1.1 这种做法基于公认的方法，通过这些方法，可以设计和安装直接推动监测井，以检测污染物的存在或不存在，并收集有代表性的地下水质量数据。本文的设计标准和安装程序适用于设施的检测和评估监测程序。 1.2 本实践中提出的建议监测井设计基于这样一种假设，即该计划的目标是从含水层中获得具有代表性的地下水信息和水质样本。按照这种做法建造的监测井应为砾石到粉砂等颗粒状含水层材料提供相对无浊度的样本。 1.3 直接推动程序不适用于在所有地质和土壤条件下监测井的安装（例如，在基岩中的安装）。其他旋转钻井程序可用于钻井施工中这些固结材料的渗透（指南 D5092/D5092米 ). 此外，在某些地质条件下，可能适合安装不带过滤器组的监测井 ( 1. , 2. ) 2. 指导 D6724/D6724米 可以参考以获得关于地下水监测井的直接推动安装的这些和其他方法的附加信息。 1.4 括号中以英寸磅单位或国际单位表示的数值应单独视为标准。每个系统中规定的值可能不是完全相等的；因此，每个系统应独立使用。 将两个系统的值合并可能导致不符合标准。 1.5 所有观测值和计算值应符合实践中制定的有效数字和四舍五入指南 D6026 ，除非被本标准取代。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 此实践提供了一套用于执行一个或多个特定操作的说明。本文件不能取代教育或经验，应与专业判断结合使用。并非此做法的所有方面都适用于所有情况。 本ASTM标准并不代表或取代必须判断给定专业服务是否充分的护理标准，也不应在未考虑项目许多独特方面的情况下应用本文件。本文件标题中的“标准”一词仅表示该文件已通过ASTM共识程序批准。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 本规程旨在向用户提供有关通过直接推动方法安装预填充筛网监测井的适当方法和程序的信息。 监测井可用于获得水相污染物或其他感兴趣的分析物（有机或无机）的代表性水质样品 ( 3. , 6. 8. ) 监测井也可用于获得关于局部含水层的电位表面和地层性质（例如水力传导性或透射率）的信息。 5.2 使用直接推动方法安装监测井可以显著减少在受污染场地安装井期间产生的潜在危险钻屑量。这可以显著降低环境现场调查和地下水监测项目的成本。最大限度地减少危险废物的产生也减少了对现场工人、当地居民和环境的暴露危害。 5.3 用于监测油井安装的直接推动方法仅限于在松散地层中使用，如冲积层/溪流沉积物、冰川沉积物和海滩型沉积物。直接推进法通常能成功穿透粘土、淤泥、沙子和一些砾石。沉积物，如具有厚杯状层的土壤，或具有大鹅卵石或巨石的冰川耕作地，可能很难或不可能渗透到所需深度。直接推进法不适用于穿透石灰岩、花岗岩或片麻岩等固结基岩。 注1: 本标准产生的结果的质量取决于执行该标准的人员的能力以及所用设备和设施的适用性。符合实践标准的机构 D3740 通常被认为有能力进行合格和客观的测试/取样/检查等。本标准的用户应注意遵守实践 D3740 其本身不能保证可靠的结果。可靠的结果取决于许多因素；实践 D3740 提供了评估其中一些因素的方法。 实践 D3740 是为从事土壤和岩石实验室测试和/或检查的机构开发的。因此，它并不完全适用于从事这一实地工作的机构。然而，该实践的使用者应认识到，实践的框架 D3740 适用于评估执行此做法的机构的质量。目前还没有已知的合格的国家当局来检查执行这种做法的机构。

1.1 This practice is based on recognized methods by which direct push monitoring wells may be designed and installed for the purpose of detecting the presence or absence of a contaminant, and collecting representative groundwater quality data. The design standards and installation procedures herein are applicable to both detection and assessment monitoring programs for facilities. 1.2 The recommended monitoring well design, as presented in this practice, is based on the assumption that the objective of the program is to obtain representative groundwater information and water quality samples from aquifers. Monitoring wells constructed following this practice should produce relatively turbidity-free samples for granular aquifer materials ranging from gravels to silty sand. 1.3 Direct push procedures are not applicable for monitoring well installation under all geologic and soil conditions (for example, installation in bedrock). Other rotary drilling procedures are available for penetration of these consolidated materials for well construction purposes (Guide D5092/D5092M ). Additionally, under some geologic conditions it may be appropriate to install monitoring wells without a filter pack ( 1 , 2 ) 2 . Guide D6724/D6724M may be referred to for additional information on these and other methods for the direct push installation of groundwater monitoring wells. 1.4 The values stated in either inch-pound units or SI units presented in brackets are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.5 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026 , unless superseded by this standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This practice offers a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgement. Not all aspects of this practice may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of the project's many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process. 1.8 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 ====== 5.1 This practice is intended to provide the user with information on the appropriate methods and procedures for installing prepacked screen monitoring wells by direct push methods. The monitoring wells may be used to obtain representative water quality samples for aqueous phase contaminants or other analytes of interest, either organic or inorganic ( 3 , 6- 8 ) . The monitoring wells may also be used to obtain information on the potentiometric surface of the local aquifer and properties of the formation such as hydraulic conductivity or transmissivity. 5.2 Use of direct push methods to install monitoring wells can significantly reduce the amount of potentially hazardous drill cuttings generated during well installation at contaminated sites. This may significantly reduce cost of an environmental site investigation and groundwater monitoring program. Minimizing generation of hazardous waste also reduces the exposure hazards to site workers, local residents, and the environment. 5.3 Direct push methods for monitoring well installation are limited to use in unconsolidated formations such as alluvial/stream sediments, glacial deposits, and beach type sediments. Direct push methods are generally successful at penetrating clays, silts, sands and some gravel. Deposits such as soils with thick caliche layers, or glacial tills with large cobbles or boulders may be difficult or impossible to penetrate to the desired depth. Direct push methods are not designed for penetration of consolidated bedrock such as limestone, granite or gneiss. Note 1: The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors. Practice D3740 was developed for agencies engaged in the laboratory testing and/or inspection of soils and rock. As such, it is not totally applicable to agencies performing this field practice. However, user of this practice should recognize that the framework of Practice D3740 is appropriate for evaluating the quality of an agency performing this practice. Currently there is no known qualifying national authority that inspects agencies that perform this practice.