N.M. Admin. Code § 20.9.4.14 - TESTING AND QUALITY CONTROL FOR LINERS AND FINAL COVERS

A. All testing of geosynthetic and soil materials shall be performed in accordance with applicable American society of testing materials (ASTM) standards.

B. The construction and installation of all liners and final covers shall be done in accordance with a quality control plan approved in the permit. All testing and evaluation of liners shall be certified by a professional engineer licensed in New Mexico and experienced in liner installation, and shall be completed prior to the placement of the protective cover. All field testing of liners and final covers shall be the responsibility of an individual experienced in liner or cover installation and soils or geotextile engineering, as appropriate. The quality control plan shall:

(1) define the procedures required for obtaining samples and testing and reporting the test results for the installation of the liner and final cover;

(2) describe and illustrate to operating personnel all necessary procedures for maintaining the integrity of the liner, leachate collection systems, and final cover;

(3) for the soil component, prescribe the following minimum frequency of testing for the soil component of all liners and final covers, unless otherwise specifically approved by the department:

(a) soil from the borrow source shall be tested as follows:

(i) grain size shall be tested once every 1,000 cubic yards;

(ii) Atterberg limits shall be tested once every 5,000 cubic yards;

(iii) Proctor compaction moisture-density curve conformance shall be tested once every 5,000 cubic yards; and

(iv) laboratory permeability shall be tested once every 5,000 cubic yards; and

(b) during construction of the liner or cover, the soil shall be tested as follows:

(i) density and moisture content tested by nuclear desiometer shall be tested four times per acre per lift;

(ii) laboratory or in-situ permeability shall be tested once per 2 acres and laboratory samples shall be undisturbed or recompacted to the site-specific field conditions; and

(iii) total thickness (by survey) shall be tested once per acre (on grid);

(4) for the prot ective cover component of liners, when used to facilitate leachate drainage, prescribe the following minimum frequency of testing of the granular drainage layer, unless specifically approved by the department:

(a) grain size of the soil shall be tested once every 1,500 cubic yards; and

(b) total thickness of the drainage layer shall be tested five times per acre; and

(5) for the geomembrane component of all liners and final covers as defined in Subsection A of 20.9.4.13 NMAC and Subsection A of 20.9.6.9 NMAC, all testing, both shop and field, shall be as recommended by the manufacturer unless otherwise specifically approved by the department; the minimum frequency of taking seam samples for destructive testing shall be one per 500 feet of seam length, with a portion of each test sample tested in the field and another in the laboratory; seam samples shall be tested for peel adhesion and bonded seam strength; non-destructive testing shall be performed for all seams, seam repairs, and liner repairs.

Notes

N.M. Admin. Code § 20.9.4.14

20.9.4.14 NMAC - Rp, 20 NMAC 9.1.III.307, 08/02/07