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NEIL GEEVERS, SENIOR PROGRAM MANAGER RON DIELHOF, PROJECT ENGINEER / PROCESS MANAGER

LONE STAR HARBOR SAFETY COMMITTEE, DREDGING SUBCOMMITTEE, HOUSTON, TX

JUNE 2, 2015

INTRODUCTION OF BOSKALIS ENVIRONMENTAL

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INDEX

01 OUR HISTORY

02 OBJECTIVES

03 IMPLEMENTATION PHILOSOPHY

04 TECHNOLOGY

05 NORTH AMERICAN EXPERIENCE

06 BENEFICIAL RE-USE FOX RIVER

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INTRODUCTION 1979: Dolman bv founded by Mr. Johan Dolman

1990: Acquired and incorporated as Boskalis Dolman

Working internationally under the brand name Boskalis Environmental

In the US we work under the following entities:

− SECI: Stuyvesant Environmental Contracting LLC

Princeton, NJ office

− SPRI: Stuyvesant Projects Realization Inc.

Fox River project, Green Bay WI

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INDEX

01 OUR HISTORY

02 OBJECTIVES

03 IMPLEMENTATION PHILOSOPHY

04 TECHNOLOGY

05 NORTH AMERICAN EXPERIENCE

06 BENEFICIAL RE-USE FOX RIVER

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THE OBJECTIVE OF SEDIMENT MANAGEMENT IS TO MINIMIZE

THE CONTAMINATED VOLUME DISPOSED OF AT THE LANDFILL BY

RE-USE OF THE SEPARATED COARSE FRACTIONS (SAND + GRAVEL)

AND BY DEWATERING OF THE FINE (CONTAMINATED) FRACTION.

OBJECTIVES

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INDEX

01 OUR HISTORY

02 OBJECTIVES

03 IMPLEMENTATION PHILOSOPHY

04 TECHNOLOGY

05 NORTH AMERICAN EXPERIENCE

06 BENEFICIAL RE-USE FOX RIVER

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1. REGIONAL APPROACH

Established Regional Locations

> 30 years and 15 million tons experience

> 10 million tons re-used 2. PROJECT SPECIFIC DESIGN

Sampling & Treatability/Feasibility Study

In-house Engineering & Design

Construction

Operation & Maintenance 3. COMPATIBLE WITH OTHER REMEDIAL TECHNOLOGIES

(STABILIZATION, THERMAL)

IMPLEMENTATION PHILOSOPHY

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Acc

epta

nce

Sto

rage

P

roce

ss

Separation

Testing R

e-use

Regional Soil Management Facility

REGIONAL MANAGEMENT FACILITIES

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PLANT OPTIONS: MOBILE OR FIXED

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INDEX

01 OUR HISTORY

02 OBJECTIVES

03 IMPLEMENTATION PHILOSOPHY

04 TECHNOLOGY

05 NORTH AMERICAN EXPERIENCE

06 BENEFICIAL RE-USE FOX RIVER

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TECHNOLOGY

MOBILE PROCESSING PLANT

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TECHNOLOGY

PLANT INPUT (SOILS)

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TECHNOLOGY

PLANT INPUT (SEDIMENTS)

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TECHNOLOGY

PRE-CONDITIONING FRACTION (3cm- 30cm)

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TECHNOLOGY

PRE-CONDITIONING (FRACTION 3 - 20mm)

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TECHNOLOGY

SAND SEPARATION (FRACTION 0.063 - 3mm)

(negative pressure)

Sand

Fines

0-0.063mm

Inlet

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TECHNOLOGY

SEPARATED SAND (FRACTION 0.063 - 3mm)

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TECHNOLOGY

DEWATERING FINES (FRACTION < 0.063mm)

Slurry Added PE Settled sediment

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INDEX

01 OUR HISTORY

02 OBJECTIVES

03 IMPLEMENTATION PHILOSOPHY

04 TECHNOLOGY

05 NORTH AMERICAN EXPERIENCE

06 BENEFICIAL RE-USE FOX RIVER

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NORTH AMERICAN EXPERIENCE Miami River Fox River (OU 2 – 5) Passaic River Phase 1

Location Miami, Florida (USA) Green Bay, Wisconsin (USA) Newark, New Jersey (USA)

Time frame 2004 – 2008, in 2 phases, about 1 year total operation

Construction 2008-2009 Started 2009 and ongoing

Construction 2011, Remediation Spring 2012

Duration ~ 1 year ~ 9 years 80 days operational

Purpose Maintenance Dredging Cleanup Cleanup

Contaminants of Concern Heavy Metals (Arsenic) PCB’s Dioxin

Volume ~ 720,000 cy ~ 4,500,000 cy ~ 40,000 cy

Production Rates 1,750 CY per day 4,000 CY per day 500 CY per day

Operational schedule 24/7 Operation 24/5 Operation 12/6 Dredging and preconditioning, 24/6 Dewatering

Dredging Mechanical Dredging Hydraulic Dredging Mechanical Dredging in Enclosure

Processing Standardized Mobile Plant Purpose built Fixed Plant Purpose built (mobile) Plant

Dewatering Belt Filter Presses Membrane P & F Presses Membrane P & F Presses (mobile)

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• DREDGING AND PROCESSING OF 540,000 m3 SEDIMENT FROM MIAMI RIVER

• CAPACITY: >1,500 IN-SITU m3 /DAY

• MASS BALANCE

• 52% sand (0.063 - 3mm)

• 24% filter cake (< 0.063mm)

• 19% coarse material (20mm - 30cm)

• 5% fine material (3 - 20 mm)

• 70% OF MATERIAL RE-USED

• SEDIMENTS CONTAMINATED WITH HEAVY METALS (ARSENIC)

MIAMI RIVER (2005 & 2008)

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PASSAIC RIVER – PHASE I (2012)

• DREDGING AND PROCESSING OF 40,000 CY SEDIMENT FROM PASSAIC RIVER (30,500 m3)

• HIGHLY CONTAMINATED SEDIMENT (“HOT SPOT” CLEAN UP)

• 80 DAYS TIME LIMIT

• CAPACITY: 500 IN-SITU CY/DAY (380 m3 /DAY)

• MAIN CONTAMINATION:

• 2,3,7,8 - tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD), (Agent Orange)

• PCBs

• Mercury

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FOX RIVER CLEANUP:

• 13 MILES (21 KM) OF RIVER

• 4.5 MILLION CUBIC YARDS OF SEDIMENT (3.4 Mm3)

• CAPACITY: 4,000 IN-SITU CY/DAY (3,000 m3 /DAY)

• SEDIMENTS CONTAMINATED WITH PCBs

• DREDGING, SEDIMENT MANAGEMENT, CAPPING, AND WATER TREATMENT IN COOPERATION WITH TETRA TECH EC & JF BRENNAN

• INTEGRATED PROJECT: SEDIMENT CHARACTERIZATION, SEDIMENT TREATMENT, TRANSPORT & DISPOSAL AND BENEFICIAL RE-USE OF SAND

FOX RIVER (2009 – ONGOING)

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INDEX

01 OUR HISTORY

02 OBJECTIVES

03 IMPLEMENTATION PHILOSOPHY

04 TECHNOLOGY

05 NORTH AMERICAN EXPERIENCE

06 BENEFICIAL RE-USE FOX RIVER

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BENEFICIAL RE-USE FOX RIVER

RECOVERED SAND MEETS RE-USE CRITERIA

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PROJECT TEAM

Client Lower Fox River Remediation LLC

Engineering Design & Construction Tetra Tech

Dredging & Capping J.F. Brennan Co., Inc.

Desanding & Dewatering Stuyvesant Projects Realization Inc., affiliate of Boskalis Dolman

Anchor QEA, LLC assist with design

URS assist with modeling

Numerous local construction subcontractors

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PROCESSING SINGLE STREAM

PROCESS

101,000 FILTER CAKE

DROPS (TO DATE), 587

DROPS PER WEEK (24/5)

1.8M TONS FILTER CAKE

+350,000 TONS SAND

IN A 6 ACRE BUILDING

AIR QUALITY

CONDITIONED

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PROCESSING The Process is a 3 phase treatment system

1) Pre-conditioning

2) Sand separation and polishing for beneficial reuse, two sand fractions are separated

3) Mechanical dewatering

Pictures:

Top left : ¼” prescreening

Top right : hydro-cyclones

Bottom left : upstream classifier

Bottom right : dewatering screen

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WHY SEPARATING THE SAND FRACTION? • VARIOUS BENEFICIAL REUSE OPPORTUNITIES

• AVOID CONSUMING LANDFILL SPACE

• AVOID UNNECESSARY EXPENSE FOR T&D AS WASTE

• PREVENT ADDITIONAL WEAR AND TEAR ON DOWNSTREAM

PROCESS EQUIPMENT

• REDUCE THE DEWATERING CYCLE TIME FROM NOT HAVING

TO PROCESS THE SAND

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SEPARATED SAND QUANTITIES (SO FAR)

• ~ 30,000 TONS OF SAND IN 2009 • ~ 70,000 TONS OF SAND IN 2010 • ~ 25,000 TONS OF SAND IN 2011 • ~ 55,000 TONS OF SAND IN 2012 • ~ 75,000 TONS OF SAND IN 2013 • ~ 100,000 TONS OF SAND IN 2014

Recovered sand outside of processing

facility

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EXAMPLE OF SAMPLING PROTOCOL* • Fine & coarse sand sampled once every 1,000 cy for the first

10,000 cy

• Then one sample per 10,000 cy for 10,000 to 50,000 cy

• Then one sample per 50,000 cy thereafter

* Local legislation will define the Sampling Frequency and the Sampling Protocol

Besides chemical compliance with local requirements, the geotechnical properties will also have to meet local requirements in order to be able to re-use the materials. (e.g. Particle Size Distribution, Organic Content, Compaction, etc)

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BENEFICIAL REUSE PROCESS • PREPARE AND SUBMIT LOW HAZARD WASTE EXEMPTION REQUEST NAMING

SPECIFIC OFFSITE PROJECTS (*ONE REQUEST PER PROJECT)

• PUBLIC WORKS PROJECTS ARE PREFERRED

• ADDRESS WDNR COMMENTS TO THE REQUEST

• PARTICIPATE IN PUBLIC MEETING CONCERNING THE REQUEST

• FINALIZE COMMERCIAL ARRANGEMENTS

• PROVIDE APPROPRIATE TEMPORARY EROSION CONTROLS AT THE BENEFICIAL REUSE SITE

• TRACK AND REPORT ON SAND SHIPPED FOR BENEFICIAL REUSE.

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WIN – WIN FOR 2 MAJOR REGIONAL PROJECTS

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BENEFICIAL RE-USE

RE-USE IN INFRASTRUCTURE PROJECTS

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Thank you for your attention!