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OLS Field Name OLS Field Data
Main Title Total Maximum Daily Load for Fecal Coliform in Chester Creek, University Lake, and Westchester Lagoon, Anchorage, Alaska.
CORP Author Alaska State Dept. of Environmental Conservation, Anchorage.; Environmental Protection Agency, Seattle, WA. Region X.
Year Published 2005
Stock Number PB2008-112023
Additional Subjects Water quality ; Coliform bacteria ; Water sampling ; Streamflow ; Water pollution monitoring ; Surface waters ; Data inventory ; Data analysis ; Implementation ; Monitoring ; Load allocation ; Wasteload allocation ; Critical conditions ; Seasonal variation ; Total Maximum Daily Load (TMDL) ; Chester Creek ; University Lake ; Westchester Lagoon ; Designated use impacts ; Anchorage (Alaska)
Library Call Number Additional Info Location Last
NTIS  PB2008-112023 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 03/10/2010
Collation 137p
Abstract The Chester Creek watershed is located in the Municipality of Anchorage (MOA), the urban center of the Anchorage Bowl in south-central Alaska. Chester Creek flows through University Lake and Westchester Lagoon. The state of Alaska included the entire length of Chester Creek, University Lake and Westchester Lagoon on its 1990 303(d) list as water quality-limited due to fecal coliform, identifying urban runoff as the expected pollutant source. These waters have been included on all subsequent state 303(d) listings. A Total Maximum Daily Load (TMDL) is established in this document for these waters to meet requirements of Section 303(d)(1)(C) of the Clean Water Act and the U.S. Environmental Protection Agencys (EPA) implementing regulations (40 CFR Part 130), which require the establishment of a TMDL for the achievement of water quality standards when a waterbody is water quality-limited. A TMDL is composed of the sum of individual waste load allocations (WLAs) for point sources and load allocations (LAs) for nonpoint sources and natural background loads. In addition, the TMDL must include a margin of safety (MOS), either implicitly or explicitly, that accounts for the uncertainty in the relationship between pollutant loads and the quality of the receiving waterbody. A TMDL represents the amount of a pollutant the waterbody can assimilate while maintaining compliance with applicable water quality standards. Although separate TMDLs could have been prepared for each of the three waters, DEC integrated them into one TMDL as University Lake and Westchester Lagoon are part of the mainstem flow of Chester Creek and have no other natural inlets or outlets.
Supplementary Notes Sponsored by Environmental Protection Agency, Seattle, WA. Region X.
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PUB Date Free Form May 2005
Category Codes 48G; 68D
NTIS Prices PC A08
Document Type NT
Medium Final rept
Cataloging Source NTIS/MT
Control Number 028800710
Origin NTIS
Type CAT