HRS Rule, Table 2-3, Page 51589
Sample Measurement < Sample Quantitation Limit a
No observed release is established.
Sample Measurement >= Sample Quantitation Limit a
An observed release is established as follows:
- If the background concentration is not detected (or is less
than the detection limit), an observed release is established when the
measurement equals or exceeds the sample quantitation limit. a
- If the background concentration equals or exceeds the detection limit, an observed release is established when the sample measurement is 3 times or more above the background concentration.
a If the sample quantitation limit (SQL) cannot be established, determine if there is an observed release as follows:
- If the sample analysis was performed under the EPA Contract
Laboratory Program, use the EPA contract-required quantitation limit
(CRQL) in place of the SQL.
- If the sample analysis is not performed under the EPA
Contract Laboratory Program, use the detection limit (DL) in place of
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