A. A geologic report shall include maps and a report containing at a minimum the following information:
1. The maps shall include:
a. The site location and regional setting of the subject property.
b. A site specific geologic map, which illustrates exposure to geological and natural hazards, geotechnical limitations as identified in section 17.70.030 of this chapter. The map shall illustrate the proposed site modifications relative to geological and natural hazards and/or geotechnical limitations that may impact the site. Any corrective site modification actions necessary to mitigate or avoid hazards or limitations shall clearly be identified on the map.
c. Maps shall use a scale of one inch equaling one hundred feet (1" = 100'), with contour lines at five foot (5') intervals. Existing contours shall be shown by dashed lines; proposed contours shall be shown as solid lines. Boring logs, cross sections, and test trench logs, soil sample descriptions and test results shall be included.
d. The city engineer may require additional maps or additional detail on existing maps as reasonably necessary to evaluate actual or potential geologic hazards.
2. The report shall include:
a. A description of the proposed grading, filling, excavation or structure;
b. An analysis of the effects of the proposed grading, filling, excavation or erection of a structure in relation to the geologic conditions shown in the geologic maps;
c. With regard to a structure, an analysis of the manner in which the same, as constructed, will be made reasonably safe for human habitation;
d. A California bearing ratio (CBR) value when roads are being constructed and a soil bearing capacity where structures are being erected;
e. Any corrective or remedial action necessary to avoid a violation of section 17.70.020 of this chapter, shall be described and analyzed in detail;
f. A list, including title, author and date, of all prior studies or reports which are relied upon to make this report;
g. The city engineer may require additional information or analyses, which are reasonably necessary to evaluate actual or potential geologic hazards. This includes submittal of geologic reports to the state geologist for review and comment.
B. In the case of a proposal to grade, fill or excavate, which is not directly or indirectly related to a proposal to erect a structure for human habitation, the city engineer may waive compliance with any requirement of this section not relevant to the proposed grading, filling or excavating. (Ord. 12-07)