For grading lots abutting streets having a slope of one percent (1%) or less:
A. Such lots shall have drainage gradients not exceeding 1.25 percent, nor shall the drainage gradient be less than one percent (1%) in all areas;
B. The slope of the finish grades adjacent to a dwelling or structure may differ from these specified gradients if the soils engineer determines that the specified one percent (1%) to 1.25 percent gradients are not adequate for proper drainage, or, if in the opinion of the building official, steeper grades are necessary to provide drainage from the building foundations;
C. The lot may drain to the street at any location of the lot frontage. (Prior code § 86102)