Jump to main content or area navigation.

Contact Us

Superfund


   

Potential Contamination of Targets

  • The values for potential targets are multiplied by surface water dilution weights (HRS Table 4-13) but also by a further dilution weight adjustment.
    • The assumption in the ground water to surface water component is that contaminated ground water will move outward from the sources in all directions and that only that portion that intersects surface water within 1 mile should be included in the potential threat to surface water targets.

      HRS rule, page 51632, Figure 4-3
      Sample Determination of Ground Water to Surface Water Angle


      Figure 4-3 Sample Determination of Ground Water to Surface Water Angle
    • The angle theta as estimated from this graphic is entered into HRS Table 4-27, page 51631 to determine the additional dilution weight adjustment.

    • The impact of theta is to reduce the values of potential targets unless the site is substantially surrounded by surface water.

previous  [Slide 6 of 7]  [Home]  next

 

Superfund Help: Acronyms | Topics | Frequent Questions | Publications | Sitemap

OSWER Home | Superfund Home | Innovative Technologies Home