OCWD Management Area
Table 11-3: Summary of BEA Exemption Projects
Average 5-Year Pumping (afy)
Max Production Above BPP (afy)
OCWD BEA Subsidy
BEA Exemption Approved
Project Name
Project Description
Remove nitrates, TDS, and VOCs Remove nitrates and TDS
Irvine Desalter
Exemption
2001
6,990
10,000
Tustin Desalter Tustin Nitrate Removal
Exemption
1998
2,240
3,500
Remove nitrates
Exemption
1998
170
1,000
Mesa Water Colored Water Removal IRWD Wells No. 21 and 22 Huntington Beach Well No. 9
Remove color
Exemption
2011
4,605
8,700
Remove nitrates
Exemption
2012
2,420
7,000
Partial exemption
Remove odor
2018
1,680 (3 yrs)
3,000
DEFINITION OF SIGNIFICANT AND UNREASONABLE DEGRADATION OF WATER QUALITY
Three elements must be considered when evaluating the impact of groundwater quality degradation with regard to SGMA undesirable results. The first element is considering the causal nexus between groundwater management activities and groundwater quality. For example, groundwater contamination due to improper handling of toxic materials impacts groundwater quality; however, this water quality degradation is not caused by groundwater management activities. The second element is the beneficial uses of the groundwater and water quality regulations, such as MCLs and other potable water quality requirements. The third element that must be considered is the volume of groundwater impacted by quality degradation. If small volumes are negatively affected that do not materially affect the overall use of the aquifer or basin for its existing beneficial uses, then this would not represent a
BASIN 8-1 ALTERNATIVE 2022 UPDATE
Sustainable Management: Water Quality 11-8
Appendix F - 174
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