A point on a pervious surface located 7.8 ft perpendicularly from the foundation of a building will have a grade elevation of 367.90 ft. What are the minimum and maximum allowable grade elevations of the ground surface at the foundation allowed by the following drainage code if the land slope in the direction parallel to the foundation is zero and all slopes are man-made?

Minimum Elevation= 386.55 ft (CORRECT) *this was found by (7.8/12) + 367.90 ... the '12' was obtained from the minimum protective slope section*

Maximum Elevation= 369.85 ft (INCORRECT!!!!)

Sec. 12.03.003. - Land grading on residential lots. Iw KI A. The ground on which structures are located shall be graded to carry stormwater runoff away from the buildings and dispose of it without causing water to pond on a private lot. Land grading on residential lots shall comply with the following specific standards: 1. Minimum protective slopes around a dwelling. Grading of pervious areas for a minimum distance of eight (8) feet away from any building shall slope perpendicularly away from the building toward areas designated to accept runoff. The minimum slope in this area shall be twelve (12) feet horizontal to one (1) foot vertical (12:1) (net differential in grade sixty-seven hundredths (0.67) feet) as stated in the BOCA International Building Code. Lesser slopes may be approved in specific cases where application of these requirements is not feasible and where an alternative method of foundation protection is provided to the satisfaction of the Department of Land Use. Where restricted by a property line, the distance may be shortened to the minimum side yard provided in Chapter 40. 2. Maximum protective slopes around a dwelling. In grading of pervious areas for a minimum of four (4) feet from the foundation of any building the slope shall not be steeper than four (4) feet horizontal to one (1) foot vertical (4:1). The maximum man-made slope at any place on a residential lot shall not be steeper than two (2) feet horizontal to one (1) foot vertical (2:1), and any man-made slope steeper than three (3) feet horizontal to one (1) foot vertical (3:1) shall be designed according to the applicable provisions of the Delaware Erosion and Sediment Control Handbook, to ensure slope stability and minimize maintenance requirements. Sec. 12.03.003. - Land grading on residential lots. Iw KI A. The ground on which structures are located shall be graded to carry stormwater runoff away from the buildings and dispose of it without causing water to pond on a private lot. Land grading on residential lots shall comply with the following specific standards: 1. Minimum protective slopes around a dwelling. Grading of pervious areas for a minimum distance of eight (8) feet away from any building shall slope perpendicularly away from the building toward areas designated to accept runoff. The minimum slope in this area shall be twelve (12) feet horizontal to one (1) foot vertical (12:1) (net differential in grade sixty-seven hundredths (0.67) feet) as stated in the BOCA International Building Code. Lesser slopes may be approved in specific cases where application of these requirements is not feasible and where an alternative method of foundation protection is provided to the satisfaction of the Department of Land Use. Where restricted by a property line, the distance may be shortened to the minimum side yard provided in Chapter 40. 2. Maximum protective slopes around a dwelling. In grading of pervious areas for a minimum of four (4) feet from the foundation of any building the slope shall not be steeper than four (4) feet horizontal to one (1) foot vertical (4:1). The maximum man-made slope at any place on a residential lot shall not be steeper than two (2) feet horizontal to one (1) foot vertical (2:1), and any man-made slope steeper than three (3) feet horizontal to one (1) foot vertical (3:1) shall be designed according to the applicable provisions of the Delaware Erosion and Sediment Control Handbook, to ensure slope stability and minimize maintenance requirements