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11. The above required studies, designs and improvements can be deferred upon execution of a recorded agreement with the County of San Joaquin which provides for completion of all improvements prior to issuance of any non-agricultural building permit for any of the lots. A fee for processing the agreement will be required. (Development Title Section 9-1100.30]) Informational Notes: (i) At the time of development of each parcel, drainage from the improved portion of each parcel shall be retained on-site by a retention basin. A soils report to evaluate whether adequate percolation is available shall be submitted and approved for each parcel prior to development of any of the parcels. Hydrologic and hydraulic analyses shall be provided and demonstrate that all property, both downstream and upstream of the discharge, will not be subject to a higher flood level as a result of the proposed drainage. (Development Title Section 9-1135.2) (ii) Any construction activity that results in the disturbance of at least one (1) acre of soil shall require a State NPDES construction permit. Dischargers whose projects disturb 1 or more acres of soil or whose projects disturb less than 1 acre of soil and is not part of a larger plan of development, are required to obtain coverage under the current General Permit for Discharges of Storm Water Associated with Construction Activity (www.swrcb.ca.gov/stormwtr/gen_const.htmWconst_permit). Construction activity subject to this permit includes clearing, grading and disturbances to the ground such as stockpiling, or excavation, but does not include regular maintenance activities performed to restore the original line, grade, or capacity of the facility. (iii) This property is subject to the requirements of San Joaquin County Mosquito &Vector Control District(209-982-4675) and the California Health and Safety Code for the prevention of mosquitoes. Best Management Practices (BMP) guidelines for stormwater devices, ponds and `. wetlands are available. (iv) All future building permits for projects located within a Special Flood Hazard Area at the time of permit issuance shall meet the San Joaquin County flood hazard reduction requirements (Title 9, Chapter 9-1605) and all requirements of the State of California(CCR Title 23)that are in force at the time of permit issuance. As an example, these requirements may include raising the finish floor elevation one foot above the expected flood level and/or using flood resistant materials. 4. ENVIRONMENTAL HEALTH DEPARTMENT (Staff contact: Michael F. Escotto, (209)468-3443) a. A qualified environmental professional shall prepare a surface and subsurface contamination report, identifying any potential source of surface or subsurface contamination caused by past or current land uses. The report shall include evaluation of non-point source of hazardous materials, including agricultural chemical residues, as well as potential point sources, such as fuel storage tanks, septic systems, or chemical storage areas. The report shall be submitted to the Environmental Health Department at time of submittal of a tentative map (San Joaquin County Development Title, Section 9-905.12). A review fee of$250 shall be paid at the time of submittal to the Environmental Health Department. NOTE: The Environmental Health Department has received a report dated September 18, 2012, and it has been approved. San Joaquin County PA-1200230\Quartaroli & Associates, Inc Community Development Page 10