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Lined Pit Guide 12 September 2000 Construction Quality Assurance Plan This plan addresses the construction quality assurance (CQA) procedures for the installation of the earthworks components for a clay liner reservoir project. The CQA program is developed to assure that the construction of the soil components are in compliance with the project specifications and [o demonstrate achievement of the construction regulatory requirements. The CQA monitor is the firm or individual responsible for performing the quality assurance tasks. The specific responsibilities of the CQA monitor include: • review the drawings, specifications, and related guidance documents; • observe excavation activities and backfilling operations; • obtain preconstruction and construction samples and perform material evaluation testing as required; • monitor and document material placement, including soil type, clod and particle size, loose lift thickness, moisture conditioning process, compaction equipment and methods, number of passes, uniforntity of compaction coverage, compacted lift thickness, bonding of lifts and in-place moisture content and dry density is as required by the specifications; • assure that testing equipment used and tests performed aze conducted according to specifications and industry standazds; • document and report test results; • report any deficiencies in the construction and their resolution; • ptepaze a construction certification report describing the construction, any deviations from specifications or drawings and details (with reasons and resolutions), field and laboratory test data and results, and will include professional certification that construction was completed in accordance with the plans and specifications. The following table is an example of a CQA testing protocol for a clay liner project. SOIL LINER TESTING FREQUENCY VOLUME PER TEST Test and ASTM Desi anon .Soil Liner Fill (c ) Com action (ASTM D 698) 5,000 Particle Size (ASTM D 422) 5,000 Atterber Limit (ASTM D 4318) 5,000 Moisture Content (ASTM D 2216) 500 Permeabilit (ASTM D 5084/2434) 15,000 Nucleaz Densit ' 500 1. Specified frequency or one per material type, whichever is greater. 2. Specified frequency or minimum of four per day, whichever is greater. I