Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Records in the subsurface database are classified into one of three categories that best characterizes the data contained within the borehole record. The classifications are:</SPAN></P><P><SPAN>Geotechnical: Boreholes and pits created with the intent to gain a detailed understanding of the subsurface lithology and soil or rock properties therein. These records have additional data beyond lithologic descriptions, including penetrometer resistance, shear and strength tests, and density measurements. The additional materials testing allows for a more detailed understanding of subsurface material properties.</SPAN></P><P><SPAN>Lithologic borings: These boreholes are drilled solely for the purpose of identifying subsurface lithology. Unlike geotechnical borings, material testing techniques were not used (or the results are not provided) for lithologic borings.</SPAN></P><P><SPAN>Test pits: Generally shallow excavations with either hand tools or mechanical equipment that are typically less than 20 feet in depth though may expose a greater area or "working face" to observe the subsurface lithology. Material testing techniques were not used on these pits, or the results are not provided.</SPAN></P></DIV></DIV></DIV>
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Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Water wells have been compiled from various sources, mostly from the Washington Department of Ecology. The selection of wells shown in this dataset have been used in published geologic research by the Washington Geological Survey and were determined to be of high quality. The locations of these wells may have been refined from their original source. For the complete database, visit the Department of Ecology’s website.</SPAN></P></DIV></DIV></DIV>
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