silo 3 - U.S. Department of Energy

Silos Project Environmental Monitoring Plan
40000-PL-0010
August 29, 2002
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. f This project-specific environmental monitoring plan considers the location of the projects with -.
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respect to other remediation activities [e.g. the Waste Pit Remedial Action Pian (WPRAP)
project] and the FEMP boundary. The plan also considers project-specific constraints such as
the contaminants of concern; the characteristics of the OU4 wastes; and the material transfer,
handling, and storage processes. Project-specific emission modeling of both normal and upset
conditions have provided the basis for identifying and instituting process emission controls that
are protective to the workers, public, and the environment (References 6 and 7). The
effectiveness of the project-specific emission controls will be evaluated through analysis of
monitoring results to identify whether increased or altered emission control methods are
necessary. Project-specific environmental monitoring summary results will be provided in
project completion reports.
1 2 3.1 Environmental -. Radiological Air Emissions Monitoring
1 3 Environmental radiological air monitoring for the Silos Projects will -consist of three programs:
14 1 ) Project-specific stack monitoring programs; 2) the IEMP air monitoring program (primarily
15 property boundary and general site areas) including the environmental radon monitoring
16 network; and 3) the Silos area project-specific air monitoring program (within the Silos project
' 7 area boundary).
3.1.1 Project-Specific Stack Monitoring Program
The Silo 3 and Silos 1 and 2 AWR Project stack monitoring requirements are described in the
RD Packages for the projects. Radiological contaminants represent the primary contaminants
of concern, therefore the focus of stack air monitoring will be for radionuclides; however,
monitoring for other contaminants of concern will be added, as warranted. Stack monitoring
for the Silos 1 and 2 project will be addressed in the Silos 1 and 2 RD Package. All three
projects will deploy isokinetic sampling for particulate radionuclides, monitoring, and recording
of stack exhaust that is compliant with Title 40 of the Code of Federal Regulations (CFR), Part
61, Subpart H, and DOE Order 5400.5, Section IV.6.B.
Additionally, the stack exhaust will be continuously monitored for radon to verify that
emissions are controlled such that fence line radon concentrations remain below 0.5 pCi/L, as
an annual average above background. Exhaust Stack radon concentration data from this
monitor will be modeled to determine the resulting fenceline radon concentration and verify
compliance with the annual average 0.5 pCi/l above background fenceline criterion.
Actual ambient concentrations measured by the fenceline and silo area radon monitors will be
used to verify the modeling results. These measurements will be compared to historical
baseline data to identify any trends (Le., increased fenceline concentrations) potentially
resulting from Silos Project operations. Data from the background monitors specified in the
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