DOE/ORO/2327 Oak Ridge Reservation Annual Site Environmental ...

Oak Ridge Reservation
database of water quality conditions at locations where biological community health is monitored was to
support one of the overall objectives of the WQPP: to discover the reasons for biological community
impairment and to ultimately eliminate or reduce those impairments.
In 2009, each location was monitored four times during dry-weather baseflow conditions and two
times during wet-weather storm runoff conditions. Samples were collected for solids (suspended and
dissolved) and metals (total and dissolved). Nutrients (total phosphorus, Kjeldahl nitrogen, nitrate+nitrite
nitrogen, and ammonia) were collected for the sampling events within the growing season (two of the
dry-weather sampling events and one of the wet-weather sampling events). Dry-weather samples were
24-hour time-proportional composite samples, and wet-weather samples were flow-proportional
composite samples of up to 6 hours duration. Field measurements (conductivity, dissolved oxygen, flow,
pH, and temperature) were performed on grab samples during each sampling event. Results are presented
in the 2009 Environmental Monitoring Results (DOE 2009). These results are being used to guide future
efforts under the WQPP, and along with data from future sampling, should prove useful in determining
causes of biological community impairments in the WOC watershed. The data suggest that areas
warranting additional study under the WQPP are instream concentrations of nutrients and metals, and
additional sampling of those parameters is planned for 2010.
5.5.7 Stormwater Surveillances and Construction Activities
Figure 5.33 depicts the location of construction sites that were considered significant in 2009 because
of the need to be covered under the General TN NPDES Permit for Construction Activities and/or an
5-60 Oak Ridge National Laboratory
Fig. 5.33. Active construction sites and WQPP
monitoring locations at ORNL, 2009.