1.1 本指南帮助个人或机构确定合适的位置，并选择合适的采样策略，以监测非城市位置的大气沉降。它并不是要讨论设计大气沉降监测网络的所有方面。 1.2 本指南适用于获得酸性沉积中发现的主要无机成分和微量金属的估计值。它处理湿沉降和干沉降，包括云水、雾和雪。 1.3 本指南最适合用于确定非城市地区的大气沉降估计值，尽管提出的许多采样方法可应用于城市环境。 1.4 以国际单位制表示的数值应视为标准值。 本标准不包括其他计量单位。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 该指南将各种北美大气沉降监测项目中经常使用的选址标准和采样策略合并为一份文件。 4.2 本指南引导用户完成了选址、采样频率和采样设备选择的步骤，并介绍了获得代表性沉积样品以进行后续化学分析所需的质量保证技术和其他注意事项。 4.3 指南扩展了实践 D1357 包括大气沉降（包括酸性沉降）采样的具体指南。

1.1 This guide assists individuals or agencies in identifying suitable locations and choosing appropriate sampling strategies for monitoring atmospheric deposition at non-urban locations. It does not purport to discuss all aspects of designing atmospheric deposition monitoring networks. 1.2 The guide is suitable for use in obtaining estimates of the dominant inorganic constituents and trace metals found in acidic deposition. It addresses both wet and dry deposition and includes cloud water, fog and snow. 1.3 The guide is best used to determine estimates of atmospheric deposition in non-urban areas although many of the sampling methods presented can be applied to urban environments. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 The guide consolidates into one document, siting criteria and sampling strategies used routinely in various North American atmospheric deposition monitoring programs. 4.2 The guide leads the user through the steps of site selection, sampling frequency and sampling equipment selection, and presents quality assurance techniques and other considerations necessary to obtain a representative deposition sample for subsequent chemical analysis. 4.3 The guide extends Practice D1357 to include specific guidelines for sampling atmospheric deposition including acidic deposition.