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File No. C6-2487-R1 <br /> November 9, 1987 <br /> <br />expanded or refined in order to fulfill the purpose of this study, or that the <br />scope of the work can be cut back back because the cause of the distress has <br />been determined early on in the study. The following is a description of the <br />work that we propose to perform. <br /> <br />1. Consultation with the City of Pleasanton, preliminary site <br /> reconnaissance by a principal engineer and a principal geologist from <br /> our firm, and setup of the project. <br /> <br />2. Detailed mapping of the distress features visible at the site. It is <br /> our understanding that the City of Pleasanton will provide a recent <br /> air photo of the site which would be used as a base map for the <br /> distress mapping. It is estimated that this mapping will take a two- <br /> man crew a full day. <br /> <br />3. Aerial photographs dating back from the late 1930's or 1940's through <br /> to the present time will be examined to determine the past use of the <br /> site, and previous topographical features that could be having an <br /> impact on the current park. If recent photographs are not <br /> available, new photographs (conventional black & white and infra- <br /> red) of the park may be taken. The mapped signs of distress will <br /> be overlaid upon an enlargement of an older aerial photograph in an <br /> attempt to correlate the observed signs of distress and the pre- <br /> development features. <br /> <br />4. The available documentation that is on file at the City of Pleasanton; <br /> plans, maps, letters, and reports regarding this site and adjacent <br /> sites will be reviewed. Personnel from the City that are involved <br /> with the Park in some manner will be interviewed so that the <br /> individual pieces of knowledge regarding the park can be brought <br /> together and analyzed along with the other available data. <br /> <br />5. The available data on groundwater levels in this area will be <br /> analyzed to determine if recent fluctuations in the groundwater may <br /> have had an impact upon the site. <br /> <br />6. Several testpits will be excavated along the location of the existing <br /> cracks. The testpits will be logged and the cracks examined to <br /> determine if their orientation can provide information regarding their <br /> formation. It is our understanding that the City of Pleasanton will <br /> be able to provide a backhoe, an operator, adequate shoring, and a <br /> laborer for this stage of the work. It is anticipated that this <br /> operation will take one of our two-man crews between 3/4 and 1 full <br /> day. <br /> <br />7 & 8. Several exploratory borings will be drilled, and soil samples will be <br /> obtained from the borings. The soil samples will be returned to our <br /> laboratory, and selected representative samples will be tested to <br /> determine some of their relevant physical and engineering <br /> characteristics. The purpose of this part of the study will be to <br /> develop a representative soil profile for the site, determine the <br /> <br /> 2 <br /> <br /> <br />