Frequently Asked Questions

What is the best day to send samples?

That depends on the sample. Total coliform bacteria samples should be send to that the lab receives them by noon on Thursday. If delivery by this deadline is not possible, please contact the lab for other arrangements. On the other hand, wastewater samples are set up in the latter part of the week. It’s best that samples are shipped for delivery on Wednesday, Thursday or Friday. Samples should not be shipped when they will remain in transit over the weekend.

How should I send my samples?

The type of sample should determine the method of shipment. For example, total coliform samples have a very critical hold time – 30 hours – and need to be shipped so they can be analyzed within that time frame. Regular USPS first-class and UPS ground have proved to be the efficient, cost-effective method of shipment.

Are there critical hold times?

Definitely. Most samples have a limited hold time when they can be analyzed before the results are affected. Total coliform samples must be analyzed within 3o hours of collection or they will be rejected. Ammonia samples, by contrast, can be held as long as 28 days if they are properly preserved. For more information on hold times, contact joekelly@met-lab.net or refer to the CFR table at www.cfr.gov.

What about the ice packs?

The ice packs are included for one reason – to keep the samples cold. Wide temperature fluctuations can affect the final results. Make sure that the pack is completely frozen. It’s often a good idea to freeze the pack as soon as it arrives so that it’s ready for shipment.

Do I need to fill out the chain of custody and labels?

Yes. The chain of custody is a document that identifies your samples and traces its handlers and locations between sampling and delivery to the lab. If needed, and if it’s completed correctly, it can serve as legal documentation of the integrity of you sample. When labels are provided, it is an important tool for our sample receiving department to ensure that samples are identified correctly. For samples that do no have labels (e.g. bacterias, pools, nitrates) make sure that the accompanying paperwork is firmly attached. The more complete the information you provide, the more complete the report.

Also, a complete chain of custody will eliminate the need for us to call and verify information. For example, if a sample exceeds the hold time or there is a discrepancy with the samples, our staff will call to verify the information. Complete documentation can avoid hassles and headaches for all parties.

What about bottles? Are there specific bottles for specific tests?