Hydrosphere renews its USDA permit to receive soil samples

Hydrosphere recently renewed its USDA PPQ 525A Application for Permit to Receive Soil. This allows Hydrosphere to receive soil samples from around the world in order to help clients with their toxicity testing needs. Currently, Hydrosphere is involved with a large scale long term sediment toxicity project. The twist is that the samples being tested are actually soils. We are using a hydration/aging process that we have developed in-house over the years. Using these samples, Hydrosphere will be conducting 10-day survival and growth studies with the C. tenans and H. azteca test species.