The accuracy and integrity of your results can be greatly influenced by sampling technique. Following these simple instructions will help ensure high quality results.
Bottles
Sample bottles may be obtained from us at no charge. Alternatively, procure a sterile specimen cup (like at the doctors office) from a local drug store for the bacteria analysis. It must be pre-sterilized as boiling bottles at home does not sterilize and increases the likelihood of a false positive. Bottles for chemical parameters may be any clean pint-sized container made of glass or plastic. If you are to test for volatile organics or radon you must get special vials from us.
Prior to sampling
When the sample is collected for bacteria or inorganic chemical parameters, sufficient air space (1/2 inch) should be left in the top of the bottle to facilitate shaking prior to analysis. Keep sample bottles closed until they are to be filled and be careful not to contaminate inside surfaces of containers. Fill containers without rinsing and cap immediately.
Sampling procedure
Special sampling instructions for radon or volatile organics
If sampling for radon or volatile organics, special vials are required and available from us free of charge. They must be filled so that there are no air bubbles present after capping the vials. This is really easier than it sounds and is best achieved by topping off the vial under a slow, steady stream of water to fill it as much as possible. After filling and capping the vial, invert it and observe for any rising air bubbles. If there are bubbles, just add some more water.
Labelling
Label bottles with your name, address, date and time sampled.
Common improper sampling techniques
Do not take bacteria samples from a hose as they will almost certainly fail. Use a faucet that has been cleaned properly.