From which sources might a Soil Wash sample be obtained in test method D1140?

In test method D1140, a Soil Wash sample can be obtained from a variety of sources to ensure that the testing is comprehensive and accurate. Bulk samples are typically collected from the site and provide a large amount of soil for analysis, which is essential in understanding the overall properties of the material. Jar samples can be used as they can contain representative soil that has been preserved and collected in manageable quantities. Tube samples also offer a method of extraction that maintains the soil's structure and moisture content, allowing for a more accurate analysis of properties. Additionally, specimens that may have been initially used for testing other properties can be repurposed for the Soil Wash test, providing another avenue for obtaining suitable samples.

This flexibility in sourcing samples is vital because it accounts for variation in soil types and conditions, ensuring comprehensive analysis across different soil conditions and environments. Collecting from multiple sources also helps to verify consistency in test results, enhancing the reliability of the data obtained through the Soil Wash method.