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ix. Equipment fueling area (Use of an off-site fueling station is strongly encouraged): use a designated area away from the storm drainage facility; use secondary containment and spill rags when fueling; discourage "topping off' of fuel tanks; place a stockpile of absorbent material where it will be readily accessible; check vehicles and equipment regularly for leaking oils and fuels; and dispose rags and absorbent materials promptly and properly. x. Concrete wash area: 1) locate wash out area away from storm drains and open ditches; 2) construct a temporary pit large enough to store the liquid and solid waste; 3) clean the pit by allowing concrete to set; 4) break up the concrete; and then 5) recycle or dispose of properly. xi. Equipment and vehicle maintenance area (Use of an off-site repair shop is strongly encouraged): use a designated area away from the storm drainage facility; always use secondary containment and keep stockpile of cleanup materials nearby; regularly inspect vehicles and equipment for leaks and repair quickly or remove them from project site; and train employees on spill cleanup procedures. d. Within 30 days of the installation and testing of the stormwater treatment and hydromodification facilities, the designer of the site shall submit a letter to City Project Inspector/Construction Services Manager certifying the devices have been constructed in accordance with the approved plans for stormwater and C3 design for the project, The letter shall request an inspection by City staff. Operation and Maintenance Requirements The project shall comply with the operation and maintenance requirements of the NPDES Permit. All regulated projects (such as a commercial development and residential subdivision) that create and/or replace 10,000 square feet or more of impervious areas shall enter into a recorded Stormwater Operation and Maintenance (O&M) Agreement for treating stormwater runoff from the site in perpetuity. The agreement is required to be recorded at the Alameda County Recorder's Office in a format approved by City. The Operation and Maintenance Agreement shall clarify that the property owner(s) of the site shall be responsible for the following in perpetuity: a. Maintaining all private stormwater treatment measures on the project site. b. Annually submitting a maintenance report to the City Operations Services Department, Utilities Division, addressing the implementation of the Operation and Maintenance Agreement requirements. The final Operation and Maintenance Agreement shall be submitted to the Engineering Division prior to the issuing grading or building permit, whichever PUD-85-02-02D-06M, Lexus of Pleasanton Page 23 of 24