6907 COLUMBIA CT 2016-01-01 MF Import

� DAVID L. NELSON AND ASSOCIATES, INC. � Consulting Engineering Geology � Ms5• 31 , 1991 Project No. 4791 Fage 3 4� � glacial till. The basal glacial till was found below about 2.2 to 4.5 feet � below grade across the proposed building area. We encountered above the till in TP-1 materials consisting of grey-brown to grey, medium dense to dense, � poorly sorted slightly silty to silty sa�id with :cattered gravel and cobbles, M considered a glacial outwash deposit. These materials were encountered at �� depths below about 0.8 feet below qrade. � Overlying the �lacia: till are deposits consisting of grey-brown, medium �$ dense, silty sand with gravel, considered weathered glacial till. This strata � -; was found to vary from about i to 2.6 feet thick. 11 � Native surficial soils, consisting of about 1 .5 feet of red-brown, loose, ', silty fine sand with roots was encountered above the weathered glacial till. Is Overlying the native soils within the area of TP-2 is a surficial strata of mixed fill. This fill appears to consiet of about 1 foot of grey and brown k� � �y loose, intermixed silty sand, understood to have been placed in the past. We expect that other local fills may exist within this general area. I � 1 ? HYDROLOGIC CONDITIONS I � � � Ground water was not encounterad in any of the test pits. However, some IA evidence of seasonal seepage was indicated at the upper contact with the � t giacial till. This is considered a common condition during the normally � wetter periods of the year, where surface precipitation does not readily � � penetrate the dense glacial till, and generally flows laterally, and downslope, witnin the weathered zone above the dense till. No areas of I standing water were observed on site. ii � ' SLOPS STABILII7 � i � Explorations and observations withii.. the area above the moderate to steep t� slope portions of the site indicate that the slopes appear relatively stable, i � .