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ECKLER ENGINEERING, 1NC, December 4 , 2008 211 - 001 . 03 Mr. Bob Lawson Arcadis U . S . , Inc . 2081 Vista Parkway West Palm Beach , FL 33411 Dear Mr. Lawson : Reference : Eckler Engineering 's Additional Services Rockridge Mitigated Sewer System Indian River County Eckler Engineering has provided significant design and construction services beyond the original construction scope . We are requesting a modification to our original agreement due to the additional services we have completed during the construction of this project . Please submit this request to Mr. Larry Brown for his review and approval by the County. Eckler Engineering has provided additional services beyond thatwhich was in the original contract for services during construction . Eckler Engineering has provided the following additional services during the construction of this project: 1 . We had to visit the project site on three separate occasions for startup of the vacuum pump station and for flow testing of the collection system . Airvac , Inc . had problems in their control panel with the instrumentation and control system and the contractor was not fully prepared for the testing which caused the first two attempts at testing the system to be aborted . We were finally able to successfully test the system on our third attempt. This work took an additional three days for two people to complete this task . 2 . Eckler Engineering has worked with the County's request for DATAFLOW Systems , Inc. to provide SCADA services to the vacuum pump station . In order to get the SCADA system to provide the signals requested by the County, Eckler Engineering has had to provide the coordination between Airvac, the supplier of the control panel , DATAFLOW , and the County. We first verified what the County wanted to monitor, determined that these signals were available within the Airvaccontrol panel and then coordinated the transfer of these signals from the Airvac panel to the DATAFLOW system . This effort took a while since Airvac uses a 120 volt control system and DATAFLOW uses a 24 volt control system . We also needed to find a way to obtain signals directly out of their PLC control and how to arrange these additional controls and connection points within the existing panel and still meet UL requirements . This effort has taken approximately two man weeks to complete . T We added the hydrogen sulfide sensor into the plans and modified the control system to accept the signal from the H2S sensor. l 'eIvitrttrl' t g t, ttir 23rd Yea 11 ( St' ri to It IIf 'Ito IIIIt I1,fAt it It $ r ^, NdF7 `„nk. firell'C ` itrlr ri=j . +`A, 4 ( ,r, idCt k rP1 Y;T r I v_ V