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10 Concrete wash area 1) locate wash out area away from storm <br /> drains and open ditches, 2) construct a temporary pit large <br /> enough to store the liquid and solid waste, 3) clean the pit by <br /> allowing concrete to set, 4) break up the concrete, and then 5) <br /> recycle or dispose of properly <br /> 11 Equipment and vehicle maintenance area at the project site is not <br /> permitted, use an off-site repair shop <br /> b Within 30 days of the installation and testing of the stormwater treatment <br /> and hydromodification facilities, the designer of the site shall submit a letter <br /> to City Project Inspector/Construction Services Manager certifying the <br /> devices have been constructed in accordance with the approved plans for <br /> stormwater and C3 design for the project The letter shall request an <br /> inspection by City staff <br /> Operation and Maintenance Requirements <br /> 141 The project shall comply with the operation and maintenance requirements of the <br /> NPDES Permit All regulated projects (such as a residential subdivision projects) <br /> that create and/or replace 10,000 square feet or more of impervious areas shall <br /> enter into a recorded Stormwater Operation and Maintenance (O&M) Agreement <br /> for treating stormwater runoff from the site in perpetuity The agreement is <br /> required to be recorded at the Alameda County Recorder's Office in a format <br /> approved by the City <br /> a The Operation and Maintenance Agreement shall clarify that the property <br /> owner(s) of the site shall be responsible for the following in perpetuity <br /> i Maintaining all private stormwater treatment measures on the project <br /> i site <br /> n Annually submitting a maintenance report to the City Operations <br /> Services Department, Utilities Division, addressing the <br /> implementation of the Operation and Maintenance Agreement <br /> requirements <br /> The final Operation and Maintenance Agreement shall be submitted to the <br /> Engineering Division prior to the issuance of a grading or building permit, <br /> whichever comes first The Agreement is subject to review and approval of the <br /> City Engineer/City Attorney, prior to recordation <br /> 142 The Operation and Maintenance Agreement responsibilities shall include, but not <br /> be limited to the following <br /> P16-1201, P16-1202 & PUD-120, Catalyst Development City Council <br /> Page 29 of 30 <br /> I <br />