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kn KLEINFELDER Assurance of the quality of construction includes advising the construction personnel of the necessity for exact fulfillment of design requirements and the consequences of inadequate workmanship. Construction personnel will also be made aware that requirements for compactive effort are more rigid when permeability and density criteria must be met than they are when density criteria alone must be met. Construction personnel should understand that compactive effort sufficient to produce passing dry density tests may not be sufficient to produce practical minimum attainable permeability for that density. s Construction personnel should also understand that their prime purpose in constructing the compacted low permeability soil cover is to achieve minimal permeability and that to this end the acceptable clod size for the attainment of minimal permeability is significantly smaller than is acceptable to obtain adequate dry density on other types of projects. Construction operations should comply with Section 24 of Caltrans Standard Specifications regarding particle size. Throughout construction, the progress of the work will be monitored and measured to check that the work is proceeding as planned. Any changes to planned procedures must be approved and documented by the Engineer. In order to evaluate the construction equipment and methods to be used to construct the impermeable soil cover to the requirements of Chapter 15, Title 23, CCR, a trial low permeability cover section (test pad) has been constructed. The cover test section was used to test the Contractor's proposed equipment for the number of passes required to obtain the specified compaction at a moisture content of 3 percent wet of optimum or greater. GSM.-MD 3EI94 Page 15 of 24 Copyright 1994 Kleinfelder, Inc.