Laserfiche WebLink
CLEARWAfER <br /> G R O 'U P, I, N C. ; <br /> If shoring and excavation prove to be cost prohibitive,_Clearwater will' inform . <br /> the• San Joaquin County PHS/EHD. Insitu - eat. e ' will. be addressed in a ' <br /> ,subsequent,siubmittal. <br /> Ve etation <br /> Before work begins in the excavation, vegetation and debris will be removed <br /> and taken to a municipal landfill for disposal: <br /> Sh rin Installation and Additional S iI'R m val <br /> As discussed in the Preliminary Site Assessment Report, removing additional <br />' soil to ex ose the surface. of <br /> p the underlying sand _unit . may" ' facilitate <br /> z, remediation of the surface. <br /> zone. However,. because of the nearby building, <br />' sidewalk, and buried utilities along Lafayette Street, installation, of shoring. <br /> will'be necessary before removing additional soil from' the bottom of. the <br /> excavation. This workplan does not include .removal of additional soil from <br />' the north side of'the excavation (in"the area adjacent to the sidewalk) or,from <br /> the south side of the excavation adjacent to the building:' <br /> The cost of shoring.,and removing. additional soil•.will be com ared to the <br /> -estimated* cost of- leaving the soil in place and remediating ip'in , situ. If <br /> shoring the excavation is.deemed cost effective, shoring (sheet piles) will be <br /> placed along the walls of the excavation near the building and.near,the street. <br /> Soil will be excavated to a depth of 20-25 feet. -Four,soil samples will be taken <br /> from the'. loor•of the excavation and analyzed-for'TPHg, BTEX, and TPHd. <br /> Excavation Backfillin . and Com actin - <br /> Prior to beginning. backfill operations, the, bottom , of the existing large <br />' excavation will _be leveled using a.backhoe: .Clean imported fill (other than <br /> sand or pea gravel) will be placed in the excavation and ,compacted in lifts. <br /> Geotechnical testiri <br />