R 299.9621 Quality control for landfills, surface impoundments, and waste piles.

Rule 621. (1) Owners or operators of landfills, surface impoundments, and waste piles shall conduct a quality control program during construction that ensures all the following: (a) That the natural clay base meets or exceeds the thickness and permeability requirements of R 299.9603(5), by doing either of the following: (i) Obtaining soil borings and determining the natural moisture content as determined by ASTM standard D2216-10; grain size distribution, sieve and hydrometer, as determined by ASTM standards D6913-04 and D7928-16; classification by the unified soil classification system as determined by ASTM standard D2487-11; Atterburg limits of the soil as determined by ASTM standard D4318-10 at varying depths every 100 feet; and the permeability of an undisturbed sample every 200 feet as determined by ASTM standard D5084-10. (ii) Utilizing resistivity surveys to replace or supplement borings specified in paragraph (i) of this subdivision. The resistivity surveys must employ an electrode spacing to give an effective depth of penetration. A sufficient number of stations must be used to ensure that complete coverage to the edge of the waste management area is provided and correlation with borings or wells is obtained. (b) That the natural clay base provides an adequate sub-base for overlying liners and leachate collection and removal systems, by evaluating the subgrade conditions for stability and correcting wet or unstable areas. (c) That compacted clay liners meet or exceed the requirements of R 299.9620(2), by doing all the following: (i) Constructing the liner so that the bottom liner and the side wall liner, dike, will be continuous and completely keyed together at all construction joints. (ii) During winter construction, removing all ice and snow before placing the liner and not using frozen soil in any part of liner. (iii) Determining the field density-moisture of the liner material by utilizing the provisions of ASTM standard D6938-15 for each 1,000 cubic yards placed, with a minimum of 1 test per day of construction or layer of clay placed. (iv) Determining the particle size distribution, sieve and hydrometer, according to ASTM standards D6913-04 and D7928-16, Atterburg limits according to ASTM standard D4318-10, and natural moisture content according to ASTM standard D2216-10 of random samples of liner material from each 5,000 cubic yards of material placed. (v) Redetermining the density of liner materials by the modified proctor test, ASTM standard D1557-12, when the texture of the soil changes and every 5,000 cubic yards placed. (vi) Determining the permeability with water of a soil sample every 10,000 cubic yards placed by using ASTM standard D5084-10, which is adopted by reference in R 299.11001, or other method approved by the director on a sample that is not less than 2.8 inches in diameter. (vii) Verifying liner thickness and subgrade slope by a final elevation check to ensure that all the following requirements are met: (A) The final elevation must be within plus or minus 0.2 feet of the approved plans. (B) The slope reduction of the subgrade must not be greater than 10% of the approved slopes. (C) The final clay liner thickness must not be less than the approved thickness at any point. (d) The synthetic liners are properly installed, by doing all the following: (i) Properly preparing the foundation for the liner by doing all the following: (A) Compacting to the requirements of R 299.9620. (B) Grading the foundation to a smooth and true line. (C) Grading consistent with approved plans. (D) Grading the foundation to be free from stones or deleterious material. (E) Removing any vegetation from the foundation before installation of the liner. (ii) Ensuring that field seaming is done under the direction of a registered professional engineer and when weather conditions are favorable for installation. (iii) Ensuring that field seams, joints, and mechanical seals are properly made by wiping contact surfaces clean of dirt, dust, moisture, or other foreign material, ensuring that seaming is done in accordance with manufacturer specifications and testing all field seams by nondestructive tests approved by the director. (iv) Recording the ambient temperature and liner temperature hourly during liner installation or field seaming. (e) That leachate collection and leak detection, collection, and removal systems are installed so that the requirements of this rule are met, by doing both of the following: (i) Making elevation checks not less than every 200 feet to verify the appropriate thickness of granular material. (ii) Sampling randomly not less than every 5,000 cubic yards placed to verify the required aggregate classification. (2) The quality control program required by subrule (1) of this rule must be documented by written daily records of all work and tests performed during construction. All daily records must be maintained in the operating record for the facility and available for inspection by the director or the director’s authorized representative. (3) ASTM standards D2216-10, D2487-11, D1557-12, D2434-68, D4318-10, D5084-10, D6913-04, and D7928-16 are adopted by reference in R 299.11001.