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Portland Water Bureau

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GENERAL INFORMATION: 503-823-7404

1120 SW Fifth Ave, Suite 600, Portland, OR 97204

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Documents & Correspondence

This page contains documents and correspondence regarding compliance with the Long Term 2 Enhanced Surface Water Treatment rule (LT2). Most documents are correspondence between the federal Environmental Protection Agency (EPA) and the Portland Water Bureau (PWB). Future documents and correspondence will be added.

Compliance with the Treatment Requirements of LT2

Portland's Bull Run Treatment Variance

Portland's Bull Run Treatment Variance Monthly Cryptosporidium Monitoring Results

Sampling Plan and Study

City Council Hearing Materials & Resolutions

Compliance with the Open Finished Reservoir Requirements of LT2 


Compliance with the Treatment Requirements of LT2

Bull Run Treatment Citizens Panel Report to City Council
September, 2002

EPA Letter to Portland Water Bureau Approving LT2 Grandfathered Data
July 2, 2007

EPA Letter to Portland Water Bureau Regarding Portland's Attempt to Seek a Variance to LT2
January 23, 2008

EPA Letter to Portland Summarizing and Clarifying Questions from February 20, 2008 Meeting
April 8, 2008

Portland Water Bureau Submission to EPA Regarding Arithmetic Mean of Cryptosporidium in Source Water
February 5, 2009

Information Update
May 15, 2009

Portland Water Bureau Letter to EPA requesting meeting on possible variance conditions
September 9, 2010

EPA Letter to Portland Water Bureau in Response to Meeting Request
October 22, 2010

Portland Water Bureau letter to State of Oregon regarding deadline for completion of UV facility
February 2, 2011

Letter from Portland Water Bureau to EPA Region 10 regarding State and EPA roles in reviewing variance request
February 15, 2011

State approval of two-year extension of LT2 treatment compliance deadline to April 1, 2014
March 10, 2011

Response from EPA to Portland Water Bureau letter regarding primacy and variance review process
March 21, 2011

Oregon Health Authority-Intent to Grant Variance
November 29, 2011

Portland Water Bureau Comments on Oregon Health Authority's Notice of Intent to Grant a Variance
January 3, 2012

Interim Sampling Detection Letter to OHA
January 4, 2012

Interim Sampling Detection Letter to OHA
January 9, 2012

Interim Sampling Report to OHA
January 23, 2012

PWB Comments Regarding Recent Cryptosporidium Testing Results
February 8, 2012

Preliminary Results of Side-by-Side Comparison of Cryptosporidium Recovery from Bull Run Raw Water Using EPA Method 1623, Method 1623.1, and the ASI/PWB Precoat Method
December 28, 2012

Portland Water Bureau LT2 Rule Six-Year Review Comment Submittal
December 28, 2012

Portland's Bull Run Treatment Variance

Final Order Issued by OHA Granting Portland's Treatment Variance 
March 14, 2012

Portland Water Bureau's proposed Watershed Inspection and Monitoring Plan
May 31, 2012

OHA Comments on PWB's proposed Watershed Inspection and Monitoring Plan
June 9, 2012

Portland Water Bureau's final Watershed Inspection and Monitoring Plan
July 30, 2012

OHA Approval of Portland Water Bureau's final Watershed Inspection and Monitoring Plan
August 1, 2012

Bull Run Treatment Variance Watershed Report for Water Year 2013

December 19, 2013

Portland's Bull Run Treatment Variance Monthly Cryptosporidium Monitoring Results

 

 

Sampling Plan and Study

PWB's First LT2 Variance Study Proposal
February 20, 2008

Portland Water Bureau Letter to EPA with Preliminary Outline of Second Variance Sampling Plan Proposal
July 23, 2008

EPA E-Mail Addressing Second Variance Sampling Plan Proposal
September 21, 2008

Notes from September 26, 2008 Conference Call Between EPA and Portland Water Bureau Regarding Second Variance (Sampling Plan Proposal)
September 26, 2008

Portland Water Bureau Letter to EPA Notifying EPA of Study Design Second Variance Sampling Plan Proposal
February 4, 2009

Portland Water Bureau E-mail to EPA Discussing Tier 1 Validation of High Volume Samples for Second Variance Sampling Plan Proposal
March 5, 2009

Portland Water Bureau Second Variance Sampling Plan Proposal to EPA
April 10, 2009

EPA E-Mail Attachment Sent to Portland Water Bureau Outlining 13 Variance Monitoring Considerations in Preparation for April 23, 2009 Conference Call
April 22, 2009

EPA Letter to Portland Water Bureau Providing Results of EPA Review of Monitoring and Analysis Protocol
May 7, 2009

Portland Water Bureau Letter to EPA Regarding EPA's Response to Second Variance Sampling Plan Proposal
May 14, 2009 

EPA Letter to Portland Water Bureau to Summarize Issues Regarding Sampling and Monitoring and to Transmit Variance Regulations Requirements
June 11, 2009

Portland Water Bureau Summary of Conference Call on July 9, 2009
July 15, 2009

Summary from July 28, 2009 Conference Call between EPA and Portland Water Bureau
July 31, 2009

EPA E-Mail to Portland Water Bureau Clarifying Three Options for Sampling Endpoints
August 11, 2009

E-Mails Between EPA and Portland Water Bureau Clarifying the Three LT2 Endpoint Options and Other Questions
September 1, 2009 - September 28, 2009

EPA E-Mail to Portland Water Bureau Confirming the Minimum Sample Volume for Option 3
November 5, 2009

Sampling Plan and Study in Support of a Variance Application to the Treatment Requirements of the Long Term 2 Enhanced Surface Water Treatment Rule
November 21, 2009

EPA Final Comments and Recommendations for Sampling Plan and Study
March 9, 2010

Portland Water Bureau Letter Acknowledging Receipt of, and Responding to, EPA Final Comments and Recommendations for Sampling Plan and Study
March 15, 2010

Sampling Plan and Study in Support of a Variance Application to the Treatment Requirements of the Long Term 2 Enhanced Surface Water Treatment Rule
May 21, 2010

EPA Letter Approving Method 1623 Modification
May 26, 2010

EPA/Portland Water Bureau Meeting Notes
June 9, 2010 

Portland Water Bureau Letter "Hot Spot" Monitoring Follow-up Letter to EPA
September 2, 2010

City Council Hearing Materials & Resolutions

Resolution 36297 - City Council Resolution to Pursue Regualtory or Legislative Alternatives to LT2
March 2, 2005

Bull Run Treatment Technologies Primer
January 9, 2008

LT2 Report to Council outlining parallel strategies for compliance with LT2
March 25, 2009

City Council Work Session Announcement
June 2, 2009

Senator Merkley's Letter to Commissioner Leonard in Regards to Legislative Alternatives to LT2
June 18, 2009

Bull Run Treatment Options Presentation to City Council Presented by the Water Bureau
June 23, 2009

Portland Water Bureau Follow-Up Answers from City Council Work Session with Appendices
July, 2009

Resolution 36720 - City Council Resolution authorizing planning of UV Treatment
July 29, 2009

Resolution 36904 - City Council Resolution on Compliance Schedule Adjustment
February 1, 2012 

Chronology of LT2-related events - April 1993 to July 2012
August 13, 2012

City Council Work Session Questions from Commissioner Fritz 7-24-12 
August 13, 2012 

City Council Open Reservoir Work Session Follow-up - Storage Volumes 08-27-12
September 6, 2012

City Council Open Reservoir Work Session Follow-Up – Floating Covers Feasibility 8-27-12
September 6, 2012 

City Council letter on reservoirs
June 3, 2013


Compliance with the Open Finished Reservoir Requirements of LT2 

EPA Response to Portland Proposal to Comply with the Open Reservoir Requirements of LT2
February 11, 2009

Index of Supporting Documents used to Develop LT2 Storage Recommendations
March 25, 2009

Portland Water Bureau Open Reservoir Compliance Schedule Proposal and EPA Response
March 25 & 27, 2009

City Letter to EPA Asking for Open Reservoir Variance Guidance
November 4, 2009

EPA Reply to City on Open Reservoir Variance Guidance
January 13, 2010

Portland Water Bureau Letter to EPA-Request for Extension of Time for Open Reservoir Plan Submission
June 8, 2010

DHS Letter to Portland Water Bureau -Approval of Request for Extension of Time for Open Reservoir Plan Submission
June 15, 2010

Letter from State of Oregon, DHS/Public Health Division re: Conditional Approval of Powell Butte #2
January 11, 2011

Portland Water Bureau letter to Oregon Health Authority Drinking Water Program re: Clarification on open reservoir variance
June 1, 2011

Response from Oregon Health Authority Drinking Water Program re: Clarification on open reservoir variance
June 16, 2011

Commissioner Leonard's letter to Portland's federal delegation requesting assistance in pursuing the alternative compliance methods being considered for New York
August 22, 2011

Portland Water Bureau letter to Oregon Health Authority requesting the agency suspend enforcement of the City's approved LT2 compliance schedule for open reservoirs
August 23, 2011

City Council letter to Senator Merkley requesting support for relief from requirement to cover open reservoirs
September 12, 2011

Response from Oregon Health Authority regarding Portland's request for suspension of uncovered drinking water reservoir compliance schedule
October 13, 2011

Oregon delegation letter to Environmental Protection Agency requesting assessment of circumstances relevant to Portland's drinking water system as it reviews LT2 rule
October 13, 2011

OHA Response to Indefinite Suspension of Construction Schedule
December 13, 2011

EPA Response to Senator Merkley
January 27, 2012

LT2 Reservoir Deferral Request
February 10, 2012

OHA Denial of Deferral Request
May 17, 2012

Request for Schedule Adjustment of LT2 Requirements for Uncovered Finished Drinking Water Reservoirs
February 4, 2013

Congressman Blumenauer's Letter in Support of an Extension
February 5, 2013

OHA Denial of Schedule Adjustment
April 30, 2013

Questions & Answers: Mt. Tabor Adjustments Project and the LT2 Rule
June 3, 2013

Portland City Council Uncovered Reservoir Position Letter

June 3, 2013

OHA Approval of Tabor Adjustments Phase 1

June 13, 2013