Location, description and quantification of significant
natural and man-made features on and surrounding the site, including
topography, all impervious surfaces, soil and drainage characteristics,
with particular attention to the location and description of presently
existing surface water runoff control devices, mechanisms or areas,
swamps, floodplains, swales, woods and vegetation, steep slopes and
other features critical to the purposes of this chapter. Contours
shall be shown at five-foot intervals for slopes averaging 12% or
more and at two-foot intervals for land of lesser slope.