What is the main criteria for a confirmed release of petroleum contamination?

The main criterion for a confirmed release of petroleum contamination is a concentration greater than 50 mg/kg using specific tests. This measurement is essential because it provides a scientifically validated metric for assessing contamination levels in soil or water. The 50 mg/kg threshold indicates a significant presence of petroleum hydrocarbons, warranting further investigation or remediation efforts.

Precision in contamination detection is critical in addressing environmental concerns effectively and ensuring compliance with regulatory standards. While detecting odor and observing a sheen can be indicators of contamination, they are not definitive alone, as they may not quantify the extent of the contamination accurately. Similarly, outreach reports may be important for community engagement and awareness but do not serve as a scientific measure of contamination. Hence, relying on precise tests to determine concentration levels is the most reliable method to confirm a release of petroleum contamination.