Tier 1 level definition

Tier 1 level means the groundwater and soil levels in the Tier 1 Look-up Table set out in rule 135.9(455B) and Appendix A.

Examples of Tier 1 level in a sentence

  • When a generic brand (Tier 1) is not available, a preferred brand (Tier 2) will be covered at the Tier 1 level.

  • If non-drinking water wells are within 1,000 feet of the source, the applicable target level is the groundwater ingestion pathway Tier 1 level for potential receptors.

  • If the Tier 1 level for actual receptors is exceeded at sites designated as granular bedrock and the receptor has not yet been impacted, a monitoring well shall be placed between the source and an actual receptor, outside the defined plume and approximately 200 feet from the actual receptor.

  • Prior to any subsampling, sediment aliquots will be collected for analysis of total sulfides.

  • For potential wells, the applicable target level is the groundwater ingestion pathway Tier 1 level for potential receptors.

  • If drinking water wells are within 1,000 feet of the source, the applicable target level is the groundwater ingestion pathway Tier 1 level for actual receptors.

  • Areas where soil concentrations are greater than the Tier 1 level applicable to residential areas or alternative target levels for nonresidential areas as specified in paragraph “f” are considered potential receptor points of exposure.

  • At a minimum, soil gas must be measured at the suspected area of maximum contamination and near the three monitoring wells with the highest concentrations that exceed the Tier 1 level for the groundwater to enclosed space pathway.

  • For potential receptors, the soil concentration target level for residential areas and areas with no zoning is the Tier 1 level.

  • For potential receptors, the target level at the potential receptor point(s) of exposure is the Tier 1 level for potential receptors.d. The soil leaching to groundwater pathway must be evaluated in accordance with 135.9(5) if this pathway is complete.e. Modeling.

Related to Tier 1 level

  • Working level month (WLM) means an exposure to 1 working level for 170 hours (2,000 working hours per year divided by 12 months per year is approximately equal to 170 hours per month).

  • Working level (WL) means any combination of short-lived radon daughters in 1 liter of air that will result in the ultimate emission of 1.3E+5 MeV of potential alpha particle energy. The short-lived radon daughters are—for radon-222: polonium-218, lead-214, bismuth-214, and polonium-214; and for radon-220: polonium-216, lead-212, bismuth-212, and polonium-212.