Evaluation of groundwater monitoring according to 2000/60/EC and 2006/118/EC directives in Piedmont
AbstractIn order to optimize monitoring activities as well to adapt it to legislative framework, since 2011 Piedmont Regional Groundwater Monitoring Network (RMRAS) has undergone several upgrades interesting both number of monitoring points and such points location. This process, according to WFD proceedings, has also involved modifications on the analytical protocol adopted as well as on the final configuration of groundwater bodies (GWB) Main results from first WFD triennium implementation (2009- 2011), by applying the new monitoring system, has had as a consequence a new definition of Chemical Status, according to D.lgs. 30/2009 and Decreto 260/2010, which allows us to express some considerations on the methodological approach proposed by the above mentioned legislation. In general, emerges a very articulated monitoring and classification system which allows to provide additional elements of knowledge than in the past. Others innovative aspects include modulation of monitoring cycles (Surveillance-Operational Monitoring and Punctual Operational Monitoring) related with an upgrade of analytical programs, toward a general approach much more tied to the pressures which are insisting over GWBs. Study of main contaminants occurrences compared with their SQA/ VS allow to obtain a more detailed overview to assess main implications that favored groundwater contamination. Chemical Status definition may be influenced by the natural background values (VF) of certain elements in very specific context. In Piedmont case such phenomena involves Nickel and ChromeVI. VF determination can give as a result VS modification for the considered elements inside the entire GWB area or parts of it. However, difficulties arise when attempting accurate discrimination from mixed contributions (natural + anthropogenic) occurring in complex environmental scenarios.
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