(a) For all proposed development within a geologically similar area, field and laboratory tests must be performed on samples taken from representative locations within the development site to ascertain the existing geotechnical conditions.
(b) A slope stability analysis must be performed for each new structure to be erected within a geologically similar area. No structure may be erected where the slope stability factor of safety is less than 1.5.
(c) Except for items that are expressly waived by the director, the slope stability analysis data submitted must include the following:
(1) A description of the boring location(s).
(2) Drillers logs of borings delineating the stratigraphy of the soil and bedrock.
(3) The locations and methods used to determine groundwater conditions and elevations.
(4) A table of field and laboratory engineering tests including, but not limited to shear strength tests, atterberg limits, and shrink/swell tests.
(5) Calculations for the slope stability analysis, including the criteria and parameters used, indicating the slope and location of slip surfaces and corresponding factors of safety.
(d) All analyses, designs, tests, and calculations for new development within a geologically similar area must be certified by a registered professional engineer. A registered professional engineer must also certify that structural foundations for all new development are designed to meet the requirements of the building code and all other applicable codes. (Ord. Nos. 19455; 26000)