Env Planning Review
Review No:2
 Employee Record is no longer valid + employeeid = HHEANEY, ALUS DESCRIPTION := ENVIRONMENTAL PLANNING Employee Init = MJC 1. The soils report (Redwood Geotechnical, dated 7/07) provided has been submitted for formal review. NOTE: Additional comments may be forthcoming upon completion of the soils report. 2. A detailed grading and drainage plan is required. Please include in plan view the following information: A. Show existing and proposed contours. B. Provide earthwork quantities for cut/fill and any overexcavation/recompaction proposed. IMPORTANT NOTE: The parcel lies within a mapped floodplain and is subject to the following County Code: 16.20.080 (iv) 5: "An application for a grading approval to place fill within a 100-year floodplain shall be denied, unless the fill is a minimum amount necessary, not to exceed 50 cubic yards, and it can be demonstrated through Environmental Review that the fill will not cause significant cumulative impacts". 3. The crawlspace shown in "Section 1" on "Sheet S0.0" would require venti ng. The concern here is that floodwaters would enter through the venting and inundate the crawlspace. Groundwater conditions at the site is another concern since the plan shows the foundation extending down over four feet from existing grade. The crawlspace could be inundated with water just from high groundwater conditions throughout the year. 4. As currently shown, the FEMA requirement that the highest horizontal structural member (joist or beam) which provides support directly to the lowest floor is elevated at least one foot above the 100-year flood level has been completed. 11/27/07 - Additional Comments 5. The soils report has not been accepted. Please see letter dated 11/27/07 and comments #6-#12. 6. The soils report states that fill exists in the vicinity of the house foudnations, but does not identify the depth or extent of the fill placement. Please provide the depth of fill and lateral extent of fill placement at the perimeter of the building foundation to ensure the correct embedment of proposed foundations into native soils. 7. Please classify the subsurface soils according to UBC Standard 18-1, Soils Classification (See CBC 1803.1). 8. The soils report states that the clayey native soil has a moderate to high expansion potential; please determine the expansive characteristics of the soils in accordance with UBC Standard 18-2, Expansion Index Test (See CBC 1803.2). 9. Provide a Coefficient of Friction for the foundation design. 10. Provide recommendations for mitigation of high groundwater conditions in the vicinity of the proposed foundation and beneath the building. Note that the foundation cross-section shown in the report varies significantly from that included in the plans with respect to embedment depth. 11. Please perform a Consolidation Test to determine the potential settlement of the foundation. 12. Due to the presence of soft, expansive soils and high groundwater conditions, this site does not appear to be well-suited for a conventional foundation system. Please clarify how each of these site characteristics will be mitigated with respect to the proposed foundation design. Additional Plan Review Comments 13. As noted in Comment #3, groundwater conditions at the site must be mitigated such that water is precluded from collecting in the vicinity of the foundations and below the house. Please note that the entire subdrainage system must be shown, including any pumps necessary to transmit the water to a suitable discharge point. 14. After the soils report has been accepted and final plans have been prepared that are acceptable to all reviewing agencies, a geotechnical plan review letter shall be submitted to Environmental Planning. The author of the soils report shall write the plan review letter; the letter shall state that the project plans conform to the report recommendations and shall reference the plan sheets by both drawing and revision dates. Updated Comments 12/27/07: Comment 1 above: The soils report was submitted for review and there are additional issues to be addressed. Please review comments 5-14 and the letter sent to you by our department civil engineer dated 11/27/07. Item 2 above still needs to be addressed. You are proposing to place fill (up to 2.5 ft.) around the perimeter of the house. This does need to be identified on a grading and drainage plan. I understand there may be more grading proposed in the future, but I need to have a grading and drainage plan for this project. Please provide an estimate (cubic yards) of fill that will be required to complete this project. Show existing and proposed contours.
Review No:1
 , ALUS DESCRIPTION := ENVIRONMENTAL PLANNING Employee Init = MJC NO PROJECT REVIEW DESCRIPTION AVAILABLE