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�vER C <br /> O� <br /> INDIAN RIVER COUNTY q <br /> PUBLIC WORKS DEPARTMENT <br /> STORMWATER DIVISION <br /> 180127" STREET ORIV <br /> VERO BEACH, FLORIDA 32960 <br /> Phone: (772) 226-1562 <br /> Rj MIN <br /> TO: Joseph A. Baird, County Administrator <br /> THROUGH: Christopher R. Mora, P.E., Public Works Director <br /> FROM: W. Keith McCully, P.E., Stormwater Engineer 4�0 <br /> SUBJECT: APPROVAL OF WORK ORDER NO. PCM-1 FOR SEDIMENT <br /> REMOVAL AT PC MAIN SCREENING FACILITY <br /> DATE: May 10, 2013 <br /> DESCRIPTION AND CONDITIONS <br /> The purpose of this Agenda Item is to request the Board of County Commissioners <br /> (Board) approve Work Order No. PCM-1 with EMC Divers, Inc. for sediment removal <br /> from the PC Main Screening Facility's treatment channel and sediment traps. PC Main <br /> is located in the Indian River Farms Water Control District's Main Relief Canal, north of <br /> the County Administration building complex. On April 23, 2013 the Board approved the <br /> Master Agreement for this work and this is the first Work Order under the Master <br /> Agreement. Collectively, the facility's two sedimentation traps hold approximately 148 <br /> cubic yards of sediment, equal to about eight 18-cubic yard dump trucks. Nitrogen and <br /> phosphorus are associated with many of the settable solids. Based on laboratory <br /> analysis, each sedimentation cell cleaning cycle (both cells cleaned) removes <br /> approximately 141 pounds of total nitrogen and 49 pounds of total phosphorus from the <br /> canal. These removals equal 35.25 and 24.50 forty-pound bags of 10-5-10 (N-P-K) <br /> fertilizer for total nitrogen and total phosphorus, respectfully. A significant amount of <br /> sediment containing total nitrogen and total phosphorus will also be removed during the <br /> cleaning of the facility's treatment channel. <br /> The cost of this Work Order is $14,600.00. <br /> FAIDublic Works\KeithM\Stormwater ProjectsNain Relief Canal Operation0redging Sedimentation Basins\Agenda Items\Agenda- <br /> Consent-Work Order#PCM-1 -4-22-2013.doc <br /> AR <br />