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HRS Guidance Manual, Section 6.2, Page 91
HRS Guidance Manual, Section 6.2, page 91
Adequately Determined (for purposes of Tier A only): The total mass of all CERCLA hazardous substances in the source and releases from the source (or for the area of observed contamination) is known or is estimated with reasonable confidence. (For the site hazardous waste quantity factor value to be adequately determined for Tier A, this definition must apply for all sources.)
HRS Guidance Manual, Section 6.3, page 99
Adequately Determined (for purposes of Tier B only): The total mass of all hazardous wastestreams and CERCLA pollutants and contaminants for the source and releases from the source (or for the area of observed contamination) is known or is estimated with reasonable confidence. (For the site hazardous waste quantity to be adequately determined for Tier B, this must apply for all sources.)
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