2507 HOWARD AVE 2016-01-01 MF Import

Gcutcchnic,�l 1?nginecring Kcport liousing liopc Dccembcr 5, 2004 RMI File No. 21704 P�gc 7 Crosion Control Nicas:�:cs Thc erosion hazard lor the omsite soils is sliah[ and is dependent on how the s-ite is graded and watcr is allowcd [o aceumulate. I3es[ Management Practices (BMPs) should be used to control aosion. Areas distr.rbed during construction should bc protected from erosion. Measures taken may include diverting surface water away from the stripped areas. Silt fences or straw bales shoulJ be erected tu preven[ muddy watcr from leaving the site. Disturbed areas should bc planted wrth vegelation as soon as practical. The vegetatian should be maintained until established. 1'he erosion po[en[ial of areas not s[ripped of vegetation should be minimal. Sitc Prcparation and Grading The first step oP site preparation after removal of[he existing struch�res sho�ld be to strip thc topsoil, fill, or loose soils to expasc medium dense o� better native soils in foundation area. This svipped material should be removed from the site. The topsoil can be stu�kpiled for later usc as landscapi,�g idl. Debris may have to be removed from purtions of the till if it is to be used as Itmdscaping fill. Tlic underlying na[ivc soils e�pected to be encountered after site stripping are considcred slightlt' to moderntely moisturo-sensitive. We expect t6at if thcy become we[during constructio!�, a Ihin surlicial layer may be disturbcd. Any disturbed soil sf ould be stripped from the subgrade before the pnvement section and foundations are installed. 'l liis should not be a problem if earthwork is conducted during thc dry wea[her. lf thc �round surface, after the stripping operatien, should appear to be loose, it should bc prooGolled and compacted to a noa-yielding condition and then pmbed. Amas observed tu pump or weave sheuld be reworked to structural till specifications or overexcavated and replaced with properly compacted structurai fill or rock spalls. If significan[ surface water tlow is encountered during construction, this flow should be diverted around arcas to be developed. Shallow ground I water, if encountered, slwuld be intercep[ed with cut off drains and routed outside of the planned I graJing arca. If wet or soft suberade condi[ions are encountercd, alternative site preparation methods may be necessary. The prepamd subgrade may be protected from disturbance by placing a blanket of RMI ASSOC/AT�S, LTD. � � � i