The wash level underneath the topsoil. 5YR 3/2 dark redish brown; A horizon, blocky, friable; loam; non-sticky, non-plastic. Elevations from datum 7. North start: -0.31 end -0.31; east start -1.01 end ; south start -0.91 end ; west start -0.30 end : center start -0.58 end -0.58.