Liberte Environmental Associates

TMDLs Potentially Affecting Water Quality

Provisional Final 2012 TMDL - Released by Oregon Department of Environmental Quality

Tualatin River Basin 2012 TMDL: Final Provisional TMDL Related Documents

This Provisional Final TMDL was issued, without as yet approval from EPA, as an order by Oregon DEQ in August 2012. This watershed is located in northwest Oregon.

Tualatin River Basin Watershed 2012 Provisional Final TMDL Order Memorandum (August 2012).

Tualatin River Basin Watershed 2012 Provisional Final TMDL - Executive Summary.

Tualatin River Basin Watershed 2012 Provisional Final TMDL - Chapter 1: Overview.

Tualatin River Basin Watershed 2012 Provisional Final TMDL - Chapter 2: Phosphorus.

Tualatin River Basin Watershed 2012 Provisional Final TMDL - Chapter 3: Ammonia.

Tualatin River Basin Watershed 2012 Provisional Final TMDL - Chapter 4: Water Quality Management Plan (WQMP).

Tualatin River Basin Watershed 2012 Provisional Final TMDL - DEQ Response to Comments (RTC) from Public.

Tualatin River Basin Watershed 2012 Provisional Final TMDL - Appendix 2A.

Tualatin River Basin Watershed 2012 Provisional Final TMDL - Appendix 2B.

Tualatin River Basin Watershed 2012 Provisional Final TMDL - Appendix 3A.

Tualatin River Basin Watershed 2012 Provisional Final TMDL - Fact Sheet.

DEQ Website for the Previous (2001) TMDL for the Tualatin River Basin

Links to Tualatin Basin NPDES Permits for sewage treatment plants (STP):
Forest Grove STP
Hillsboro STP
Rock Creek STP
Durham STP

DEQ originally provided the Final Tualatin Watershed TMDL in smaller size, separate appendices, as follows:
Separate Appendices
Appendix A* - Temperature Analysis
Appendix B - Bacteria Model
Appendix C - Chlorophyll and Phosphorus
Appendix D - Dissolved Oxygen Model (locked document)
Appendix E - pH
Appendix F - Fish
Appendix G - Toxics
Appendix H - Biological Criteria
Appendix I - Water Quality Management Plan (WQMP)

*LEA Disclaimer for compiled, unlocked and OCR documents: From time to time LEA will post on this website scanned documents, and additional documents otherwise limited in accessibility. Accordingly, LEA may use document unlocking and optical character recognition (OCR) capabilities to provide accessible, tagged text documents for use by people with visual impairments, and also provide searchable documents. The unlocking and OCR processes are not faultless, and hence LEA cannot guarantee document perfection. However, taking these caveats into account, document accessibility is greatly increased. LEA also posts the original document where necessary, as obtained by LEA, such that users may compare any potential imperfections in the unlocked and OCR documents.

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