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3/9/2010 <br />Primary Clarifiers -Existing Condi <br />o PC No. 1 built in 1938 <br />o PC No. 2 built in 1947 <br />o Concrete deteriorated <br />from exposure to <br />sewage <br />o Mechanical equipment <br />at end of useful life <br />o Overloaded during wet <br />weather <br />Primary Sedimentation Basins - <br />ExistingCondition <br />o Constructed in 1947 ~~ :;.ate ~~ Y ~x~,=x <br />o Out of service - <br />o Widespread structural <br />deterioration ~*~: <br />o Treatment capacity <br />reduced by 25% <br />9 <br />