LANL IP Decision tree regarding "Class 2" issues (TAL exceedences).
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TALs exceeded?
| NO
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For an individual site, execute and meet protocols for exiting permit coverage.
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Exit permit for this site.
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YES
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Contamination due to off-site sources?
| NO
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Is there adequate monitoring data to demonstrate the site causes TAL exceedences?
| NO
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Are the available data from stormwater?
| YES
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Is storm flow probably in the future?
| YES
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Collect more stormwater data and compare to TALs.
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YES
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YES
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NO
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NO
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Can run on data be collected?
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Are contaminants PCBs or others that are cover in the "Demonstration Protocols"?
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Are available data from soils only or are there no data?
| NO
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Collect new of use existing soils data and proceed to TCLP/Soil Partitioning Model.
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Do soils data using TCLP/Soil Partitioning Model indicate TAL exceedence?
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NO
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NO
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YES
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NO
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YES
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NO
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Are PCBs the contaminant?
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Corrective action necessary.
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Can stormwater be collected in a reasonable timeframe?
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Execute and meet protocols for exiting permit coverage
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Corrective action necessary.
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NO
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YES
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YES
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Are metals with site-specific hardness data or adj. gross alpha< background report levels?
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Compare data to background report May 2012.
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Collect stormwater data and compare to TALs.
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NO
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YES
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Are metals with site-specific hardness data or adj. gross alpha > background report levels?
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Continue monitoring.
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YES
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Corrective action necessary.
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