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Allestad <br /> June 18 , 1990 <br /> degrees and maximum vertical height estimated to be on the <br /> order of 15 feet. Makshift wooden revements were observed <br /> at the north and south ends of the east slope which were <br /> supportinq up to about 4 feet of the upper slope at near- <br /> vertical angles. At the north end of the east slope we <br /> observed asphalt and other debris lyinq on the surface. We <br /> observed no ground cracks or other evidence of gross <br /> instability on the site. <br /> Subsoils <br /> Our evaluation of the subsurface conditions was based on our <br /> observations of the exploratory test pits. Fill soils were <br /> encountered to depths ra�ging from about 1.5 to 9 feet ir. <br /> all of the test pits except TP-2 located at the southeae,t <br /> corner of the proposPd site. The fill soils observed ranged <br /> from loose to dense brown/black to refl brown/gray brown <br /> silty sand and gravel with some wood and debris. Contact <br /> between the fill and natural soils was generally marked by <br /> a red-brown silty fine sand strata and at one location by a <br /> black organic topsoil layer. <br /> Natural soils at the site were generally observed to be a <br /> sequence of upper weathered ioose to medium dens= red-brown <br /> fine silty sand underlain by gray-brown dense to very dense <br /> silty sand or clayey sand. The upper weathered soils ranged <br /> in thickness from about 2.5 to 4.5 feet at the test pit <br /> locations. In TP-1 a glacial till-like deposit consisting <br /> of a very hard mixture of silt, clay and sand with rounded <br /> gravel was encountered below the weathered soils. <br /> Excavation of the till-like soils was very difficult for <br /> the backhoe. <br /> Ground Water <br /> During excavation of Test Pits no ground water or seepage <br /> was encountered. Moisture content of the soils was <br /> classified as only moist. No wet soils were encountered. No <br /> seeps or springs were observed in the site area. <br /> Subsurf�.r_e Variations <br /> Based on our experience, it is our opinion that some <br /> variation in the continuity and depth of subsoil deposits <br /> and subsurface moisture should be anticipated. Due to the <br /> depositional characteristics of the natural soils and <br /> seasonal, moisture variations- care should be exercised when <br /> interpol�ting or extrapolating subsurface soils and moisture <br /> conditions between or beyond our test pits. <br /> Fill depths are expected to vary over the site, dependir,g on <br /> the original natural ground surface, previous grading and <br /> any previous onsite structures. <br /> Page No. 3 <br /> Project No. 90-122-01 <br />