OCWD Management Area
Figure 3-19: Groundwater Contamination Plume Locations
3.3.2 Coastal Gaps
In the coastal area of Orange County, the primary source of saline groundwater is seawater intrusion into the basin through permeable aquifer sediments underlying topographic lowlands or gaps between the erosional remnants or mesas of the Newport-Inglewood Uplift. The susceptible locations from north to south are the Alamitos, Sunset, Bolsa, and Talbert gaps as shown in Figure 3-20. Note that new wells added within the last five years are shown in Figure 3-20. Background information on these gaps is contained in the 2017 Alternative. Ongoing activities related to seawater intrusion protection is described in subsequent sections of this report.
BASIN 8-1 ALTERNATIVE 2022 UPDATE
Management Area Description 3-26
Appendix F - 106
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