2039 N Victoria Drive #2 - Plan - Laserfiche WebLink

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24-8009 Page 12 Site Development Recommendations General During earthwork construction, all site preparation and the general procedures of the contractor should be observed, and the fill selectively tested by a representative of TGR. If unusual or unexpected conditions are exposed in the field, they should be reviewed by this office and if warranted, modified and/or additional recommendations will be offered. Grading All grading should conform to the guidelines presented in the California Building Code (2022 edition), except where specifically superseded in the text of this report. Prior to grading, TGR’s representative should be present at the pre-construction meeting to provide grading guidelines, if needed, and review any earthwork. The upper 2 to approximately 10 feet of soils within the area of the proposed ADU are undocumented fill. Undocumented fill is considered unsuitable for the support of engineered fill and/or structures and shall be removed. Undocumented fill related to the previously demolished pool is anticipated under the proposed building pad and shown on Plate 1. Deeper removals may be required where excavation bottoms expose unsuitable soils. Removals shall be a minimum of 3 feet below the bottom for footings or bottom of the old pool (varies, up to 10 feet or greater), whichever is deeper. Site soils may be reused as engineered fill provided they are free of oversized particles and the recommendations presented in this report are implemented. Exposed bottoms should be scarified a minimum of 6-inches, moisture conditioned to optimum moisture and compacted to a minimum ninety (90) percent relative compaction. Subsequently, site fill soils should be re- compacted to a minimum of ninety (90) percent relative compaction at optimum moisture content. The lateral extent of removals beyond the building/structure/footing limits should be equal to at least 7 feet. The depth of over-excavation should be reviewed by the Geotechnical Consultant during the actual construction. Any subsurface obstruction buried structural elements, and unsuitable material encountered during grading, should be immediately brought to the attention of the Geotechnical Consultant for proper exposure, removal and processing, as recommended. Fill Placement Prior to any fill placement TGR should observe the exposed surface soils. The site soils may be re-used as engineered fill provided they are free of organic content and particle size greater than 4-inches. All particles greater than 4-inches shall be removed and disposed offsite. Fill shall be moisture-conditioned to optimum moisture content and compacted to a minimum relative compaction of 90 percent in accordance with ASTM D1557. Any import soils shall be non-expansive and approved by TGR Geotechnical Inc. 2039 N Victoria Drive #24/28/2025