500 LAUREL DR 2016-01-01 MF Import

Geotechnical Engineering Study 00-2267 Three Story Addition - 500 Laurel Street, Everett January 31, 2001 Page 7 ` down to a point about fifteen (15) to twenty (20) feet above the railroad. From tiiis point the slope becomes almost vertical again down to the ed5e of tfie railroad bed. The majority of this slope, below the near vertical bluff crest, is covered with a moderate to heavy growth of brush, berry vines, fems and !ong field grasses. In addition, there are several old deciduous tree trunks, which have all been topped in the past, located on this slope. The adjacent slope, particularly to the southwest, supports a somewhat heavier tree growth. We did not observe any visible evidence of shallow or standing water on the site at the time of our field study. Subsurface General: In orderto evaluate the in-place soil and groundwaterconditions beneath the area of the proposed addition, and as a means of more accurately n�odeling the condition of the upper portion of the westem slope, we drilled an exploratory boring just inside the footprint of the proposed addition. ThP approximate boring location is shown on the Site Plan, Plate 2. We have provided a pictorial depiction of the soil density versus depth (determined by the recorde� SPT blow counts) as Plate 3. More detaifed descriptions of the materials ancountered at the boring location are pres�ented on the boring log contained in Appendix A to this report. The following is a generalized description of the subsurface conditions encountered in our field exploration. Soil Conditions: Immediately beneath a thin, approximately two inches deep, surficial layer of coarse angular crushed rock driveway surfacing material we encountered a stratum of inedium dense, silty fine to coarse sand with traces of �iay. We classified this material, which extend to a depth of about two feet, in general accordance with the Unified Soil Classificafion System (USCS) as a SM. Beneath this surficial stratum we then encountered about three feet of inedium dense silty fine to coarse sand, also classified as a SM by the USCS. This stratum is, in turn, underlain by about eleven (11) feet of light gray-brown to blue-gray silt which also contains small amounts of fine rounded gravel. This rr�aterial is classified by the USCS as a ML.