IICRC R520-2015是为从事模具修复行业的人员编写的，主要针对模具修复公司和工人，其次针对调查或评估模具投诉、制定修复规范、协议或程序以及管理修复项目的其他人员（例如室内环境专业人员（IEP）、其他专业专家），最后，其他潜在的重大利益相关方（例如，消费者和住户、财产所有者和管理者、保险公司代表、政府和监管机构）。S520是一种程序标准。它基于可靠的修复原则、对现有科学和行业文献、信息和实践经验的审查。此外，还与许多其他来源进行了广泛协商，并从中获得了信息。 S520的第二版已经更新和重写。增加了一章和一节，涵盖建筑和材料科学，增加了一节，涵盖设备、工具和材料。本文件取代IICRC S520《专业模具修复标准和参考指南》（S520第一版，2003年、2004年和2008年）。“ANSI/IICRC S520标准总结了模具修复项目的大多数重要程序和方法，而IICRC S520参考指南重申并进一步解释了这些程序和方法，并提供了支持该标准的额外背景信息。尽管参考指南中的材料不具有官方地位在一个标准中，这两个部分是相辅相成的，应该始终同时考虑。

IICRC R520-2015 is written for use by those involved in the mold remediation industry, primarily for mold remediation companies and workers, and secondarily, for others who investigate or assess mold complaints, prepare remediation specifications, protocols or procedures, and manage remediation projects, (e.g., indoor environmental professionals (IEPs), other specialized experts) and finally, for other potential materially interested parties (e.g., consumers and occupants, property owners and managers, insurance company representatives, government and regulatory bodies).The S520 is a procedural standard. It is based on reliable remediation principles, review of available scientific and industry literature and information and practical experience. In addition, there has been extensive consultation with, and information obtained from, numerous other sources. The Second Edition of the S520 has been updated and rewritten. An additional Chapter and Section have been added covering Building and Material Science, and an additional section has been added covering Equipment, Tools and Materials. This document supersedes the IICRC S520 Standard and Reference Guide for Professional Mold Remediation (S520 First Edition 2003, 2004 and 2008)."The ANSI/IICRC S520 Standard summarizes most of the significant and important procedures and methodologies of a mold remediation project, while the IICRC S520 Reference Guide restates and further explains those procedures and methodologies, and provides additional background information, which supports the Standard. Although the material in the Reference Guide does not carry the official status of a Standard, the two sections complement one another and should always be considered in tandem.