2130 116TH ST SE Geotech Report 2018-01-02 MF Import

�� C H �Hxtn yxH �H� "�d rx+'� �� OM ��g � V �] t"y� Hy y n�y �HG� H C� tn �y G45CADE GEOTECHNICA� April 3, 1991 Bill Graber Job No. 9103-07G Paqe 4 does not become wet prior tc concrete placement. could be found at depths ranqinq between six (6) southwestern portion of the site to four (4) southeastern portion of the site. Bearing soil inches in the feet in the We understand from our conversations with you, that the garage will have a slab-on-qrade floor, while the rest of the house will have a crawl sp�ce. �Ie recommend that a four (4) inch layer of clean sand, pea qravel or crushed rock having less than five (5) percent material passing the X200 sieve, based on the fraction passinq the P4 Fieve, should be placed below the slab as a capillary break. At the time of our visit, moderate to very heavy seepage was observed in our test pits between two (2) and four (4) feet below the ground surfacP. We expect that some ground water might be en.:ountered in the excavations during construction. Dewatering should be anticipated during ccnstruction to avoid significant difficulties due to seepaqe into excavations. UDSERVATIONS In a subsequent visit to the site, we confirmed bearing soils in the footing trenches for the pronosed house. The contractor/owner backfilled the footing trenchee with two (2) inch quarry spalls, which were compacted adequately with the bucket of a trackhoe. The prepared surface was suitable for. �he support of structural loads designed for 200o psf maximu.n safr_ b�arinq capacity al' that time. e e a We expect the on-site conditiuns to retlect our findings. liowever, some variations may �ccur. Should soil con.9itions be encountered that cause concern and/or ara not discussed herein, we should be