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M03086GE I~ 3.0 POST DESIGN CONSIDERATIONS The project geotechnical engineer should be consulted during construction of the project to observe site conditions and open excavations during construction and to provide materials testing of soil and concrete. , This slope stability analysis study is based on subsurface and laboratory information provided in our geotechnical engineering report for the conveyor system dated October 1, 1998, and cross section information provided by Mr. Jim Stover and does not include proposed site subsurface information; therefore, it is necessary to make assumptions concerning the subsurface conditions and assume that the subsurface conditions do.not vary greatly from those assumptions made during our slope stability analysis. Our experience has shown that significant variations are likely to exist and can become apparent during additional on site excava- tion. For this reason, and because of our familiarity with the project, Lambert and Associates should be retained to observe ~ excavations during portal bench construction and to obtain subsurface information and samples for laboratory strength tests to verify the assumptions made in this report. Lambert and associates should be retained to observe and test fill construction, to observe the geotechnical engineering aspects of the construction J and to be available in the event any unusual or unexpected condi- tions are encountered. The cost of the geotechnical engineering observations and material testing during construction or additional engineering consultation is not included in the fee for this report. We recommend that your construction budget include site visits prior to and during construction schedule for the project geotechnical engineer to observe foundation excavations and for additional site visits to test compacted soil. We recommend that the observation and material testing services during construction be retained by the owner or the owner's engi- neer or architect, not the contractor, to maintain third party 1 credibility. We are experienced and available to provide material testing services. We have included a copy of a report prepared by Van Gilder insurance which discusses testing services during con- struction. It is our opinion that the owner, architect and engi- veer be familiar with the information. If you have any questions regarding this concept please contact us. i We suggest that your construction plans and schedule include } provisions for geotechnical engineering observations and material ~ a I~ Lambert ana ~soociateo I ~ CONSULTING GEOTEON NtOAI ENGINEERS AHD J MATERIAL TESTING