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Components of the Monitoring Plan |
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 d. Define areal extent and thickness of the cap.
e. Determine that desired capping thickness is maintained.
f.
Determine cap effectiveness in isolating contaminated material from
benthic environment.
g. Determine extent of recolonization of biology and bioturbation
potential.
Table 7
Sample Tiered Monitoring Program for a Capping Project
Monitoring
Management (Thresh-
Options
Monitoring Program
Threshold
old Not Exceeded)
(Threshold Exceeded)
Consult site designation
surveys, technical advi-
sory committee, and
EIS for physical and
chemical baseline
conditions.
TIER I
*Go to next tier.
*Continued to monitor at
Pre, Post
*Mound within 5 ft of
*Bathymetry
*Stop use of site.
same level.
Placement,
nav. hazard.
*Subbottom profiles
*Increase cap thickness.
*Reduce monitoring
Annually
*Cap thickness
*Side-scan sonar
level.
decreased 0.5 ft.
*Surface grab samples
*Stop monitoring.
*Contaminant exceeds
*Cores
limit in sediment or
*Water samples
water sample.
TIER II
*Continued to monitor at
*Go to next tier.
Quarterly
*Cap thickness
*Bathymetry
same level.
*Replace cap material.
to Semi-
decreases 1 ft.
*Subbottom profiles
*Reduce monitoring
*Increase cap thickness.
annually
*Contaminant exceeds
*Side-scan sonar
level.
*Stop use of site.
limit in sediment or
*Sediment profile cam.
water sample.
*Cores
*Water samples
*Consolidation instru.
TIER III
*Continued to monitor at
*Replace cap material.
*Cap thickness
Monthly to
*Bathymetry
*Increase cap thickness.
same level.
decreases 1 ft.
Semi-
*Subbottom profiles
*Stop use of site.
*Reduce monitoring
*Contaminant exceeds
annually
*Side-scan sonar
*Change cap sediment.
level.
limit in sediment or
*Sediment profile cam.
*Redredge and remove.
water sample.
*Surface grab samples
*Contaminant exceeds
*Cores
limit in tissue.
*Water samples
*Tissue samples
Components of the Monitoring Plan
The components of the monitoring plan must be directly tied to the
objectives and should include physical, chemical, and biological
components to address the processes of concern. In identification of
components and processes, it should be noted that biological responses are
a direct result of physical and chemical alterations due to the disposal
100
Chapter 9 Monitoring Considerations for Capping
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