Lynnhaven River Green Ribbon Committee

SOC/Consent Decree RWWMP/Regionalization

June 27, 2013

• Overview of System • Special Order by Consent

– Overview – Prompt Repairs – Private Property I/I - SLIP

• Consent Decree – Condition Assessment

• Consent Decree Stipulation • Consent Decree Modification/Regionalization

Outline

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Regional/HRSD Sanitary Sewer System

• Regional Network: – 1.6 million

population served – 5,800 miles of

gravity sewer – 1,500 PS – 1,200 miles FM

• HRSD System: – ~430 miles large

diameter FM – ~ 50 miles gravity – 81 PS – 13 STPs

Consent Order Overview

Data Collection and Flow

Monitoring • SSO characterization • Use of existing

information • System mapping (GIS) • Flow monitoring

procedures • Rainfall monitoring • Sewer flow evaluation • Flow evaluation

reporting

SSES Planning

• SSES Basin criteria • Prioritization

Hydraulic Performance Assessment

• Guidelines for development and application of hydraulic model

• Procedures and standards for calibration and verification

Condition Assessment of

Sewers and Pump Stations

• Guidelines for condition assessment

• Assessment standards • Reporting

requirements • Find and fix guidelines

Rehabilitation Planning

• Rehabilitation resulting from SSES work

• Evaluation of effectiveness of rehabilitation on I/I reduction

Regional Wet-Weather

Management Plan Development

• Capacity assessment • Level of service

selection • Capacity enhancement

solutions • Affordability

Data Collection and Flow

Monitoring • SSO characterization • Use of existing

information • System mapping (GIS) • Flow monitoring

procedures • Rainfall monitoring • Sewer flow evaluation • Flow evaluation

reporting

SSES Planning

• SSES Basin criteria • Prioritization

Hydraulic Performance Assessment

• Guidelines for development and application of hydraulic model

• Procedures and standards for calibration and verification

Condition Assessment of

Sewers and Pump Stations

• Guidelines for condition assessment

• Assessment standards • Reporting

requirements • Find and fix guidelines

• Model based on Flow Monitoring Data – Minimum 20% of Locality basins

• Truly a Regional Model – Not HRSD Model • Each Basin has Hydrology

• Calibrated using HRSD FPR Monitoring

Regional Hydraulic Model

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• Condition Assessment is performed • Brown and Caldwell reviews inspection results • Prompt Repair Committee review selected

results – Committee Members

Chris Stephan - Chief of North Shore Interceptors David Cooley - Chief of North Shore Engineering Karen Harr - Chief of South Shore Interceptors Phil Hubbard - Special Assistant for Compliance Richard Stahr - Vice President of Brown and Caldwell

• Committee determines if defect requires Prompt Repair

• If not Prompt Repair, goes to Rehabilitation Plan

Prompt Repairs

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Work Order PR 001 – 41st Street (Cont.)

24-inch gravity sewer and 16-inch force main replacement

24-inch force main replacement

Work Order PR 013 – Deep Creek

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24-inch force main replacement

Work Order PR 013 – Deep Creek (Cont.)

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• Pilot Program – HRSD Commission • Virginia Beach – Harton Circle - Malibu

– $4.4 Million in Replacement – 232 Homes Proposed – 163 Inspected – 18 Lateral Defects

• Localities Perform Comprehensive Rehabilitation – Reduce I/I

• HRSD Private Property – Sewer Lateral Inspection Program (SLIP)

Private Property Program Outline

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Why Are We Doing Private Property I/I - SLIP?

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What Will Happen During SLIP?

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Step 1: Test

Step 2: Analyze

Step 3: Repair

• Wet weather simulation/television inspection

Step 1: Testing

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• Negotiations – DOJ/EPA/DEQ • Locality 308 Request • 16 Iterations • Effective Date of Consent Decree - February 23,

2010 • Similar to SOC with a few exceptions

– Penalty - $900,000 – FPR – Quality Action Plan (QAP) – Interim System Improvements - $140 million – Condition Assessment – More Stringent – Stipulated Penalties for SSO’s and Projects

Consent Decree

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Condition Assessment Program

SPECIAL ORDER BY CONSENT – Virginia Department of Environmental Quality

CONSENT DECREE – Environmental Protection Agency

CONDITION ASSESSMENT PLAN

•267,850 feet of gravity sewer (100% of system) •1,278 manholes (100% of system) •255,646 feet of force main (10% of system)

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Gravity Sewer Inspection – all manholes and sewers 24 inches and smaller – CCTV

Unit price project for inspection and cleaning, $513,200

Gravity Sewer Inspection – sewers greater

than 24 inches in diameter – CCTV, Sonar and Laser

Unit price contract project for inspection and cleaning, $1,941,557

PROJECTS IDENTIFIED

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267,850 feet of gravity sewer (100% of system) 1,278 manholes (100% of system)

Force Main Inspection Level 1 and Level 2 Project

What is it? A utility type construction project to support special technology inspection tasks

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SONDE AND DROGUE

Not so simple unit price contract to inspect active pressurized force mains, $7,459,823 Initial Contract Value - CO #1 $2,462,725 Revised Contract Amount $9,992,548

FORCE MAIN AIR VENT INSERTION

Mobilizing equipment I Traffic control I Erosion and sediment control I Saw-cutting concrete and asphalt I Excavation, sheeting and shoring I Hot-tapping I Valve installation I Patching and paving I Specialty inspections I

GPS field record data I Flow augmentation

Construction Elements and Contracting

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TRAFFIC CONTROL

HOT-TAPPING

FLOW AUGMENTATION

Level 2 Inspection – BEM Wall Thickness

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• Consent Decree – Paragraph 167 – To comply with SOC – RWWMP due November

2013 – Paragraph allowed for RWWMP due date to be

extended until July 31, 2014 – Formal modification to CD

Consent Decree Stipulation

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• Regional Cooperation wavering • Flow Agreements – Localities/HRSD • May 2012 met with DOJ/EPA/DEQ in

Washington – They were receptive – Worked on Modification

Regionalization – CD Modification

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• Regional Study • Regional Hydraulic Model

– Preliminary Peak Flow Estimates – PPFE’s – Private Property I/I

• Comparative Analysis – Cost 2yr and 10 yr – Non-Regionalization – 14 Separate Localities &

HRSD – No one Controls Own interest – Regionalization – One System Owner/Operator –

Controls Own interest • Outlines the due dates for RWWMP • Additional Interim System Improvements

Regionalization – CD Modification

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• Study Complete – August 31, 2013 • Localities and HRSD – February 28, 2014 • Work out Transfer – February 28, 2015 • RWWMP

– Report NO – April 30, 2015 – Report Yes – Localities/HRSD NO – Oct. 1,2015 – Report Yes – Localities/HRSD YES –Oct. 1 2016

• Regionalization YES – HRSD Revised MOM – October 1, 2018

• 18 Additional Interim System Improvements

Regionalization – CD Modification

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Contrast Two Approaches

• Non-Regionalization – Rehab I/I reductions and costs from Locality PPFE – Locality Capacity Enhancements from Locality

Capacity Assessments – Regional Capacity Enhancements based on post rehab

flows from PPFEs – HRSD Committed Improvements Included

• Regionalization – Rehab I/I reductions and costs based on optimum level – Locality and Regional Capacity Enhancements based

on post rehab flows from optimum level – HRSD Committed Improvements Included

Treatment Plant Current Plan, # Catchments Rehab

Regionalized, # Catchments Rehab

Army Base 7 8 Atlantic 198 81 Boat Harbor 134 50 Ches-Liz 42 0 James River 56 19 Nansemond 117 52 VIP 29 36 Williamsburg 75 50 York River 82 22

TOTALS 740 318

Focused Comprehensive Rehabilitation

25 Preliminary Results subject to revisions

Questions

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