure occurs where the employee is exposed to high concentrations of vapor found in confined areas. The seriousness of this hazard is often underestimated by those performing this type of work. Many of these areas qualify as permit-required confined spaces as defined by OSHA (29 CFR 1910.146).
🚨 Critical Hazard: The user must never underestimate the risk of vapor inhalation. Overexposure to high concentrations of halogenated solvent vapors in confined areas presents a serious and potentially fatal health risk.
📋 Procedure and Permit Requirements
All personnel working in confined areas must be properly trained in safe entry and rescue procedures and must have a working knowledge of the hazards that may exist. Entry into confined areas must be by written entry permit, issued by the responsible supervisor or other qualified person. The purpose of the entry permit is to ensure that a checklist of precautions has been reviewed prior to entry.
💡 Key Practice: This practice represents the minimum requirements for entry into any confined area containing halogenated solvents. Users must develop and implement training programs, recordkeeping, and other supplementary requirements as mandated by OSHA’s confined spaces standard (29 CFR 1910.146).
| 🔍 Requirement | ⚡ Description |
|---|---|
| Personnel Training | All workers must be trained in safe entry and rescue procedures (Section 5.1). |
| Written Permit | Entry requires a written permit issued by a qualified supervisor to certify precautions (Section 5.2). |
| Regulatory Compliance | Refer to 29 CFR 1910.146 for permit-required confined space obligations (Section 2.1). |
❓ Frequently Asked Questions
🔍 What is the primary hazard addressed by ASTM D4276-02?
Vapor inhalation is the primary hazard, particularly from high concentrations of halogenated solvent vapors found in confined areas such as degreasers and storage vessels. The seriousness of this hazard is often underestimated by workers.
💡 What is the purpose of a written entry permit as outlined in the standard?
The written entry permit, issued by the responsible supervisor, serves as a checklist of precautions that must be reviewed and approved prior to entry. It ensures that all mandatory safety steps have been evaluated and provides written authorization for the entry.
⚡ Does this standard fulfill all OSHA confined space requirements?
No. While it provides minimum requirements and directly references OSHA’s Permit-Required Confined Spaces standard (29 CFR 1910.146), the user is responsible for fully implementing all aspects of the OSHA standard, including training programs, rescue procedures, and recordkeeping.
📌 Which specific confined areas are covered under this practice?
The practice applies to vapor degreasers, cold cleaning tanks, storage vessels, tank cars and trucks, van trailers, ships or barges, pits or sumps, and unventilated rooms where halogenated solvents are or have been used.