In order to achieve the ambient level detection limits required by the Clean Water Act, the EPA developed a number of analytical methods specifically for metals at “ultra-trace” levels. These methods include EPA 1630 for methylmercury, EPA 1631 for low-level mercury, EPA 1632 for arsenic species,EPA 1638 for trace metals, and EPA 1640 for trace metals specifically in seawater.

However, they found that one of the greatest difficulties in obtaining accurate data at such low concentrations was due to contamination occurring from the improper collection, handling, and transportation of samples.

Therefore, “clean” sample handling techniques were developed, as described in EPA 1669: Sampling Ambient Water for Trace Metals at EPA Water Quality Criteria Levels.

On October 28, 2013, Brooks Rand Labs is partnering with BSK Associates to hold a full-day training course in Golden River, CA (outside of Sacramento) on the theoretical and practical application of EPA 1669. Register by October 1st and pay only $250! To learn more, view the EPA 1669 Training Course Brochure and Registration Form.