WATER RESOURCES OF ORANGE COUNTY 99
addition to the natural leakage that occurred through the overlying confining beds.
Figure 43 shows the altitude and configuration of the piezometric surface of the lower zone in June 1962. The altitude and configuration do not differ materially from the altitude and configuration of the piezometric surface of the upper zone in May 1962 (See figure 5.) indicating that both zones are connected and are recharged in the same general area.
Chemical analyses of the waters from the two zones tend to support the conclusion that the two zones are interconnected. Figure 44 shows that there are no significant differences in the chemical quality of the waters in the two dolomite zones.
All available evidence indicates that, given sufficient time and pressure head differences, water will move from any part of the aquifer to any other part carrying with it any soluble, long-enduring pollutants it might contain. If heavy pumping creates a deep, permanent cone of depression in the lower zone and pollutants such as hard detergents are present in the upper zone, the pollutants will tend to migrate to the lower zone.
81030' 25' 20' 81015' 2840' Il lIl i EXPLANATION
051
Observation well 
SEMINOLE COUNTY Number indicotes height of
- --------------. water level, in feet above
ORANGE COUNTY 1 meon sea level.
- 46
461 Piezometric contour 44 Contour intervol / foot. ~P
5 '>
35' 
54 F 1 51 1
28 ORLAN ~ 50
48
Figure 43. Configuration and altitude of the piezometric surface in the lower
zone of the Floridan aquifer in the Orlando area.