4701 W GLENHAVEN DR 2016-01-01 MF Import

� � October 15, 1980 Pro�ect No. 8010-1 gi-Win Homea Page 5 our Yield notea suggeat that theae sediments were deposited during the Salmon Springe Glaciation (35�000 to 40,000 yeara before preaent) and are aesociated with the Poesesaion Drift seriea eoils. The atratagraphic poaition, soil texture, high deneity, and typically highly ozidized condition are oonaid- ered diagnostic of the Salmon Springa age soils. The accompanying teat pit logs best illuatrate the soils oc- curring within the areas investigated. However� in aummary� the entire site appears to be underlain by a sequence of interbedded, very denae� moderate to weakley cemented, fine sand, medium to coarse sands and sandy Erravels. Our �udgment ` regarding atratagraphic occurrance within the lower elevationa of the slope is based on observed soil outcronpings on ad�a- cent properties at similar elevationa. The basal soils are overlain by approximately ten (10) feet of hard, grey� lam- inated� clayey silts. The silta are exposed in the existing buil�iing cut and are in a denae stable condition. The upper eix (6) to eight (8) feet of soil in those areas sampled con- sista of a aequence of loose� grey-brown to greg, fine sand to eilt fill with minor clay. The uppermost three (;) feet of fill is typically rubble laden and includes large sections of reinforced concrete. At present, the building area excavation exposes dense, nat- ural, undiaturbed soils in the south portion and recent fill soila in the north. Conditions which would suggest hillside aprings or heavy ground•,rater seepage along the steep slope were not observed. However, vegetation which indicates a chronic' moiat or wet ground condition is common on the slope face. We would there- fore anticipate some lesaer degree of groundwater activity.