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`,Eke biller,City of Stockton <br /> August 25, 1998 <br /> Page 2 <br /> "Completely excavate and grade the new channel before fall and winter rains (before October <br /> 31). Earthen dams must remain or at both points of connection to the existing channel <br /> (Figure 3-2). Construct erosion-control measures, completely in place,before October 31." <br /> Grading activities along the new creek alignment would not be completed by October 31. Soils <br /> generated during the creek alignment grading operations were intended to provide cover soils to <br /> support ongoing landfill operations. Because these soils will not be available,CDM proposes an <br /> alternative cover borrow source. <br /> Proposed Borrow Source <br /> It is recommended that excavation outside of the proposed creek flood plain be initiated. I: <br /> understood that although this property has been identified as a source of cover sod for the �.dflil <br /> cility Permit Boundary and uhe pornon of the .ice within <br /> operations,it is outside of the Solid Waste Fa <br /> the City of Stockton. The proposed location for the excavation is depicted in the attached lure. <br /> The configuration of the proposed excavation was based on obtaining sufficient cover sod :or a year of <br /> disposal operations. At a waste disposal rate of 600 tons per day, assu==g 250 w•orung dais per year, <br /> and a 3:1 waste-to-soil ratio,it is estimated that approximately 50,000 cubic yards of soil are required <br /> Excavating the 300 by 900 foot rectangular parcel to a depth of approsimatelc 5 feet results in 50,000 <br /> cubic yards of material. The specific limits of the grading are not critical as long as the operations are <br /> outside of the proposed new creek alignment flood plain. The location of the excavation ad,acent to <br /> the central perimeter ditch crossing was identified to minimize scraper haul times. <br /> DRAFT <br /> T:%w W NNS000WSTVMII(ZAUSTINRO\ORFTMEMO.WPO <br /> I <br />