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12.0 Glossary

Re-Refined Oil: Re-refined oil is recycled oil product (CIWMB 2006).

Reactive Organic Compound (ROC)/Reactive Organic Gases (ROG): A photochemically
reactive chemical gas, composed of non-methane hydrocarbons, which may contribute to
the formation of smog. Also sometimes referred to as Non-Methane Organic Gases (NMOGs).

Recharge: The physical process where water naturally percolates or sinks into a
groundwater basin.

Recharge Basin: A surface facility, often a large pond, used to increase the infiltration of
surface water into a groundwater basin.

Reclamation: The reuse of resources, usually those present in solid wastes or sewage.

Recompaction: The reconsolidation of disturbed earth.

Recreation, Active: A type of recreation or activity that requires the use of organized play
areas including, but not limited to, softball, baseball, football and soccer fields, tennis and
basketball courts, and various forms of children's play equipment.

Recreation, Passive: Type of recreation or activity that does not require the use of
organized play areas.

Recycle: Per Section 40180 of the California Public Resources Code, the process of collecting,
sorting, cleansing, treating, and reconstituting materials that would otherwise become solid
waste, and returning them to the economic mainstream in the form of raw material for new,
reused, or reconstituted products that meet the quality standards necessary to be used in
the marketplace.

Regional: Pertaining to activities or economies at a scale greater than that of a single
jurisdiction, and affecting a broad geographic area.

Regional Housing Needs Assessment (RHNA): The Regional Housing Needs Assessment
(RHNA) is based on State projections of population growth and housing unit demand and
assigns a share of the region’s future housing need to each jurisdiction within the SCAG
region. These housing need numbers serve as the basis for the update of each California city
and county Housing Element.

Regional Park: A park typically 150–500 acres in size focusing on activities and natural
features not included in most other types of parks and often based on a specific scenic or
recreational opportunity.

Regional Transportation Plan (RTP): The RTP is created by the Metropolitan Planning
Organization (MPO) or the regional planning commission.

Registered Environmental Assessor: The Registered Environmental Assessor (REA)
Program, under the jurisdiction of the California Department of Toxic Substances Control,
registers environmental compliance experts on a voluntary basis. Each registrant listed in

R:\Projects\PAS\CEN\000306\Draft EIR\12.0_Glossary-051017.docx 12-66 Centennial Project
Draft EIR