本文件确立了马歇尔航天飞行中心（MSFC）控制环境区域的标准设计和运行标准，包括空气中颗粒物水平的标准空气清洁度等级，以及洁净室和清洁工作区中颗粒物和可冷凝物控制的标准操作。它规定了设施清洁度和洁净室服装清洁度的验证和监测方法。

This document establishes Marshall Space Flight Center (MSFC's) standard design and operational criteria for controlled environmental areas including standard classes of air cleanliness for airborne particulate levels and standard operations for control of particulate and condensables in cleanrooms and clean work areas. It prescribes methods for verification and monitoring of facility cleanliness and cleanliness of cleanroom garments.