SECTION 3 Site Investigations & Results C:\D Data\GWS C Drive\GWS\Client Files\1344 OGL - WKP\4 Deliverables\WKP Final Draft Report\June Report\WAI-985-000-REP-LC-0030. Final_Rev_0.docx 25 Figure 24 Surface Water Flows vs Radon Concentration 3.8 Surface Water Chemistry During the gauging events, contemporaneous sampling of surface water and groundwater chemistry was undertaken for a broad suite of analytes. Table 6 and Figure 25 presents the results of the analyses. A summary of the results of the laboratory analysis of these samples is as follows: • There is little difference in the chemistry between any of the surface water samples with the exception of the warm spring. • The surface water has a sodium bicarbonate water chemistry. • The warm spring is calcium bicarbonate dominant water type and is moderately elevated in some metals. • Shallow groundwater has a different chemistry to deep groundwater. • Deep groundwater has a calcium bicarbonate water signature. • Clay alteration results in elevated calcium, bicarbonate and sulphate concentrations. • Surface waters show a slight shift towards shallow groundwater chemistry under higher flow conditions. • WKP01D chemistry is the same as the warm spring. • WKP02 chemistry is a mixture of deep groundwater chemistry and surface water. Overall, the sampling indicates there is different chemistry where groundwater flow paths differ in length.
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