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R08-9,020508 Exhibit 18
Handle: Document-60123
Owner: Brown, Don (User-14, brownd:DocuShare)DS
Tuesday, February 5, 2008 04:04:29 PM CST
Tuesday, February 5, 2008 04:05:19 PM CST
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  • midge (Chronomus tentans) and clam (Corbicuelafluminea).
  • Obviously, these lethal temperatures,
that are in the range shown on Figure 2.44, reflect only on the two test organisms.
  • In seven days
exposure to water temperature of 33°C (91.4 °F) or greater, significant amphipod mortalityoccurred; however, fish survival was only slightly effected.
  • The authors
concluded that "it would appear that the 33°C to 34°C temperature is the critical range ifexposures extend for a period of at least 7 days.
  • The current Secondary Contact and
Indigenous Aquatic Life temperature standard allows high temperatures exceeding thislethal threshold to last more than 18 days.
  • We are aware of the fa...
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R08-9,020508 Exhibit 18.pdf
No
4
340231
No
Appears In: R2008-009
Preferred Version: R08-9,020508 Exhibit 18.pdf