Correspondence re: building new home/soil testing, etc.

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PROJECT NO: 305025 DATE: February 22, 2005 PAGE: 2 of 3 During our observations, we had access to the soil boring report performed by Advance Surveying and Engineering Co. (#0001203) dated September 1, 2000. The report indicated a soil profile of 2' of topsoil, underlain by firm, grey-brown sandy lean clay, inturn overlying stiff, grey sandy clay to the depths explored. The report indicated the underlying firm, grey-brown sandy lean clay is suitable to support foundation loads of up to 2000 psf. Please refer to the referenced report for specific details. OBSERVATION METHODS AND RESULTS Our observations of the mass excavation were performed on February 21, 2005, on an intermittent basis. Besides observing the exposed soils, we placed several shallow hand auger borings to explore the localized subsurface conditions to aid our judgments. The soils exposed and retrieved by our hand auger borings were classified in accordance with ASTM D 2488-00 and estimates were made of their strength properties. At the time of our observations, it appeared the excavation extended through the existing topsoil and approximately 1' into the underlying grey-brown sandy lean clay. We judged the exposed natural sandy lean clay to be in a firm condition, similar to the conditions described in the preliminary soil boring report for the project. The bottom of the excavation was generally level at approximately elevation 931'. After the exposed soils were judged suitable, pit-run clean sand engineered fill was placed to attain the planned footing grade and lower floor slab grade. Therefore, based on our observations, hand auger borings, and compaction tests, it is our opinion the soils observed are suitable to support the anticipated fill and foundation loads up to 2000 psf. COMPACTION TESTING �h,� y �lare�(�j compaction tests were obtained on February 2� 2005, on an intermittent basis. The compaction tests were evaluated according to the Moisture-Density Relation of Soils as designated by ASTM D 698-00 (Standard Proctor). The test results, attached, indicate the recommended minimum compaction level of 95% of Standard Proctor was attained or exceeded at the test locations and elevations.