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L. The minimum compaction for all fill materials placed is specified as 90 percent of the maximum dry density as determined by ASTM D1557 and the specified moisture content is 2% above or below optimum moisture content as determined by ASTM D1557. M. The maximum hydraulic conductivity of the fill materials is specified as 1.0x10-6 cm/sec as determined by ASTM D5084 or modified USBR E 9600. N. The Contractor shall selectively excavate soils from pre-approved off-site or on-site borrow sources as identified by the Landfill Engineer and Geotechnical CQA Consultant(or his representative) during the grading operations. The cover soils shall contain sufficient fine- grained constituents such that gravel size and larger fragments do not cluster during construction. All import soils shall be free of potentially hazardous environmental pollutants. O. In the designated processing areas, cover soils shall be processed to obtain a uniform soil condition. P. Protective cover soils shall be moisture conditioned (or dried) as necessary to 2% above or below optimum moisture content as determined by ASTM D1557. Q. Neither material import nor cover production shall exceed the capability of the processing operation to meet the project specifications. R. Representative samples of fill materials will be tested in the laboratory in order to determine the physical characteristics of the material. During processing and/or grading operations, no soils or soil types other than those previously analyzed may be used,unless the Geotechnical CQA Consultant documents the suitability of these soils with appropriate additional testing paid for by the Contractor. S. Where tests indicate the moisture content, density, saturated hydraulic conductivity, and/or other required soils characteristics of any fill or portion thereof is below the project requirements, the particular layer or portion shall be retested and if necessary reworked and/or removed and replaced until the required condition has been attained. No additional fill shall be placed over an area until the last fill has been tested horizontally and vertically and meets the requirements of this document to the satisfaction of the Geotechnical CQA Consultant. T. Where work is interrupted by heavy rains, fill operations shall not be resumed until observations and field tests by the Geotechnical CQA Consultant indicate the moisture content and density of the in-place fills and/or materials intended for placement are within the limits previously specified in(P). U. Drainage provisions shall be constructed in compliance with the recommendations of the Design Engineer and as shown on the Project Drawings. -11- GLA/2005-0082/FOR WARD/CQAPLAN.d oc/7/15/2005 Geologic Associates