Title: Richard Woodward President Sierra Environmental Services, Houston, TX Richard Sloan Remediation Mana
1 Richard Woodward PresidentSierra
Environmental Services, Houston, TX Richard
SloanRemediation Manager Lyondell Chemical
Company, Channelview, TX NICOLE Network
Meeting18-19 April 2002National Research
Council of Italy, Pisa Italy
Consideration of Stakeholder Concerns in the
Development of Site Characterization Plans and
Deployment of Resources
2Objective
- Identification of Stakeholders and
acknowledgement of their concerns during - Characterization plan development
- Plan execution and
- Resource deployment
- Creates the foundation of confidence, comfort
and trust needed for flexible interpretation of
appropriate regulatory standards and legislative
constraints.
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4Stakeholders
- Authorities, agencies, regulators
- Industry, the regulated community
- Academia/researchers
- Special interest groups, environmental advocates
- Contractors, consultants and other service
providers - Community leaders, potential receptors
5Warrington
E - ETBE
B - Benzene
M - MTBE
I - Isooctane
T - Ethanol
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6Acknowledge Stakeholder Concerns
- Equal Partners Agencies, Contractors,
Industries sensitivity to needs and concerns - Cost effective management of the issues
- Open information sharing Independent Quality
Assurace Team (IQAT) to promote credibility,
trust and comfort - Acknowledged convergence of interests
- Common objectives
7W. Massachusetts Gas Station - Site
- 15-20 of sand and gravel over 70-80 of
interbedded fine sand and silt also cobble layer - Bedrock at 90-150 bgs across the study area
- Depth to GW 15-25 (seasonal), perched water
table in study area - Complex geologic conditions
- Commercial/industrial area with other releases
- Public water supply wells 1,500 downgradient
from gasoline release area
8W. Massachusetts Gas Station - Release
- 1989
- UST failed soon after installation
- Weld failure
- 12,000 gallons of gasoline released 2 releases
of premium gasoline - Owner failed to notify DEP and no remedial action
for 2 months - Installed three recovery wells at the release
site to capture plume and remove floating product - Installed monitoring wells to evaluate plume
migration
9SVE and MPE Treatment Shed
TigheBond
10W. Massachusetts Gas Station - Release
- Indoor air sampling at station indicated minimal
impacts - Consultant opinion plume is contained on
station property - DEP required downgradient investigation
- 1993 - Elevated MTBE detected in a deep MW
approximately 550 downgradient of the site - Elevated benzene arrived 2 years later
- Installed 4th recovery well at downgradient
property 90-100 feet bgs to sanitary sewer
11Total VOCs Under Pumping Conditions (1999)
12Perched Water Between Source Well Field
TigheBond
13Flexibility in Appropriate Regulatory Standards
and Legislative Constraints
- Risk Based Corrective Action
- Expedited remedial action
- Voluntary corrective action
- Brownfield Development Incentives
14Site Assessment
- Basic Objectives
- Define the nature and extent of the affected soil
and groundwater and the risk to the public health
and the environment - Determine the site-specific critical issues that
drive the overall response action - Develop the technical basis for a timely,
cost-effective, and environmentally sound
response plan
15Site Assessment
- Principles
- Driven by need to effectively manage the site and
to protect the public health and the environment - Evaluate local media soil, surface water,
groundwater, and air - Identify at-risk receptors and likely exposure
pathways. Focus on these first - Determine all chemicals of concern
- Focus on source definition and control second
- Focus on dissolved plumes third
- Develop sufficient data to manage all site issues
16Subsurface Definition
- Series of vertical transects
- Cx,y,z fKx,y,z, where
- C contaminant distribution
- K hydraulic conductivity distribution
- Effects of heterogeneity on migration
- Three dimensional perspectives
- Coring (continuous, split-spoon, etc.)
- Geophysics (borehole surface)
- CPT (3-channel and piezocone)
17Direct Push Rig
- Quick (samples/day)
- Cost-effective
- Access tight spaces
- Delineate stratigraphy
- Identify high/low K zones
- May reduce number of core samples required
- Depth limited
1820 Ton CPT Truck
19Example CPT Profiles
20Traditional Site Assessment1,2-DCA SiteShallow
Zone
1,2-DCA SiteDeeper Zone
21Membrane Interface Probe System (MIPS)
22Laser Induced Fluorescence (LIF)CPT Rod With
Sapphire Window
Rapid Optical Screening Tool (ROST) systems.
The Site Characterization and Analysis
Penetrometer System (SCAPS)
233D Contaminant Characterization
24Discrete Multi-Layer Samples (DMLS)
- Vertical contamination distribution within
sampled intervals - Tracer dilution used to estimate K distribution
25Results from Different Sampling Methods
26Wilson Cost Study on 311 Site Assessments((B.H.Wi
lson Battelle Hydrocarbons Conference, Monterey,
CA 2002)
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- 183 SC, 53 KS, 32 NY, 43 ME, TX, CA, IL
- 276 service station/petroleum
- 275 service station
- 32 impacted drinking water wells or
supplies - 3 hazardous waste sites
27Estimate of Site Assessment Cost
- Mean cost - 146,143 (SC)
- Mean cost - 279,022 (128 sites non-SC)
- Mean cost - 231,270 (93 sites non-SC, service
station/petroleum) - Site assessment estimate -85,000 to 130,000
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29French Limited Site
- Isolated DNAPL pockets
- Rebound when natural gradient was reestablished
- Detailed analysis of active remediation effects
- Focused site assessment
30 31Conclusion
- Identification of Stakeholders and
acknowledgement of their concerns during - Characterization plan development
- Plan execution and
- Resource deployment
- Creates the foundation of confidence, comfort
and trust needed for flexible interpretation of
appropriate regulatory standards and legislative
constraints.
32Resources
- Field analytics Dynamic workplanning
http//cluin.org/tiopersp/issue.cfm - Applying the Concept of Effective Data to
Environmental Analyses for Contaminated Sites
(EPA 542-R-01-013) - Using the Triad Approach to Improve the
Cost-effectiveness of Hazardous Waste Site
Cleanups (EPA 542-R-01-016) - TechDirect Clean-up Information
http//clu-in.org