Using Hybrid Poplar to Meet Using Hybrid Poplar to Meet No Further Action Criteria for No Further Action Criteria for an Organic Solvent Site an Organic Solvent Site Craig L

Using Hybrid Poplar to Meet Using Hybrid Poplar to Meet No Further Action Criteria for No Further Action Criteria for an Organic Solvent Site an Organic Solvent Site Craig L - Description

Just Craig L Just VP for Research and Commercial Development VP for Research and Commercial Development Ecolotree Ecolotree Co Co author Louis A author Louis A Licht Licht Ecolotree President Ecolotree President brPage 2br Outline Outline What is No ID: 23628 Download Pdf

179K - views

Using Hybrid Poplar to Meet Using Hybrid Poplar to Meet No Further Action Criteria for No Further Action Criteria for an Organic Solvent Site an Organic Solvent Site Craig L

Just Craig L Just VP for Research and Commercial Development VP for Research and Commercial Development Ecolotree Ecolotree Co Co author Louis A author Louis A Licht Licht Ecolotree President Ecolotree President brPage 2br Outline Outline What is No

Similar presentations


Tags : Just Craig Just
Download Pdf

Using Hybrid Poplar to Meet Using Hybrid Poplar to Meet No Further Action Criteria for No Further Action Criteria for an Organic Solvent Site an Organic Solvent Site Craig L




Download Pdf - The PPT/PDF document "Using Hybrid Poplar to Meet Using Hybrid..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.



Presentation on theme: "Using Hybrid Poplar to Meet Using Hybrid Poplar to Meet No Further Action Criteria for No Further Action Criteria for an Organic Solvent Site an Organic Solvent Site Craig L"— Presentation transcript:


Page 1
Using Hybrid Poplar to Meet Using Hybrid Poplar to Meet "No Further Action” Criteria for "No Further Action” Criteria for an Organic Solvent Site an Organic Solvent Site Craig L. Just Craig L. Just VP for Research and Commercial Development VP for Research and Commercial Development Ecolotree Ecolotree Co Co author, Louis A. author, Louis A. Licht Licht Ecolotree President Ecolotree President
Page 2
Outline Outline What is “No Further Action What is “No Further Action Challenges to “No Further Action Challenges to “No Further Action Environmental Liability and “No

Further Action Environmental Liability and “No Further Action Central Iowa Solvent Spill Site Central Iowa Solvent Spill Site “Significant” Contaminant Removal “Significant” Contaminant Removal Conclusions Conclusions
Page 3
What is No Further Action? What is No Further Action? No Further Action” status is a desirable goal for No Further Action” status is a desirable goal for responsible parties at cleanup sites responsible parties at cleanup sites Regulatory acknowledgement that human health and Regulatory acknowledgement that human health and the environment is protected for a the

environment is protected for a given use given use A definite corrective action A definite corrective action end date end date is in place is in place Property Property use restrictions use restrictions are documented are documented http://www.epa.gov/swer ust1/rbdm/nfalettr.htm
Page 4
Challenges to “No Further Action Challenges to “No Further Action Protection of human health and the environment Protection of human health and the environment must be ensured must be ensured Many can benefit from well Many can benefit from well written NFA letters written NFA letters Responsible

parties, regulators, landowners, Responsible parties, regulators, landowners, investors, lenders investors, lenders But, NFA letters are often filled with non But, NFA letters are often filled with non specific specific caveats caveats “No further action “No further action at this time at this time “No further action “No further action but case may reopened but case may reopened Clear regulatory triggers are needed Clear regulatory triggers are needed http://www.epa.gov/swer ust1/rbdm/nfalettr.htm
Page 5
Environmental Liability and NFA Environmental Liability and NFA Regulators are

reluctant to grant letters of NFA Regulators are reluctant to grant letters of NFA fearing interpretation as an end to environmental fearing interpretation as an end to environmental liability liability Responsible parties view the letter as signifying the Responsible parties view the letter as signifying the end of end of corrective action corrective action with consideration for site with consideration for site conditions and restricted uses conditions and restricted uses Environmental liability still remains should site Environmental liability still remains should site conditions change or

if new uses are conditions change or if new uses are proposed proposed http://www.epa.gov/swer ust1/rbdm/nfalettr.htm Our news snippet culture is a problem for NFA: “No Further Action Status Granted to Toxic Waste Site
Page 6
Phytoremediation and NFA Phytoremediation and NFA Without NFA status, interested parties are likely Without NFA status, interested parties are likely to push for cleanup strategies more aggressive to push for cleanup strategies more aggressive than phytoremediation than phytoremediation The additional expense of more aggressive The additional expense of more

aggressive technologies may cause unnecessary economic technologies may cause unnecessary economic hardship hardship Phytoremediation will have to continually prove Phytoremediation will have to continually prove itself as a worthwhile technology for solvent spill itself as a worthwhile technology for solvent spill sites. sites.
Page 7
Central Iowa Solvent Spill Site Central Iowa Solvent Spill Site Phase I and Limited Phase II Assessment Phase I and Limited Phase II Assessment Jan 2001 Jan 2001 Identified groundwater impact areas (PCE, BTEX) Identified groundwater impact areas (PCE,

BTEX) Three distinct source areas: Three distinct source areas: Area one Area one PCE PCE Area two Area two highest PCE and some BTEX highest PCE and some BTEX Area three Area three PCE near property line ( PCE near property line ( biowall biowall installation) installation)
Page 8
Area 1 Area 3 Area 2 Poplar surivival in EBuffer areas Area 1 - South Planted Healthy Row 1 21 21 Row 2 23 21 Row 3 24 21 Row 4 25 20 Row 5 26 22 Row 6 22 22 Area 2 - Center Planted Healthy Row 1 27 26 Row 2 31 29 Row 3 37 34 Row 4 38 34 Row 5 37 32 Row 6 37 30 Area 3 - East Planted Healthy Row 1 86 85 Row

2 75 73 Row 3 61 58 Ecolotree, Inc. SCALE NOT TO SACLE 3017 Valley View Lane FILE ID: 2001.33 North Liberty, IA 52317 DRAWN: A. Shultz DATE: 11/2404 REVISED: 1/09/04 9,346 ft 170 trees 11,111 ft 207 trees 14,285 ft 263 trees 1,250 ft 25 trees Central Iowa solvent spill site remediated with Ebuffers® GW = 11-14 ft bgs GW flow = NE Fine and medium grain sands Tight clay 13-21 ft bgs
Page 9
Phytoforensics near monitoring well two PCE over 20,000 ug/L initially (MCL=5) Toxic effects to trees were evident Stage 1 Stage 1 Stage 2 Stage 2 Stage 3 Stage 3 Stage 4 Stage 4 Tree Health Tree

Health
Page 10
Monitored Natural Attenuation Monitored Natural Attenuation Source control and long Source control and long term performance term performance monitoring will be fundamental components of monitoring will be fundamental components of any monitored natural attenuation (MNA) any monitored natural attenuation (MNA) remedy remedy “MNA should not be considered a default or “MNA should not be considered a default or presumptive remedy at any contaminated site presumptive remedy at any contaminated site sound technical analyses which provide confidence sound technical analyses

which provide confidence in natural attenuation’s ability to achieve remediation in natural attenuation’s ability to achieve remediation objectives objectives performance monitoring performance monitoring contingency (or backup) remedies where appropriate contingency (or backup) remedies where appropriate http://www.epa.gov/swerust1 /directiv/d9200417.htm
Page 11
Requirements for No Further Action Requirements for No Further Action Historical groundwater and/or soil chemistry data that Historical groundwater and/or soil chemistry data that demonstrate demonstrate a clear and

meaningful trend a clear and meaningful trend of decreasing of decreasing contaminant mass and/or concentration over time at contaminant mass and/or concentration over time at appropriate monitoring or sampling points. appropriate monitoring or sampling points. Hydrogeologic Hydrogeologic and geochemical data that can be used to and geochemical data that can be used to demonstrate demonstrate indirectly indirectly the the type(s type(s ) of natural attenuation ) of natural attenuation processes active at the site, and the rate at which such processes active at the site, and the rate at which

such processes will reduce contaminant concentrations to processes will reduce contaminant concentrations to required levels. required levels. Data from field or microcosm studies (conducted in or Data from field or microcosm studies (conducted in or with actual contaminated site media) which with actual contaminated site media) which directly directly demonstrate the occurrence of a particular natural demonstrate the occurrence of a particular natural attenuation process at the site and its ability to degrade attenuation process at the site and its ability to degrade the contaminants of

concern. the contaminants of concern.
Page 12
Potential Triggers Potential Triggers Contaminant concentrations in soil or groundwater at Contaminant concentrations in soil or groundwater at specified locations exhibit an increasing trend not specified locations exhibit an increasing trend not originally predicted during remedy selection originally predicted during remedy selection Near Near source wells exhibit source wells exhibit large large concentration increases concentration increases indicative of a new or renewed release indicative of a new or renewed release Contaminants are

identified in monitoring wells located Contaminants are identified in monitoring wells located outside of the original plume boundary outside of the original plume boundary Contaminant concentrations are not decreasing at a Contaminant concentrations are not decreasing at a sufficiently rapid rate sufficiently rapid rate to meet the remediation objectives to meet the remediation objectives Changes in land and/or groundwater Changes in land and/or groundwater use use will adversely will adversely affect the protectiveness of the MNA remedy affect the protectiveness of the MNA remedy

http://www.epa.gov/swerust1 /directiv/d9200417.htm
Page 13
Tetrachloroethene concentration in groundwater is trending downward in monitoring well three. Is this a sufficiently rapid rate of contaminant decrease? Concentration, ug/L Concentration, ug/L Slope = -3418 ug/L per year Slope = -6814 ug/L per year Area 1 Area 3 Area 2 Poplar surivival in EBuffer areas Area 1 - South Planted Healthy Row 1 21 21 Row 2 23 21 Row 3 24 21 Row 4 25 20 Row 5 26 22 Row 6 22 22 Area 2 - Center Planted Healthy Row 1 27 26 Row 2 31 29 Row 3 37 34 Row 4 38 34 Row 5 37 32 Row 6 37 30 Area 3 - East

Planted Healthy Row 1 86 85 Row 2 75 73 Row 3 61 58 Ecolotree, Inc. SCALE NOT TO SACLE 3017 Valley View Lane FILE ID: 2001.33 North Liberty, IA 52317 DRAWN: A. Shultz DATE: 11/2404 REVISED: 1/09/04
Page 14
1,1,1-TCA concentration in groundwater is trending downward at MW3. Concentration, ug/L Concentration, ug/L Slope = -32 ug/L per year Slope = -5.1 ug/L per year
Page 15
Toluene concentration in groundwater is trending downward at MW3. Concentration, ug/L Concentration, ug/L Slope = -120 ug/L per year Slope = -17 ug/L per year
Page 16
Xylenes concentration in

groundwater is trending downward at MW3. Concentration, ug/L Concentration, ug/L Slope = -3144 ug/L per year Slope = -942 ug/L per year
Page 17
Conclusions Conclusions