3609 SHORT ST 2016-01-01 MF Import

^ ,. / CASCADE GEOTECHNICAL December 29, 1989 �1 �i Job No. 8912-35G ��,��p�l Rick Graft � Paqe 4 Q CONCLUSIONS AND RECpAIISEND?�TIONS at the time of our visit, the excavation was duq down to a hard, gray, silty clay and clayey silt which was soft and saturated on � the surface due to wet weather exposure. Based on our observations, devalopment and use of the site will require that tha proposed foundation be seated directly on the undisturbed native soil consistinq of very hard silty clay, clayey silt end dense sand. Bearinq soil is located from two (2) to six (6) inches below the existinq ground level in the foundation arem. The very hard silty clay and clayey silt is suitable to support spread footinqs designed to a maximum safe bearinq value of 2000 psf as proposed if the soil is undisturbed and does not become wet prior to concrete placement. We recommend placinq a perforated, riqid, four (4) inch diameter drain line alonq the base of the base of the footinqs and tiqhtlininq it to the storm sewer system. The drain should be bedded and backfilled with a minimum of twelve (12) inches of pea qravel. The sco�e of our work does not include addressinq the stability of the western slope, latcral pressures or retaininq wall construction. . General We expect the on-site conditions to reflect our findings; however, some variations may occur. Should soil conditions be encountered that cause concern and/or are not discussed herein, we should be