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The RIBs are made up of one
to five cells, each measuring approximately 350 feet long by 150 feet wide.
They are built over a natural sand ridge ranging in thickness from 30 to 200
feet. Beneath these surficial sands is a dense concentration of semi-permeable
clays known as the Hawthorn formation. The Hawthorn acts as a barrier
separating shallow groundwater flow within the surficial sands from deeper,
confined flow in the Floridan aquifer, which is comprised primarily of
fractured limestones and dolomites. |
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In this region of West Orange
and Southeast Lake Counties, shallow groundwater in the surficial sands
follows primarily lateral flow patterns above the Hawthorn until reaching areas
of low resistance that permit significant vertical flow downward into the
Floridan aquifer, thus replenishing our drinking water supply. Initially of
sufficient quality to meet most state and federal primary and secondary
drinking water standards, the reclaimed water continues to be polished as it
travels through the surficial sands and deeper limestones. |
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