329 IAC 10-17-9 Drainage layer component of the liner; construction and quality assurance/quality control requirements

Sec. 9. (a) If the drainage layer material is to consist of soil or soil like materials, the project engineer shall ensure the following: (1) A grain size analysis and hydraulic conductivity test is completed during the installation for soil drainage layer materials at frequencies described in Table 1 of this subsection. (2) The quality control and quality assurance testing of the soil drainage material meets the requirements of the approved construction plans. (3) The soil drainage layer is constructed and graded in accordance with the approved construction plans. (4) Carbonate content testing must be performed prior to and during the installation of a drainage layer, if the drainage material is limestone (CaCO3) or dolomite/dolostone (Ca-Mg (CO3)2) or from a source likely to contain a high percentage of carbonate materials. The test must be performed: (A) at a pH of less than seven (7); and (B) at every three thousand (3,000) cubic yards. The test results must show a carbonate content no greater than fifteen percent (15%). Higher carbonate content may be allowed in drainage layer materials if a demonstration is submitted showing that the hydraulic conductivity of the drainage layer will not be decreased below the minimum of 10-1 centimeters per second because of carbonate mineral precipitation. TABLE 1 Soil Drainage Layer Materials: Minimum Testing Frequencies Item Tested Minimum Frequency Grain size (to the No. 200 sieve) 1 test per 1,500 cubic yards (2,400 per ton) Hydraulic conductivity test 1 test per 3,000 cubic yards (4,800 per ton) or minimum of 3 tests (b) If the drainage layer material is to consist of a geosynthetic material, the project engineer shall ensure the following: (1) The geosynthetic drainage layer material is chemically compatible with the waste to be deposited and with the leachate that will be generated. (2) Effective liquid removal will be maintained by the drainage layer throughout the active life, closure and post-closure period of the MSWLF. (3) The geosynthetic drainage layer is constructed and installed in accordance with the approved construction plans. (4) The quality control and quality assurance testing of the geosynthetic drainage material meets the requirements of the approved construction plans. (5) Results of the following tests, or equivalent tests where applicable to a specific product, and the following criteria are adequately addressed: (A) If the geosynthetic material is a geotextile: (i) grab elongation test; (ii) grab tensile strength test; (iii) puncture resistance test; (iv) trapezoidal tear test; (v) ultraviolet (five hundred (500) hours) resistance test; (vi) abrasion or tumble test; (vii) permitivity test; (viii) apparent opening size (AOS) test; (ix) long term flow (clogging) test; (x) gradient ratio (clogging) test; (xi) the nature of the fibers (i.e., continuous filament or stable fibers); (xii) the chemical compatibility of the geotextile; (xiii) the polymer composition; (xiv) the structure of the geotextile (i.e., woven or nonwoven); (xv) thermal degradation and oxidation in extreme acidic conditions; (xvi) pH resistance of the geotextile; (xvii) creep; (xviii) resistance to extreme temperature; (xix) resistance to bacteria; (xx) resistance to burial deterioration; and (xxi) other tests or information that may become necessary, as determined by the commissioner, to demonstrate the integrity of the drainage layer component. (B) If the geosynthetic material is a geonet: (i) tensile strength test; (ii) hydraulic transmissivity test; (iii) specific gravity test; (iv) melt flow index test; (v) carbon black content test; (vi) abrasion or tumble test; (vii) creep; (viii) thickness; (ix) chemical compatibility; (x) resistance to extreme temperature; (xi) resistance to bacteria; (xii) resistance to burial deterioration; and (xiii) other tests or information that may become necessary, as determined by the commissioner, to demonstrate the integrity of the geosynthetic material.