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USCR Collaborative Process Documentation

Documentation and reports for the USCR Collaborative Process are updated regularly and uploaded to the project website library. If you would like to access a particular document, please click on the appropriate link below.

TMDL Task 3 – Chloride Source Identification/Reduction, Pollution Prevention and Public Outreach Plan

SCVSD, 2002. Santa Clarita Valley Joint Sewerage System Chloride Source Report. October 2002

SCVSD, 2005. Chloride Source Identification/Reduction, Pollution Prevention, and Public Outreach Plan. November 2005.

SCVSD, 2006. 2006 Chloride Source Identification/Reduction, Pollution Prevention, and Public Outreach Plan. November 2006.

SCVSD, 2007. 2007 Chloride Source Identification/Reduction, Pollution Prevention, and Public Outreach Plan. November 2007.

SCVSD, 2008. 2008 Chloride Source Identification/Reduction, Pollution Prevention, and Public Outreach Plan. November 2008.



TMDL Task 5 – Groundwater Surface Water Interaction Model Study

CH2M Hill, 2006. GSWI Draft Report Literature Review and Data Acquisition. Task 1A- Evaluate Existing Models, Literature, and Data Upper Santa Clara River Chloride TMDL Collaborative Process. March 2006.

CH2M Hill, 2006. Technical Memorandum: Data Availability at the Proposed Western Calibration Boundary of the Groundwater/Surface-water Interaction (GSWI) Model. September 2006.

CH2M Hill, 2006. GSWI Final Report Task 2A--Conceptual Model Development East and Piru Subbasins Upper Santa Clara River Chloride TMDL Collaborative Process. October 2006.

CH2M Hill, 2006. Technical Memorandum: Orthogonal Curvilinear Grid Coordinate System of MODHMS. September 2006.

CH2M Hill, 2007. Technical Memorandum: Response to the Regional Board’s Concerns with Downstream Numerical Boundary Condition in GSWIM. April 2007

CH2M Hill, 2007. Draft Report: GSWI Task 3 - Public Review Strategy for the Groundwater/Surface-water Interaction Model Upper Santa Clara River Chloride TMDL Collaborative Process. February 2007.

CH2M Hill, 2007. Memorandum Response to GSWI TWG, TAP, and Stakeholder Comments Draft Technical Memorandum Task 2B – Numerical Model Development Approach for Projecting Water Demands and Supplies in the East Subbasin. August 2007

CH2M Hill, 2007. Task 2B – Numerical Model Development Approach for Projecting Water Demands and Supplies in the East Subbasin Upper Santa Clara River Chloride TMDL Collaborative Process. July 2007.

CH2M Hill, 2007. Task 2B – Numerical Model Development Approach for Projecting Water Demands and Supplies in the Piru Subbasin Upper Santa Clara River Chloride TMDL Collaborative Process. September 2007.

CH2M Hill, 2008. Draft Report: Task 2B-1 – Numerical Model Development and Scenario Results, East and Piru Subbasins. February 2008.

Geomatrix Consultants, 2006. Memorandum Exploratory Soil Borings in the Vicinity of Blue Cut. December 2006.

Geomatrix Consultants, 2006. Memorandum Groundwater and Surface Water Sampling Plan. October 2006.

Geomatrix Consultants, 2007. Draft Memorandum Surface Geophysics Program in the Vicinity of Blue Cut. June 2007.

Geomatrix Consultants, 2007. Draft Memorandum Proposed Monitoring Wells in the Vicinity of Blue Cut. June 2007.

Geomatrix Consultants, 2007. Memorandum Monitoring Wells in the Vicinity of Blue Cut. August 2007.

Geomatrix Consultants, 2008. Draft Supplement to Task 2B-1--Numerical Model Development and Scenario Results, East and Piru Subbasins Upper Santa Clara River Chloride TMDL Collaborative Process. February 2008.

Geomatrix Consultants, 2008. Draft Task 2B-2--Assessment of Alternatives for Compliance Options Using the Groundwater/Surface Water Interaction Model Upper Santa Clara River Chloride TMDL Collaborative Process. June 2008.

Geomatrix Consultants, 2008. Memorandum Response to Concerns Regarding Predicted Shallow Groundwater Concentrations in USCR Reach 4B. June 2008.



TMDL Task 6 – Agricultural (AG) Chloride Threshold Study and Threatened and Endangered Species (TES) Chloride Threshold Study

AG Study

CH2M Hill, 2005. Final Report: Literature Evaluation and Recommendations, Upper Santa Clara River Chloride TMDL Collaborative Process. September 2005. CH2M Hill, 2006.

Final Report: Phase I Extended Study Alternatives Upper Santa Clara River Chloride TMDL Collaborative Process. April 2006.

Newfields Agricultural and Environmental Resources, 2007. Draft Technical Memorandum Comment Change Report for the Draft Technical Memorandum Compliance Averaging Period for Chloride Threshold Guidelines in Avocado. December 2007.

Newfields Agricultural and Environmental Resources, 2007. Technical Memorandum: Compliance Averaging Period for Chloride Threshold Guidelines in Avocado. December 2007.

Newfields Agricultural and Environmental Resources, 2008. Technical Memorandum Comment Change Report for the Draft Technical Memorandum Compliance Averaging Period for Chloride Threshold Guidelines in Avocado. June 2008.

Agricultural Chloride Threshold Study Technical Advisory Panel, 2008. Memorandum Final Comments by the Co-Chairs of the Agricultural Chloride Threshold Study Technical Advisory Panel on the Technical Memorandum Compliance Averaging Period for Chloride Threshold Guidelines in Avocado. February 8, 2008.



TES Study

Advent-Environ, 2004. Chloride Threshold Recommendations for the Protection of Aquatic Life in the Upper Santa Clara River. September 2004.

Advent-Environ, 2007. Evaluation of Chloride Water Quality Criteria Protectiveness of Upper Santa Clara River Aquatic Life: An Emphasis on Threatened and Endangered Species. May 2007.

Advent-Environ, 2007. Executive Summary and Addendum to Evaluation of Chloride Water Quality Criteria Protectiveness of Upper Santa Clara River Threatened and Endangered Species. November 2007.

Advent-Environ, 2008. Protective Sulfate Aquatic Life Thresholds for Threatened and Endangered Species of the Santa Clara River, California. September 2008.

Memorandum: Upper Santa Clara River Threatened and Endangered Species Chloride Threshold Study Technical Advisory Panel Meeting Summary

Upper Santa Clara River Chloride TMDL Collaborative Process. Threatened and Endangered Species (TES) Study. Technical Advisory Panel Critical Review of the Aquatic Life Report. November 2007.



TMDL Task 7 and 8 – Site Specific Objectives Study and Anti-Degradation Analysis

Larry Walker Associates, 2008. Draft Report Addendum: Reach 4A Antidegradation Analysis Considerations. September 2008.

Larry Walker Associates, 2008. Draft Task 7 and 8 Report Site Specific Objective and Anti-Degradation Analysis. July 2008.

Santa Clarita Valley Sanitation District, 2007. White Paper No. 1 Boundary Re-designation Considerations Santa Clara River – Reaches 4 and 5. July 2007.

Santa Clarita Valley Sanitation District, 2007. vWhite Paper No. 2B Regulatory Considerations for Beneficial Uses Santa Clara River--Reaches 5 and 6. October 2007.

Santa Clarita Valley Sanitation District, 2007. White Paper No. 2A Agricultural Beneficial Use Considerations for Santa Clara River – Reaches 5 and 6. September 2007.



TMDL Task 9, 10b, and 10c – Conceptual Compliance Measures

Bachman, Steven and Norm Brown, 2008. Technical Memorandum: Alternative Water Resources Management Santa Clara River Chloride TMDL Task 2: Piru Groundwater Extraction Wells. January 2008.

Kennedy/Jenks Consultants, 2008. Technical Memorandum Upper Santa Clara River Alternative Water Resources Management. January, 2008.

Geomatrix Consultants, 2008. Draft Task 2B-2--Assessment of Alternatives for Compliance Options Using the Groundwater/Surface Water Interaction Model Upper Santa Clara River Chloride TMDL Collaborative Process. June 2008.

United Water Conservation District, 2008. Final Draft Alternative Water Resources Management Program Effects in Ventura County. June 2008.

Santa Clarita Valley Sanitation District, 2008. MOU Exhibit 1--Alternate Water Resources Management Program Overview. August 2008.

Santa Clarita Valley Sanitation District, 2008. Memorandum of Understanding for Implementation of An Alternative Water Resources Management Program. October 2008.

Santa Clarita Valley Sanitation District, 2008. USCR Cl TMDL - SCR Reaches 5 & 6 Cost Estimate Summary for Conceptual Compliance Alternatives Geomatrix Consultants, 2008.

Draft Responses to GSWI TWG and Stakeholder Comments Draft Task 2B-2 Report – Assessment of Alternatives for Compliance Options Using the Groundwater Surface Water Interaction Model. August 2008.