2001 W MUKILTEO BLVD 2016-01-01 MF Import

L ! Proposed McCabe Residence Remodel Everett, Weshington Project No. 6(3-9701022 Page 7 �,�: � : �,� �,�., , , � �„ Adcquate temporary end pem�enent control of surfece water nnwff and subsurfsce xepege will be required in ocder to allow site acce�s, g�rading, and conshuctioa W proceed. Excavatioa, fiUing, subgrade and �tade prepetation should be pafom�ed in a manner and sequetxe thet will provide drainege at all dmes and proper control of eroaion. Successful dreinege of local �aturated mnea due to accumulations of s�uface waLer ninoffcould be axomplisl►ed by localined ditc6ing and/or the iaatallation of cut-off trenches or "fcench" drains. The site should be graded to prevent water from ponding in wnstruction areas , and flowing inW or standing in excavadons. If t�eceasery, drainege sumps with pumps activaud by float switches slwuld be used W rcmove �tanding water from excavations or sumps when the conshuction site is unattended. Stripped working areas should be crowned, sloped, and �nooth- drum roped at the end of each day to facilitate drainage, and stripped areas tl�st are to be Isndscaped should be revegetated as soon ag pcactical. S1tC.Sl[1RR1[lQ Site prcparadon will require removal of my existing shuctu[es or fouedations a� well es all surface vegetation and its auociated root systems, otganic soils or otlxr deletetious materials iu plmned building and pavement ereas. Sod and topsoil vwere encountered at the exploration locatioas and were about 6 inches in thiclmess. Actual removal depths should be deteimined by a Gtles representative at the time of grading based on the subecade material's organic conknt and stability. Upon compledon of demolition and stripping, loose, wet sand fill should be expoxd. Where foundation excavations do not penetrate through this loose 611, foundadon subecades should be remediated as described in the shallow foundafioas sectioa of this ceport. � •,�::. � �, _ , � Soils exposed by subgrade preparation operadons ere anticipated to contain a moderate "fines" content and would be considered moisture- and disturbance-sensitive. These soils would become unstable if disturbed (tutted) by constr�ction equipment while at elevated moistute contents requiring. additional soil removal at an increased cost. Moisture content testing was completed on rcpresentadve soil samples and, in most cases, the soil moisture content was well above opdmum. Therefore, site preparation and inidal construction acdvities should be planned to minimiae disturbence to the existing ground surfaca If site stripping and grading activi6es ere perfocmed during extended dry weather periods, extensive subgrade stabilization is not expected to be necessary. However it should be noted that intennittent wet weather periods during the summer months could delay earthwork if soil moisture conditions become elevated above the optimum moisture content. The use of a working surface of sand and gravel, crushed rcek, or quazry spalls may be tequired to protect the silty soils perticulery in areas supporting concenUated equipment traftic.