3430 SEVENICH DR Geotech Report 2018-01-02 MF Import

"" Mr. Bill Ruek�r W8396 25 September 1992 PaOe 7 .-. Strueturr Fil All fill materiN placed in buildinp,pavement, �nd non-landccaped arsas should be placed in accordance whh th� recomm�ndations herein for sauetunl filt. Prior to placement, ths surfaces to recsi��e � struetural fill should bs preparod ac previously deccribsd. All structural fi�i should be free of orpanie material, debrit, or oMer daleterious materisl. Individual particle size should be less than 6 inches in l� diameter. .— $tructural fill shouid be placed in lifta no Oreater than 8 inches in loose thickness and esch lift should • bs compacted to at least 90 percent of tha modified Proctor maximum dry density as determined by � ,_, the ASTM:D-1557 test prxedure. We recommend that�Oaotachniul enpineer,or hie reprcsenutivs, , ba prasent durinp pndinp so th�t�n�deQuate numbsr of density tesu m�y be condueted as structunl fill pl�cement occurs. In this way, the adequacy of the earthwork may be evalu�ted a� it procaed�. ' Ths tuiubility of soils for structural fill uas depends primarily on Me pradation and moisturo content � of ths soil when k i:piaeed. As the amount of finee (that soil fraction passinp the U.S.No. 200 Sisve) � � ineroaset, soil becomea inereasinply eensitive to small chanpes in moisture eontent �nd adaquate • • • compaction haeomes moro difficult, or impoasible, to aehieve. Generally, soilF eontaininp more than � , , �bout 5 psrcent fines by weipht Ibased on that soil fnction passin0 the U.S. No. 4 Sieve) cannot be comp�cted to a firm, non-yieldin0 condition when the moisture content ie more than a few percent from optimum. The optimum moisture content is that whieh yieida the preatest soil density under a piven compactive effort. Moat of the site soils disclosed by the explorationc contein a sipnificant fine•prained fraction and had somewhat elevated moisture eontenu selative to their possible u:s as structunl fill. Moisturs eonditioninp of site soils will likely be required if they are to be reused for structunl fili. SeleMive _. dryinp of over-optimum moisturo soi�s mey best be accomplished durinp eztended periods of dry weather when the controctor is able to aerate, disc, or windrow the mxteriai such that the moisture content can be lowered. Soila whieh are dry of optimum may be moistened throuph the application of water and thorou0h blendinp to facilitate a �niform moisture distribution in the soil prior to eompection. ' In the event that inclement weather or wet site conditions prevent the use of on-site soil or non•seiect "' material as structural fill, we recommend that a 'clean", free-draininp pravelly sand be used. Such ' G^ AGRA �., Earth&Environmental roup