COMPLIANCE INFO_1991-2006 - Laserfiche WebLink

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. 3. Transportation, 4. Housing, and 7. Infrastructure: According to California Department of Finance estimates , Manteca had 12 ,792 housing units as of January 1 , 1987. Manteca could have as many as 18 ,117 dwelling units as a result of the sewer plant expansion. At buildout, approximately 78 percent of the total housing stock would be single-family units , while 22 percent would be multifamily units and mobile homes. The proposed project conforms to the General Plan for Manteca. There are provisions in that Plan that should adequately mitigate the adverse effects of the expected population increase on these parameters. 5. Business Activity: The increase in population is expected to result in an increase in business activity. Such an increase is usually considered beneficial and no mitigation measures are necessary. 10. Groundwater, and 11. Surface Waters: Buildout from sewer plant expansion could affect water resources in three ways. First, urbanization of an area affects the quantity and quality of stormwater runoff and pollutant levels of receiving waters. Storm runoff includes constituents such as heavy metals (e.g. , arsenic , lead and "zinc) , organics (e.g. , chlordane, DDE, and 2 ,4D) , oil and grease , and other suspended solids. The levels of any particular constituent will depend on the type of land use developed. Some constituents are more densely concentrated at industrial sites. The San Joaquin River receives natural runoff from the Manteca area along with discharge from the City's storm drainage facilities. The second way water resources could be affected is by the depletion of the groundwater that supplies the City of Manteca. Additional groundwater pumping and reduced recharge from increased urbanization would place greater demands on the aquifer underlying Manteca. The third way which buildout could affect water resources is by degrading the groundwater quality. The 1985 Water System Master Plan recognized that urbanization was increasing the levels of heavy metals in some areas of the city. Increased water demand, particularly if new wells are located in Lathrop or between Lathrop and Manteca, might encourage the increased intrusion of brackish water from the Delta channels to the west, exacerbating the existing saline intrusion into Lathrop's aquifer. Mitigation measures to protect the quality of both Manteca's and Lathrop's water supplies will be required as grant conditions. The General Plan policy document includes the following policies to mitigate the impacts of new development on water resources. VI.A. 1. The City shall prohibit the establishment of any new individual septic systems within the city limits , except as provided in Policy IV.B. 3. 13