505 103RD PL SE 2016-01-01 MF Import

� LJ � � � � � � � � � � � � � � � � � CASCADE GEOTECHNICAL March 27, 1991 The December Partnership Job No. 9102-18G Paqe 4 The aubaurface soil conditions at this sitt qenerally consisted of topsoil and uncontrolled fill overlying peat, orqanic silty sand, and silty sand with some gravel and a trraa of cobbles. The uncontrolled fill was moist Tavel and ea trace ofis obblesbran to gray silty sand with soma 9 g feet of gray Eand with some silt. $et and brown2toablack,1ewet, or9anic black, wet to saturated peat, silty sand with some gravel, was observed below the uncontrolled fill. Underlying the peat and/or orqan:c silty sand in Test Pita /1 and �2 and in Test Borings N1 and k2 was gray silty sand with some gravel and trace cobbles which was densrainedergraYnsandnand gravel Wet, Some lenses of inedium to coarse-g were observed in this silty sand in our Test Pit �4 and in Teat Borinq X1 and 82• Test Pits �2, �� and �5 were terminated i�ions peat/orqanic silty sand horizon. For detailed soils descrip please refer to Appendix B and Appendix C. Minor seepaqe was observed in Test Pit �1 at � e t or anicWsilty feet below the exist�nq qround eurface in the p / 9 sand horizon. Heavy to very heavy seepaqe was observed at depths of ten (10) to twelve (12) feet in Test Pits �kl, M2 and N3. Very heavy seepage was observed at a depth of between five (5) and eleven and one-half (11 1/2) feet below the qround surface in Test Pit M4. This heavy to very heavy seepage was observed at the contact of peat(orqanic silty sand with the native silty sand. Ground water was encountered in Test Boring M1 at depths of between seven and one-half (7 1/2) feet and approximately nine and one-half �g l�Z) feet, and in Test Borinq �YZ between eight and one-half (e l�Z� and twelve and one-half (12 1/21 feet below the qround