1.1本规程仅限于评估非金属材料在使用条件下与土壤自然环境接触时的微生物敏感性的方法。本规程适用于不大于约2 cm（0.79 in.）的固体材料试样厚100厘米 2. （15.5英寸。 2. )或在成膜材料上，例如可以至少50×50 mm（2×2 in.）的薄膜形式进行测试的涂层在尺寸上。这种做法可适用于在土壤中使用寿命不长的物品。 1.2根据材料或物品的特性，多种性能可能会受到微生物侵蚀的影响。标准方法（如可用）应用于待评估的每个不同属性。这种做法并不试图列举所有可能的相关属性，也不为这些属性指定最合适的测试。 然而，测试方法必须适用于所测试的材料。 1.3用于土壤掩埋的材料在掩埋前通常会暴露在太阳辐射和其他天气因素下一段时间。因为这些暴露可能会改变材料抵抗土传微生物影响的能力，建议将该实践与适当的环境暴露（例如，太阳模拟风化装置、延长水接触的水解作用或外来营养物）或制造成物品（例如，接缝的粘合剂）相结合，这可能会提高材料使用寿命期间的微生物敏感性。 1.4以国际单位制表示的数值应视为标准值。 括号中给出的值仅供参考。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 3.1这些结果可用于比较材料暴露于本试验程序时的敏感性。 3.2微生物敏感性可以通过许多变化来反映，包括染色、重量损失或拉伸或弯曲强度降低。 3.3本规程可被视为接种真菌和细菌的混合培养物。

1.1 This practice is limited to the method of conducting an evaluation of a nonmetallic material's microbiological susceptibility when in contact with the natural environment of the soil under use conditions. This practice is intended for use on solid material test specimens that are no larger than approximately 2 cm (0.79 in.) thick and 100 cm 2 (15.5 in. 2 ) or on film forming materials such as coatings which may be tested in the form of films at least 50 by 50 mm (2 by 2 in.) in size. This practice may be applied to articles that do not spend the majority of their service life in soil. 1.2 A wide variety of properties may be affected by microbial attack depending on material or item characteristics. Standard methods (where available) should be used for each different property to be evaluated. This practice does not attempt to enumerate all of the possible properties of interest nor specify the most appropriate test for those properties. Test methods must, however, be appropriate to the material being tested. 1.3 Materials intended for use in soil burial applications are often subjected to periods of exposure to solar radiation and other elements of weather for some time before they are buried. Because these exposures may alter the ability of a material to resist the effects of soil-borne microorganisms, it is recommended that this practice be combined with appropriate environmental exposures (for example, solar simulating weathering devices, the hydrolytic effects of extended aqueous contact, or extraneous nutrients) or fabrication into articles (for example, adhesive bonding of seams) which may promote microbiological susceptibility during the service life of the material. 1.4  The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information purposes only. 1.5 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 3.1 These results may be used to compare the susceptibility of materials when exposed to this test procedure. 3.2 Microbiological susceptibility may be reflected by a number of changes including staining, weight loss, or reduction in tensile or flexural strength. 3.3 This practice may be considered an inoculation with a mixed culture of fungi and bacteria.