Amendment to the Water Quality Control Plan for the San Diego Basin to Incorporate Site-Specific Water Effect Ratios into Water Quality Objectives for Toxic Pol

2 Documents in Project

Summary

SCH Number
2019100661
Lead Agency
Regional Water Quality Control Board, Region 9 - San Diego (California Regional Water Quality Control Board, San Diego Region 9)
Document Title
Amendment to the Water Quality Control Plan for the San Diego Basin to Incorporate Site-Specific Water Effect Ratios into Water Quality Objectives for Toxic Pol
Document Type
NDE - Notice of Decision
Received
Posted
3/11/2020

Document Description
The project is an amendment to the Water Quality Control Plan for the San Diego Basin (Basin Plan), including Total Maximum Daily Loads (TMDLs) for dissolved copper and dissolved zinc in Chollas Creek. The project/amendment consists of 1) an update to clarify the application of water effect ratios (WERs) in the California Toxics Rule (CTR) for developing site-specific water quality objectives (WQOs) (Chapter 3), 2) an update to apply site-specific WERs to dissolved copper and dissolved zinc in Chollas Creek during wet weather (Chapter 3), and 3) an update to revise WER values and associated water quality criteria calculations (Chapter 7). This project/amendment takes the site-specific conditions/WER into account to achieve the intended level of ecosystem protection without being overly conservative.

Contact Information
Melissa Corona
San Diego Regional Water Quality Control Board
2375 Northside Dr
San Diego, CA 92108

Phone : (619) 521-8039

Location

Counties
San Diego

Notice of Determination

Approving Agency
San Diego Regional Water Quality Control Board
Approving Agency Role
Lead Agency
Approved On
Final Environmental Document Available at
N/A

Determinations

(1) The project will have a significant impact on the environment
N/A
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
No
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
N/A
(4) A mitigation reporting or monitoring plan was adopted for this project
N/A
(5) A Statement of Overriding Considerations was adopted for this project
N/A
(6) Findings were made pursuant to the provisions of CEQA
N/A

Attachments

Environmental Document
Att 2_2017-02-08_San Diego Water Board Resolution   PDF 820 K Att 3_2019-09-17_State Water Board Resolution   PDF 162 K Att 4_2017-02-08_CEQA Checklist   PDF 367 K Att 6_2020-03-05_OAL Approval Letter   PDF 546 K
Notice of Determination
Att 1_2020-03-11_Notice of Decision   PDF 122 K Att 5_2019-12-11_CEQA Filing Fee No Effect Determination   PDF 372 K

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