Liner Integrity Test

This method controls the integrity and non-damaged statue of the fields with completed geomembrane application according to ASTM D7953 (American Society for Testing and Materials). It detects simply and fast if there is any failure in the system by providing the quality control of enlarged leak-tightness systems in company with changing regulations.

Arc Testing Method: This test detects all 1mm holes on the geomembrane surface according to ASTM D7953, however studies show that this method can determine much smaller damages than 1mm.  It is applied that a high-voltage power source sends current to geomembrane surface by means of probe fixed to a mechanism which technician can easily use. The current is consistently transferred to surface by running the probe on the geomembrane surface. It is concluded that the current makes arc with lower conducting layer by passing over the geomembrane in case of any irregularity (hole, torn, thinning etc.) on the geomembrane. At this stage, device alerts the technician by giving audio-visual signals. GEOSURVEY informs all damages detected on the scanned geomembrane surfaces to the repair crew by the means of written form and schedule. The repaired points are tested once again.

Advantages of Liner Integrity Test:

Responsibility: GEOSURVEY takes responsibility for control of field integrity along with routine test methods at the stage of geomembrane application and issues a certificate according to this. The potential damage detection, which is impossible to handle, on the black geomembrane is carried out without any problem thanks to inspection.

Low Cost: Comparing the cost of Arc (Integrity) test and the budget which is required to fund for fixing the problems because of leaks from potential damages on the geomembrane, it is obvious that the test cost is much less than repairing them.

It is practical and no installation required: This method is not required a permanent field installation. It is fast and reliable method in order to be sure if there is no damage after geomembrane application and to control the quality.

Fastness: A technician can approximately control 6.000 m2 application per day. Test duration is easily increased or decreased according to the project requirement and field condition.

Supervision

We operate the progressing geosynthetic application (GCL, geomembrane, geotextile, drainage geocomposite, etc.) on your field with our experienced supervisors on behalf of you.

Inspection

We carry out the tests of your geosynthetic applications on the field with our experienced team and calibration equipment.

✓ Inspection: We carry out the tests of your geosynthetic applications on the field with our experienced team and calibration equipment.

✓ Vacuum Test: According to ASTM D5641 standard, this method is applied on the repairing and reinforcement (patch) fields which is used the extrusion weld method.

✓ Air Pressure Test: According to ASTM D5820 standard, this method is used to test the sustainability for parallel twin welded fusion welding which is divided by an air channel.

✓ Welding Resistance (Tensiometer) Test: According to ASTM D4437 standard, this method is applied on the completed geomembrane panel welding or on the samples of testing welding before the main welding. It gives opportunity to show the quality result of welding resistance based on a numerical value as N/mm.

Reporting

✓ Calibration procedures of all equipment in use
✓ Control of manufacturer test reports and laboratory test reporting of geosynthetic materials supplied within the scope of your project
✓ Daily logs of ongoing technical works within the scope of the project
✓ Logs of the quality control tests and final result report
✓ Leak-tightness control result report after Liner Integrity Test

Waterproofing For Buildings

Geosurvey also applies integrity test method for waterproofing buildings in accordance with the ASTM D7877 standard. Building foundation-underground wall applications and watertightness tests of high building terraces can be done quickly and safely. This method is used in areas where water testing cannot be performed. The watertightness test of applications made with synthetic and bituminous membranes, liquid membranes, spray application, HFA waterproofing systems can be performed with the integrity test method. Conductive materials such as cement-EPDM are not tested with this method. We also provide Expertise and Supervisorship services for all waterproofing tests made in the product and building types defined above. Please get information from our expert teams about which system-product groups can be tested.

Tinker Rasor

Geosurvey is the regional distributor of Tinker Rasor. Please click for the products we are selling

Dipole Test

WHAT IS DIPOLE TESTING?
Maintaining the integrity of geosynthetic lining systems is critical for landfills or heap leach areas. Dipole Test, which is applied with equipment in accordance with ASTM D7007 standard, is a geoelectrical technique developed to determine the leakage locations of geomembranes coated with natural materials (clay, sand, gravel, etc.) with high precision. Especially in Mining Heap Leach projects, it is applied after the gravel layer placed on the top layer of HDPE geomembranes used as impermeability layer.

HOW DOES IT WORK?
Geosurvey experts create a test area work plan during the preliminary inspection of the site to be tested. In line with the plan, electrical sources are temporarily positioned in the area to be tested. Test technicians start the damage detection work in the test area with current monitoring sensors configured in accordance with ASTM D7007 standard. The detected damage points are reported to the project owner.

WHAT ARE THE ADVANTAGES?
It is possible to detect even 1cm² leak points in different damage simulations without any additional damage to the geomembrane layer.

It is the most practical test method developed for the control of geomembranes covered with various natural materials such as gravel, soil and sand.

Leak locations are quickly detected without the need to add a permanent component to the area to be tested.

Research shows that the probability of damage to geosynthetic materials is very high when natural materials (gravel, etc.) are laid on geosynthetic materials. With the “Dipole Test” method, the impermeability function targeted in your project can be achieved safely after gravel paving.