Tetlin National Wildlife Refuge - USFWS Alaska Region - U.S. Fish ...

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Alaska Highway Photos taken in fall 2004 depicting the various debris at the Seaton Roadhouse site. D. Rocque/USFWS 39 ng/kg, and in fact the next highest TEQ was 0.67 ng/kg. In 2007, the Service plans to conduct additional dioxin sampling to define the extent of contamination at this location. We also plan on sampling at additional locations in 2007 to further assess potential for dioxin contamination at this site. Sediment Results: Inorganic sediment results were compared to screening criteria for freshwater sediments. Two of the sediment samples had nickel concentrations above the probable effects level (PEL) of 35.9 mg/kg (at 36 and 49 mg/ kg, respectively). No known source for nickel is known or suspected at the site, so these may represent background concentrations. GRO was not detected in any of the sediment samples. DRO was detected in 15 sediment samples, however no sample exceeded the 250 mg/kg ADEC Method 2 cleanup value applied to this site. Surface Water Results: GRO was not detected in any of the surface water samples. DRO was detected in 6 of the surface water samples. None of the observed DRO values exceeded the ADEC groundwater standard of 1.5 milligrams per liter (mg/L). Additional water quality testing is planned for 2007 to confirm these findings. Despite earlier debris removal projects, the Seaton Roadhouse site still has considerable solid waste that should be removed. Several areas contained buried and exposed drums, miscellaneous metal and wood debris, and large equipment. This site will need extensive solid waste removal before it can be opened to the public as an interpretive site. Contaminant Assessment 31
Scotty Creek Flats near the northeast corner of TNWR provides some of the most productive waterfowl habitat in the state. 32 Tetlin National Wildlife Refuge USFWS
Page 1 and 2: U.S. Fish & Wildlife Service Tetlin
Page 3 and 4: Executive Summary The purpose of th
Page 5 and 6: Table of Contents Physical Transpor
Page 7 and 8: Acronyms and Abbreviations AAC Alas
Page 9 and 10: viii Tetlin National Wildlife Refug
Page 11 and 12: Contaminant Assessment Process 2 Te
Page 13 and 14: Tetlin National Wildlife Refuge 4 T
Page 19 and 20: Contaminant Sources and Issues 10 T
Page 21 and 22: Formerly Used Defense Sites 12 Tetl
Page 23 and 24: Formerly Used Defense Sites Lake in
Page 25 and 26: Formerly Used Defense Sites CANOL p
Page 27 and 28: Formerly Used Defense Sites A porti
Page 29 and 30: Formerly Used Defense Sites The pip
Page 31 and 32: Formerly Used Defense Sites 22 Tetl
Page 33 and 34: Same Formerly as the Used text Defe
Page 35 and 36: Landfill A recently used shooting r
Page 37 and 38: Alaska Highway Seaton Pond in early
Page 39: Alaska Same as Highway the text hea
Page 43 and 44: Camps and Cabins 34 Tetlin National
Page 45 and 46: Mining Sedimentation of lake on Yel
Page 47 and 48: Same as the text heading Water Qual
Page 49 and 50: Recreation USFWS 40 Tetlin National
Page 51 and 52: Conclusions The Tetlin National Wil
Page 53 and 54: References 44 Tetlin National Wildl
Page 55: Tetlin National Wildlife Refuge P.O

Tetlin National Wildlife Refuge - USFWS Alaska Region - U.S. Fish ...

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