2215 MERRILL CREEK PKY BASE FILE 2018-01-01 MF Import

I � � ' {;:�c-i�� ... . �.'�� � � v �: I I �� I _ p�� . . , � � � : _ , .��.t�;,<,. . , N � . ., a.v,:��x, .. . .. . .:.,. _ . ...,. -�, . - � � � �� ' � ; �� ;; � �,�� ,:; . i Gco�Enginecis � ^�� 4 I �i The relatively impermeable unweathered glacial till inhibits the i H� � �M downwar3 movement of rainfall. Thus, a perched ground water condition r I �H Pi I I often develops at or slightly above the interface with the overlying � �W y F'� weathered zone. Cuts into the weathered soils during the wet season may E dtl�r ; encounter ground water seepage. Localized dilching to direct flows to � �� 14 sumps from wltich the collected water can be pumped may be appropriate to ._ ._- - i � keep water from ponding in footing excavations or on slab suhgrades. If , � ,� pervasive seepage zones are found, permanent interceptor drains may be p needed. � A preliminary grading plan is not available; ltowever, based on the � � Fa proposed range of finished floor elevations Ior the building, it appears , fN that considerable fill will t>e placed within the Uuilding footprint and . possibly along the north and northeasl' margins of the site. It is _ � �� imperative thaC tl�e fill be placed in accordance with our recommendations . ', ,.i �. witliin thr_ building areas to limit differential settlemen[s to within . .. i � � tolerable limits. We su�gest that all fill placed within Che Phase 1 and � I � ��i � 2 building areas he placed in accordance with tlte structural fill ' I I ( -. ,,q recommendations at this tine. Site preparation of tlte Phase 2 area should C�� w be limited to scripping vegetation and reworking the upper foot or so of ri ' fi1L ! t i � ,� SITF. PILEP4RATION AND IARTII{iORK � �� y We rccommend the building siCe (including Che Phase 2 building area), j � ;. parking area and all areas to be Sr��ed, be sCripped of vege�ation and � i 1 signi.ficant organic material. We expect that the strippinp, depths will Ue � I r_ I quite variable, altltough iC appears that a 6—indt minimum will be i I.9 i necessary in most areas. Greater depths will be necessary in areas i � supporting lhickly rooted growtii. Root �ys[ems for large Crees and stumps � �� . � shoul3 be grubbed. Tlte gruUbed and stripped macerial should he wasted i i � � a off—sile or used for landscaping purposes. , � ��. "� As menCioned previously, the siCe soils arc moisCure—sensitive and ' - - will be difficult to operaCe on and to compact during wet weatlier. Tliese M soils re.^.dily aUsorb moisture and are difficult co dry eut. Traffic— ability aC tl�e site under wec conditions is expected to Ue difficull' a�td btl 5 M i L. ��:� � 1�. "V '�{ .L. � � . ' �1' '� .l^V 1-�: � �1• . . � . . .. . � ' . . � . . . .-. .. . .. . . � . . . .. .