Q U A L IF IC A T IO N S

ozone and other oxidants Drinking

Water

p r e f a c e / c o n t e n t sV:\C

ompa

nySO

Qs\O

zona

tion\

Indd

\00P

refa

ceOz

n.in

dd 0

2061

9

Carollo Engineers is an environmental consulting firm with more than 1,050 employees in 44 offices throughout the United States. All of our work is performed in the areas of water and wastewater, resulting in a level of understanding of key project issues that few can match. Carollo strives to maintain the tradition of using sound and proven engineering principles while moving progressively forward to keep abreast of changing times and new technologies.

This is a specialty Statement of Qualifications (SOQ) for Carollo Engineers detailing some of our experience and expertise in the field of water treatment specific to this topic.

CONTENTS

Issues and Differentiators

Key Achievements

Testing and Optimization Capabilities

Publications

Company Profile

i s s u e s a n d d i f f e r e n t i a t o r s 1V:\C

ompa

nySO

Qs\O

zona

tion\

Indd

\01I

ssue

sOzn

.indd

tampa Bay Water

City of Peoriatown of Gilbert

City of tucson

Mesa ConsolidatedWater District

City of Santa Barbara Metropolitan Water Districtof Southern California

City of Vallejo

Santa Clara ValleyWater District

Southern nevadaWater Authority Colorado Springs Utilities

Metropolitan Water Districtof Salt Lake and Sandy

Central Utah Water Conservancy DistrictWeber Basin Water Conservancy District

City of Arlington

City of Ft. Worth

Carollo is a leader in the full-scale application of advanced drinking water technology, including ozonation. This work began over two decades ago with the design of the ozone system for the City of Tucson, AZ, and is on-going today.

Carollo’s dedication to providing innovative and cost-effective solutions is demonstrated by numerous projects, including:

Design of pre- and intermediate ozonation facilities for the !

City of Arlington, TX. This project incorporated the use of our computational fluid dynamic (CFD) models.

Design of the Alfred Merritt Smith Water Treatment Facility !

(WTF) expansion for the Southern Nevada Water Authority. Carollo, in joint venture, designed an expansion of this facility from 400 to 624 mgd, making it the largest ozone generation system in the world at the time of construction.

Use of ozone and UV disinfection for the Weber Basin Water !

Conservancy District, where we designed an expansion of the Davis North Water Treatment Plant (WTP) from 26 to 46 mgd.

The use of ozone and UV resulted in a significant

cost savings over the next-lowest-cost

alternative.

These are just a few examples of Carollo’s

ozone experience. We have highlighted these and

additional relevant ozone-related projects in the table on the next page and the project profiles that follow.Carollo Engineers Ozone Design Experience

When compared to chlorine-based

oxidants, ozonation has many benefits,

including taste and odor control and

improved disinfection.

iss

ue

s a

nd

dif

fere

nti

ato

rs

V:\CompanySOQs\Ozonation\Indd\01IssuesOzn.indd2

Carollo engineers Ozone Design experience

Client/ProjectCapacity

(mgd)

Ozone Generation

Capacity (ppd)

Southern Nevada Water Authority, Las Vegas, Nevada - Alfred Merritt Smith WTF

624 20,000

Metropolitan Water District of Southern California - F.E. Weymouth Filtration Plant

520 13,000

City of Fort Worth, Texas - North and South Holly WTPs 210 9,750

City of Tucson, Arizona - Central Arizona Project (CAP) WTP 150 6,000

City of Arlington, Texas - John Kubala WTP 97.5 5,500

Metropolitan Water District of Salt Lake and Sandy, Utah - Point of the Mountain WTP

70 1,750

City of Arlington, Texas - Pierce Burch WTP 68 3,000

Weber Basin Water Conservancy District, Layton, Utah - Davis North WTP

46 1,200

Santa Clara Valley Water District, San José, California - Penitencia WTP

42 960

City of Vallejo, California - Fleming Hill WTP 42 1,875

Town of Gilbert, Arizona - Gilbert WTP 40 2,500

Tampa Bay Water, Florida - Lithia Hydrogen Sulfide Removal Facility Utilizing Ozone Treatment - Predesign, EPCM Selection, Design and Construction Support Services

24 3,000

City of Peoria, Arizona - Greenway WTP 16 1,450

Mesa Consolidated Water District, Costa Mesa, California - Colored WTF

4 1,500

k e y a c h i e v e m e n t sV:\C

ompa

nySO

Q\sO

zona

tion\

Indd

\02K

eyAc

hiev

eOzn

.indd

3

The project profiles on the following pages present highlights of Carollo’s key achievements in drinking water treatment using ozone and other oxidants. These examples illustrate our ability to:

! Implement innovative technologies to improve process design and performance.

! Integrate engineering and research to achieve practical solutions tailored to specific client needs.

! Involve project participants early in the process to “demystify” advanced technology and fully understand each other’s needs.

! Offer advanced solutions that are practical, affordable, and reliable.

We would be happy to provide client references that can attest to the quality and responsiveness of Carollo’s services upon request.

ke

y a

ch

iev

em

en

ts

V:\CompanySOQs\Ozonation\Indd\02KeyAchieveOzn.indd4

TAMPA BAY WATER, FLORIDA

Tampa Bay Water is tasked with developing, storing, and supplying water to Hillsborough, Pasco, and Pinellas counties; and the cities of New Port Richey, St. Petersburg, and Tampa. Groundwater from the South Central Hillsborough Regional Wellfield is treated at the Hillsborough County Lithia WTP. The finished water from the WTP currently meets the hydrogen sulfide removal requirements, as specified in their master water supply contract, through tray aeration and biological oxidation of the remnant hydrogen sulfide. As described in a Memorandum of Understanding (2004), Tampa Bay Water will replace the current hydrogen sulfide removal facility with a new, more reliable process, and will own and operate the new facility.

Tampa Bay Water determined through on-site pilot testing that the best process for this new facility is ozonation. Furthermore, the project delivery was approved by the Tampa Bay Water Board of Directors to proceed using an Engineer-Procure-Construction Management (EPCM) approach. As such, the overall goal was to develop a robust, best-value facility that meets master water supply contract requirements and achieves operational status in accordance with the schedule.

Tampa Bay Water selected Carollo as the Owner’s engineer for the treatment improvements at the Lithia WTP. Project tasks included:

! Assisted Tampa Bay Water in acquiring property for the project, and assisted the EPCM team in acquiring the permits necessary to support the project.

! Prepared a Preliminary Design Package (i.e., 30-percent complete drawings, specifications, and details) to establish the baseline prescriptive and performance requirements for the EPCM’s design.

! Prepared the requisite procurement documents necessary to secure a qualified EPCM team to design and construct a 45-mgd hydrogen sulfide removal system using ozone.

! Assisted Tampa Bay Water in negotiating a guaranteed maximum price and final EPCM contract agreement.

! Provided design-phase oversight services to assure the EPCM fulfills the requirements of the preliminary design package.

! Provided construction-phase services to assure the EPCM team fulfills the requirement of the procurement documents, and secured a qualified contractor operator.

As part of the preliminary design, Carollo

developed a 3D model of the ozone system for

the Lithia WTP.

Lithia Hydrogen Sulfide Removal Facility Utilizing Ozone Treatment - Predesign, EPCM Selection, Design and Construction Support Services 24-mgd (average) and 45-mgd

(max) water treatment plant.

3,000 ppd of ozone generation capacity.

Project delivery through EPCM approach.

Permitting support, preliminary design package, and design

and construction phase oversight.

H I

G H

L I

G H

T S

k e y a c h i e v e m e n t sV:\C

ompa

nySO

Q\sO

zona

tion\

Indd

\02K

eyAc

hiev

eOzn

.indd

5

U.S. ARMY CORPS OF ENGINEERS, JACKSONVILLE, FLORIDA

As part of the $8.4-billion Comprehensive Everglades Restoration Program (CERP), the U.S. Army Corps of Engineers and the South Florida Water Management District selected Carollo to perform the first pilot testing and engineering analysis of water treatment technologies on Lake Okeechobee. This pilot study provided the basis for design and cost estimates for treatment systems with an ultimate capacity of approximately 1.5 billion gallons per day (bgd).

The CERP presents a framework for Everglades restoration and contains 68 specific components to restore more natural flows of water and improve water quality in the south Florida ecosystem. The plan will restore the habitat of threatened and endangered species and improve fresh water supply in the region. This study evaluated alternatives for treating Lake Okeechobee water prior to injection in aquifer storage and recovery (ASR) wells.

The alternatives proposed by Carollo applied the latest proven treatment technologies leveraged with a global analysis of all goals and constraints surrounding the project. The selected treatment train consisted of bank filtration (BF), ozonation, and UV disinfection. BF addressed microbial, total organic carbon (TOC), color, taste, odor, and turbidity goals cost-effectively with minimal operational and maintenance requirements. Ozonation provided additional treatment for microbial and organic contaminants and also substantially increased the UV transmittance of the water, thereby reducing the capital and operational costs of the UV disinfection

process. UV disinfection provided a final barrier to pathogens, particularly disinfectant-resistant pathogens such as Cryptosporidium. The treatment train (BF/ozonation/UV) provided multiple barriers to target water quality impairments. As treatment may be applied at up to 300 individual sites across rural central and south Florida, other key attributes of the treatment train included: no waste stream disposal, minimal chemical delivery requirements, and low operational and maintenance costs.

Carollo’s ozone pilot skid is flexible enough to treat even difficult waters

like Lake Okeechobee (max TOC = 40 mg/L) and operate under harsh

environments, such as the south Florida summer.

Comprehensive Everglades Restoration Program

Pilot study and engineering analysis to evaluate potential treatment options for an ASR project that included hundreds

of wells.

Basis of design criteria and cost estimates for 1.5-bgd

treatment system.

Ozonation and UV, in conjunction with bank

filtration.

Cost-effective solution multi-barrier treatment alternative for the challenging water of

Lake Okeechobee.

H I

G H

L I

G H

T S

ke

y a

ch

iev

em

en

ts

V:\CompanySOQs\Ozonation\Indd\02KeyAchieveOzn.indd6

The Southern Nevada Water Authority contracted Carollo, in joint venture, to design the $145-million Southern Nevada Water System Improvements Project. The project consisted of the following components:

! Expansion of the Alfred Merritt Smith WTF from 400 mgd to 624 mgd.

! Four miles of 12-foot-diameter tunnel through the River Mountains.

! A 55-million-gallon reservoir.

! 33,000 feet of 60-inch transmission pipeline.

! 2,500 feet of 96-inch inlet/outlet piping.

! A flood control detention basin and flow dissipation structure.

! Modifications to the existing Twin Lakes pumping plant.

! A 2,000-cfs flood control channel.

! Seven hot tap connections to steel and prestressed concrete pipe, ranging in size from 24 inches to 72 inches in diameter.

! Micro-tunneling and bored-and-cased crossings of highways and major arterials within the metropolitan area.

Combined, these projects have increased water delivery capacity and reliability to customers in the cities of North Las Vegas, Henderson,

and Boulder City, as well as the Las Vegas Valley Water District service area.

The joint venture team designed ozone treatment units at the head of the treatment plant for primary disinfection purposes. The construc tion cost of these improvements was in excess of $50 million. Carollo was responsible for the hydraulic design (using computational fluid dynamic modeling), the site utilities relocation, mass grading, and design of contactor basins. The plant has the world’s largest ozone generation system at a water treatment plant. A total of 20,000 pounds per day of ozone are provided from five medium-frequency generators producing up to 12 percent ozone, by weight.

Carollo’s water treatment plant experience includes plants

ranging from 1 mgd of capacity to the 624-mgd

Alfred Merritt Smith WTF in Las Vegas, NV.

SOUTHERN NEVADA WATER AUTHORITY, LAS VEGAS, NEVADAAlfred Merritt Smith Water Treatment Facility

H I

G H

L I

G H

T S

624-mgd water treatment facility, one of the largest direct

filtration plants in the world.

World’s largest ozone generation system at a

treatment plant.

Successful resolution of complex construction sequencing issues.

k e y a c h i e v e m e n t sV:\C

ompa

nySO

Q\sO

zona

tion\

Indd

\02K

eyAc

hiev

eOzn

.indd

7

Built in 1939, the Metropolitan Water District of Southern California’s (MWD) 520-mgd F.E. Weymouth Filtration Plant is one of the largest conventional treatment/filtration plants in the United States. This facility treats water delivered from the Colorado River Aqueduct and the State Water Project’s California Aqueduct. As a result of the Stage 2 Disinfectant/Disinfection By-Products Rule (D/DBPR), the U.S. EPA essentially requires the use of ozone or other alternative (non-chlorine) disinfection at all plants treating significant amounts of State Project Water due to elevated levels of DBP precursors. The blended water at the Weymouth plant currently undergoes primary disinfection using chlorine gas and secondary disinfection using chloramines for residual preservation. MWD has been preparing for the conversion of disinfection facilities at several of its filtration plants through extensive pilot testing and other applied research, including the 5.5-mgd oxidation demonstration plant at Weymouth. The result of this research led to the planned Oxidation Retrofit Program (ORP).

In early 2003, MWD selected Carollo to provide perform a Site Engineering Study for the Weymouth plant. This study essentially determined a site master plan that incorporated near-term and possible future projects, including the ORP facilities. Subsequently, MWD contracted with Carollo to perform preliminary and final design of the ORP facilities at Weymouth. The following components provide a design ozone dosage of 2.0 mg/L for up to 520 mgd, or nearly 8,700 ppd of on-site generated ozone to the Weymouth facility. With redundancy, the ozone generation system will be capable of producing up to 13,000 ppd.

! Liquid oxygen storage and ozone generation, with possible future oxygen separation facilities.

! Four ozone contactors with ten chambers each for a design contact time of 10 minutes.

! An off-gas ozone destruction system and effluent ozone quenching system.

! pH adjustment upstream of the contactors to minimize bromate formation, with readjustment downstream of the contactors.

! Standby primary disinfection with sodium hypochlorite or gaseous chlorine.

! Taste and odor control with hydrogen peroxide.

! Relocation and replacement of the plant flow meter and rapid mix unit, and rerouting of the filter backwash return upstream of the ozone contactors.

The final design was completed in September 2006 with the facilities operational by 2010.

METROPOLITAN WATER DISTRICT OF SOUTHERN CALIFORNIAF.E. Weymouth Filtration Plant

H I

G H

L I

G H

T S

520-mgd water treatment plant.

13,000 ppd of ozone generation capability.

pH adjustment upstream and downstream of the ozone contactors for bromate

minimization.

Taste and odor control assisted with hydrogen peroxide.

Implementing ozonation at MWD’s

F.E. Weymouth Filtration Plant will allow

unrestricted blending of Colorado River

Water and State Project Water and

optimize source water usage.

ke

y a

ch

iev

em

en

ts

V:\CompanySOQs\Ozonation\Indd\02KeyAchieveOzn.indd8

Carollo, in association with others, completed the design of preozonation and intermediate ozonation facilities and filtration improvements for two water treatment plants for the City of Arlington. The design team used computational fluid dynamic (CFD) models to optimize the ozone contactor design. The ozonation improvements include 3,000 pounds per day of generation capacity at the 68-mgd Pierce-Burch WTP and 5,500 pounds per day generation capacity at the 97.5-mgd John F. Kubala WTP. Liquid oxygen (LOX) is stored in LOX tanks and fed to the medium-frequency generators where ozone is produced at a concentration of up to 10 percent by weight. The design provides for both preozonation and intermediate ozonation contactors at each plant to obtain the maximum benefits for microflocculation and disinfection. Filter improvements involved replacing the existing underdrains with porous-plate air/water underdrains and replacing the filter media with granular activated carbon (GAC) over sand.

These improvements were the result of a year-long treatability study conducted by Carollo, in association with others, to determine Arlington’s best course to comply with impending regulations and address taste and odor problems occurring during the warmer months. The study involved bench-scale and pilot-scale testing of enhanced coagulation, ozonation/sand filtration, and ozonation with GAC contactors. The study concluded that two-stage ozone with GAC/sand filters was the most cost-effective method of meeting Arlington’s water quality goals of eliminating taste and odor problems, reducing trihalomethanes and providing another barrier against potential Cryptosporidium contamination.

Through the use of CFD modeling,

Carollo was able to increase ozone

reactor efficiency by 20 percent,

significantly reducing construction costs.

CITY OF ARLINGTON, TEXASOzonation Facilities at the Pierce-Burch and Kubala Water Treatment Plants

H I G

H L

I G

H T

S

First community in Texas to have its entire water supply treated

with ozone.

68-mgd and 97.5-mgd water treatment facilities.

Design of $20 million in preozonation and intermediate

ozonation facilities at two water treatment plants.

CFD used to optimize ozone contactor design.

Reduction in tastes and odors, trihalomethanes, and potential

Cryptosporidium contamination.

k e y a c h i e v e m e n t sV:\C

ompa

nySO

Q\sO

zona

tion\

Indd

\02K

eyAc

hiev

eOzn

.indd

9

Carollo designed an expansion and upgrade for the Weber Basin Water Conservancy District’s Davis North WTP in Layton, Utah. The project, which increases capacity from 26 mgd to 46 mgd, includes UV disinfection for the full 46-mgd capacity using 20-mgd reactors. It is the first such system for treatment of potable water in the State of Utah and one of the first large-scale drinking water facilities in the country utilizing UV disinfection.

The design also included new conventional flocculation and sedimentation basins, and pre- and intermediate ozone designed for taste and odor control, and enhanced particle removal. An evaluation of disinfection and taste and odor control strategies showed that the synergistic combination of ozone and UV disinfection resulted in a facility cost reduction of approximately 50 percent compared to the next cost alternative.

WEBER BASIN WATER CONSERVANCY DISTRICT, LAYTON, UTAHDavis North Water Treatment Plant

H I G

H L

I G

H T

S

Plant expansion to 46 mgd.

Pre- and intermediate ozone designed for taste and odor

control and enhanced particle removal.

One of the country’s first large-scale UV disinfection drinking

water installation.

Conjunctive use of ozone and UV resulted in a facility cost

approximately 50 percent of the next-lowest-

cost alternative.

Carollo designed an expansion of Weber Basin’s Davis North WTP

from 26 to 46 mgd. Facilities include ozonation and UV disinfection.

ke

y a

ch

iev

em

en

ts

V:\CompanySOQs\Ozonation\Indd\02KeyAchieveOzn.indd10

SANTA CLARA VALLEY WATER DISTRICT, CALIFORNIASCVWD Water Treatment Improvement Project

Carollo provided pre-design for 242 mgd of UV disinfection facilities for the

Santa Clara Valley Water District’s three water treatment plants.

Carollo is currently involved in Stage 2 of the Santa Clara Valley Water District (SCVWD) Water Treatment Improvement Project, which includes detailed design of GAC filter caps, settled water ozonation, washwater treatment improvements, additional chemical feed facilities, and filter-to-waste enhancements at the Penitencia WTP. The plant will use ozone to meet the multiple objectives of primary disinfection and taste and odor.

SCVWD was concerned that a failure in any portion of the ozone disinfection system would render the plant without primary disinfection. Therefore, the project team evaluated UV disinfection with standby power to provide backup primary disinfection downstream of the biologically active GAC filters, and to meet future regulatory requirements at the 42-mgd Penitencia, 75-mgd Rinconada, and 100-mgd Santa Teresa WTPs. Carollo participated in expert panel workshops and prepared a technical memorandum that provided layouts and cost estimates for UV disinfection. SCVWD will consider implementing this technology when it is needed.

H I

G H

L I

G H

T S

Ozonation for primary disinfection and

taste and odor control.

Washwater treatment improvements.

Filter-to-waste enhancements.

Evaluation of UV disinfection with standby power to provide backup primary

disinfection downstream of the biologically-active GAC filters.

k e y a c h i e v e m e n t sV:\C

ompa

nySO

Q\sO

zona

tion\

Indd

\02K

eyAc

hiev

eOzn

.indd

11

Carollo completed a comprehensive plant evaluation that identified the necessary process upgrades and expansion for the City of Vallejo Fleming Hill WTP. The Fleming Hill facility is a conventional plant that treats water from the Sacramento/San Joaquin River Delta. It is located on the top of a hill bounded by steep terrain on one side, a 10-million-gallon reservoir on another side, and single family homes on the other two sides. Upgrades were needed for improved control of water quality to meet stringent new drinking water regulations and to improve plant reliability. Increasing demand also required a capacity increase. Vallejo retained Carollo to design process upgrades to bring the plant capacity from 27 to 42 mgd. Carollo also provided construction support, start-up, and training services.

Major treatment plant features and facilities included in the design were:

! Complete chemical systems redesign including secondary containment of all chemical facilities and pre-ammonia addition for control of brominated DBPs.

! Flash and rapid coagulant chemical mixing.

! Horizontal turbine, three-stage flocculation and improved sedimentation.

! Pre-and intermediate ozonation.

! Both upgraded and new filters with dual GAC/sand media.

! Washwater reclamation.

! A new vertical turbine pump station.

! A new chlorine scrubber for the new chlorine gas facilities.

! A new backwash clearwell and chlorine contact chamber.

! Seismic upgrade of 10-million-gallon clearwell and other plant facilities.

Carollo designed the upgrades as well as the new processes to fit within the existing, constrained residential site. The project team worked closely with the State Water Board Division of Drinking Water (DDW) to ensure that their concerns were met as the design progressed. When the construction phase was nearing completion, the Carollo team conducted training sessions with the operators so that they would be brought up to speed and feel confident about operating the new facilities. Since the plant is the only source of water for Vallejo, Carollo’s design included special considerations to allow the plant to stay in service during construction.

Carollo successfully delivered the $35-million

Fleming Hill WTP in a residential neighborhood

without interruption of Vallejo’s water supply.

CITY OF VALLEJO, CALIFORNIAFleming Hill Water Treatment Plant Expansion

H I

G H

L I

G H

T S

Water treatment expansion to 42 mgd.

Pre- and intermediate ozonation.

Small challenging site in a residential area.

Facilities kept in service during construction.

Successful resolution of complex delivery/sequencing issues.

ke

y a

ch

iev

em

en

ts

V:\CompanySOQs\Ozonation\Indd\02KeyAchieveOzn.indd12

In the early 1980s, the Town of Gilbert recognized the need to plan for future growth, and that an alternative to pumping groundwater was necessary. At the same time, Arizona enacted the state’s progressive Groundwater Code, which addressed the groundwater overdraft problem and provided a means for allocating Arizona’s limited groundwater resources. In 1984, Gilbert selected Carollo to develop a water resource plan. Four years later, Gilbert passed the water system improvement bond election that authorized the funding for the development of its first water treatment plant. Gilbert retained Carollo to provide planning, design, and construction of the 15-mgd Gilbert WTP.

In a subsequent project, Carollo performed a study to evaluate Gilbert’s current water treatment process and completed design and construction to expand the plant from 15 to 40 mgd. The expansion design included a pilot study to examine ozonation and biological filtration to meet Gilbert’s long-term finished water quality goals. The main objectives of the work were to comply with future regulations, to minimize the public health risk associated with chlorine-resistant microbial pathogens, and to improve the aesthetic quality of water, mostly in terms of taste and odor. Based on the results of the pilot study investigations, Gilbert included ozone for the 30-mgd water treatment plant in the 15-mgd expansion.

Construction of the 15-mgd expansion and new ozone facilities was complete in 2002. In addition, Carollo also reviewed Gilbert’s current master plan to determine if the plant’s ultimate capacity could be increased from 40 to 60 mgd. The results of the study helped town officials determine what improvements/changes were needed to meet Gilbert’s future needs.

Ozonation and biological filtration improved aesthetic and health-related

water quality for the Town of Gilbert, AZ.

TOWN OF GILBERT, ARIZONAGilbert Water Treatment Plant

H I

G H

L I

G H

T S

Client relationship spanning more than 20 years.

Design of new 15-mgd water treatment facility and subsequent

expansion to 40 mgd.

Pilot testing to examine the use of ozone and biological filtration to meet long-term finished water

quality goals.

Design of ozonation facilities.

k e y a c h i e v e m e n t sV:\C

ompa

nySO

Q\sO

zona

tion\

Indd

\02K

eyAc

hiev

eOzn

.indd

13

Carollo recently completed the site master plan and design for the City of Peoria’s new water treatment plant. Carollo also provided construction management with on-site resident engineering services. Construction of this 16-mgd facility was completed in Summer 2002. Phase I of the Greenway WTP design included a 5-milllion-gallon storage reservoir, a finished water pump station, and treatment processes that utilize conventional treatment combined with ozonation and BAF.

The conventional treatment process utilizes chemical addition, rapid-flash mixing, pre- and final sedimentation, and flocculation. Ozone is used as a primary disinfectant with chlorine added as the secondary disinfectant. BAF is added for the reduction of taste and odor. The facility design also provides for finished water storage and pumping, used water recovery, and solids handling.

The facility treats Salt River Project and Central Arizona Project water from the end of the Arizona Canal. The project satisfies many significant statewide goals such as:

! Meeting regulatory requirements.

! Decreasing dependence on groundwater.

! Increasing the use of surface water.

The Greenway WTP satisfies many significant and statewide goals, such as meeting

regulatory requirements, decreasing dependence on groundwater, and increasing

dependence on surface water.

CITY OF PEORIA, ARIZONAGreenway Water Treatment Plant

H I

G H

L I

G H

T S

$2.8 million water treatment facility with a first-phase capacity

of 16 mgd.

Design of conventional treatment in combination with ozonation and

biologically active filtration.

Ozone used as a primary disinfectant and chlorine added as

a secondary disinfectant.

ke

y a

ch

iev

em

en

ts

V:\CompanySOQs\Ozonation\Indd\02KeyAchieveOzn.indd14

Mesa Consolidated Water District (Mesa Water) selected Carollo to prepare design/build plans and specifications for a new treatment facility to remove natural color from groundwater. Carollo prepared a design/build request for proposals package to approximately the 30-percent design level. This package included a number of drawings including conceptual layouts, building requirements, a process flow diagram, a basic SCADA system design, and several detailed process and instrumentation diagrams (P&IDs). Carollo tailored a design criteria report and detailed specifications to meet the client’s specific requirements in terms of equipment and control/monitoring capabilities for the new facility. We also prepared a bidding requirements package specific to the project, which included the contractual forms such as the agreement and the customized design/build conditions of contract.

Based upon our experience with other design/build projects, we prepared design/build documentation which provided for a high level of input by the design/build teams during the bid stage. This enabled Carollo to carry out a detailed evaluation of the bids to ensure that the facility offered by the successful bidder would meet the client’s expectations.

Carollo’s scope of work included the prequalification of suitable design/build teams and major equipment manufacturers acceptable to Mesa Water and facilitated award of the $11-million Phase I contract to the successful design/build team. Our preliminary design effort also included an assessment of nanofiltration as an alternative treatment approach.

Mesa Water retained Carollo to provide engineering services during the final design, construction, and start-up phases of the project. Our scope also included the preparation of an operational plan for the plant, and assistance to Mesa Water in discussions with the DDW to obtain a permit to operate the new facility.

Carollo evaluated ozone and

nanofiltration for removing color from

Mesa Water’s groundwater supply.

MESA CONSOLIDATED WATER DISTRICT, COSTA MESA, CALIFORNIAColored Water Treatment Facility

H I

G H

L I

G H

T S

3,000 ppd ozone capacity.

10 percent ozone concentration from LOX.

Injectors and diffusers for contacting.

Pre-qualification of ozone equipment supplier.

Preparation of design/build plans and specifications.

Carollo prepared design/build

documents and provided final design

and construction-phase services for the

4-mgd project.

k e y a c h i e v e m e n t sV:\C

ompa

nySO

Q\sO

zona

tion\

Indd

\02K

eyAc

hiev

eOzn

.indd

15

CITY OF MANKATO, MINNESOTA

The City of Mankato hired Carollo to assess the challenges that its water treatment facility could face from increasingly stringent water quality regulations and heightened consumer awareness, and to determine existing/emerging technologies to meet or exceed Mankato water customer expectations and increase the treatment capacity. Water treatment challenges included seasonal fluctuations in the levels of nitrates, total organic carbon, and DBP precursors.

The water treatment plant evaluation project involved two phases. Phase 1 consisted of a regulatory analysis and a water treatment plant process evaluation. The regulatory analysis involved a summary of existing and future regulations, an overview of the compliance of the Mankato plant, a comprehensive filter evaluation, and confirmation of the CT available in the on-site reservoir.

Phase 2 involved surveying and evaluating new technologies, including ozone, ultra and/or nanofiltration membranes, and UV disinfection, to determine if they hold promise for future application at the plant. Softened water shipped to Carollo’s water research laboratory provided a basis for developing ozone demand and decay data using Carollo’s unique bench-scale equipment. Carollo presented and discussed the investigative results with Mankato staff in a series of workshops and summarized the findings in a project report which detailed the conclusions, recommendations, and preliminary costs of optimizing the existing facility, increasing plant capacity, and adding other technologies to enhance water quality.Faced with increasingly stringent water

quality regulations and growing public

awareness, Mankato retained Carollo to

recommend alternatives, including ozonation

facilities, to optimize its water treatment plant

and increase capacity.

Water Treatment Plant Evaluation Project

Two-phase water treatment evaluation.

Regulatory analysis.

Evaluation of ozone, ultrafiltration, nanofiltration,

and UV disinfection treatment technologies.

Bench-scale testing at Carollo’s water research laboratory.

H I

G H

L I

G H

T S

ke

y a

ch

iev

em

en

ts

V:\CompanySOQs\Ozonation\Indd\02KeyAchieveOzn.indd16

METROPOLITAN WATER DISTRICT OF SALT LAKE AND SANDY, UTAH

Carollo led the effort to conduct a pilot study for the Metropolitan Water District of Salt Lake and Sandy. The purpose of the study was to evaluate three potential treatment trains for the new 70-mgd Point of the Mountain WTP:

! Treatment Train No. 1. Low-pressure membrane filtration with conventional pretreatment.

! Treatment Train No. 2. Low-pressure membrane filtration and granular activated carbon adsorption with presedimentation.

! Treatment Train No. 3. Ozonation, biologically active filtration, and ultraviolet disinfection with conventional pretreatment.

Carollo conducted bench- and pilot-scale evaluations at a testing facility near the future site of the treatment plant. This involved constructing a metal building for this purpose close to the raw water intake location of the future plant. This dedicated facility housed nine pilot skids and related equipment and included an on-site laboratory and office space for project meetings. Carollo maximized on-site testing capabilities to reduce external analytical costs during piloting.

For the pilot-scale evaluations, Carollo provided a new 7-gpm conventional treatment train, complete with pre-and intermediate-ozonation and six filters, as well as a 100-gpm pretreatment unit for the membrane systems.

Carollo used a combination of bench- and pilot-scale ozone evaluations to optimize testing costs. This involved refining viable ozone operating conditions at the bench-scale, such as dose and contact time, for subsequent pilot-scale tests. Carollo developed design criteria for the ozonation facilities, based on the results of the pilot evaluations.

The piloting effort demonstrated that all three trains achieve the operational and finished water quality goals established for the Point of the Mountain WTP.

Carollo determined that Treatment Train No. 3, which included pre- and intermediate ozonation, would be most cost effective and robust to meet future challenges, such as taste and odor treatment and more stringent DBP goals.

The Point of the Mountain pilot testing facility housed nine

pilot skids, a laboratory, and office space. The building

has been reused by the local fire department.

Point of the Mountain Water Treatment Plant

Ozone evaluations using Carollo’s bench and pilot testing

equipment.

Bench and pilot testing of three treatment trains.

Basis for final design of new 70-mgd treatment facility using pre-and intermediate ozonation biologically-active filtration and

UV disinfection.

H I

G H

L I

G H

T S

k e y a c h i e v e m e n t sV:\C

ompa

nySO

Q\sO

zona

tion\

Indd

\02K

eyAc

hiev

eOzn

.indd

17

Carollo, in association with others, conducted an extensive study to develop the best treatment process to meet future regulations for the proposed Lake Pleasant WTP. The study included both a bench-scale evaluation and pilot studies.

The bench-scale testing included assessment of raw water quality, development of finished water quality goals, and the evaluation of current and future treatment technologies. Focus group meetings with client staff and national experts resulted in recommendations for developing the bench-scale testing program. Bench-scale testing covered pre-oxidation, pretreatment, and advanced treatment processes for several key test waters. Pre-oxidation included ozone, chlorine dioxide, and peroxone. Treatment processes included dissolved air flotation (DAF), ballasted flocculation, and GAC filtration. Advanced treatment processes included a range of presently available membrane options. The team compared these to conventional treatment. The testing focused on two primary parameters: turbidity removal and dissolved organic carbon (DOC) removal. Additional parameters included arsenic removal.

Based on the bench-scale testing, the team developed select treatment options for pilot-scale testing. The key objective of this phase was to narrow the treatment options that would meet the water quality goals and select the best treatment options for the proposed new treatment plant. The result was the construction of a total of six pilot plants.

In addition to the treatment trains at each of the pilot plants, work included feeding effluent from select filter media columns and microfiltration to rapid small-scale column test (RSSCT) equipment to evaluate the effectiveness of GAC post-contactors for TOC removal and bed life. The team also conditioned microfiltration effluent with acid and anti-scalant as a pretreatment for nanofiltration and reverse osmosis testing. Pilot trailer systems allowed short-term pretreatment testing with DAF and ballasted flocculation on Central Arizona Project (CAP) water, algae-spiked CAP water, and high-turbidity CAP water.

The project team completed pilot plant work over the summers of 2000 and 2001. The new Lake Pleasant WTP became operational in 2007.

CITY OF PHOENIX, ARIZONA

A thorough bench-scale test protocol

resulted in significant cost savings by

reducing the alternatives and length of the

pilot testing.

Lake Pleasant Water Treatment Plant

Bench- and pilot-scale testing of numerous treatment scenarios

to select the best treatment alternative.

Bench-scale testing of pre-oxidation including ozone,

chlorine dioxide, and peroxone.

Focus group meetings with client staff and national experts

to determine best testing program.

H I

G H

L I

G H

T S

k e y a c h i e v e m e n t sV:\C

ompa

nySO

Q\sO

zona

tion\

Indd

\02K

eyAc

hiev

eOzn

.indd

18

Colorado Springs Utilities selected Carollo, teamed with a national contractor, to design and construct the new 50-mgd Southern Delivery System WTP. A progressive design-build alternative delivery approach is being used. The process includes conventional pretreatment, intermediate ozone, biological filtration, and support facilities, including a raw water tank, finished water tank and pump station, and all required chemical facilities.

The intermediate ozone process is designed to apply a maximum dose of 1.5 mg/L, primarily for the control of taste and odor causing compounds. The system will utilize injection equipment to dissolve up to 650 pounds per day of ozone into a small side-stream flow of settled water that is then flash mixed into the overall process stream. The total process flow then enters two ozone contact chambers that provide a minimum of 10 minutes of hydraulic contact time, designed with a dual level, end around baffle design that will provide an estimated T10/t of 0.65.

This design-build project will be completed by July 2012. Construction is planned to begin in late 2012 or early 2013.

COLORADO SPRINGS UTILITIES, COLORADO

This 3-dimensional (3D) rendering shows the main process facility at the Southern Delivery

System WTP. This facility will include conventional pretreatment, ozone, filtration, chemical

storage and feed, and maintenance and administration facilities.

Southern Delivery System Water Treatment Plant

All design for this fast-paced design-build project is being

performed using 3D CAD

Value engineering was incorporated in all phases

of design

Ozone will enhance the effectiveness of the biologically-

active GAC filters

H I

G H

L I

G H

T S

k e y a c h i e v e m e n t sV:\C

ompa

nySO

Q\sO

zona

tion\

Indd

\02K

eyAc

hiev

eOzn

.indd

19

Changes to regulations with respect to the D/DBPR resulted in the City of Santa Barbara evaluating alternative treatment processes for the reduction of DBP precursors. The 37-mgd William B. Cater WTP utilized free chlorine for pre-oxidation for proper sedimentation and filtration and wanted to maintain the practice of free chlorine as a residual disinfectant. Subsequent fires in the watershed increased raw water TOC levels by 50 percent and necessitated the use of powder activated carbon (PAC) for TOC removal. Bench- and pilot-scale testing had shown that ozone and pH reduction could significantly reduce DBP levels to meet the changing regulations and water quality goals.

Carollo completed the design for a new ozone facility as part of the Advanced Treatment Solutions project that included a 13,000-gallon LOX storage tank and vaporizers, two 630-ppd generators that produce ozone at concentrations up to 12 percent by weight, side-stream injection into a 42-inch raw water pipe, and a 10-minute ozone contactor. The ozone contactor was designed in an under-over configuration that utilized available space to provide a more hydraulically efficient ozone contactor.

Carollo also worked with City agencies, such as the Planning Commission and Architecture Board of Review, and local home owners to minimize impacts of the new facilities. In addition, the State of California requested a fast-track schedule to allocate unused State Revolving Funds before the end of the fiscal year.

The design also included a new carbonic acid storage and feed system, new chemical feed and storage for caustic soda, sludge thickening, and mechanical dewatering facilities.

CITY OF SANTA BARBARA, CALIFORNIAAdvanced Treatment Technologies for the Cater Water Treatment Plant

Bench- and pilot-scale testing of treatment alternatives for

DBP reduction.

Evaluated selected alternatives based on impact of a fire

in local watershed.

Coordination with home-owners and City agencies to design a 630-ppd ozone feed and

contacting facility.

H I

G H

L I

G H

T S

ke

y a

ch

iev

em

en

ts

V:\CompanySOQs\Ozonation\Indd\02KeyAchieveOzn.indd20

Central Utah Water Conservancy District selected Carollo to provide engineering services for the Process Improvement Project at the Utah Valley WTP (UVWTP). The UVWTP is an 80-mgd direct filtration plant that has plans to expand to 120 mgd in the future. Water quality challenges and changing regulations required the plant to evaluate alternative methods for TOC removal to lower subsequent DBPs. Bench- and pilot-scale testing has shown that ozone and/or enhanced coagulation can adequately remove TOC to significantly reduce subsequent DBPs to meet treatment goals and water quality regulations.

Design components of the ozone facility include a 13,000-gallon LOX storage and vaporization system, three 590-ppd generators, side-stream injection system, two 12-minute ozone contactors with associated destruct units, and chemical storage and feed for ozone quenching. The facility will provide provisions for future expansion to 120 mgd as well as considerations for ozone augmented biofiltration. The scope of work also included pre-selection of an ozone system supplier to facilitate in the design of the facilities. Challenges of the project included site constraints that required addition of the new ozone facilities, additional flocculation and new

sedimentation basins while maintaining space for future expansion.

Other design efforts included hydraulic evaluation and improvements to plant filters, modifications to the waste washwater and filter-to-waste handling facilities, upgraded chemical feed and storage areas, and solids handling facilities.

In addition to preliminary and final design services, Carollo will provide assistance for pre-selection of contractors and bidding, as well as engineering services for construction and startup phases of the project.

CENTRAL UTAH WATER CONSERVANCY DISTRICT, OREM, UTAHProcess Improvements Project at the Utah Valley Water Treatment Plant

Coordination of District bench- and pilot-scale testing to

evaluate treatment alternatives to improve water quality and

plant performance.

Optimization of ozone dosing requirements to minimize new

solids handling facilities.

Incorporated existing facilities in challenging site constraints to

allow for future expansion to 120 mgd.

Design of new ozone feed and contacting facilities for DBP reduction and taste and odor control.

H I

G H

L I

G H

T S

Design components of the Central Utah Water Conservancy District's

ozone facility at the Utah Valley WTP include a 13,000-gallon LOX

storage and vaporization system, three 590-ppd generators,

side-stream injection system, two 12-minute ozone contactors

with associated destruct units, and chemical storage

and feed for ozone quenching.

t e s t i n g a n d o p t i m i z a t i o n c a p a b i l i t i e s V:\C

ompa

nySO

Qs\O

zona

tion\

Indd

\03t

est&

OptC

apOz

n.in

dd

21

Metropolitan Water District of Salt Lake and Sandy

Central Utah Water Conservancy District

Weber Basin Water Conservancy District

City of PhoenixCity of tucson

United Water Missouri

town of Gilbert (2)

Star Sewer and Water District

City of Vallejo (2)

City ofSanta Barbara

Shoreline Water District

City of Mankato

City of Appleton

U.S. Army Corpsof engineers

tampa Bay Water

Upper trinity Regional Water District

Pilot-scaleBench-scale

City of Arlington

Southern nevada Water Authority

The Carollo Research Group (CRG), founded in 1997, provides research, process evaluation, and plant optimization services. Early in the design process, the CRG often performs testing to develop design criteria for new treatment facilities. The CRG also conducts evaluations as part of our applied research projects that are funded by associations such as the Water Research Foundation.

The CRG combines the use of bench- and pilot-scale testing capabilities to meet the specific objectives of each study. We have developed a flow-through bench-scale ozone contactor and a modular 10-gpm pilot-scale ozonation skid to collect data representative of full-scale processes in the most efficient manner.

COntInUOUS-FLOW BenCH-SCALe OZOne SYSteMThe information required to develop design criteria for ozone facilities includes ozone demand, ozone decay, and screening of ozone application points. Traditionally, this information has been developed using pilot-scale facilities, semi-batch bench-scale testing units, or modeling techniques. The major drawbacks of ozonation pilot studies include the tendency to overestimate the hydraulic efficiency and the

Carollo bench- and pilot-scale studies

involving ozonation.

tes

tin

g a

nd

op

tim

iza

tio

n c

ap

ab

ilit

ies

V:\CompanySOQs\Ozonation\Indd\03test&OptCapOzn.indd22

Carollo's continuous-flow bench-scale ozone system

easily simulates a wide range of water quality and

operating conditions.

high cost and time commitment required to mobilize the equipment. Semi-batch reactors and the use of mathematical models do not provide sufficiently reliable data for extrapolation to full-scale design.

To address these drawbacks, Carollo has developed a continuous-flow bench-scale ozone testing unit which combines the reliability of pilot-scale testing and cost-effectiveness of bench-scale methods.

This testing unit offers several benefits, including:

Providing data representative of full-scale ozone systems. !

Determining key design parameters using a 5-gallon sample. !

Offering quick mobilization (half day) to allow ozone treatment !

options to be evaluated for transient water quality episodes.

Easily simulating a wide range of water quality and operating !

conditions.

PILOt-SCALe OZOne SKID

Carollo's pilot-scale ozone skid may be operated independently or easily integrated with other skids to evaluate the impact of ozonation on other treatment processes. This type of skid is generally used to evaluate intermediate ozonation.

The skid comes fully equipped for complete ozone evaluations and includes the following components:

Air compressors to provide feed gas. !

Complete air preparation, including drying and filtration. !

Ozone generation equipment. !

Ozone contacting. !

Ozone quenching. !

Off-gas ozone destruction. !

Instrumentation and control. !

Major benefits of this pilot-scale ozone skid include the ability to:

Mimic full-scale hydraulics, allowing for ozone demand, !

disinfection assessment, and by-product formation testing.

Offer capacity for a wide range of ozone !

dosages.

Quench residuals using a quenching agent, such as calcium !

thiosulfate.

Destroying ozone in the off-gas using an integrated ozone destruct !

unit.Carollo's modular 10-gpm ozone skid

efficiently collects data representative of

full-scale processes.

p u b l i c a t i o n sV:\C

ompa

nySO

Qs\O

zona

tion\

InDe

sign

\04P

ublic

atio

nsOz

n.in

dd

23

select ozone and alternative oxidant Publications - Peer-reviewed1 Crozes, G.F., White, P.C., Bench, B.L., and Hagstrom, J.P. “Evaluation of Ozone for Cryptosporidium

Inactivation and Atrazine Oxidation in a Lime Softening Plant,” Ozone Science and Engineering. Volume 20. No. 3. 1998.

select ozone and alternative oxidant Publications/Presentations - other1 Mackey, E., Suffett, M., and Gillogly, T. “The Decision Tool for T&O Control.” Proceedings of the

American Water Works Association 2011 Florida Section Fall Conference, Orlando, FL, November 27-December 1, 2011.

2 Gillogly, T.E.T. “Treatments Used for T&O Control.” Proceedings of the American Water Works Association 2011 Water Quality Technology Conference, Phoenix, AZ, November 13-17, 2011.

3 Dunahee, N, Zacheis, G.A., Boulous, L, and Kimbrough, D. “Electrolysis, Bromide Removal, and Ozonation: The Impact of Bromate Formation in Drinking Water.” Proceedings of the American Water Works Association 2010 Water Quality Technology Conference, Savannah, GA, November 17, 2010.

4 Lauderdale, C., and Joost, R. “Enhancing Ozone-Biofiltration Hydraulic Performance & Treatment Efficiency with Low-Level Phosphorus Supplementation.” Proceedings of the International Ozone Association Pan American Group Annual Conference, September 2010.

5 Dunahee, N. and Zacheis, G.A. “Evaluating Bromate Mitigation Strategies for High Bromide Waters.” Presented at the American Water Works Association Kansas Section Conference, August 2010.

6 Domonoske, A., Olson, G. “Ozone Sidestream Injection: Solving Start-Up Problems Using Underwater Video And Engineering Creativity at Point of the Mountain WTP.” ACE 2010, Chicago, IL, June 2010.

7 Domonoske, A., Rogers, C. “Latest Trends in Drinking Water Ozonation.” 12th Annual Utah Water Quality Alliance Retreat, Salt Lake City, UT, May 27, 2010.

8 Gillogly, T., Crofts, B., Gregory, M., “The Quail Creek WTP: A Comprehensive Multi-Barrier Approach to Mitigating Tastes and Odors.” Proceedings of the International Water Association Off-Flavours Symposium, Daejeon, Korea, October 5-9, 2008.

9 Gillogly, T., Gregory, M., Crofts, B., Rogers, C., “From the Reservoir to Your Residence - A Multi-Barrier Approach to Protect the Community from Tastes and Odors.” Paper presented at the American Water Works Association 51st Annual Intermountain Section Conference, St. George, UT, September 10, 2008.

, I ~

I I

-----------je

pu

bli

ca

tio

ns

V:\CompanySOQs\Ozonation\InDesign\04PublicationsOzn.indd24

10 Booth, S., Suffet, I. H., Newcombe, G. and Crozes, G. “Setting Drinking Water Taste and Odor Treatment Goals: International Case Studies.” Paper presented at the 7th International Water Association Specialty Symposium on Off-Flavours in the Aquatic Environment, Cornwall, Ontario, Canada, October 2-7, 2005.

11 Domonoske, A. “An Innovative Ozone Contactor for the Point of the Mountain WTP.” Presentation at the American Water Works Association 48th Annual Intermountain Section Conference, St. George, UT, September 2005.

12 Gillogly, T.E.T. “Tastes and Odors: How Do I Get Rid of Them?” Paper presented at the 20th Annual Water Awareness Day, Glendora, CA, March 22, 2005.

13 Crozes, G.F., Cushing, R.S., Rennecker, J.L., Cleveland, C.T., and Wright, H.B. “Synergies of UV Disinfection and Ozone in Water Treatment.” Paper presented at the International Ultraviolet Association 2003 Annual Conference, Vienna, Austria, July 9-11, 2003.

14 Crozes, G.F. “The Weber Basin WTP: A Case History of the Integrated Use of Ozone, Biologically Active Filtration & UV.” Proceedings of the American Water Works Association 2003 Annual Conference & Exposition, Anaheim, CA, June 15-19, 2003.

15 Thomson, D., Hatcher, M., Jabari, E., and Gillogly, T.E.T. “Evaluation of Chlorine Dioxide Pre-Oxidation and Intermediate-Ozone at the Robert A. Perdue Water Treatment Plant.” Poster presented at the American Water Works Association 2003 Annual Conference & Exposition, Anaheim, CA, June 15-19, 2003.

16 Braghetta, A., Gillogly, T.E.T., Brownawell, B., and Benotti, M. “Removal of Pharmaceuticals and Endocrine Disrupting Compounds Through Advanced Wastewater Treatment Technologies.” Proceedings of the American Water Works Association 2002 Water Quality Technology Conference, Seattle, WA, November 10-13, 2002.

17 Anderson, R.D., Bundy, M.M., and Hunsaker, R.N. “National Trends in Tropospheric Ozone.” Poster presentation at the Air & Waste Management Association 2001 Annual Conference, Orlando, FL, June 2001.

18 Gillogly, T.E.T., Minear, R., Amy, G., Marinas, B., Andrews, R., and Croue, J.P. “Bromate Formation and Control During Ozonation of Low-Bromide Waters.” Proceedings of the American Water Works Association 2001 Annual Conference & Exposition, Washington, D.C., June 17-21, 2001.

19 Crozes, G. “Integrating Plant Operations for UV, Ozone, and Membranes.” Presented at the American Water Works Association 2001 Pacific Northwest Section Conference, Yakima, WA, May 2-4, 2001.

20 Gillogly, T.E.T., Najm, I., Minear, R., Marinas, B., Urban, M., Kim, J.H., Echigo, S., Amy, G., Douville, C., Daw, B., Andrews, R., Hofmann, R., and Crouse, J.-P. “Bromate Formation and Control During Ozonation of Low Bromide Waters.” Water Research Foundation, Denver, CO. 2001.

--Of--------

c o m p a n y p r o f i l eV:\C

ompa

nySO

Qs\O

zona

tion\

Indd

\05C

omPr

ofOz

n.in

dd

25

UsmapWaterProj-CoProf-Blue.ai (Text list for this map is on V:\CompanySOQs\GeneralWtr&WWSOQ\Sections\03WtrTreatment\CaliforniaWaterMap.doc)

Carollo has engineered water

projects across the country.

WATER AND WASTEWATER EXPERTS

Carollo is an environmental engineering firm specializing in the planning, design, and construction of water and wastewater facilities and infrastructure. Carollo’s reputation is based upon client service, a continual commitment to quality, and technical leadership.

During our 86-year history, Carollo has successfully completed more than 25,000 projects for public sector clients. Carollo is currently ranked within Engineering News Record's top 500 design firms. More importantly, ENR’s annual Source Book ranks Carollo among the top 10 firms for water and wastewater treatment plant design. Unlike many of our competitors, Carollo provides only water and wastewater engineering services.

With our focus on water and wastewater, we recruit nationwide and hire technical staff who have the extensive background and training specific to this field. For that reason, the quality and professional standing of our core group of water and wastewater professionals equals or exceeds that provided by some of the largest engineering firms in the U.S.

Resources

Carollo’s staff numbers more than 1,050 employees,

including more than 500 registered engineers. We

are a full-service water and wastewater engineering company with the experience and qualified

professionals to successfully manage projects of any size. Our staff includes

civil, sanitary, electrical, environmental, mechanical, chemical, structural,

instrumentation, and corrosion control engineers, as well as

architects, planners and specialists in other areas. These individuals perform work solely on water and wastewater related facilities.

Carollo is currently

ranked within Engineering

News Record's top 500 design

firms . . . ENR's annual Source

Book ranks Carollo among the

top 10 firms for water

and wastewater treatment

plant design.

co

mp

an

y p

rofi

le

V:\CompanySOQs\Ozonation\Indd\05ComProfOzn.indd 26

Carollo’s state-of-the-art computer

network allows us to effectively

communicate between offices and

interface with almost any engineering

software on the market today.

MANAGEMENT PHILOSOPHYCarollo’s management philosophy and the success of our company are founded on simple precepts:

! Seek out, hire, and hold onto the best people in the business. We recognize that the most critical element for a successful project is the project team. Carollo aggressively recruits the top candidates from the leading engineering schools across the country. We train and mentor these engineers

to become the next generation of leaders for Carollo and the industry. This long-term

commitment to developing excellent engineers has resulted in a depth of talent unmatched by other

consulting firms.

! Specialize in the planning, design and construction management of water and wastewater projects. This is our business. Our success hinges solely upon our ability to provide responsive service to our municipal clients.

! Commit our partners to an active role in every project. This provides our clients with top management interest, clear accountability, responsiveness, and talent—and helps to ensure that the necessary staff and resources are committed to each assignment.

! Focus on client service. Carollo knows the value of listening to our clients and recognizes that successful projects result from the combined expertise of our staff and the client’s staff. This commitment to understanding client needs and valuing their input is one of the cornerstones of Carollo’s success.

LEADERS IN WATER ENGINEERING

Carollo has provided design and construction management services for more than 100 water treatment plants with a total capacity of more than 3.5 billion gallons per day, more than 1,000 miles of water pipeline ranging in size from 6 to 108 inches in diameter, and more than 100 water pumping stations with capacities as high as 600 mgd. We have recently completed or are performing ongoing water projects for many of the country’s major municipalities or special districts. A few examples of Carollo’s achievements include:

! Conceiving and developing the custom design approach for low-pressure membrane water treatment plant design. Carollo developed our own custom, nonproprietary, non-packaged pilot plant unit, which has been successfully tested in Kansas City, MO.

Carollo provides only water

and wastewater engineering

services, resulting in a level of

understanding of key project issues

that few can match.

c o m p a n y p r o f i l eV:\C

ompa

nySO

Qs\O

zona

tion\

Indd

\05C

omPr

ofOz

n.in

dd

27

! Engineering the fast-paced design/build expansion of the Palm Coast, FL, reverse osmosis (RO) water treatment plant from 3.2 to 9.6 mgd. Carollo completed preliminary design and obtained all permits just eight weeks after beginning work to help facilitate successful completion of this project in just 15 months.

! Conducting the first U.S. testing and evaluation of electrodialysis reversal (EDR) for perchlorate treatment.

! Achieving leadership in ultraviolet (UV) disinfection, first for wastewater applications in the western United States and now for UV drinking water applications. Carollo was the primary author of the USEPA UV Disinfection Guidance manual. We also developed and operate the world's largest UV validation facility in Portland, OR.

! Designing the preozonation and intermediate ozonation at two water treatment facilities for the City of Arlington, TX, using our computational fluid dynamic (CFD) modeling to optimize ozone contactor design. Carollo also conducted a joint research project with various utilities in the Phoenix, AZ, area to evaluate ozonation and biological filtration to meet long-term finished water quality goals, leading to design and construction of ozonation facilities in Gilbert and Peoria, AZ.

! Designing, in a joint venture, the world’s largest ozone generation system at a water treatment facility in Las Vegas, NV.

FORMULA FOR SUCCESS

Much of our success as an industry leader is based on our ability to offer advanced solutions that are practical, affordable, and reliable. We strive to maximize the use of existing infrastructure whenever possible, promote environmental conservation, and make the best technologies available at a competitive cost.

A major factor in maintaining Carollo's ability to integrate new technology is the Carollo Water Research Group (CWRG). The relationship between our design engineers and the CWRG is unique in the industry and serves as a company-wide resource for evaluating water quality and treatability data, performing pilot studies, developing design criteria, tailoring design solutions to water quality issues, and addressing regulatory compliance concerns.

Our firm takes pride in the large number of clients with whom we have maintained continuing working relationships. We have worked with some clients for more than 80 years—a clear indication of the quality of our

Our client list includes the following:

! City of Phoenix, AZ

! East Bay Municipal Utility District, Oakland, CA

! Metropolitan Water District of Southern California

! Sacramento Regional County Sanitation District, CA

! City of San Diego, CA

! City and County of San Francisco, CA

! City of Sacramento, CA

! Denver Water Department, CO

! City of Minneapolis, MN

! Kansas City, MO

! City of St. Louis, MO

! City of Las Vegas, NV

! Southern Nevada Water Authority, NV

! City of Arlington, TX

! City of Austin, TX

! Upper Trinity Regional Water District, TX

Carollo designed the 624-mgd Alfred Merritt Smith Water

Treatment Plant ozone contactor for the Southern Nevada Water

Authority. It was the world's largest ozone system at a water

treatment facility when it first came on-line.

co

mp

an

y p

rofi

le

V:\CompanySOQs\Ozonation\Indd\05ComProfOzn.indd 28

work, our control of costs, and our ability to meet schedules. This dedication to quality has resulted in a long list of successful projects and satisfied clients, some of which are highlighted in the table below.

Client/Project

Southern Nevada Water Authority, Las Vegas, Nevada - Southern Nevada Water System Improvements Project

624 l l l l l

Metropolitan Water District of Southern California - Weymouth WTP 520 l l l l

City of Phoenix, Arizona - Val Vista Water Treatment Plant 220 l l l l

City of Fort Worth, Texas - Holly Water Treatment Plant 210 l l l l

City of Phoenix, Arizona - Union Hills Water Treatment Plant 160 l l l l

Dallas Water Utilities, Texas - Bachman Water Treatment Plant 160 l l l l

City of Sacramento, California - E.A. Fairbairn Water Treatment Plant 160 l l l l

City of Sacramento, California - Sacramento River Water Treatment Plant

160 l l l l

Metropolitan Water District of Salt Lake and Sandy, Utah - Point of the Mountain Water Treatment Plant

150 l l l l l l

City of Oklahoma City, Oklahoma - Draper Water Treatment Plant 150 l l l l

East Bay Municipal Utility District, California - Walnut Creek Water Treatment Plant

120 l l l l l

Santa Clara Valley Water District, California - Santa Teresa Water Treatment Plant

100 l l l l

City of Arlington, Texas - John F. Kubala Water Treatment Plant 97.5 l l l l

Santa Clara Valley Water District, California - Rinconada Water Treatment Plant

75 l l l l

City of Arlington, Texas - Pierce-Burch Water Treatment Plant 68 l l l l

Santa Clara Valley Water District, California - Penitencia Water Treatment Plant

42 l l l l

City of Vallejo, California - Fleming Hill Water Treatment Plant 42 l l l l l

Town of Gilbert, Arizona - Gilbert Water Treatment Plant 30 l l l l

City of Peoria, Arizona - Greenway Water Treatment Plant 16 l l l l l

Upper Trinity Regional Water District, Texas - Tom Harpool Water Treatment Plant

16 l l l

Brazos River Authority, Texas - Brazos River Authority Water Treatment Plant

15 l l l

City of Lake Forest, Illinois - Lake Forest Water Treatment Plant 14 l l l l

City of Neenah, Wisconsin - Neenah Water Treatment Plant 12 l l l l

United Water Missouri - United Water Missouri Treatment Plant 8 l l

City of South Bend, Washington - South Bend Water Treatment Plant 2 l l l

Representative Water Treatment Projects Cap

acity

(m

gd)

Con

vent

iona

l Tre

atm

ent

Mem

bran

esO

zone

UV D

isin

fect

ion

Aut

omat

ion

Solid

s H

andl

ing

Che

mic

al H

andl

ing

Project Elements

carollo.com