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Sci Total Environ

Title:		"Impact of dry weather discharges on annual pollution from a separate storm sewer in Toulouse, France"
Author(s):		Deffontis S; Breton A; Vialle C; Montrejaud-Vignoles M; Vignoles C; Sablayrolles C;
Address:		"CATAR-CRITT Agroressources-CRT n degrees 96/7, LCA (Laboratoire de Chimie Agro-Industrielle), UMR 1010 INRA/INPT, ENSIACET, Toulouse, France. stephanie.deffontis@ensiacet.fr"
Journal Title:		Sci Total Environ
Year:		2013
Volume:		20130326
Issue:
Page Number:		394 - 403
DOI:		10.1016/j.scitotenv.2013.03.014
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"The city of Toulouse with its separate sewer system is ideal for studying stormwater. However, during dry weather, the storm sewer also discharges water into the environment, and it is the impact of these discharges on annual pollution from storm sewer that is the object of this study. Samples have been taken from the outlets of two storm drains located in heavily and moderately urbanized areas. Sampling has been undertaken during wet weather and during dry weather between January 2010 and February 2011. Three dry weather and two wet weather samples have been taken every three months and from each outlet. The overall pollution parameters have been analyzed (chemical oxygen demand, biological oxygen demand, total nitrogen, ammonium, nitrate, total phosphorus, suspended solid matter, volatile suspended matter, pH, conductivity, turbidity). Characterization has been completed by analysis of trace organic compounds: polycyclic aromatic hydrocarbons, total hydrocarbons, methyl tert-butyl ether, diethylhexylphthalate, nonylphenols, hormones (estradiol, ethinylestradiol). For certain parameters, the results obtained did not conform to legislative requirements concerning discharge into the natural environment. Correlations between these parameters have been studied, and identified between several of them using principal component analysis. The most important correlation observed was between conductivity and concentration in total phosphorus for one of the outlet. Results showed that dry weather had an impact on annual pollution load from separate storm sewer and that level of urbanization was also a factor. The effect of season has been studied but no significant impact was found"
Keywords:
Notes:		"PubMed-not-MEDLINEDeffontis, S Breton, A Vialle, C Montrejaud-Vignoles, M Vignoles, C Sablayrolles, C eng Research Support, Non-U.S. Gov't Netherlands 2013/03/30 Sci Total Environ. 2013 May 1; 452-453:394-403. doi: 10.1016/j.scitotenv.2013.03.014. Epub 2013 Mar 26"