Environmental

Wisconsin's 'Tier 1' cleanup standard under the environmental remediation program (NR 720-740) refers to:

AThe most stringent 'background' cleanup level for the most sensitive land uses✓ Correct
BThe least stringent standard
COnly applicable to industrial sites
DA state-specific standard above federal requirements

Explanation

Wisconsin's Tier 1 standards are the most stringent (typically background or near-background levels), used for the most sensitive land uses such as residential properties where direct contact and ingestion are concerns.

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