1920 MERRILL CREEK PKY 2018-01-01 MF Import

i SHAN�_ON&WILSON.INC. � 7.0 cTTR.SURFAGE GONDITTONS The following geologic units were encountered in the borings and test pits completed at the Wp of the subject site: 1) surficial wpsoil, 2) fill, 3) origin:l wpsoil, 4) weathered native � soils, and 5) glacial till-like and till soils. Although not encountered in our ezplondons, I glacial outwash soils are knawn to underlie glaciai Hll at this site, as seEn in the slope exposures during our reconnaissance. I i T'he sur&cial topsoil was encountered in only a few explorations (test pits TP-7, TP-8, TP- 12, TP-13, and TP-1'n, possibly because the site has been clearefl and stripped once before. IThe topsoil wnsisted of moist W wet (generally wet), loose, brown, slightly gravelly to gtavelly, silty sand containing numerous organics. The thickness of topsoil n.nged from � about 6 to 18 inches belaw existing grade. I I The fill observed in the explorations consisted of moist to wet (generally wet), very loose to dense (generslly loose), grevelly, silty sand, with varying degree of�wod and ofganics. In � isolated areas, such as test pits TP-5, TP-9, TP-13, TP-ld, and TP-20, large stumps of wood and increased organic content we�e encountered. T'he thickness of fill ranged fcom 0 to about 4 fcet below the existing gnde in most exploradons, eacept for test pit TP-20 and Iborings B-2 and B-5 where it was up to 10 feet, and test pits TP-6, TP-9, and TP-14, which were excavated in the existing soil stockpites. Seepage was occasionally noted in the fill � soils. I Some of the test pits and boring B-2 encountered an organic layer below the fill, which was interpreted to be [he original topsoil layer. This matcrial was similar to the surHcial topsoil in composidon and densiry. Its thiclmess was generally on the order of about 6 inches, j except in test pit TP-6 and boring B-2 where it was about 12 inches and test pit TP-20 where it was about 24 inches. IThe weathered native soils consisted uf moist to wet, very loose to medium dense, uace of I gtavel to gravelly, silty sand, with occasional organics. These soils were encountered below the fill or original Wpsoil and, occasionally, direcUy from the existing gcound surface I downward. The weathered naflve soils graded gradually into the dll-like soils and we�e less than 2.5 feet thick, except in test pit TP-18 where they wene 6 feet thick. Groundwater I W-6693-01 7 I