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~; 2. A soil/geotechnical investigation report shall be provided for the project. The report shall certify that dwelling units for Lot Nos. 16 through 20 will be affected in the event that the 54-inch diameter underground storm drainage system is unearthed and removed or replaced. In addition, an "Indemnification Hold/Harmless" release shall be provided to the Flood Control District. (Not applicable. Superseded per current plans) note iu parenthesis is for clarification. 3. No structural loads shall be allowed to be placed on the District's underground 54-inch diameter underground storm drainage system . 4. Full disclosures to future owners of Lot Nos. 16 through 20 shall be made by the property owner that any permanent structure within the storm drain easement area shall not be allowed and that access shall be maintained for any future repairs and/or maintenance of the 54-inch diameter underground storm drainage system that traverses their property. Furthermore, any pre-development overland swale or ditch, if any, shall be maintained by the property owners, and that any post- development landscaping, parking areas, walkways, et cetera, shall be removed at the property owner's expense if any future construction, reconstruction or maintenance work by the Flood Control District is to be undertaken within the easement area. (Not applicable. Superseded per current plans) note in parenthesis is for clarification. 5. The property owner shall provide a bond to ensure that the 54-inch diameter underground storm drainage system is undamaged by the construction of dwelling units, proposed subdivision road, and other site development work activities near or within the Flood Control District's storm drain easement. A detailed and thorough per-construction and post-construction video inspection of the storm drainline shall be performed, at the expense of the property owner , to establish its structural condition before and after project construction. 6. Prior to issuance of any building permits on this site, a detailed grading and drainage plan with supporting calculations and a completed Drainage Review Checklist shall be submitted to the County of Alameda Development Services Department. The proposed curb elevations shall not be less than 1.25 feet above the hydraulic grade line, as shown in Figure 14 of the Hydrology and Hydraulics Criteria Sununary, and at no point shall the curb grade be below the energy grade line. 7. The applicant shall provide measures to prevent the discharge of contaminated materials into public drainage facilities. It shall be the responsibility of the applicant to comply with Federal, State, or local water quality standards and regulations. Agreement to Conditions PLN2004-00101 June 6, 2005 Page 27 of 29