Various cleanup sites use this nomenclature for groundwater reporting. For example, the Dewey/Kensington Service Center Report contains specific analytical results for designated wells. 2. Electrical Engineering & GPS Technology
The 2023 Annual Groundwater Monitoring Report includes data for various monitoring wells, often cited in site-specific appendices. Download File MW _23 (1).pdf
If your query relates to research on low-power electronics, the file likely refers to a highly cited paper detailing a specific chip: Various cleanup sites use this nomenclature for groundwater