For lab sample testing please complete this form after shipping the sample and include a tracking number. Please Note: The minimum volume of sludge required for a test is one Liter. We are not responsible for delays due to not being provided the minimum quantity of sludge. If your sludge is less than 1% solids please include two Liters. The tracking number is optional but we are not responsible for delays due to packages lost by the shipping company. Biological samples should be shipped with ice to preserve sample integrity.