1028 BROADWAY 2016-01-01 MF Import

i 1 „(rr�n�,ar�ion cqui��incu�. I�;ich li!i r,ln�uld I�c cru�.iitioncd ir �� : �,n��cr ini�{�,iurr cun�nn ;uid conqr,ic�c�! � �� tl�r spccificd �Icnsit} bctoic placini.c uiL,cqucnt lilis. tiUuctu�al lill shuulJ bc cump,ictcd tu ihc �i>Ilowing critcrio: L Slruclural lill placed belu�e Iluor slabs and foundalions should he compacted tu 95 percent of Ihc ` P1DD esliumtcd in accmdm�cc ��ilh AS'I M D 15i7. � '_. Shuctural lill iu new pavemrnt and hardscape arem, iucluding utiliry trench backfill, sliould bc comparied�o ai leas� 90�crcent of�he A4DU estim.ued in accordanee with ASTM D 1557, ezcept I Ihat the upper 2 feci of fill below fival su6grade shnuld be cotnpacted to a�Ieast 9i percenl uf Ihc �11�D, sce I�igurc-0. 3. Struclur:il fill pleced as crushed surG�cing base course below pavemcnts should be compacted �o I95 percent oft6c MDU cstimatcd in accordancc with A51'M D 1557. 4. Non-stn�ctural fill, such as till placed in landscape areas, should be compacted to nt Ieast 90 percent of the MDD estimaicd in accordance with AS7'M D 1557. In nrens intended for fwurc � devclopment, a higher degrec uf cotnpactiun should be considered to reduce the setUement patential oflhc fill soils. I 1Vca0�cr Considcratiaus. Uisturbancc of near surface soils should be expecled, cspecially if carlliwrnk is completed during periods of wet wca�her. lluring dry wcather tlie soils will (I)be less susceptible to disturbancc, (2)providc bcilcr suppoti tor construclion cquipntcnl, and (3)bc tnorc likcly to mect �hc myuired compaclion crileria. � 'llie wet wc�uhcr sc,ison gcncrally bcgins in Octobcr:md continucs through M�y in westcrn Washington; huwever, periods of �vel wealher may occur during nny monih of Ihe yeac Por emthwork aclivities � during��ct wcathcr,wc rceummcud thai thc following stcps be lakcn: • Thc grouud surlacc in aud around thc work arca should bc slopcd so that surfacc walcr is dirccicd a��ay fiom U�c work area. 'll�c ground surface slwuld be graded so tlml arcas of ponded watcr do I not devclop. Measmes should be taken by the cuntmctor�o prevent surface water Gom collecting in oxcavations and trenches. Mcasures should be implemented lo rcmove surfnce waler from the work arca. I • Garlhwork activitics shoalJ not takc place during periods of mudcrate ro heary precipitation. • Slupes wiih esposcd suils should be covered�vitii plastic sheeting. • 'Ilic conlraclor slimdd take necessary measurcs to prevent on-site soils and soils to be used as fill I fmm becoming wct or unstnble. 11iese measures may include the use of plaslic sheeting, 54f17�)5 �vith pumps,ond grading. 1he site soils should not bc Ie(i uncompactcd:md exposed to moisture. Senling the surficial soils by rollii,g with a smoolh•dnnn roller prior to periods of precipilation ( will hclp reduce the exlent that thesr soils become wct or unstable. • '17ie contraclor should cover all soil s;�ckpiles that will be used as strucWral fill wilh plastic shu:ling. I • Construction Uaffic should be restricted to specific areas of the site, p��ro�,�iy ��5 �n;,� a�� surluced with the cxisting asphall or �vorking pad materi;ds nut suscep[ible to wet weather dislurbancc. I . Construction activitic::shotild bc schcdidcd ;o th;it thc I�n�,h of tin�c tlial ,�iil, arc Icft c..p�"cd w moistwe is reduced�o the extent practic;d I I FilrNn.SN36�0�L00 Page 7 (�iEOENGINEER� .mn n.mn,s � 52