Technology OverviewTechnology Overview•• Integrated, synergisticIntegrated, synergistic technology suitetechnology suite•• Contaminated soil and groundwaterContaminated soil and groundwater•• ARTART Integrated Remediation System Integrated Remediation System ––

proprietary PATENTED technologyproprietary PATENTED technology•• Minimal site impactMinimal site impact•• Expedite site closure Expedite site closure •• Utilizes proven technologiesUtilizes proven technologies

IIntroducingntroducingART ART Integrated Remediation Integrated Remediation SystemSystem

•• InIn--well Air Stripping well Air Stripping •• InIn--well Air Spargingwell Air Sparging•• Soil Vapor ExtractionSoil Vapor Extraction•• Bioremediation/OxidationBioremediation/Oxidation•• Dynamic Subsurface CirculationDynamic Subsurface Circulation™™•• PlusPlus,, UV & Ozone InjectionUV & Ozone Injection

proprietary proprietary -- patentedpatented

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Air SpargingAir Sparging

VaultVault

GradeGrade

SoilSoil VVaporapor ExtractionExtraction

InIn--Well Air StrippingWell Air Stripping

Pum

pPu

mp

Simplified Simplified System System DiagramDiagram

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SSpargingparging

Groundwater level from Groundwater level from sparging sparging and and vacuumvacuum

Groundwater level from Groundwater level from sparging sparging

EffectsEffects

Cleaner, low density Cleaner, low density waterwater

Cleaner, low density Cleaner, low density waterwater

VaultVault

GradeGrade

Soil Soil VVapor Extractionapor Extraction

Air Stripping/Hydraulic DeliveryAir Stripping/Hydraulic Delivery

Pum

pPu

mp

Negative GradientNegative Gradient Negative GradientNegative Gradient

Dynamic Dynamic Subsurface Subsurface

CirculationCirculation™™

AmendmentsAmendments

AmendmentsAmendments

Installation PhotosInstallation Photos

Installation PhotosInstallation Photos

New Jersey BTEX DemoNew Jersey BTEX Demo•• Site Location:Site Location: New JerseyNew Jersey•• Contaminants:Contaminants: BTEXBTEX•• Site Description:Site Description: Shallow groundwater Shallow groundwater –– silty, silty,

nonnon--homogeneous sand formationhomogeneous sand formation•• Remediation History:Remediation History: 6 years of Air Sparging 6 years of Air Sparging

/ SVE; Levels reached asymptote/ SVE; Levels reached asymptote•• Corrective Action:Corrective Action: Retrofitted ART Retrofitted ART

Technology to existing blower, compressor, Technology to existing blower, compressor, and offand off--gas treatment; 2 ART wells installed in gas treatment; 2 ART wells installed in Sept. 04Sept. 04

Elapsed MW-1 MW-2Time B T E X Total

VOC B T E X TotalVOC

0 2,650 11,000 1,320 11,000 26,333 94 5,740 957 8,780 16,206

28 days 2 62 34 517 614 2,400 8,330 1,010 7,780 19,520

78 days 15 61 12 129 217 1 33 17 121 332

%Reduction 99

ART Remediation ResultsART Remediation Results

78 Days 78 Days Average 98% Contaminant Average 98% Contaminant ReductionReduction

99 99 99 99 99 99 99 98 99 98

Former Gasoline Station Former Gasoline Station RemediationRemediation

•• Location:Location: DeKalb, IllinoisDeKalb, Illinois•• History:History: Gasoline/Service Station from 1961 to Gasoline/Service Station from 1961 to

19931993•• Contaiminats:Contaiminats: BTEXBTEX•• Geology:Geology: Silty to Sandy Clay with Sandy Silt Silty to Sandy Clay with Sandy Silt

LayersLayers•• Groundwater Depth:Groundwater Depth: 10 Feet10 Feet•• Client Goals:Client Goals: Residential Objectives Residential Objectives

Site Remediation HistorySite Remediation History

•• May 2002May 2002: On: On--Site Soil & Groundwater Site Soil & Groundwater Remediation Using MagnesiumRemediation Using Magnesium--Based Based Peroxygen Injections.Peroxygen Injections.

•• May 2004May 2004: Corrective Action Plan : Corrective Action Plan Submitted to Jump Start OnSubmitted to Jump Start On--Site Soil & Site Soil & Groundwater Remediation.Groundwater Remediation.

•• December 2004December 2004: CAP Approved by Illinois : CAP Approved by Illinois EPA as a Pilot Study Using 1 ART Well.EPA as a Pilot Study Using 1 ART Well.

Groundwater Data Using Groundwater Data Using Peroxygen Injections in 2002Peroxygen Injections in 2002•• Source Area (MWSource Area (MW--11)11): : increaseincrease of 55% of 55%

benzenebenzene and and 10.2% BTEX10.2% BTEX..

Groundwater Data UsingGroundwater Data UsingART TechnologyART Technology

•• OWOW--1 (10 ft from ART)1 (10 ft from ART): : reductionreduction of 99.0% of 99.0% benzene and 98.7% BTEXbenzene and 98.7% BTEX

•• OWOW--2 (20 ft from ART)2 (20 ft from ART): : reductionreduction of 99.3% of 99.3% benzene and 89.9% BTEXbenzene and 89.9% BTEX

•• MWMW--11 (30 ft from ART)11 (30 ft from ART): : reductionreduction of 99.3% of 99.3% benzene and 89.8% BTEXbenzene and 89.8% BTEX

•• OWOW--3 (40 ft from ART)3 (40 ft from ART): : reductionreduction of 96.5% of 96.5% benzene and 87.5% BTEXbenzene and 87.5% BTEX

•• MWMW--3 (down3 (down--gradient property line)gradient property line): : reductionreductionof 21.8% benzene and 60.2% BTEXof 21.8% benzene and 60.2% BTEX

Remedial GoalsRemedial GoalsProject ObjectivesProject Objectives

1.1. Remediate Benzene Remediate Benzene Soils to <0.03 mg/kgSoils to <0.03 mg/kg

2.2. Remediate Benzene Remediate Benzene Groundwater to <0.005 Groundwater to <0.005 mg/Lmg/L

3.3. Accelerate Remediation Accelerate Remediation Time with Minimal CostTime with Minimal Cost

4.4. Reimbursement from the Reimbursement from the Illinois LUST FundIllinois LUST Fund

AccomplishmentsAccomplishments99% Complete99% Complete

95% Complete95% Complete

YesYes(97% Complete in 261 Days)(97% Complete in 261 Days)

YesYes

Site BackgroundSite Background

•• Gasoline Station / Truck StopGasoline Station / Truck Stop•• Two Confirmed Gasoline Releases in 2003Two Confirmed Gasoline Releases in 2003•• Primary COC: BenzenePrimary COC: Benzene•• Dissolved Concentrations exceeding 12,000 ug/L Dissolved Concentrations exceeding 12,000 ug/L

benzenebenzene•• Onsite Receptor: Impacted Utility VaultOnsite Receptor: Impacted Utility Vault•• Down gradient Receptor: Impacted Perennial Down gradient Receptor: Impacted Perennial

Stream (~350 feet)Stream (~350 feet)•• No Free ProductNo Free Product

Geologic / Hydrogeologic DataGeologic / Hydrogeologic Data

•• Northern Piedmont Physiographic ProvenceNorthern Piedmont Physiographic Provence•• Lower Groundwater Pollution Susceptibility ZoneLower Groundwater Pollution Susceptibility Zone•• Sandy Silt / Partially Weather Rock (Saprolite) Sandy Silt / Partially Weather Rock (Saprolite)

overlain by as much as 20 feet of sand silt fill overlain by as much as 20 feet of sand silt fill materialmaterial

•• Potentiometric Surface ~30 feet Below Land Potentiometric Surface ~30 feet Below Land SurfaceSurface

•• Groundwater Flow Velocity ~900 feet/yearGroundwater Flow Velocity ~900 feet/year•• SiteSite--Specific ACL 3,000 ug/L BenzeneSpecific ACL 3,000 ug/L Benzene

Analytical Results SummaryAnalytical Results Summary

Source Area:Source Area:50% Reduction in Dissolved Benzene 50% Reduction in Dissolved Benzene

Concentrations Since ImplementationConcentrations Since Implementation

Down Gradient:Down Gradient:•• 75% Reduction in Dissolved Benzene 75% Reduction in Dissolved Benzene

Concentrations Since ImplementationConcentrations Since Implementation

Removal of Approximately 2,500 Gallons of Removal of Approximately 2,500 Gallons of HydrocarbonsHydrocarbons

MTBE/BTEX/TPH Site ClosureMTBE/BTEX/TPH Site ClosureSite Location:Site Location: Isleton, CaliforniaIsleton, California

Contaminants:Contaminants: Gasoline, Diesel, MTBEGasoline, Diesel, MTBE

Site History: Site History: Tanker spill (750 gallons), Tanker spill (750 gallons), downgradient receptorsdowngradient receptors

Soil types:Soil types: Sands, siltsSands, silts

Groundwater:Groundwater: fluctuating 10fluctuating 10--15 feet bgs15 feet bgs

Client Goals:Client Goals: Quick response, fast Quick response, fast remediation, protect drinking water wellsremediation, protect drinking water wells

Month/Year 9/02 12/02 3/03 4/03 6/03 7/03 8/03 10/03 2/04

MTBE (µg/l) 42,000 4,800 150 780 32 26 9.1 5.7 2.8

•• Reduced MTBE to below primary, secondary Reduced MTBE to below primary, secondary cleanup standardscleanup standards•• ART system shut down in August 2003 ART system shut down in August 2003 •• Sampling to identify rebound Sampling to identify rebound •• Testing confirmed no reboundTesting confirmed no rebound•• Concentrations continued to decreaseConcentrations continued to decrease•• Well pulled, closure letter receivedWell pulled, closure letter received

MTBE Remediation SummaryMTBE Remediation Summary

Cleanup Std. 13 ppbCleanup Std. 13 ppb

Once through strippingOnce through stripping

100 100 ppmppm Based on:Based on:50% Air stripping efficiency of 50% Air stripping efficiency of MTBEMTBE

50 50 ppmppm

Not acceptable!

ART Removal RateART Removal Rate100 ppm

30 30 ppmppm9 9 ppmppm

2.7 2.7 ppmppm0.81 0.81 ppmppm

0.24 0.24 ppmppm0.07 0.07 ppmppm

0.02 0.02 ppmppm

0.006 ppm

Approximate ART EfficiencyApproximate ART Efficiency50% Air stripping 50% Air stripping

20% In20% In--well spargingwell sparging70% Total70% Total

9 In9 In--well stripping passeswell stripping passes>99.9% removal>99.9% removal

ART WellART Well

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SSpargingparging

Groundwater level from Groundwater level from sparging sparging and and vacuumvacuum

Groundwater level from Groundwater level from sparging sparging

EffectsEffects

Cleaner, low density Cleaner, low density waterwater

Cleaner, low density Cleaner, low density waterwater

VaultVault

GradeGrade

Soil Soil VVapor Extractionapor Extraction

Pum

pPu

mp

Negative GradientNegative Gradient Negative GradientNegative Gradient

AmendmentsAmendments

AmendmentsAmendments

Potential Remedy ConfigurationPotential Remedy Configuration

ART Well

Groundwater FlowGroundwater Flow

ARTARTSource ControlSource Control

ART Flow Through ART Flow Through TreatmentTreatment

LimitationsLimitations

Hydraulic conductivity > 10Hydraulic conductivity > 10--55 cm/sec.cm/sec.

LowPerma AdvantagesLowPerma Advantages

•• Minimal O&MMinimal O&M•• Simple operationSimple operation•• No water disposal issuesNo water disposal issues•• Highly adjustable to site conditionsHighly adjustable to site conditions•• Synergistic technologiesSynergistic technologies•• Can distribute amendmentsCan distribute amendments•• Designed for low yield sitesDesigned for low yield sites

Check Valve- water in

Old Bakery Site RemediationOld Bakery Site Remediation•• Location:Location: Salem, OregonSalem, Oregon•• History:History: Bakery Fleet Vehicles Gasoline UST Bakery Fleet Vehicles Gasoline UST

System from approximately 1926 to 1951System from approximately 1926 to 1951•• GroundGround--Water Contaminants of Concern: Water Contaminants of Concern:

Benzene and 1,2Benzene and 1,2--Dichloroethane (EDC). Dichloroethane (EDC). •• Geology:Geology: Clayey Silt to Silty Clay Transitioning to Clayey Silt to Silty Clay Transitioning to

Clayey Sand & Gravel at DepthClayey Sand & Gravel at Depth•• Ground Water Depth:Ground Water Depth: 1010-- to 20to 20--Feet bgsFeet bgs•• Client Goals:Client Goals: Meet Oregon DEQ RiskMeet Oregon DEQ Risk--Based Based

Concentrations (RBCs) for GroundConcentrations (RBCs) for Ground--Water Vapor Water Vapor Intrusion for Future Urban Residential & Intrusion for Future Urban Residential & Commercial Use of Planned Redevelopment Commercial Use of Planned Redevelopment

Remedial Goals AchievedRemedial Goals AchievedPotentially Complete

Ground Water Exposure Pathway

Oregon DEQ Generic RBC

(µg/l)

Historic Maximum Concentration Range

(µg/l) for Wells MW-2 & MW-8

Concentration Range (µg/l) for Wells MW-2 & MW-8 After 90-Days of LowPerma® Operation

Benzene Vapor Intrusion CommercialConstruction & Excavation WorkerVapor Intrusion Urban Residential

2,700

1,700

340

3,320 – 11,000 5.71 – 151

EDC Construction & Excavation WorkerVapor Intrusion Urban Residential

600

460

607 0.500 U – 1.48

The Question IsThe Question Is……

Why rely on only oneWhy rely on only one……when you when you cancan install more install more than six technologies for than six technologies for the same cost!?the same cost!?