Passive 'no-purge' Sampling

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1. Are you familiar with taking groundwater samples using passive or ‘no-purge’ samplers?

Yes

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2. Have you ever used a passive sampling technique?

Yes

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3. What is your usual/preferred method of groundwater sampling?

High Flow Sampling

Low Flow Sampling

Passive/No Flow Sampling

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4. What was the reason for choosing your current sampling technique?

Determined by the regulator

There is a history of using this method for this project

It is what we are familiar with

We have the equipment

Other (please specify)

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5. What is the average duration of your typical groundwater monitoring project?

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6. In your projects, are your sampling events repetitive or one-off?

Repetitive

One-Off

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7. What percentage of your sampling events are repetitive?

Percentage

100%

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i We adjusted the number you entered based on the slider’s scale.

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8. If your sampling events are repetitive, what is the typical frequency?

1 month

Frequency

12 months

Clear

i We adjusted the number you entered based on the slider’s scale.

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9. Are you experiencing any unexplained variability between your sampling results?

Yes (please specify)

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10. Do you believe your results are obtained efficiently and show consistency?

Yes

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11. If you are using a passive sampling method, which type are you using?

Grab (thief)

Diffusion (equilibrium)

Integrating (kinetic)

Not using

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12. Have you encountered any restrictions or objections when using this method?

Insufficient sample size

High levels of turbidity

Initial hardware was too expensive

An inability of comparing results with more conventional sampling methods

Don't use

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13. What is the most common internal diameter of the wells that you are monitoring?

Less than 2"

4" and larger

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14. What sample volume does your regular laboratory require you to supply?

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15. What is the deepest well you are required to sample regularly?

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16. Do you have problems obtaining samples from wells which have very low recharge?

Yes

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17. Passive or ‘no-purge’ sampling in general shows substantial cost savings. On average what proportion of your overall budget comprises of the sampling costs?

Percentage of sampling costs to total project costs

100%

Clear

i We adjusted the number you entered based on the slider’s scale.

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18. What would make you consider changing your current sampling methods?

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19. If you do not have experience with the passive or ‘no-purge’ sampling method, would you be interested in attending a seminar?

Yes