Time Series Plots for As, Cu, Pb, Zn, and pH for the GRUMO wells with stainless steel filters

Time series plots for As, Cu, Pb, Zn, and pH for the GRUMO wells with stainless steel filters (in Danish: Johnsonfiltre). These plots were used to identify well screens with high variability or outliers in the trace elements As, Cu, Pb, and Zn, potentially as a function of pH variation. More information about the purpose of this analysis can be found in GEUS Rapport \"Revision af stationsnettet; Johnsonfiltre\". For summary of results from the time series analysis, see Table 7-1 in the GEUS Rapport.