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Table 2 – Summary of Survey Information

1. Do your regulations contain general and/or specific requirements for CQA conformance testing for geomembranes, geotextiles, geocomposites, geogrids and plastic pipe?

  • a.

    All yes

  • b.

    All yes except pipe

  • c.

    All no

  • d.

    GM only

  • e.

    GM and pipe

  • 2.

    If no, does your agency rely upon:

    • a.

      US EPA guidelines (min. tech. guidance)

    • b.

      Manufacturer’s data

    • c.

      Design consultant’s data

    • d.

      Literature or historical data

    • e.

      Other - CQA conformance plans

  • 3.

    Does your regulation specifically state the interval for destructive seam

sampling of geomembranes?

  • a.

    Yes

  • b.

    No

  • 4.

    If yes, at what interval?

  • 5.

    If no, how do you approach the situation?

    • a.

      Design consultants recommendation

    • b.

      CQA organization recommendation

    • c.

      Manufacturer/installer recommendation

    • d.

      Other- Independent contractor Use Standard of 500 ft or GM14

  • 6.

    Do your regulations or guides allow for a nondestructive (NDT)

alternative to destructive tests? Allows infrared sensing Allows ultrasonic testing Allows electrical leak integrity survey Allows spark testing Other – Air lance testing Vacuum chamber method Requires NDT testing, but method not specified

7. Does the use of any of these NDT methods allow for reduction or elimination of the destructive sampling protocol?

  • a.

    Yes

  • b.

    No

  • c.

    Maybe/Possibly

Total No. of States

9 2 22 8 2

43 21 17 13 7

13 25

13 - all at 500’

13 16 9 1 2

7 7 12 10 5 3 5

3 15 6

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