1718 ENGLAND AVE 2016-01-01 MF Import

IGcutcchnical Engincering Evaluation Gngland r�venuc Lot f Junc 2, 2005 � NGA Filc No.41 ISOS I'agc 10 � Fill Placemenh Following subgrade prcparation, placement of structural fill may proceed. All filling should be accomplished in uniform lifts up to eight inches thick. Each lift should be spread evenly and be � thoroughly comp:�cted prior to placement of subsequent lifts. All structural (ill undcrlying buildina arcas and pavement subgrade should lx: compacted to a minimum of 95 percent of its maximum dry Jensity. � Ma�imum dry densiry, in this n;port, refcrs to that density as dctennincd by the ASTM D-1557 Compaction Test procedure. The moisturo content of the soils ro be compacted sliould be within about I two percent of optimwn so that a readily compactabic condition exists. It may be necessary to overv excavate and removc wet soils in cases whcre dryina to a compactablc condition is not fcasible. All 1 compaction should be accomplished by cr�uipment of a type and size sufficicnt to attain the desired degree oe compaccion. ' Slab-on-Gradc Slabs-on-gradc should bc supportcd on subgadc soils preparcd as dcscribed in thc Sitc Prcparation and IGrading subscction of this report. We reconmiend that all floor slabs be underlain by at least six inchcs of free-draining sand or gravel for use as a capillary break. We recommend that the capillary break be Ihydraulically connected to lhe footing drain system ro allow Gee drain��e from tmder the slab. A suitable vapor barrier, such as heavy plastic shecting (G-mil minimum), should be placed over the capillary break { matcrial. I IPavemenls Pavcment subgrade prep:vation, and swctural fill placement wheir: rcquimd, should be complctcd as i rccommcndcd in thc Sile Prcparalion and Grading and Structural Fill subsections of this repon. Thc pavcmcnt sub�radc should bc proof-rolled �vith a hcavy, nibber-tired piccc of equipment, to identify soft or yielding areas that requirc rcpair. �yc should bc rctained to observe the proof-rolling and recommend repairs prior to placement of the asph;�lt or hard surfaces. IKetaining��:ills We anticipate that retaining/shoring w:dls �oill be uscd to support cuts and fills for this project. ho�vecer, a � topographic survey and grading plans had not been completed at the time this n;port was pmpared. Preliminary plans indicate that cuts up to 2S feet below the current grade are anticipated for the daylight I basement of the proposcd residencc. Retaining walls may be necded on the south, east, and west sides o( I the planned daylight basemont. Also, a debris wall �•xtending above the surface might be needed on the 1 NELSON GEOTECHN/CAL ASSOCIATES, INC. I