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• <br /> DATE JUNE 5 , 2001 <br /> TO : JAMES E . CHANDLER <br /> COUNTY ADMINISTRATOR <br /> FROM STEVEN J . DOYLE, P. E. <br /> INTERIM ASSISTANT DIRECTOR OF UTILITY SERVICES <br /> PREPARED GORDON E . SPARKS, P.E. � <br /> AND STAFFED ENVIRONMENTAL ENGINEER G ,� <br /> BY : DEPARTMENT OF UTILITY SERVICES <br /> SUBJECT : GIFFORD LANDFILL REMEDIATION <br /> CHANGE ORDER FOR CONSTRUCTION (LABOR) OF 4-INCH FORCE <br /> MAIN ALONG 41 ST STREET, EAST OF 43 RD AVENUE <br /> BACKGROUND <br /> The Remedial Action Plan for the Gifford Landfill prepared by GeoSyntec Consultants calls for a <br /> pump and treatment system to clean up the groundwater beneath the site. The groundwater will be <br /> pumped from one well at first, and possibly a second well in the future, and treated onsite to remove <br /> chemical contaminants . The treated water will then be disposed of by pumping to the sewage pump <br /> station serving the Humane Society. Because the Humane Society sewage pump station was not <br /> designed and constructed to handle the extra volume of flow to be generated by the treatment system , <br /> it had to be modified . <br /> The Humane Society sewage pump station discharges into a 4" diameter force main on 41 " Street that <br /> continues to 43' Avenue, then south to a sanitary sewer manhole that conveys sewage by gravity to <br /> the sewage pump station that serves the Sheriff's Department. The pumps at the Sheriff s Department <br /> pump station are not large enough to handle the additional flow to be generated by the groundwater <br /> treatment system . As such, the effluent from the Humane Society pump station had to be redirected to <br /> a force main located approximately 350 feet east of 43 'd Avenue. <br /> ANALYSIS <br /> The best and cheapest solution to the problem was to construct a relatively short run of 4" force main <br /> along 41 " Street from the point where the existing force main toms south at 43rd Avenue to the 6" <br /> force main leaving the Sheriffs Department at the north entrance to the facility. A plan was prepared <br /> and a permit was obtained from the FDEP for construction . Because the original estimated cost for <br /> labor was approximately $3 , 900, a Work Order Directive was given to the Utilities Department Labor <br /> Contractor. The work commenced on Thursday, May 10 `x, 2001 , and was completed on May 18, <br /> JUNE 199 2001 <br /> Ali � ► : 1 �� � ''-� � � <br /> - 95 - <br /> 41 <br />