| http://www.w3.org/ns/prov#value | - The average initial pH of the contaminated medium before the addition of bicarbonate may be in the range, for example of about 6.0 to 8.0, preferably about 6.5 to 7.5, the initial pH of the contaminated medium being defined as the pH of any aqueous phase present in the medium before the addition of bicarbonate.
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