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HUMIDITY CELL TESTS <br />pH of sample ieachates <br />800 - -- - .. <br />~~ <br />roo ' ,~ g <br />a' <br />eoo ~ <br />,~ 5.00 <br />h <br />G <br />Z 9.00 <br />4 <br />Z <br />4 3.00 <br />2.00 <br />L00 <br />/® <br />~+-- _ ~' <br />0.00 -~--_~ ~. .i ~ ..._ i ~ - i t i <br />0 2 9 6 B <br />TIME (weeks) <br /> <br />l0 <br />