Ovde dajem sledeće vezano za grejder (građevinsku mašinu) samo zbog terminologije, kao objašnjenje; planiranje se ne mora nužno raditi ovom mašinom, pogotovu ne u temeljnoj jami.
http://www.gramak.com/grejderi.html
Grejder (engl. grader, motor grader) je vrlo brza, pokretljiva mašina za razastiranje, planiranje i oblikovanje svih vrsta rastresitih materijala.

http://en.wikipedia.org/wiki/Grader
A grader, also commonly referred to as a road grader, a blade, a maintainer, or a motor grader, is a construction machine with a long blade used to create a flat surface.

In civil engineering, the grader's purpose is to "finish grade" (refine, set precisely) the "rough grading" performed by heavy equipment or engineering vehicles such as scrapers and bulldozers.

http://www.thefreedictionary.com/grading
v. grad·ed, grad·ing, grades
4. To level or smooth to a desired or horizontal gradient: bulldozers graded the road.

http://www.cityofgrassvalley.com/services/departments/engine...
C. Fine Grading - All planting areas shall be finish graded to a smooth even plane with no abrupt change of surface. Tops and toes of slopes shall be rounded to produce gradual transitions.
grading - 1. granulacija; 2. ravnanje; 3..., ref. Građevinski rečnik, B. Vukičević

Mislim da bi moglo i "levelled":
Bottom of the foundation pit shall be levelled both in longitudinally and transverse direction. It shall be free of loose unconsolidated material. Should any of the excavation be carried down to a level below the specified level, the CONTRACTOR shall fill such extra excavation with 1:4:8 nominal mix concrete at his own expense, well rammed in position until it is brought up to the proper level.