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12.0 Glossary

Subsidize: To assist by payment of a sum of money or by the granting of terms or favors that
reduce the need for monetary expenditures. Housing subsidies may take the forms of
mortgage interest deductions or tax credits from federal and/or State income taxes, sale or
lease at less than market value of land to be used for the construction of housing, payments
to supplement a minimum affordable rent, and the like.

Sustainable Yield: The average amount of water that can be pumped from an aquifer on an
annual basis without affecting its long-term capacity.

Substantial Adverse Effect: The loss or harm of a magnitude which, based on current
scientific data and knowledge, would (1) substantially diminish population numbers of a
species or distribution of a habitat type within the region or (2) eliminate the functions and
values of a biological resource in the region.

Substantial Adverse Change: Demolition, destruction, relocation, or alteration such that
the significance of an historical resource would be impaired (California Public Resources
Code, Section 5020.1[q]).

Sulfate: A salt of sulfuric acid. Many examples of sulfates are known, and many of these are
highly soluble in water.

Sulfur Dioxide (SO2): A strong smelling, colorless gas that is formed by the combustion of
fossil fuels. Power plants, which may use coal or oil high in sulfur content, can be major
sources of SO2. SO2 and other sulfur oxides contribute to the problem of acid deposition. SO2
is a criteria air pollutant.

Sulfur Oxides: Pungent, colorless gases (sulfates are solids) formed primarily by the
combustion of sulfur-containing fossil fuels, especially coal and oil. Considered major
air pollutants, sulfur oxides may impact human health and damage vegetation.

Sump: a pit, well, or the like in which water or other liquid is collected
(www.dictionary.com).

Surcharging: The placement of fill to a specified height above grade.

Surficial landslide: A landslide involving only top layers of earthen material.

Surficial unit/deposit: Deposits of loose sediment on the surface above underlying bedrock
and can include previously placed fill, topsoil, colluvium, alluvium, and landslide debris.

Sustainability: Community use of natural resources in a way that does not jeopardize the
ability of future generations to live and prosper.

Sustainable Development: Development that maintains or enhances economic opportunity
and community well-being while protecting and restoring the natural environment upon
which people and economies depend. Sustainable development meets the needs of the
present without compromising the ability of future generations to meet their own needs.

R:\Projects\PAS\CEN\000306\Draft EIR\12.0_Glossary-051017.docx 12-78 Centennial Project
Draft EIR