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~--~! '-" ~' ~i CAMP DRESSER & McKEE December 29, 1988 Dr. William F. Pilkington Health Director Cabarrus County HealthDepartment Post Office Box 1149 Concord, North Carolina 28026-1149 Contract Amendment for Consultin~A~reement Dear Dr. Pilkington: The purpose of this letter is to receive authorization to increase the upper limit of our consulting agreement for extra services related to the design and construction services for the second sedimentation basin at the Cabarrus County landfill. The current upper limit for the consulting agreement is $7,500. The original scope of services associated with this fee included the preparation of drawings and specifications for the new sedimentation basln, and our meetings to discuss a long range plan for solid waste in the County. Our original estimated cost for preparation of the drawings and specifications was based upon making only minor modifications to the drawings and specifications which we prepared for the first sedimentation basin. As a result of our experience with the construction of the first basin, however, we ~tually agreed to change both the design of the sedimentation basin and the coordination/contracting of geotechnlcal engineering services. In 'addition, we agreed to add geotechnical field work and a soils report on basin construction methods, as well as supervision of field inspection by Soil & Material E~gineecs to our contract. This was done to improve coordination of all engineering work. The County contracted directly for geotecbnlcal services on the first basin. Our additional costs, therefore, relate to: unanticipated design changes which had to be made to the drawings and specifications; the coordination and contracting with a geotechnical engineering firm to perform field work, a soils report, and inspection services; and, the geotechnical firm's fee which we subcontracted for directly (not including znspect~on services). Our total incurred costs for these extra services has been $11,575. Therefore, the new upper limit engineering services fee will be $19,075. If you have any questions regarding this request, please do not hesitate to call me. If not, please provide an authorizing signature in the space below and return two copies t~ me. We appreciate the opportunity to continue to serve Cabarrus County. Very truly yours, ca~ D~SSE~ ?~c~E~.~ /~hn L. Rbber~s, P.E. For Cabarrus County ~..!: ~ V~ce President ~ -0LR:tas Date '