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EP 3 1991 BOOK CHANGE ORDER 2 W/DIVERSIFIED DRILLING CORP. - ENGINEERING INSPECTION SERVICES Capital Projects Engineer McCain reviewed the following: DATE: AUGUST 22, 1991 TO: JAMES E. CHANDLER COUNTY ADMINISTRATOR FROM: TERRANCE G. PINTO DIRECTOR OF UTIL S ICES PREPARED WILLIAM CAIN AND STAFFED CAPI OJ C S ENGINEER BY: DE FUTILITY SERVICES SUBJECT: CHANGE ORDER NO. 2 WITH DIVERSIFIED DRILLING CORP. AND ENGINEERING INSPECTION SERVICES BACKGROUND On May 21, 1991, the Board of County Commissioners approved Change Order No. 1 with Diversified Drilling Corp. With Change Order No. 1, we drilled out an 80 -foot concrete plug at the bottom of the new well No. 3. This was done in order to increase the well's production capabilities; it was, however, only partially successful. We have increased the production rate to approximately 300 gpm with: conductivity readings around 1800 micro -mhos and a chloride level around 700 ppm (which is well within and below the acceptable limits). We now wish to drill deeper, under the observation of the engineer's hydrologist (see attached copies). ANALYSIS By drilling Well No. 3 to a deeper depth, approximately 960 feet, we hope to increase the production level to 500 gpm, which is in line with the existing good well (No. 1) at the North Beach facility. The County and the engineer concur that the well in its present state does not satisfy either the County's or the regulatory agencies' needs. We are proposing two parts to our recommended approach; first, we will instruct the driller to continue drilling in 10 -feet increments, stopping at each level to run both specific capacity tests and chloride level tests. one of two things will occur; either capacity will increase to an acceptable level with low chlorides, or chlorides will rise to unacceptable levels and a new well site will have to be found. We anticipate going only 60 + feet deeper, which corresponds to the depth of Well No. 1, which is the good one. Additional cost associated.. with this procedure is $4,600.00; this takes into account drilling an additional 100 feet in depth. (See attached Change Order No. 2.) , Secondly, we feel due to the critical nature of the above procedure, we must have the engineer's hydrologist present throughout the extended drilling. The cost for these inspection services is -$4,139.00 and is minimal in light of the project's magnitude. (See attached Camp Dresser and McKee Inc. proposal.) RECOMMENDATION The staff of the Department of Utility Services recommends that the Board of County Commissioners- approve Change Order No. 2 with Diversified Drilling Corp., and the referenced engineering services with Camp Dresser and McKee Inc. 22