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11. The site will provide an accessible path to all common areas as determined by the Building and Safety Division. 12. All existing wells on the site will be removed or sealed, filled and abandoned pursuant to Alameda County Ordinance 73 -68, prior to the start of grading operations unless Zone 7 retains specific wells for observation wells, or special approval is obtained from Zone 7 and the City Engineer for use of an existing well for landscape irrigation. If an existing well is retained for this purpose: a. Backflow devices to prevent the cross contamination will be provided. b. A certified Backflow Inspector will inspect the well and backflow devices annually and will submit a report the City Engineer for review and acceptance. 13. Prior to the start of grading, all existing septic tanks or holding tanks will be removed or sealed, filled, and abandoned, pursuant to the requirements of the Alameda County Department of Health Services. 14. The storm drain inlets will be clearly marked and maintained with the words "No Dumping — Drains to Bay." 15. Stormwater Design Requirements. The project will comply with the NPDES Permit applicable at the time of building permit issuance. The following requirements will be incorporated into the project, unless otherwise determined by the City Engineer: a. A final grading and drainage plan prepared by a licensed civil engineer depicting all final grades and on -site drainage control measures including bioswales will be submitted. Irrigated bioswales will be designed to optimize the amount of the stormwater running off the paved surface that enters the bioswale at its most upstream end. This plan will be subject to the review and approval of the City Engineer prior to the issuance of any building permits. b. In addition to natural controls, structural control, such as an oil /water separator, sand filter, may be required to intercept and pretreat stormwater prior to reaching the storm drain. c. Information related to the sizing of treatment areas and other treatment controls will be required. d. Landscaping will be designed to minimize irrigation and runoff, promote surface infiltration where appropriate, and minimize the use of fertilizers and pesticides that can contribute to stormwater pollution. e. Structures will be designed to discourage the occurrence and entry of pests into buildings, thus minimizing the need for pesticides. Conditions of Approval /PUD -80 Page 22 of 25