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Page 2 <br /> July 27, 1989 <br /> Job No. 7969.000 <br /> <br /> Beginning in 1964, the evaporation ponds began to be filled in, <br /> primarily with soil and construction debris in a north to south <br /> direction. At the time of our previous soil investigation in 1985, <br /> portions of two of the southernmost ponds remained unfilled. <br /> Filling of the ponds was completed within the past few years. The <br /> existing fill in the evaporation pond area extends to depths of <br /> about 8 to 10 feet, and is of unknown compaction. Debris primarily <br /> consists of concrete, asphalt, and pieces of metal. The site is <br /> presently used as the City Corporation Yard and houses offices, <br /> maintenance shops, garages, and storage areas. <br /> <br /> The purposes of our investigation will be to gather additional <br /> information on the nature, distribution, and characteristics of the <br /> earth materials and groundwater throughout the property, to <br /> evaluate the geologic structure of the site, and to develop <br /> geotechnical recommendations for foundation design and other <br /> aspects of the proposed development. The scope of our work will <br /> include a field exploration program with drilled borings, sampling <br /> of subsurface and surface soils, laboratory testing, engineering <br /> and geologic analyses, and preparation of a written report. <br /> <br /> Field Exploration <br /> <br /> We propose to drill 3 borings to depths of about 20 feet at the <br /> proposed location of the Senior Center building to provide <br /> geotechnical information for foundation design. Permits from Zone <br /> 7 will be obtained prior to drilling. Soil samples will be <br /> obtained from each of the borings at a minimum of 5-foot intervals <br /> and at any change in lithology. <br /> <br /> Laboratory Analyses <br /> <br /> Some of the soil samples from the borings will be selected for <br /> geotechnical laboratory testing, which will include moisture <br /> density determinations and Atterberg Limit tests to aid in <br /> classification and evaluate expansiveness, consolidation tests on <br /> compressible materials to allow settlement analyses, static <br /> strength determinations for foundation design parameters, and R <br /> value tests on near surface soils for pavement design. <br /> <br /> Analysis and Report Preparation <br /> <br /> The geotechnical laboratory test data will be analyzed in order to <br /> evaluate the subsurface conditions and to prepare geotechnical <br /> design recommendations for the proposed development. A written <br /> report will be submitted providing our conclusions and <br /> recommendations along with field and laboratory test data. <br /> Geotechnial recommendations will include: <br /> <br />BERLOGAR GEOTECHNICAL CONSULTANTS <br /> <br /> <br />