Attachment A

Examples of “Substantive Effect” on Seaside Basin

Referenced in Addendum No. 2, Paragraph 3(a)

The MPWMD will assert its management authority whenever a finding, supported by evidence, can be made that a proposed activity would result in a substantive physical effect to the Seaside Basin. A “substantive physical effect” includes any of the following actions within the Seaside Basin that can be shown to have a measurable effect:

Ø groundwater extraction of any quantity from the Seaside Basin;

Ø subsurface recharge and storage of any quantity of water into the Seaside Basin, regardless of water source (for example, injection well);

Ø artificial surface recharge (percolation) of any water into the Basin, regardless of source or level of treatment;

Ø blending of waters from different sources within the groundwater basin that could lead to adverse chemical reactions and degraded water quality in the Seaside Basin; does not include blending of waters above-ground as part of a water treatment and delivery system;

Ø disposal of any discharge, brine, chemical or other substance in such a way that could adversely affect the water quality of the Seaside Basin;

Ø runoff from a project in quantities such that a significant adverse impact on the Seaside Basin could occur, including contamination of the Seaside Basin; does not include situations where standard acceptable construction practices or best management operational practices are carried out pursuant to permit conditions placed on a project by the permitting jurisdiction;

Ø any action where a finding can be made, based on evidence, that would lead to a measurable effect on the water quality or volume of water-bearing formations within the Seaside Basin;

Ø any situation where a finding can be made, based on evidence, that a significant adverse impact to the health and hydrologic performance of the Seaside Basin may occur, either from an individual project or cumulatively.

Prepared 6/3/03