4809 BELVEDERE AVE 2016-01-01 MF Import

n��ti� ix, zooa Mr. Jim lhomas Rclvcdcrc Lo1s 32 �md 3J I.��A Job No. 4A088 Pagc 4 unJisWrbed anJ wclLdraincd, thc fresh till can (IfOVI(Il' CSCCIIIIi� IOLII1d�U00 5�:�)�]Of( with IiUlc sctUeuicnl expccicd. l'hc Vashon'I ill, howevcr, was nol cncuinticred k.; our test pils. 'I hc I?speraiicc Sand soils arc advancc oulwash sand scdimcnts consists of proglacial fluvial and lacustrinc dcposits laid down by slow-moving meltµ•atcr s�rean�s from the advancing bul distant �'ashon glacier. It is generally composed o£ light brown to light gray, well-sorled, fine-to- meJium-grained sand. It may include lenses of thin silt or coarse sand and small gravel locally. In confined situations, the Gsperance Sand soils are generally in dense to very dense slate. The I:sperancc Sand deposils, ho�acvcr, can sut�jcct ratlicr casily lo r:unwash crosioa and gullying, and may loosen up and slough lo its angle of repose when cxposed on slopes or man-made cuts with poor vegelation cover. ��he I�sperance Sand soils are quite permeable and is oRen saturoted at thc basc whcrc it is undcrlaiu by an impervious silt lo clay laycr. l hr Whidbcy fon,ialion is non-glacial rivcr flood-plain de�osils. It consisls of light-brown lo gr.iy, claycy, �inc-sandy silt wilh occasiun;�l gravcl. 'Ihc WhiJbcy fonnalion is gencrally vcry sliff Iu IiarJ in its cndisturbed nativc staic. It h:is a rclativcly low permcability and tends to perch gruundwalcc Sccpagc would cmcrge oul of slopcs where thc Whidbcy Conna�ion is cxposed on slupcs. When Ihe secpage pressure is liigh, the cmerging waler can erode the soils above thc scr�ia�c zune, and cnusc Ihc ovcrl}'in� soil mass in slnugh and coll:�psc. Thc Whidbcy formation .'.J'. 11�� l'llt I�Illli�'1�'�� '. �'I I�li' �iC��(�C�� :I11��`�III �8i C t'\�'��I:I�I�IiI. til litil ��il'�11 �I', 1 Il\UI � �O�V\ I�uur ��•r.l b�n�in�;s ��crc drillcJ on di,: ridge shclf jwrliun of Ihc luls tu cxplure (hc subsurl�acc cnndilions of thc lots. l cst Borings I anJ 2, locatcd ncar the crest of the stecp slope Ilanking thc c;isl sidc of Ihe uplanJ shclf arca were drillcJ t�i 1GS Icel deep; anJ Tesl f3orings 3 and �I, located i.iu �F �ssociA��rs, iNc. l sl�<;