Impact/Purpose:

TMDLs will be developed for: (1) Long Creek, a small

urban stream bordering the Maine Mall in Portland, ME, and (2) a set of multiple streams in the same urban area in Maine (Portland, Lewiston, or Bangor)

Description:

A. EPA's stressor identification methodology will be applied to a considerable amount of data already collected by ME DEP for the Long Creek stream assessment project funded by EPA New England. (Susan Cormier, EPA-ORD Cinn., has agreed to participate and provide some contractor support during fall 2001.) A NPS TMDL for aquatic life impairment will be developed. The TMDL will include (1) a list of the most important stressors in qualitative terms with relative ranking, (2) sources of pollution in qualitative terms, linked to the typical biological response, and ranked in order of importance, (3) site-specific list of BMPs appropriate to address the sources of pollution in Long Creek (4) timeline for anticipated biological recovery times towards water quality standard attainment. B. Results from the SI assessment of the Long Creek data will be used to select essential monitoring parameters for the multiple urban streams (including biological, physical, chemical and stream/land use survey). Essential water quality, sediment, and watershed data will be collected during two field seasons (estimate 4 sampling sites for 5 streams, or a total of 20 sites). The stressor identification process will be applied to the data collected for the set of urban streams (list candidate causes of impairment, analyze the evidence, characterize the causes of impairment). If appropriate, prepare one TMDL for the set of streams, as outlined above for Long Creek, with site-specific lists of prioritized stressors, and site-specific lists of BMPs for implementat

Record Details: