Table 5

Detail – drinking water barium chemistry regime

LocationAverage non-dissolved barium (mg/L)Range non-dissolved barium (mg/L)Comment on the status of reaction
Ca2+, Ba2+ (aqueous) ↔ Ca, Ba (salt)
Cluster 0.0052 (17% of site-incoming total barium) 0–0.022 (0–71% of site-incoming total barium) Both average and range expressed the reaction not having moved in the reverse (dissolving) direction at all: the average had expressed solid formation generally; the range, equilibrium through to high solid formation 
Cluster cooler sub-location 0.022 Most exacerbated solid formation 
Comparison 0.0002 (0.6% of site-incoming total barium) −0.001 to 0.001 (−3 to 3% of site-incoming total barium) Both average and range expressed near equilibrium conditions generally, neither highly dissolving nor highly solids forming but some solids resuspended/redissolved 
Comparison cooler sub-location −0.001 Most exacerbated the reverse of solid formation 
LocationAverage non-dissolved barium (mg/L)Range non-dissolved barium (mg/L)Comment on the status of reaction
Ca2+, Ba2+ (aqueous) ↔ Ca, Ba (salt)
Cluster 0.0052 (17% of site-incoming total barium) 0–0.022 (0–71% of site-incoming total barium) Both average and range expressed the reaction not having moved in the reverse (dissolving) direction at all: the average had expressed solid formation generally; the range, equilibrium through to high solid formation 
Cluster cooler sub-location 0.022 Most exacerbated solid formation 
Comparison 0.0002 (0.6% of site-incoming total barium) −0.001 to 0.001 (−3 to 3% of site-incoming total barium) Both average and range expressed near equilibrium conditions generally, neither highly dissolving nor highly solids forming but some solids resuspended/redissolved 
Comparison cooler sub-location −0.001 Most exacerbated the reverse of solid formation 
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