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LSORRISCN-KNUDSSN CQ MPANY,INC <br /> Mid-Continent Coal and Coke Company <br /> Page 3 <br /> 1. Pitcher Drilling Company <br /> 75 Allemany Street <br /> Daly City, California 94014 <br /> Mr. Richard Lake - 415/992-1500 <br /> Mobilization $ 3,300.00 <br /> Drilling & Sampling 7,700.00 <br /> TOTAL - $11,000.00 <br /> 2. Engineering Testing Labs (ETL) <br /> Phoenix, Arizona <br /> Mr. John Rosner - 602/268-1381 <br /> Mobilization $ 2,200.00 <br /> Drilling & Sampling 8,400.00 <br /> TOTAL = $10,600.00 <br /> Our recommendation for the drilling and sampling is to use Engin- <br /> eering Testing Labs. This is based in large on the fact that Pitcher <br /> Drilling proposes drilling with mud and ETL proposes to drill with air <br /> and case the holes. We doubt the refuse material will hold an uncased <br /> hole. In addition, the air drilling will provide a more useable seven <br /> foot interval of sample for the refuse coal recovery study. <br /> A total of four trenches to a depth of twenty to twenty-five feet <br /> are recommended to provide the additional data required for the refuse <br /> stability and refuse coal recovery studies. The exact location of the <br /> trenches should be determined after evaluation of the initial drilling <br /> effort. The trenches will provide bulk samples for the coal refuse <br /> recovery Study and insitu density test sites for the refuse stability <br /> study. <br /> LABORATORY TESTING <br /> Laboratory geotechnical tests need to be carried out on both the <br /> refuse and the foundation material of the present and proposed refuse <br /> piles to determine their physical properties. These physical proper- <br /> ties are to be used for stability analysis of the refuse pile. <br /> A preliminary program of the type and number of tests to be per- <br /> formed is given below: <br />