After years of volunteer efforts and thousands of hours in collaboration, the Institute of Inspection, Cleaning and Restoration Certification (IICRC) has released the fourth edition of the ANSI/IICRC S520-2024 Standard for Professional mold remediation. Written and edited by industry professionals, the S520 Standard is the authoritative resource for reasonably prudent members of the trade who are recognized in the mold remediation industry as qualified and competent. This comprehensive update reflects the latest scientific research, updated methodologies, and regulatory considerations designed to improve remediation processes for mold impacted properties.
Purpose, Scope, and Application
The ANSI/IICRC S520: 2024 Standard supersedes the third edition published in 2015 and is a critical guide for professionals engaging in mold remediation. It outlines the standard of care to be followed when addressing mold issues in numerous types of building environments and their associated mechanical systems, as well as the contents within them.
The S520 is a voluntary consensus-based Standard for the cleaning and restoration industry. It is designed for use by professional mold remediation companies, workers, indoor environmental professionals (IEPs), and other stakeholders involved in mold assessment, remediation planning, and project management. Additionally, it provides valuable insights for property owners and managers, insurance representatives, and regulatory bodies. The S520 also serves attorneys involved in personal injury lawsuits. Landlords, realtors, and property managers also refer to the document to keep their maintenance staff informed regarding the correct procedures to be used with their guests or those purchasing or selling properties. The Standard also informs and advises home inspectors, building contractors, and even consumers interested in making sure their mold remediation contractor is following the industry Standard.
Most people understand that water damage can result in the formation of mold growth, which is damaging to properties. However, because human exposure to elevated levels of mold can be very harmful to health, the need for responsible remediation has never been more critical.
Now, let’s get into the key updates in the newest edition:
1. Refined Definitions and Terminology
The 2024 edition of the Standard introduces many enhanced definitions that clarify the conditions under which mold remediation is necessary. Notably, the term “airborne” has been added to the definition of Condition 2, highlighting the significance of airborne mold spores in indoor environments. Furthermore, the inclusion of “mycotoxins” and “extracellular matrix (ECM)” in Condition 2 recognizes the complex nature of mold contamination and its potential impact on human health. The Standard now also specifies that remediation efforts should address these components, when they are confirmed through appropriate sampling methods.
2. Emphasis on Source Removal
While all versions of the S520 promote source removal as the preferred method of remediation, a significant emphasis in the 2024 standard places greater focus on source removal as the primary method for mold remediation. Section 2, “Mold Cleaners, Antimicrobial Chemicals, and Coatings as Remediation Tools,” strongly advises against the practice of simply spraying mold-contaminated areas with chemicals, disinfectants, and other biocides without first physically and completely removing the mold, then thoroughly cleaning the surfaces. These procedures focus on preventing the hiding of underlying issues and promoting a better project outcome.
3. Revised Guidelines on Biocide Use
The updated Standard places deeper analysis of when and how to use biocides, including using ozone gas and other antimicrobial devices. Section 9.1.7, Ozone Gas and Other Antimicrobial Devices, advises that these methods and substances should not be relied upon as primary remediation tools. Instead, their application should be considered supplementary and used judiciously only after comprehensive source removal and cleaning procedures have been employed.
4. New Content on Mycotoxins
The new Standard addresses mycotoxins 56 times. The consensus is that mycotoxins can be effectively remediated and removed by following the same remediation process and methods for source removal and cleaning with a special note that chemical processes are unable to return to Condition 1 by themselves.
5. Enhanced Communication and Documentation
The requirement for better communication is underscored in the new 2024 edition by the necessity for detailed documentation and maintaining transparent communication among all parties involved in a remediation project. Special insurance coverage, called Pollution Liability with a mold endorsement, is recommended to protect you and your business. Insurance information has been further clarified in this new edition. Sections 6.3.4, Documentation of Limitations and Deviations, and 9.3.9, Deviation from Removal Processes, highlight the need for written justification when deviating from the standard of care. This ensures accountability and maintains the integrity of the remediation process.
6. Post-Remediation Evaluation and Verification
The Standard introduces specific procedures for post-remediation evaluation by remediators and verification by Indoor Environmental Professionals (IEPs). Section 9.3.12, Post Remediation Evaluation (PRE) outlines the responsibilities of remediation restoration professionals to implement internal quality control measures to confirm the completion and effectiveness of the remediation efforts. As stated in Section 9.3.13, Post Remediation Verification (PRV) is a PRV only when performed by an independent third-party IEP, thus ensuring that the remediation meets recognized standards and that the indoor environment is safe for human occupancy.
Implications for Industry Professionals
The release of ANSI/IICRC S520: 2024 encompasses critical advancements in mold remediation practices. Professionals in the field must familiarize themselves with the updated guidelines to ensure compliance and to deliver quality, effective microbial remediation services. Following the Standard promotes health and safety while enhancing the credibility and reliability of mold remediation companies.
Conclusion
The 2024 revision of the ANSI/IICRC S520 Standard for Professional Mold Remediation represents a comprehensive update that aligns industry practices with technological advancements and current scientific understanding. Despite advertising by many to the contrary, there are no shortcuts. By emphasizing source removal, refining definitions, and enhancing procedural guidelines, the Standard’s primary goal is to improve the effectiveness and safety of mold remediation work. Professionals in the field are encouraged to adopt these updated practices to ensure the best outcomes for their clients and to uphold the high standards of our industry.
It is so gratifying to develop and write industry standards through the IICRC. Collaborating to raise the bar, which will encourage better quality work, is motivating. I encourage any subject matter experts to volunteer, review and comment, or play a part in the development or revision of any of our numerous Standards.
How Can I Get a Copy?
The ANSI/IICRC S520: 2024 is available for purchase in digital and print formats through the IICRC webstore. In addition, there is a Red Line Version available that compares the previous 2015 edition to the new 2024 edition. It displays all the deleted text in red strikethrough and shows the additions made in green underlined text, making it easy to see the changes.
Jim Pearson is a Certified Mechanical Hygienist and the President and CEO of Mold Inspection Services, Inc. He is also the co-owner of Americlean Corporation, a third-generation, family-owned disaster restoration company that has served the Billings, Montana area for over 45 years.
