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TR21‐97 2.05‐84.11a 06/29/21  <br />test pit excavation/soils boring, and backfilling and leveling of the resultant small area/auger-hole, occurs in a <br />continuous sequence within the course of less than two hours for each location). The geotechnical investigation <br />activities do not involve the use of water and are conducted under dry conditions, so the potential for related <br />hydrologic impacts is negligible. All geotechnical disturbance is reseeded by broadcast seeding within 6-months of <br />disturbance, although natural revegetation typically occurs much sooner due to the limited timeframe and extent of <br />the associated disturbance. Occasionally perforated PVC pipe may be inserted in a completed borehole, and the <br />remainder of the hole backfilled with clean gravel, as a temporary piezometer installation to measure any fluctuation <br />in water-levels. This type of piezometer installation is normally very temporary (typically used less