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Clay cover -- 1. 0 ft. thick. The excavation and placement <br /> unit cost will be the same as for the Foundation and <br /> Vegetative Layers. However, the clay will require <br /> additional compaction to 95% of maximum density and will <br /> require an additional unit expense as shown below. <br /> Table for additional compaction cost for clay cover <br /> Equipment Equip. open. Labor Production <br /> Cost/c.y. <br /> $ $ c.y. /hr $ <br /> ----------------------------------------------------------------- <br /> Sheepsfoot 14 . 68 23 .58 49. 06 0.78 <br /> Compactor <br /> Water Truck 5. 38 23 . 58 108. 33 0.27 <br /> Grader 14 . 38 23 . 58 866. 66** 0. 04 <br /> Supervision (engineering) 30. 00 650*** 0. 05 <br /> Compaction Unit Cost = $1. 14/C.Y. <br /> ** This cost is theoretical. <br /> *** This is based on engineering supervision for 26 weeks at 8 <br /> hours per week. <br /> Construction Quality Assurance(CQA) <br /> A CQA program will be developed as a separate document to <br /> control closure soil placement. It will be submitted with the <br /> final closure plan. <br /> This estimate of final cover cost for CQA is made under the <br /> assumption that permeability tests at a laboratory are about <br /> $200 each and that compaction testing with a nuclear gauge in <br /> the field is about $250 per day (includes labor) . <br /> a. Lab permeability tests will be done approximately every <br /> 4000 sq. yd. over the Largest Module (20 AC) + 1- 20 acre <br /> module. Estimated cost for a permeability test is about <br /> $200 each. <br /> ( (20 + 20) acres x 43 , 560 sq. ft. /acre = 1,742 , 400 sq. ft. ) <br /> (1, 742, 400 sq. ft. /9 = 193 , 600 sq. yd. ) <br /> 1 test every 4000 sq. yd. <br /> so, (193 , 600 sq. yd. /4000 = 48 tests) <br /> (48 x $200 ea. ) _ $9 , 600 <br /> 20 <br />