Resources

Documents & Reports in Reverse Chronological Order

• Sewer System Evaluation Survey (SSES I/I) Infiltration Study
     Appendix C:  Manhole Inspections and Flow Isolation Data
     Appendix D:  CCTV Data
     Appendix F:  Underwood Engineers Pilot Area TM (2017)
     Appendix G:  Underwood Engineers Pilot Area TM (2019)
• Digester Feasibility Study for Pease Wastewater Facility
• Summary of Conceptual Anaerobic Digester Feasibility Study
   

• November 2019:  Response Letter to EPA on Pease Wastewater Facility NPDES Permit Renewal
• June 2019: Sagamore Creek Water Quality Sampling Report Summary for 2018
• June 2019: Pease Wastewater Facility NPDES Permit Renewal
• March 2019: Pease Antidegradation Study (water quality sampling in support of the future Pease NPDES Permit)
  • Appendices
• March 2019: Consent Decree Third Modification Regarding Stormwater Mitigation Project
• January 2019: History of the Portsmouth, NH Sewerage System Report
   

• July 2018:  Sagamore Creek Water Quality Sampling Program Report
• January 24, 2018: Letter from EPA on Combined Sewer Overflow (CSO) Supplemental Compliance Plan (SCP) & Sewer System Evaluation Survey (SSES) Reports
• January 9, 2018: Letter from EPA on Chemically Enhanced Primary Treatment Facility (CEPT) Pilot Study Report
   

• December 22, 2017: Chemically Enhanced Primary Treatment Facility (CEPT) Pilot Study Report
• December 22, 2017: CSO Supplemental Compliance Plan (SCP) Final Report
• August 2017: Peirce Island, Sludge Processing Building Documentation, NH Historic Property No. 743
• July 10, 2017: EPA letter regarding the City’s proposed Supplemental Compliance Plan (SCP) 
• June 2017: Revised Final CSO Post-Construction Monitoring Plan/Report 
• June 2017: CSO Supplemental Compliance Plan
• June 20, 2017: Public Construction Tour Architectural Building Renderings
• June 16, 2017: Letter to EPA on Revised Final CSO Post-Construction Monitoring Plan/Report
• May 2017: Marcy Street Outfall Report
• May 2017: Marcy Street Outfall Report Appendix A
• May 2017: Marcy Street Outfall Report Appendix B
• May 2017: Marcy Street Outfall Report Appendix C
• April 18, 2017: Letter from EPA on Post Construction Monitoring Plan
• March 2017: Full Report of 2/3/17 Sewage Discharge
• March 2017: Final FDA Peirce Island WWTP dye study Report
• February 3, 2017: Notification of SSO due to sewer main break
   

• December 6, 2016: Letter from EPA on Construction Milestones
• November 2016: CSO Post-Construction Monitoring Plan/Report
• September 2016: Consent Decree Second Modification with Sagamore Ave South Figure
• September 2016:  Memorandum of Agreement with COP, EPA and NH Div Historical Resources for PI WWTF 
• Peirce Island WWTF Upgrade bid results were received on June 23, 2016 and results are available by clicking here.
• Infiltration / Inflow Technical Memorandum #1, #2, #3
• June 2016: Infiltration / Inflow Analysis
• May 2, 2016: REVISED Notice of Lodging of Proposed Consent Decree Second Modification Under The Clean Water Act
• April 8, 2016: Notice of Lodging of Proposed Consent Decree Second Modification Under The Clean Water Act
• March 16, 2016: Letter from Coastal Conservation
• March 11, 2016: New Hampshire Department of Environmental Services letter regarding Peirce Island Bond
• March 11, 2016: Conservation Law Foundation Letter Regarding Peirce Island Bond
   

• December 2015: Statement of Position regarding Consent Decree
  • Press Release 12/15/15
  • Statement of Position
  • Index to Exhibits
  • Sharefile link to Exhibits 1 - 29
• September 2015: Transmittal Letters to EPA and DES regarding 90 Percent PI WWTF Design Documents
• July 2015: Letter from EPA to Portsmouth Regarding Total Nitrogen Potential
• July 2015: Transmittal Letters to EPA and DES regarding 75 Percent PI WWTF Design Documents
• June 2015: Pease and Pease Regional Wastewater Evaluation Report
• May 2015: Staff Recommendation to City Manager Regarding Pease Wastewater Option Evaluation
   

• October 2014: Transmittal Letter to EPA and DES regarding PI WWTF 60 Percent Design Document
• August 2014: Value Engineering Report of Peirce Island WWTF Design
• July 2014: Peirce Island WWTF Upgrade Preliminary (30 Percent) Design Report
• May 2014: Transmittal Letters to EPA and DES regarding Peirce Island WWTF Phase 1 Design Summary Report
• March 2014: Peirce Island WWTF Phase 1 Design Summary Memo
• February 2014: Joint Report of Peer Review Panel for Numeric Nutrient Criteria for the Great Bay Estuary
• January 2014: Pease WWTF Facilities Evaluation (DRAFT)
• Sept. 2012: Wastewater Technology Piloting Phase 2 Technical Memorandum
  • Technical Memorandum
  • Attachment A - Phase I Technology Evaluation and Final Technical Memo (33MB)
  • Attachment B - Blueleaf Incorporated Pilot Report (18MB)
  • Attachment C - C through I
• July 2012: Modified Consent Decree (approved by Court February 2013)
• July 2012: Letter from EPA to Portsmouth Regarding Total Nitrogen Potential
• November 2010: Wastewater Master Plan & Long Term Control Plan: Final Submission
• June 2010: Wastewater Master Plan: Draft Submission
• September 2009: Consent Decree
• May 2007: Wastewater Master Plan Work Plan 
• April 2007: Peirce Island WWTF Secondary NPDES Permit No. NH0100234 Final
• April 2005: CSO Long Term Control Plan
• April 2005: CSO Long Term Control Plan (Appendices)
• August 2000: Pease WWTF Permit
• November 1999: 201 Facilities Plan Report

EPA Region 1 issued the Great Bay Total Nitrogen General Permit for 13 wastewater treatment facilities (WWTFs) that discharge treated wastewater containing nitrogen within the Great Bay watershed in New Hampshire.

Great Bay Total Nitrogen General Permit (NPDES GP NHG58A000) issued November 2020

City of Portsmouth Comments to EPA's draft Great Bay Total Nitrogen General Permit (NPDES GP NHG58A000) submitted May 8, 2020

Draft Great Bay Total Nitrogen General Permit for Wastewater Treatment Facilities 

EPA Press release on Comment Period Extension (Mar 4, 2020)

Pease Development Authority

Wastewater Disposal Facilities Transfer Agreement

Amendment 1 to Wastewater Disposal and Water Service Agreement 

Municipal Services Agreement 

Wastewater Disposal and Water Service Facilities Sublease and License Agreement between PDA & City

Wastewater Disposal Services Agreement 

Municipal Service Agreement Appendices (Maps - Roadways, Utilities, Airport) 

FAQs on Treatment Planning