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~~ .~. <br />Table 3. Alkalinity and pH of Manipulated Effluent Samples and River Blanks <br />Sample Normality <br />(H:SO4) 400m1 Alkalinity pH pH after <br />adding NaOH <br /> Effluent <br />9 1110 6.9 NA <br />18 650 6.5 NA <br />27 95 5.3 7.6 <br />36 <5.0 2.7 7.9 <br /> Blank <br />9 <5.0 2.3 7.7 <br />18 <5.0 2.1 6.2 <br />27 <5.0 2.0 6.4 <br />36 <5.0 1.9 7.9 <br />-10- <br />COMMERCIAL TESTING & ENGINEERING CO. <br />o~nai Copy Water marketl <br />=o~ You: Pr o~eniOn <br />