8310 RIM DR Geotech Report 2018-01-02 MF Import

� Gcotechnical Lnginccring 6J.��onticn 8310 Rim Drivc- Ryan Novembcr 8,2004 RMI Pilc No. 21GOd Page 5 Am' dislurbcd arcus should hc reslabilizcd as soon as possiblc through vcgetation planting or other approved means. Within cxposcd soil arcas, veget�tion planting, hydro-secding, and/or straw mulcliing arc cffcctivc mcuns tn minimizc crosiun and nllo�l� vcgetntion to bcgin rapidlv. All c�cavntion sn�ils should be_,;vcred with ,ilnstic in thc cvent nf rain to minimizc thc potcntial for erosion and siltntio:: Surfacc Drainagc It is dcsirnblu that posi�ive surface drain�ge be provided so as to direct surface ��ater awny from lhe crest oi the slope and the foimdmions of the building. Ponding of surfuce water should not be allo�sed ndjaceni to thc vtructurc or thc slopc. It ie rccommcndcd that thc ground surfncc nc�t to thc building be slopcd at nbout 3 dcgrccs a�v�y from the buiiding for n minimum of 10 fcet. It is imperntive thnt concentrated watcr Ilo�c nul bc �illuacd n�ross anv clopcs �-. :n��ion or�vcakening of surtacc so��s could occur. �ubsurfs�cc Crainagc ►t is good practice to use e�terior fuoting d,ains around all oP the structures �vhere moisture con6-ol :s important. Pooting drains should be iu�;a!'ed nt Icast I loot oelow the pinno-,:d finished floor slab or crawl space clevatinn. llic drains shou � consist of 4-inch-dimaeler, rigid, perforated PVC pipe surcounded by Gee-draining matcrial, such as pca cravcl wrapped in a non-woven filtcr fabric °uch as Mirati 140NSL. Footing drains sliould discharge into tightlines Iending to an nppropriute collection and dischargc point. In addition, thc "higli' end and all 90-degree hcnds o( the subdrain pipe should be cnnn,;.•ted to a riser, �vhich e�tends to tl�e surfacc and acts as a cicnn-out Gawl spaces should be sloped to dra'n, and a positive connection should he made into the foundntion drainage system. Rouf drains shou'd be tighUined separateh of footine drains. NI drainage slioidd be routed to an appropri�te disc iargc poiiv. Sitc Prcpars�tion a�nd Gruding "I'hc new building nren should be stripped of vegetatiun, topsoil, loose soils, a„a ru ��r �„y). Any cxcavation into ihe slope should have its slopes laid back to flboul 111: IV (hurizontal: �ertical). The subgradc bclo�v an}• planned ,lab-on-grade and/or I'oundations should be compnctcd to a dense, non- yielding condition. Arcas obscrved ro pump o� weavc, shouid bc rep�ired by o��cr-c�cavnting and replacing��ith thuraughly compacted gram��ar till (structural till). RMI Associates, Ltd.