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The soils at the building site are analyzed and protected as specified in this section.
A4.106.2.1 Soil Analysis
Soil analysis is performed by a licensed design professional and the findings utilized in the structural design of the building.
A4.106.2.2 Soil Protection
The effect of development on building sites is evaluated and the soil is protected by one or more of the following:
  1. Natural drainage patterns are evaluated and erosion controls are implemented to minimize erosion during construction and after occupancy.
  2. Site access is accomplished by minimizing the amount of cut and fill needed to install access roads and driveways.
  3. As allowed by other parts of the California Building Standards Code underground construction activities are coordinated to utilize the same trench, minimize the amount of time the disturbed soil is exposed and the soil is replaced using accepted compaction methods.
A4.106.2.3 Topsoil Protection
Topsoil shall be protected or saved for reuse as specified in this section.
  • Tier 1. Displaced topsoil shall be stockpiled for reuse in a designated area and covered or protected from erosion.
    Note: Protection from erosion includes covering with tarps, straw, mulch, chipped wood, vegetative cover or other means acceptable to the enforcing agency to protect the topsoil for later use.
  • Tier 2. The construction area shall be identified and delineated by fencing or flagging to limit construction activity to the construction area. Heavy equipment or vehicle traffic and material storage outside the construction area shall be limited to areas that are planned to be paved.

Related Code Sections

A4.106.2.2 Residential Voluntary Measures, Soil Protection
The effect of development on building sites is evaluated and the soil is protected by one or more of the following: Natural drainage patterns ...