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Cq�CqpF GEOTECHNICAL INC• <br /> � Job No. 9207-0SG <br /> j August 6, 1992 <br /> presented in Appendix C. The test pit termination depths ranged behveen 0 and 9 feet. <br /> ; With the exception of the hand dug test pit (HDTP 1), we limited our subsurface investigation <br /> . to the areas underlying the building envelope. The subsudace exploration disc:osed the soil <br /> I, conditions to be relatively uniform across the site. <br /> The site was underlain at shallow depths of 1 to 4 fcet by uncontrolled fill. The fill consisted <br /> _ of silry sand, with gravel, roots, and organics. The difference in amount of fill between Test <br />� • '�-� Pit 4 and Test Pit 2 is relative to the change in the original slope of the lot. The fill probably <br /> j �:;�:"` I <br /> i ; . I � originatad during the development of the adjacent lot, and was placed to give the residendal lot <br />� �� a more horizontal appearaece• This Plateau slopes downward at 5 degrees, and stretches from <br /> I' � � �- the curb westward for approximately 38 feet. In Test Pits 1 and 2, a one foot strata of topsoil ; <br />�' � ' ' .-• and buried wood was noted below the uncontrolled filL <br />� .� . <br /> j ';; . -� Underlying both the uncontrolled fill and topsoil was a strata of silty sand with gravel, moist to ! <br />' — damp, medium to fine grained, medium dense, and gray i� color. Evidence of a perched and <br /> -' fluctuaung water table was given when mottled soils were observed in test pit 4. <br />� `�.1 ` I -' The southeast corner oE the lot is not covered by uncontrolled fill. 'Phe underlying material, a <br /> I ,�� silty sand, is consistent with the native material found in all the test pits. <br />, ; Caving was observed at shallow depths of 2 W 5 feet; heavier caving was observed at depths <br /> �, _ <br /> ti :>�+ : r below 5 fcet. <br /> All of the test pits located within the building envelope were overlain by the thick, lawn grass• i <br /> , <br /> The hand dug test pit was iocated on the face of the steep slope. 'fhe shallow termination depth <br /> , of the test pit yielded the consistent, silty sand that was found under the uncontrolled fill in test <br />� 3 <br /> � <br />'i — <br />� <br />