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C. Municipal Regional Stormwater Permit Provision C.3 (Clean Water Program) Because the project creates or replaces more than 10,000 SF of impervious surface, it is considered a Regulated Project according to Provision C.3.b of the San Francisco Bay Region Municipal Regional Stormwater NPDES Permit (Order No. R2-2015- 0049, NPDES Permit No. CAS612008, adopted 11/19/2015). The project also discharges stormwater to San Leandro Creek, an unimproved natural channel, and therefore is subject to hydrograph modification in accordance with section C.3.g of the MRP. Regulated projects must treat stormwater runoff before releasing to the public storm drainage system. An executed Operations & Maintenance agreement per MRP section C.3.h will be required prior to Grading Permit issuance. Refer to the Alameda County Clean Water Program's C.3 Technical Guidance for more information. 2. The Applicant shall be required to demonstrate the adequacy of the existing storm drain system to handle existing run-off from the drainage basin as well as run-off from the project, upgrade the storm drain system to handle existing run-off from the drainage basin as well as run-off from the project, or meter run-off from the site so that it leaves the site at the same rate as it currently does. The applicant shall reduce storm water pollution by implementing the following pollution source control measures: a) Structures shall be designed to discourage the occurrence and entry of pests into buildings, thus minimizing the need for pesticides. The trash area shall be separated from the rest of the building by concrete or masonry walls so that pests that gain access to the area are less likely to access the rest of the building. b) Sidewalks and parking lots shall be swept regularly to minimize the accumulation of litter and debris. Steam cleaning or low volume pressure washing may be performed only after pre -cleaning using dry methods, spot cleaning and recovery in stained areas and removal of all mobile pollutants. Debris resulting from pressure washing shall be trapped and collected to prevent entry into the storm drain system. Wash water containing any soap, cleaning agent or degreaser shall not be discharged to the storm drain. c) Interior floor drains (if any) shall not be connected to the storm drain system. d) Air conditioning condensate shall be directed to landscaped areas. Any air conditioning condensate that discharges to land without flowing to a storm drain may be subject to the requirements of the State Water Resources Control Board's (SWRCB) Statewide General Waste Discharge Requirements (WDRs) for Discharges to Land with a Low Threat to Water Quality. e) Landscaping shall be designed to minimize irrigation and runoff, promote surface infiltration where appropriate, and minimize the use of fertilizers and pesticides that can contribute to storm water pollution. f) Where feasible, landscaping shall be designed and operated to treat storm water runoff by incorporating elements that collect, detain, and infiltrate runoff. In areas that provide detention of water, plans that are tolerant of saturated soil conditions and prolonged exposure to water shall be specified. g) Plant materials selected shall be appropriate to site specific characteristics such as soil type, topography, climate, amount and timing of sunlight, prevailing winds, Agreement to Conditions July 17, 2017 PLN 16-0067 Page 7 of 15