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�8.B. - Page 122 5-Lot Residential Developzrzent Decezxiber 9, 2010 <br /> � <br /> 1i <br /> Detai�ed e�aluation of the site geology and potential geologic hazards, and anaZyses of�he soil <br /> for mold or other microbial content, asbestos {either man-made or natural�y occurring), <br /> percolation rates, corrosion potential, radioisotopes, hydrocarbans, or other chemical properties <br /> are beyond the scope af this xeport. Thzs report does not address issues in the domain of <br /> ca�tz�actors such as, but not lirnited to, site safery, �oss of volume due to strzppzng of the �ite, <br /> shrinkage of 501�5 during compaction, excavatabi�ity, shoring, temparary slope az�gles, an.d <br /> constr�action means and methods. Ancillary features such as swi�nming pools, temporary access <br /> roads, fences, light poles, and nonstructural fills are not within our scope and arE also not <br /> addressed. <br /> To verify that pertinent issues have been addressed and to aid in conformance with the intent ofr <br /> this report, it is requested that final grading and foundation plans be submitted to this office for <br /> review. In the event that there are any changes in the naturE, design, or locations of <br /> improvements, or if any assumptions used in the preparation of this report pro�e to be incorrect, <br /> the conclusion.s aa�.d recommen.dations contained herein should not be considered�a1id unless the <br /> changes are revzewed arzd the conclusions of thi.s report are verified or modified in writing by the <br /> geotechr�ical engineer. TI�e criteria pzesented in tk�is report axe considered preliminary until such <br /> time as they are verified ar modified in writing by the geotechnical engineer in the field during <br /> const�ruction. <br /> 2.0 GEOLOGIC REVIEW <br /> The subject site is located on lovv lying alluvial terrain on the easterri flank of the Santa Cruz <br /> Mountazns. Th� site sits on the northern bar�c of Redwood Creek whzch has incised down into <br /> �.Yze alluvi�m at t�e site, but has been channelized and concrete Iined. Brabb et al (1998) mapped <br /> the site as underlain by Pleistocene aged alluvia� fan and fluviai deposits. These deposits are <br /> described as dense gravely and clayey sand and or clayey gravel that fines upr�rard to a sandy <br /> clay. The alluvial fan deposits are averlain by Holocene aged stream channel cleposits a�sociated <br /> with Redwoad Creek, consistiz�g of pooxly to well sorted sands, silts, and gravel wi#h minor <br /> cobbles. The sitie and viciniiy l�a�re been rnapped within an earthquake-ind�ced liquefaction <br /> ha.zard zone (CGS, 2006a). Ground�vater has �een historica.�ly recaxded to be encountered <br /> appro�imately 10 to 20 feet below ground surface nearby, depending on a variety of fac#ors <br /> including the time of year(CGS, 2006b). <br /> 2 <br />