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1114110MMai i a 3 <br /> = --1111 NMI <br /> UMW ■ VIM <br /> Joyce Engineering,Inc. <br /> 4660 South Laburnum Ave. <br /> Richmond,Virginia 23231 <br /> Tel (804)222-1182 <br /> Fax(804)222-1384 <br /> February 25, 1993 <br /> Mr. Gayle Wilson <br /> Solid Waste Administrator <br /> Town of Chapel Hill <br /> Public Works Department <br /> 1099 Airport Road <br /> Chapel Hill,North Carolina 27516 <br /> Dear Gayle: <br /> RE: PRELIMINARY GEOTECHNICAL INVESTIGATION <br /> LANDFILL SI'Z'E SEARCH, ORANGE REGIONAL LANDFILL <br /> JEI PROJECT NO. 229.00 /TASK 44 <br /> As you requested, we have updated the scope of services, schedule and budget for the <br /> preliminary geotechnical investigation from our April 13, 1992, letter to reflect the omission of the <br /> test pits from the proposed field work. The test pits were omitted in accordance with the request of <br /> the LOG in order to minimize disturbances to the sites during the field work. The primary <br /> purpose of the test pits was to log the near surface soils in detail and select representative soil <br /> samples for laboratory testing. The detailed logging of the soil and the clear view of the contacts <br /> between the soil strata that the test pits yield would result in a more representative estimate of the <br /> volume of borrow soil for liner and cover materials. By removing the test pits from the revised <br /> scope of work, the following two items will not be able to be completed during the field work: <br /> • detailed logging of the soil strata <br /> • selection of representative soil samples from a specific soil strata <br /> The information that would result from these two items are critical to the evaluation of the sites. <br /> Consequently, in order to maintain a comparable level of investigation without the test pits, <br /> additional sampling has been included in the soil test borings. The revised scope of work includes: <br /> • continuous sampling using a split-spoon sampler from a depth <br /> ranging from ground surface to 20 feet, in order to obtain a more <br /> detailed view of the soil strata; and <br /> • shallow composite samples collected from the auger flite as the <br /> auger is advanced, in order to obtain soil samples for laboratory <br /> testing from specific ranges of depth in the soil. <br /> Ars,J Printed on recycled paper <br />