729 100TH ST SE Geotech Report 2018-01-02 MF Import

� , 'ID L. NELSON AND ASSOCIATES, INC. i � Consulung Engmeering Geulogy i April 7, 1989 , A Pro�ett No. 3989 i Page 2 � LOLATION b SITE OESCRIPTION , j � The investigated site area is located ,�ust east of the existing Millstone Coffee, Inc. building, located at 729 - 100th SE, in Everett, Mashington. Presently, the site erea has exposed fi11 soils end is rough graded. Recent � filling and grading operations were apparently performed to echleve the I c,�isting grades. Existing development occurs to the west and north, and a I � drainage erea v+ith netive vegetation occurs to the eas!. � SOILS CONDITIONS � The subsurface soils stratigraphy can best be seen on the pnclosed boring logs. In general , the site was found to be underlaln at depth by dense glaciel soils, Mhich are overlain by relatively compact artificial fi11 . � Ali borings performed vrithin the slte area encountered a basal deposit of � glacial drift, consisting of grey-brown, dense, gravelly silty sand. These deposits were encountered at depths beiav about 3 to �1.5 feet belov+ grade. In some areas, the native soils were found to have stratified silty sand end gravelly silty sand, within the upper portions of the deposit. Overlytng the basal netive glaclal drift deposits is a 0.5 ta 3 foot thick leyer of coarse crushed rock artificlel f111 , found ta be generally tliicker twvard the south. The surficial so11s encountered within the stte were also founJ to consist of artificlal f111 (controlledl, consisting of grey, medium dense to dense, mixed silty sand with gravel . The surface fi11 was generally found to be about 1 .5 � to 3.5 feet thick. � HYDROLOGIC CONDITIONS � A perched ground water table was encountered in all borings performed around the site eree. in general , this perched ground water was found to o�cur within the coarse crushed rock layer, but Mas also indicated within some ereas �' w of the laver portlo� of t�e surflcial f111 materlals (see B-2, B-5 8 8-61. �