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Lutzky Associates Development LP - Geolechnical Investigation <br />MACTEC Project 4953-03-2631 <br />September 18.2003 <br />Laboratory tests were performed on selected samples obtained from our borings for correlation <br />with CPT data, to aid in the classification of the soils, and to determine the pertinent engineering <br />properties of the foundation soils. The following tests were performed on samples from the <br />current boring: <br />• Moisture content and dry density determinations, <br />• Direct shear, <br />• Consolidation, <br />• Percent passing No. 200 sieve, and <br />• Expansion Index. <br />In addition, we also relied on results of corrosion testing performed during prior investigation by <br />Geotechnical Professional Inc. (1997). The results of prior corrosion study are presented in <br />Appendix A. <br />All testing was performed in general accordance with applicable ASTM specifications. Details <br />and results of our laboratory testing programs are presented in Appendix A. <br />5.0 GEOLOGY <br />5.1 GEOLOGIC SETTING <br />The site is located on the Coastal Plain of Orange County, approximately 3 miles east of the Santa <br />Ana River and approximately 3 miles north-northwest of the San Joaquin Hills, at an elevation of <br />approximately 42 feet above mean sea level (U. S. Geological Survey datum). The coastal plain is <br />underlain by a deep structural basin known as the Los Angeles Basin. The site is underlain by <br />approximately 850 feet of Quaternary sediments that are underlain by a thick sequence of Tertiary <br />sedimentary rocks. <br />Regionally, the site is the Peninsular Ranges geomorphic province. The province is characterized <br />by elongate northwest-trending mountain rides separated by straight-sided sediment-filled valleys. <br />The northwest trend is further reftected in the direction of the dominant geologic structural <br />features of the province that are northwest to west-northwest trending folds and faults, such as the <br />Newport-Inglewood and Whittier fault zones <br />mieles:n»0it,fi='tidA,H#N'stoef·fh@.situ,4trgptive.low . <br />3