STANDARD OPERATING PROCEDURE FOR THE MEASUREMENT OF

Water for use in turbidity analysis is collected using one of the vials in the turbidometer kit (for immediate analysis) or a clean one pint plastic bottle (for later analysis). Prime the vial or bottle with native water from the churn splitter and, while churning, fill the vial above the white line or fill the pint bottle to the top ensuring that the bottle is not aerated. If collecting for later analysis, place the bottle on ice until analysis is made (water must be brought to ambient temperature for an accurate reading to be determined). Analysis must be made in 24 hours, but immediate analysis is preferable. Turbidity is measured using the Hach © 2100P portable Turbidometer. Remember that dirty glassware and the presence of air bubbles may give false results. Be sure to record all calibration information in the log notebook found in each Turbidometer case