IICRC S500 与 S520 是什么
What are IICRC S500 and S520
IICRC S500 是职业水损害修复的行业标准，定义水的类别（1/2/3 类）与损害等级（1-4 级）、干燥协议与文档要求；S520 是职业霉菌修复标准，规定评估、围挡、修复程序与修复后验证（PRV）。两者共同构成灾后修复的作业框架。
IICRC S500 is the industry standard for professional water damage restoration, defining water categories (1/2/3), classes of damage (1-4), drying protocols and documentation. S520 is the standard for professional mold remediation, covering assessment, containment, remediation and post-remediation verification (PRV). Together they frame disaster-restoration work.
24-48 小时霉变窗口
The 24-48 hour mold window
EPA 指出，材料在 24-48 小时内干燥通常不长霉；一旦超过该窗口，原本的 1 类清水也会在约 24-48 小时内退化为 2/3 类污染水。因此快抽水、快干燥是成本最低的防霉手段，拖延会直接把清洁升级为霉菌修复。
The EPA notes materials dried within 24-48 hours usually do not grow mold; past that window, even Category 1 clean water degrades to Category 2/3 within roughly 24-48 hours. Fast extraction and drying are therefore the cheapest mold prevention — delay turns cleanup into full remediation.
第一步：快速抽水（水/干两用工业吸尘器）
Step one: fast extraction (wet/dry industrial vacuum)
用大流量水/干两用工业吸尘器抽除积水，限制结构损害与微生物滋生。越早抽水，后期干燥与保险理赔越顺利；经验上拖延一天就多一分霉变与拒赔风险。
Use a high-capacity wet/dry industrial vacuum to remove standing water, limiting structural damage and microbial growth. The sooner you extract, the smoother drying and insurance claims become; each day delayed adds mold and denial risk.
HEPA 空气 scrubber 与负压围挡
HEPA air scrubber and negative-air containment
霉菌修复（S520）要求用 6 mil 塑料布建立临界围挡，并以 HEPA 过滤的负压制空气 scrubber 持续运行，防止孢子外逸污染洁净区；受污染碎屑用 HEPA 真空收集。
Mold remediation (S520) requires critical barriers of 6-mil poly sheeting with HEPA-filtered negative-air machines running continuously to stop spore escape; contaminated debris is collected with a HEPA vacuum.
重污与异味：高压清洗机
Heavy soil and odour: pressure washer
受 2/3 类水污染的表面、地下室、车库地面，用高压清洗机冲洗后再消毒，去除顽固污渍与异味源，恢复可使用状态。
Surfaces, basements and garage floors contaminated by Category 2/3 water are rinsed with a pressure washer before disinfection, removing stubborn soil and odour sources and restoring a usable state.
消毒喷洒：喷雾器
Disinfection spraying: sprayer
用喷雾器将 EPA 注册的抗菌剂均匀喷洒到多孔与非多孔表面，按 S500 对 2/3 类水的处理要求做清洁与消毒，并避免过度用药。
A sprayer applies an EPA-registered antimicrobial evenly to porous and non-porous surfaces, meeting S500 handling for Category 2/3 water while avoiding chemical overuse.
文件与验收：湿度读数 + PRV
Documentation and acceptance: moisture readings + PRV
按 S500 每日记录湿度读数，目标石膏板含水率 ≤19%、木结构 ≤16%；修复完成后由独立机构做空气检测（PRV）验收，确认室内孢子数回到基线方可重新入住。
Per S500, log daily moisture readings with a target of ≤19% in drywall and ≤16% in timber; after remediation, an independent air test (PRV) confirms indoor spore counts return to baseline before re-occupancy.