17.16.090 Soils Report.
A. A preliminary soils report, based upon adequate test borings, shall be required for every subdivision requiring a final map, except that the report may be waived by the City Engineer when satisfied of existing knowledge of soils in the subdivision. For subdivisions requiring a parcel map, a preliminary soils report may be required if the City Engineer or Planning Commission determines that a soils problem or soils-related hazard may exist. The preliminary soils report may be divided into the following two (2) segments:
1. Soils Reconnaissance. The reconnaissance shall include but not be limited to a complete description of the site based on a field investigation as related to soils matters such as stability, erosion, settlement, feasibility of construction of the proposed improvements, descriptions of soils-related hazards and problems, and proposed methods of eliminating or reducing such hazards and problems. Two (2) copies of the soils reconnaissance shall be filed with the tentative map.
2. Detailed Soils Investigation and Report. The investigation and report shall include field investigation and laboratory tests with detailed information and recommendations relative to all aspects of grading, filling and other earthwork; foundation design; pavement design and subsurface drainage. The report shall also recommend any required corrective action for the purpose of preventing structural damages to the subdivision improvements and the structures to be constructed on the lots and, in addition, shall also recommend any special precautions required for erosion control and the prevention of sedimentation or damage to off-site property. If such preliminary soils report indicates the presence of critically expansive soils or other soils problems which, if not corrected, would lead to structural defects, then a soils investigation of each lot in the subdivision may be required for submittal to the City Engineer prior to approval of a final map or parcel map. Two (2) copies of the investigation and report shall be filed with the improvement plans.
B. A final soils report shall be required where a preliminary soils report was required, unless such final report is waived in writing by the City Engineer. The final soils report shall contain sufficient information to ensure compliance with all recommendations of the preliminary soils report and the specifications for the project. The final report shall also contain any new soils condition information which differs from that in the preliminary reports and any corrections, additions or modifications not showing on the approved plans. One copy of the report shall be filed with both the City Engineer and Building Inspector prior to preliminary acknowledgment of completion of the improvements.
C. When conditions warrant, a geologic investigation and report may also be required. (Ord. 1030 § 2(11), 2018; Ord. 584 § 1 (part), 1977)