Geotechnical testing may include which of the following procedures?

Geotechnical testing is essential for understanding soil properties and their behavior under various conditions, which is crucial for construction and stormwater management. Compaction tests are a key procedure in geotechnical testing as they assess the density of soil after it has been compacted. This is important for determining the soil's structural integrity and its ability to support loads, which in turn affects the design of foundations, pavements, and other infrastructure.

Compaction tests help ensure that soil meets the required specifications for project safety and performance. Proper compaction reduces the risk of settling and erosion in stormwater management systems, which can lead to failures and environmental issues.

Soil pH testing, while useful for agricultural and environmental assessments, typically does not fall under the category of geotechnical tests explicitly aimed at assessing physical properties of soil behavior in construction contexts. Water quality testing focuses more on the chemical characteristics of water and is crucial for managing and protecting water resources rather than assessing the properties of soil itself. Vegetation health assessments evaluate plant conditions and are more relevant to ecological studies than soil mechanics. Thus, the compaction tests align directly with the goals of geotechnical testing concerning soil characteristics and their applications in construction and stormwater management.