COMPLIANCE INFO_1991-2006 - Laserfiche WebLink

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urban activity wiakFesult in incremental incAlkases in air pollutant emissiorWin the Manteca area. ThdiMcremental ambient air quality impacts of such emission increases cannot be reliably estimated for regional pollutants such as ozone (the major component of photochemical smog) . It is , however, practical to estimate the incremental change in carbon monoxide concentrations associated with traffic from urban development. No violations of either the state or federal carbon monoxide standards are expected in Manteca under either existing or future traffic conditions. Sewer plant expansion facilitates conversion of land currently in agricultural use to urban uses. Approximately 1 ,311 acres are expected to be ultimately converted by this expansion. The total loss of agricultural land around Manteca is a relatively small portion of the total agricultural land in San Joaquin County ( i.e. , less than one percent) . However, the loss resulting from the urbanization of the Manteca area contributes cumulatively to the overall significant loss of farmland in the county. Agricultural conversion could also require the nonrenewal or cancellation of Williamson Act land conservation contracts. Approximately 700 -acres of prime agricultural lands within the primary urban area, as defined by the City of Manteca General Plan, are under Williamson Act land conservation contracts. Conversion of agricultural land and Williamson Act land in particular could also have the cumulative secondary impact of encouraging conversion of Williamson Act land outside the primary urban area. Altered land use patterns and land use conflicts from urban encroachment contribute to the conversion of agricultural land. To the extent that development impacts riparian vegetation or other habitat which may be used by threatened or endangered species which have previously been mentioned, these species may be impacted. To the extent that development impacts riparian vegetation and converts agricultural land to urban uses , habitat used by Pacific Flyway waterfowl populations will be impacted. Grant conditions pertaining to riparian vegetation and agricultural land will be added to the grant. 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 , organics , oil and grease, and other suspended solids. 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. 5