Soils reports shall be provided as follows:

(1) Preliminary Soil Report. Prior to the submission of a final map for advisory agency approval, the subdivider shall file a preliminary soil report with the department of public works. The report shall be prepared by a civil engineer who is registered by the state, based upon adequate test boring or excavations, in the subdivision. The preliminary soil report may be waived if the department of public works shall determine that, due to the knowledge of such department as to the soil qualities of the subdivision, no preliminary analysis is necessary. The determination shall be in writing and be made part of the data accompanying the final map.

(2) Soil Investigation. If the preliminary soil report indicates the presence of critically expansive soils or other soil problem which, if not corrected, would lead to structural defects, a soil investigation of each lot in the subdivision shall be prepared by a civil engineer who is registered by the state. The soil investigation shall recommend corrective action which is likely to prevent structural damage to each dwelling proposed to be constructed on the expansive soil. The report shall be filed with the department of public works.

(3) Approval of Soil Investigations. The department of public works shall approve the soil investigation if it determines that the recommended corrective action is likely to prevent structural damage to each dwelling to be constructed on each lot in the subdivision. Appeal from such determination shall be to the city council. Subsequent building permits shall be conditioned upon the incorporation of the approved recommended corrective action in the construction of each dwelling. (Ord. No. 1305, (part).)