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• , . - <br /> . , <br /> IDGEJOHN W.GEE,P.E.,CONSULTANT <br />' CHARLES N.BAINBRIDGE,P.E. <br /> & ASSOCIATES EDWIN V.MILANSKI,a.E. <br /> SKI Consulttng Engineers CHARLES R.HUNSINGER,P.E. <br /> MICHAEL H.PRICE,P.E. <br /> STEVEN G.BAINBRIDGE,P.E. <br /> April 29, 1992 <br /> Sanitary District of Decatur <br /> 501 Dipper Lane <br /> Decatur, IL 62522 <br /> Attn: Mr. R. P. Kaptain <br /> Executive Director <br /> Subject: Oak Grove Sewer Area <br /> Infiltration/Inflow Study <br /> Phases III & IV <br /> Engineering Services <br /> Dear Mr. Kaptain: <br /> In response to our recent discussions, we propose to proceed <br /> with Phase III and Phase IV of Oak Grove ,Sewer Drainage Area Study as <br /> recommended in the Preliminary Report dated March 1992 . The Oak <br /> Grove Sewer Drainage Area Study was begun in 1990. It was originally <br /> conceived that the report would proceed in four phases. A contract <br /> to complete Phases I & II was dated December 20, 1990. The Prelim- <br /> inary Report, which was completed in May 1992 , recommended proceeding <br /> with Phases III and IV in order to investigate the internal condition <br /> of the lateral sewers. <br /> The scope of services shall include the televising and ditch <br /> flooding of several selected sewers as recommended in the Preliminary <br /> Report; evaluation of the results of this testing; a cost effective <br /> analysis of alternatives to reduce surcharging of the Oak Grove <br /> Interceptor, and the preparation of the a final report with our con- <br /> clusions on the feasibility of reduction of inflow. The cleaning of <br /> the sewers prior to televising is not included in our services. It <br /> is expected the City of Decatur and the Sanitary District will clean <br /> their sewers prior to televising. <br /> We propose charging for these services for time actually spent <br /> on the assignment in accordance with the following: <br /> A. A service charge, being the technical payroll cost to <br /> us of each employee engaged in the pursuance of the <br /> work and for the actual time engaged in the work times <br /> 2 . 0 to cover overhead and profit. <br /> 1670 S.TAYLORVILLE ROAD ■ 2171423-8600 ■ FAX 2171423-8677 ■ DECATUR,ILLINOIS 625P1 ', <br />