Laserfiche WebLink
April 7, 2008 <br /> Mr. Don Lcvin <br /> L&A Job No. 8A037 <br /> Pagc 5 <br /> Wc cxpcct lhc groundwatcr conditions at thc subject project sitc to bc similar to Uiosc at thc <br /> Rcfcrencc Sitc. Thc ncar-surfacc perchcd groimdwatcr would iluctuatc scasonally, depcnding on <br /> prccipitation, surf:icc runoff, vcgctation covcr, sitc utilization, ctc.. It may dry up complctcly in <br /> thc drycr swnmcr months and accumulatc and risc in thc wet wintcr months. Thc perched <br /> growidwatcr would tlow down-gradicnt along thc surf:�cc of thc undcrlying finc sandy silt <br /> dcposiL It is our opinion Ihc shallow perchcd groundwatcr should havc minimal impact on thc <br /> stability of thc stccp slopc within and bclo�v thc sitc, providcd that vcgctation covcr on thc stcep <br /> slopc Uc prescrvcd and maintaincd and that no conccntrat�d storniwatcr bc dischargcd <br /> uncontrollccl within thc subjcct sitc or onto thc adj�����u S���n Ston�. <br /> DISCUSSION AND RF.00111111ENDA'1'IONS <br /> LANDSI.IDF. IL�"l.ARU <br /> Thc subjcct projcct silc is mosl likcly manUcd by a thin laycr of topsoil undcrlain hy a laycr of <br /> dcnsc finc to mcdiwn sand aboul Z to ? fcet thick, which is in tum undcrlain by a hard finc sandy <br /> silt dcposit. Thc densc sand anJ hard silt soil I�ycis undcrlying thc subjcct residencc sitc arc of <br /> high shcar strcngth anJ ha��c csccllcnt resistancc against soil movcmcnt and slopc f:�ilurc. <br /> Nlhough thc slopc bordcring thc wcst sidc of Ihc subjcet siic stands at an indination ovcr 40 <br /> perccnt ��•ith a vcrtical rclicf of about 30 to 35 fcct, thc corc of thc slopc is fornicd �vith lhc dcnsc <br /> sand cmd hard silt soils. Thcrcforc, it ���ould bc unlikcly for dcep-scatccl landslides cutting into <br /> thcsc undcrlying compctcnt soils to occur on ihc sitc and, thcrcforc, thc landslidc hazard for thc <br /> subjccl sitc should hc minimal. <br /> f:ROS10N ILV',:UZD <br /> "I'hc surficial topsoil cmd thc ���cak soils in thc root r.onc draping Uic stecp slopc flanking thc west <br /> sidc of�hc subjcct sitc may bc crodcd if thcy arc dc��oid of�•egclation covcr and ovcrly saturated. � <br /> / � <br /> / I <br /> 1 <br /> LIU & ASSOCIA7'ES, INC. ( � � <br />