Long-Term Management of Contaminated Soil and Groundwater in Iwilei District, Honolulu
Long-Term
Management of
Contaminated Soil
and Groundwater –
Iwilei District,
Honolulu
April 16, 2015
References:
HIDOH 2015 Programmatic EHE/EHMP Document, Iwilei District,
Honolulu, Hawaii, Hawaii Department of Health Office of Hazard
Evaluation and Emergency Response, March 2015
HIDOH, 2011,
Evaluation of Environmental Hazards at Sites with
Contaminated Soil and Groundwater
(Summer 2008, updated
March 2009): Hawai’i Department of Health, Office of Hazard
Evaluation and Emergency Response,
www.hawaii.gov/health/environmental/hazard/eal2005.html.
HIDOH, 2009,
Technical Guidance Manual
: Hawai’i Department
of Health, Office of Hazard Evaluation and Emergency
Response, http://www.hawaiidoh.org/
The Iwilei District
The Iwilei District
•
315 Acres
•
Multiple land owners and responsible
parties
•
Commercial / Industrial use
•
Bulk Fuel Terminals
•
Former MGP Site
•
Active/Inactive Petroleum Pipelines
•
Dole Cannery
•
Petroleum Contaminated Soil, Soil Gas
and
Groundwater
•
Debris Contaminated Soil
The Remedial Process
Historical Records Review
Advanced Evaluation of
Identified Concerns
Selected Remedy
Site Investigation/
Environmental Hazard
Evaluation
Remedial Alternatives
Analysis
Response Action
Memorandum
Long term management-
Environmental Hazard
Management Plans
Direct
Exposure
Groundwater
Prevailing Wind
Direction
Leaching
D
e
f
a
u
l
t
C
o
n
c
e
p
t
u
a
l
S
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t
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M
o
d
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f
P
o
t
e
n
t
i
a
l
E
n
v
i
r
o
n
m
e
n
t
a
l
H
a
z
a
r
d
s
Gross
Contamination
Ecotoxicity
Stream
Stream
Discharge to
aquatic habitats
Free Product
Dissolved plume
Leaching
Drinking
Water
Vapor
Intrusion
Soil
Iwilei Environmental Hazards
-Petroleum-
SOIL
INDOOR AIR
SOIL GAS
Aquatic
Habitats
Human
Health
Drinking
Water
(toxicity)
Vapors
Intrusion
Gross
Contamination
Terrestrial
Habitats
Leaching
Direct Exposure
Vapors
Intrusion
Human
Health
Gross
Contamination
GROUNDWATER
Iwilei Environmental Hazards
-Lead, pesticides, etc.-
SOIL
INDOOR AIR
SOIL GAS
Aquatic
Habitats
Human
Health
Drinking
Water
(toxicity)
Vapors
Intrusion
Gross
Contamination
Terrestrial
Habitats
Leaching
Direct Exposure
Vapors
Intrusion
Human
Health
Gross
Contamination
GROUNDWATER
EHE Report
•
Site Background
•
Summary of investigations
•
Comparison of site data to action levels
•
EHE: Identification of potential hazards
•
Advanced evaluation of targeted hazards
•
Conclusions & Recommendations
•
Summarize findings
•
Addition site investigation
•
Advanced evaluation of targeted
hazards
•
Prepare remedial action plan
•
Prepare EHMP
Environmental Hazard Management Plans
(long-term management of residual contamination)
•
Same information as in EHE
•
Usually include as appendix in closure report
•
Include to-scale maps of affected areas
•
Summarize site restrictions & management
needs
•
soil & groundwater management
•
caps, vapor barrier systems, etc.
•
deed restrictions, etc.
•
Consider EHMP in budget for future
development & maintenance
Three types of EHMPs
Pre-construction
Site-specific
Programmatic
EHMP
Lowe’s Site, Honolulu
Gross
Contamination
(combined)
Primary Drivers:
•
TPH aliphatics,
Vapor Intrusion
Hazards
(soil data)
Primary Drivers:
•
TPH aliphatics,
Vapor Intrusion
Hazards
(groundwater
data)
Primary Drivers:
•
TPH aliphatics,
•
Benzene
(GASCO)
Discharge to
Surface Water
Hazards
(groundwater
data)
Primary Drivers:
•
TPH aliphatics,
Pre-Construction Remedial Action
•
Reduce vapor intrusion & gross contamination concerns;
•
Soil excavation and on-site treatment (thermal
desorption)
•
Manage remaining contamination in place under EHMP
(on and off-site).
Vapor System Piping
Vapor Barrier
Vapor Membrane
Soil Vapor Control
System
Lowe’s Vapor Mitigation System (subslab)
Smoke
Testing
V
ent
Risers
Vent Risers
Vent
Conduits
Lowe’s Vapor Mitigation System (subslab)
What is the Programmatic
Iwilei EHMP for?
1.
Document specific environmental hazards known to
be spread throughout the area
2.
Provides guidance for the management of
contamination in common areas where investigative
data is unavailable
3.
Promotes regulatory consistency throughout the
area with regard to petroleum contamination
4.
Protects agencies and entities (e.g. HECO, Board of
Water) doing intrusive work in the area
What the Programmatic
EHMP Does
NOT
Do
1.
Does not supercede existing EHMPs on remediated sites
2.
Does not absolve an RP from characterization or cleanup of a Site
3.
Does not exempt RPs from other applicable State laws and rules
4.
Does not absolve RP from developing a Site-Specific EHMP in the
future
Key Features
1.
Specific direction on dealing with petroleum
contamination in all types of media
2.
Short forms to streamline reporting requirements to
HDOH
3.
Contingency plans for various scenarios contractors
may face
4.
Contains procedures commonly used at other Sites
Accessing the EHMP
Download from the HEER office webpage:
http://eha-web.doh.hawaii.gov/eha-cma/Org/HEER/
Request a copy:
Jordan.Nakayama@doh.Hawaii.gov
Questions?
Interested in a specific topic? Interested in presenting?
Contact us with your suggestions!
Upcoming Webinars
(contact
roger.brewer@doh.hawaii.gov
)
When:
May 11, 2015,
12:00 PM – 1:00 PM, Hawaii Time
Who:
Steve Nigro, Regenesis
Kelly Smith, Landscienece Tech
What:
New Regenesis & Landscience Accelerated
Bioremediation Technology
Interested in a specific topic? Interested in presenting?
Contact us with your suggestions!
The Iwilei District in Honolulu, Hawaii, spans 315 acres with multiple landowners and responsible parties. It features commercial and industrial use, including bulk fuel terminals, former MGP site, active/inactive petroleum pipelines, and Dole Cannery. The area has been impacted by petroleum-contaminated soil, soil gas, groundwater, and debris-contaminated soil. Remediation efforts have involved historical records review, site investigation, environmental hazard evaluation, advanced evaluation of concerns, remedial alternatives analysis, and long-term management planning. The conceptual site model outlines potential environmental hazards like ecotoxicity, direct exposure, vapor intrusion, and stream leaching affecting terrestrial and aquatic habitats. Various contaminants like petroleum and lead pose risks to indoor air quality, human health, and drinking water. The management approach focuses on implementing selected remedies to address these environmental challenges.
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Presentation Transcript
Long-Term Management of Contaminated Soil and Groundwater Iwilei District, Honolulu April 16, 2015
References: HIDOH 2015 Programmatic EHE/EHMP Document, Iwilei District, Honolulu, Hawaii, Hawaii Department of Health Office of Hazard Evaluation and Emergency Response, March 2015 HIDOH, 2011, Evaluation of Environmental Hazards at Sites with Contaminated Soil and Groundwater (Summer 2008, updated March 2009): Hawai i Department of Health, Office of Hazard Evaluation and Emergency Response, www.hawaii.gov/health/environmental/hazard/eal2005.html. HIDOH, 2009, Technical Guidance Manual: Hawai i Department of Health, Office of Hazard Evaluation and Emergency Response, http://www.hawaiidoh.org/
The Iwilei District 315 Acres Multiple land owners and responsible parties Commercial / Industrial use Bulk Fuel Terminals Former MGP Site Active/Inactive Petroleum Pipelines Dole Cannery Petroleum Contaminated Soil, Soil Gas and Groundwater Debris Contaminated Soil
The Remedial Process Historical Records Review Site Investigation/ Environmental Hazard Evaluation Advanced Evaluation of Identified Concerns Remedial Alternatives Analysis Response Action Memorandum Long term management- Environmental Hazard Management Plans Selected Remedy
Default Conceptual Site Model of Potential Environmental Hazards Prevailing Wind Direction Ecotoxicity Direct Exposure Vapor Intrusion Stream Soil Leaching Leaching Stream Discharge to aquatic habitats Free Product Gross Contamination Dissolved plume Groundwater Drinking Water
Iwilei Environmental Hazards -Petroleum- INDOOR AIR Gross Human Health Vapors Intrusion Contamination Terrestrial Habitats Direct Exposure SOIL SOIL GAS Leaching Aquatic Habitats Vapors Intrusion GROUNDWATER Human Health Drinking Water (toxicity) Gross Contamination
Iwilei Environmental Hazards -Lead, pesticides, etc.- INDOOR AIR Gross Human Health Vapors Intrusion Contamination Terrestrial Habitats Direct Exposure SOIL SOIL GAS Leaching Aquatic Habitats Vapors Intrusion GROUNDWATER Human Health Drinking Water (toxicity) Gross Contamination
EHE Report Site Background Summary of investigations Comparison of site data to action levels EHE: Identification of potential hazards Advanced evaluation of targeted hazards Conclusions & Recommendations Summarize findings Addition site investigation Advanced evaluation of targeted hazards Prepare remedial action plan Prepare EHMP
Environmental Hazard Management Plans (long-term management of residual contamination) Same information as in EHE Usually include as appendix in closure report Include to-scale maps of affected areas Summarize site restrictions & management needs soil & groundwater management caps, vapor barrier systems, etc. deed restrictions, etc. Consider EHMP in budget for future development & maintenance
Three types of EHMPs Pre-construction Site-specific Programmatic
EHMP Lowe s Site, Honolulu
Gross Contamination (combined) Primary Drivers: TPH aliphatics,
Vapor Intrusion Hazards (soil data) Primary Drivers: TPH aliphatics,
Vapor Intrusion Hazards (groundwater data) Primary Drivers: TPH aliphatics, Benzene (GASCO)
Discharge to Surface Water Hazards (groundwater data) Primary Drivers: TPH aliphatics,
Pre-Construction Remedial Action Reduce vapor intrusion & gross contamination concerns; Soil excavation and on-site treatment (thermal desorption) Manage remaining contamination in place under EHMP (on and off-site).
Lowes Vapor Mitigation System (subslab) Vapor Membrane Vapor System Piping Soil Vapor Control System Vapor Barrier
Lowes Vapor Mitigation System (subslab) Vent Conduits Smoke Testing Vent Risers Vent Risers
What is the Programmatic Iwilei EHMP for? 1. Document specific environmental hazards known to be spread throughout the area 2. Provides guidance for the management of contamination in common areas where investigative data is unavailable 3. Promotes regulatory consistency throughout the area with regard to petroleum contamination 4. Protects agencies and entities (e.g. HECO, Board of Water) doing intrusive work in the area
What the Programmatic EHMP Does NOT Do 1. Does not supercede existing EHMPs on remediated sites 2. Does not absolve an RP from characterization or cleanup of a Site 3. Does not exempt RPs from other applicable State laws and rules 4. Does not absolve RP from developing a Site-Specific EHMP in the future
Key Features 1. Specific direction on dealing with petroleum contamination in all types of media 2. Short forms to streamline reporting requirements to HDOH 3. Contingency plans for various scenarios contractors may face 4. Contains procedures commonly used at other Sites
Accessing the EHMP Download from the HEER office webpage: http://eha-web.doh.hawaii.gov/eha-cma/Org/HEER/ Request a copy: Jordan.Nakayama@doh.Hawaii.gov
Questions? Interested in a specific topic? Interested in presenting? Contact us with your suggestions!
Upcoming Webinars (contact roger.brewer@doh.hawaii.gov) When: May 11, 2015, 12:00 PM 1:00 PM, Hawaii Time Who: Steve Nigro, Regenesis Kelly Smith, Landscienece Tech What: New Regenesis & Landscience Accelerated Bioremediation Technology Interested in a specific topic? Interested in presenting? Contact us with your suggestions!
