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HOOK 104 PAGEi86 <br />In response to Commissioner Adams inquiry, Environmental Engineer (Utility <br />Services Department) Mike Hotchkiss, P.E., advised this project would be ready to go out <br />to bid in about a month and expected that construction would begin by May. <br />ON MOTION by Commissioner Adams, SECONDED BY <br />Commissioner Ginn, the Board unanimously authorized staff to <br />proceed with engineering, design, permitting and bid of the <br />above -referenced project as presented, as recommended in the <br />Memorandum. <br />11.H.3. NORTH COUNTY REGIONAL WASTEWATER <br />TREATMENT PLANT - ADDITIONAL SLUDGE THICKENING <br />EQUIPMENT; TEST HYCOR PRODUCT; NEGOTIATE CHANGE <br />ORDER WITH WHARTON-SMITH <br />The Board reviewed a Memorandum of January 7, 1998: <br />::2-,%T_7: JANUARY 7, 1998 <br />TO: JAMES E. CHANDLER <br />COUNTY ADMINISTRATOR <br />FROM: JAMES W. DAVIS, P.E. <br />INTERIM DIRECTOR OF UTILITY SERVICES <br />PREPARED ROBERT 0. WISEMEN, P.E <br />AND STAFFED ENVIRONMENTAL ENGINEER <br />BY: DEPARTMENT OF UTILITY SERVICES <br />SUBJECT: NORTH COUNTY REGIONAL WASTEWATER TREATMENT PLANT <br />ADDITIONAL SLUDGE THICKENING EQUIPMENT <br />INDIAN RIVER COUNTY PROJECT NO. US -97 -22 -DC <br />BACKGROUND <br />The North County Regional Wastewater Treatment Plant presently has a <br />boat clarifier system to separate the solids from the treated liquid <br />ream after aeration in the oxidation ditch. Due to the desian <br />=.•_iguration -_-�f the ;boat clarifier, the solids blanket accumulation by <br />t:.e boat clarifier does not concentrate solids as effectively as _- <br />W <br />uld through a conventional circular clarifier. It produces less than <br />J.15 percent solids as compared with 1.0 to 1.5 percent if it ;gent <br />a :_=,rent_cnal circular clarifier. <br />This differential in the percentage of solids is converted to the %7oiume <br />liquid that must be wasted from the process train every day, where it <br />.._rest- _ affects the number cf truck haulings to the sludge treatment <br />`3cilit Although the boat clarifier has the least manpower <br />January 20, 1998 <br />.o <br />G <br />