1415 75TH ST SW BASE FILE 2016-01-01 MF Import

� a 0'Donnc)1, Drigiiam 6 Partners, tl. W. E-1548 May 19, 1901 Page 5 At tlie time of our field study, water was observed ir� exist- iny wl�eel rute on the east siLe. The swamp area on the west site was covered by up to approximately four (4) feet of watee wliicli was gently flowing from soutti to north. In addition, shallow surtace water was also observed in wheel ruts on the �destern site. Subsurface The two sites are, generally, imme�3iately underlain by approximately three (3) to twenty-Eour (24) inches'of topsoil, and the test pits encountered relatively similar conditions on both sites. East Site Oeneath the surficial topsoil layer the eastern site i� underlain by one (1) to tliree (3) feet oE loose to medium dense, reddisti•-t�n to tan, moist to saturaled silty sand with gravel. Test Pits TP-4 and TP-5 at Che west end of Uuilding 3 encounter- ed approximately two (2) feet of loose, wet, Eill overlying the topsoil layer. Underlying tl�e silly sand stratum, and to the depths erplored, all tlie test pils on tliis site encountered dense gravelly, ailty sands containing occasional cobbles, (glacial till). These till soils exlend to considerable deptli beneath the deptl� explored. West Site With the following �x�eptions the western site is s?milar to the east site. Test Pit TP-1� in the northwest corner of the slte encountered approximalely six (G)� teet of loose, wet, gravelly, silty sand fill. 'flie lower two (2) Leet oE fill mainly consisted of mixed wood debris and topsoil. Delow the fill is about two (2) feet ot loosc gravelly. silty sand with clay, organics and topsoil. Oenealh this ]ayer the test pit encountered, and was terminaled'in, a den�e gray gravelly silty sand till material. Test Pits TP-21 and TP-2� near tlie south- west corner oE Building 4 encountered surficial loose, wet, gravelly, silty sand fills conlaining clay pockets and aspha �hunks. Underlying tlie fill in TP-21 was n sliallow layer oE red-tan, medium dense silty gravelly sand tlien, to the depth , explored, a dense, gray-tan, gravelly silty sand till. Beneath the surficial fills in TP-20 a l:wo (2) fo�t layer of soft, brown . peaty organic silt, overlying about three (3) feet of soft, brown, fibrous peat, was encounlered. The peat was underlain by a medium dense brown sandy gravel, to the depth explored. , [arlh Consuhan:s, Inc.