Irvine Ranch Water District Michelson Water Recycling Plant Phase 2 Expansion SCAP Water Quality Committee Meeting Randy Lee, P.E. , Assistant Director of Recycling Operations September 23, 2014

Presentation Overview IRWD Background MWRP Existing Processes Overview MWRP Phase II Expansion Biosolids Project Status Update

IRWD Serves 20% of Orange County

Water, Wastewater, Water Recycling, and Urban Runoff About the Irvine Ranch Water District Water, Wastewater, Water Recycling, and Urban Runoff California Special District governed by a publicly-elected Board IRWD customer base: Residential population: 330,000 Daytime population: >500,000 Service connections: 102,380 IRWD service area: 181 square miles (20% of Orange County) All or part of six cities and unincorporated county: Irvine Tustin Orange Lake Forest Newport Beach Costa Mesa

IRWD Services Drinking Water Sewage Collection Recycled Water Urban Runoff Treatment

Phase 2 Expansion Project ASCE OC Water Treatment Project of the Year - 2013

Michelson Water Recycling Plant Produces 18 MGD of Title 22 recycled water. Phase 2 Expansion increases capacity to 28 MGD. Scheduled completion June 2014.

MWRP Aerial View

Michelson Water Recycling Plant Treatment Process Prior to Expansion FLOW EQUALIZATION BASINS DUAL MEDIA FILTERS PRIMARY SEDIMENTATION TANKS SECONDARY SEDIMENTATION TANKS ACTIVATED SLUDGE BASINS CHLORINE CONTACT TANKS NORTH IRVINE INTERCEPTOR INFLUENT GRINDERS RECYCLED WATER CUSTOMERS SOUTH IRVINE INTERCEPTOR OCSD

Phase 2 Overall Process Train OCSD NORTH IRVINE INTERCEPTOR SOUTH IRVINE INTERCEPTOR HEADWORKS PRIMARY SEDIMENTATION TANKS FLOW EQUALIZATION BASINS ACTIVATED SLUDGE BASINS SECONDARY SEDIMENTATION TANKS DUAL MEDIA FILTERS CHLORINE CONTACT TANKS RW CUST. HIGH RATE CLARIFIER UV DISINFECTION MEMBRANE BIOREACTOR PRIMARY EFFLUENT PUMP STATION

Phase 2 Expansion Overview NEW TREATMENT FACILITIES MODIFIED EXISTING TREATMENT FACILITIES FLOW EQUALIZATION BASINS NEW CHEMICAL FACILITIES NEW ELECTRICAL FACILITIES EXISTING BLOWER ROOM HIGH RATE CLARIFIER MEMBRANE BIOREACTOR UV DISINFECTION PEPS SPENT BACKWASH TANK SPENT BACKWASH TANK EXISTING PSTs NEW PSTs HEADWORKS CHLORINE CONTACT TANK ` EFFLUENT PUMPS

New Headworks

New Primary Sedimentation Tanks

New Primary Effluent Pump Station

Membrane Bioreactor ANOXIC ZONE DE-OX ZONE PERMEATE PUMP ROOM BLOWER ROOM PERMEATE PUMP ROOM ANOXIC ZONE RAS CHANNEL DE-OX ZONE MEMBRANE TANKS ML P.S. AERATION BASIN FINE SCREENS RAS BOX AERATION BASIN ANOXIC ZONE DE-OX ZONE DIP TANK B.P.

MBR Process Flow 30 MGD 5 MGD 10 MGD 5 MGD 10 MGD 30 MGD

MBR Fine Screens & Aeration Basins

MBR Mixed Liquor Pump Station

Loading MBR Membrane Cassettes

MBR Air & Permeate Piping

Permeate Pump & Blower Rooms

MBR Photos

Ultraviolet Disinfection Facility

New Phase 2 Buildings Headworks Membrane Bioreactor High Rate Clarifier Electrical Bldg.

MWRP Phase 2 Overview

Floodwall – 200 Yr Flood Protection

Phase 2 Construction Cost Treatment Process $83 Million Floodwall $ 5 Million Overall Construction Cost: $88 Million Change Orders: $ 4 Million 4.5% Total $92 Million Construction Management $14 Million 15%

Biosolids & Energy Recovery Facilities Project

Biosolids & Energy Recovery Project Project Objectives Beneficially reuse Biosolids and Biogas produced during the treatment process. Manage residuals (Biosolids) at reduced costs to IRWD’s customers. Construct project to meet IRWD’s future Biosolids handling needs. Minimize environmental impacts: Drying and pelletizing reduces export truck loads by factor of four. Reduces greenhouse gas effects by beneficially using pellets locally as a fertilizer or e-fuel.

Biosolids & Energy Recovery Project Project Description IRWD to construct facilities at MWRP for: Biosolids digestion, dewatering and drying Biogas management and energy recovery Odor control systems IRWD would no longer export solids to Orange County Sanitation District (OCSD). Project would also accept Biosolids trucked in from IRWD’s Los Alisos Water Recycling Plant (LAWRP).

Biosolids Facilities Site Location MWRP Biosolids and Energy Recovery Facilities

EXISTING PRIMARY CLARIFIER Simplified Process Schematic DIGESTER GAS CLEANING MICROTURBINES BIOGAS ELECTRICITY FATS, OILS & GREASE EXISTING PRIMARY CLARIFIER DEWATERING CENTRIFUGE THICKENING CENTRIFUGE PELLET STORAGE & LOADOUT CLASS A PELLET HAUL ROTARY DRUM DRYER PS CAKE STORAGE & LOADOUT CLASS B CAKE HAUL (BACKUP) EXISTING SECONDARY CLARIFIER DIGESTED SLUDGE STORAGE ACID-METHANE PHASE ANAEROBIC DIGESTION WAS RECYCLED WATER TO LIQUID TREATMENT CENTRATE TREATMENT

Air Permit Process Diagram

Triple Pass Drying Drum Pneumatic Transporter Heat Drying System Furnace Mixer ID Fan Pellet Cooler To Storage Silos Cake from dewatering Cake Bin Recycle Bin RTO Venturi Scrubber Condenser Triple Pass Drying Drum Gas Recirculation Pneumatic Transporter Atmosphere Preseparator Baghouse

Heat Drying System Produces a pellet suitable for local beneficial reuse Nitrogen for fertilizer Btu content for e-fuel Dryers in CA: Encina (Carlsbad) Sacramento Corona

3-D Model Renderings

FOG Foodwaste Receiving. Digestion Facilities Egg-Shaped Digesters Sludge Holding Tanks Digester Control Bldg. Acid Phase Digesters FOG Foodwaste Receiving. 36

Dryer and Odor Control Discharge Stacks Biosolids Handling Building Dryer and Odor Control Discharge Stacks Polymer Storage Solids Receiving Pellet Loadout

Biosolids Handling Building Dryer Area Centrifuge Area Polymer Storage Centrate Treatment 38

Biogas Treatment & Microturbines Biogas Storage Biogas Conditioning Microturbines

Centrifuge Room Thickening Centrifuges Dewatering Centrifuges 40

Dryer System – Lower Level Pellet Screen Dryer Drum 41

Solids/Off Gas Separation Dryer System – Upper Level Solids/Off Gas Separation Recycle Bin Pellet Mixer Dryer Drum 42

Sub-Surface View of 3,028 Piles

Construction Photos

Construction of structure and Construction Photos Pile Installation – Digester Area Completed: Construction of structure and

Construction Photos Pile Installation – Basement of Solids Handling Building

Installation of Piles in Methane Digester Area May 2014 Quarterly Report Installation of Piles in Methane Digester Area

Installation of Piles in Solids Handling Facility May 2014 Quarterly Report Installation of Piles in Solids Handling Facility

Project Schedule

Project Schedule DATE ACTIVITY April 29, 2013 Notice of Award June 3, 2013 Notice to Proceed Sept. 2013 – March 2014 Pile Driving January 17, 2016 Anaerobic Digestion Facilities Online March 2, 2016 Produce Class B Biosolids (Cake) June 30, 2016 Microturbine Power Generation Online August 29, 2016 Produce Class A Biosolids (Pellets) October 28, 2016 Project Completion

Biosolids Construction Cost Pile Driving $ 10 Million 6% Digesters $ 45 28% Dryer $ 13 8% Biogas & Microturbines $ 8 5% Sitework $ 14 9% Other $ 73 45% Total Bid Amount $ 163 Million

Contact Information: Randy Lee, P.E. Irvine Ranch Water District leer@irwd.com 949-453-5780