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Escalon Subdivision Page 4 ; r May 30,2000 Seven (7) soil borings were drilled on the 68.26 acre parcel; one boring on each of the 10- acre+- lots. No ground water was encountered in any of the borings. The soil condition most commonly encountered was a loose to very dense silty sand generally present between the ground surface and the 2 to 6 foot depth. As indicated the site has been deep ripped by agricultural equipment to break up the cemented soils or hardpan. Pieces of the hardpan were visible in the soil matrix. The surface silty sand was underlain by various strata of very dense sand, very dense sand with silt,very dense clayey sand or very dense sand with clay.For a more detailed description of the soils encountered see the log or boring sheets (Plate No.s 2-8). Test boring logs show subsurface conditions at the date and locations indicated,and it is not ` warranted that they are representative of subsurface conditions at other locations and times. �. V DESIGN STUDIES AND RECOMMENDATIONS From a soil engineering standpoint,it is our opinion that the site is suitable for development ` of the proposed residences,access roads,and underground utilities,however, all of the conclusions and recommendations presented in this report should be incorporated in the design and construction to avoid soil and foundation problems. The main concern for the building pads is the variable loose surface soils that are the results of past agricultural and ripping activities. Although the deep ripping typically extends 4 to 6 feet,a majority of potential settlement has ` likely occurred due to cohesionless soil conditions, overburden soil pressure, and past ground cultivation. Consequently, only the upper 24 inches of proposed building pads needs to be ` "reworked" in order to sensify loose soil pockets and provide a uniform pad. Building Pad Grading r The site should initially be cleared of all surface organic growth as recommended in Appendix A,Engineered Fill Specifications. After clearing operations and any cuts have been made, r the loose surface soil should be over-excavated to a minimum depth of 12 inches and stock piled for re-use. The resulting subgrade after over-excavation should be scarified 12 inches, moisture conditioned if necessary, and recompacted as recommended in Appendix A. The over-excavated material may then be replaced and compacted as engineered fill. Fill placed on building pads should be placed as engineered fill as recommended in Appendix A. The over-excavated and filled area should extend a minimum of 5 feet beyond proposed footing lines. On site soils are suitable for use as engineered fill. r Soo P l ` s z a ti 9 SOS P