Upper Control Limit (UCL) definition
Upper Control Limit (UCL) means the limits based on control limits centered on the mean and are drawn at mean + 3 Sigma Deviations. The UCL for each Product Family is specified in EXHIBIT L (BASELINE FAILURE RATES) hereto. For New Products the UCL will be agreed to between the Parties after three (3) months of commercial production.
Upper Control Limit (UCL) means a value greater than the maximum value of a chemical or physical parameter that can be attributed to natural fluctuations and sampling and agree upon by the Administrator and the operator prior to initiation of mining. UCLs are used to determine when there is movement of recovery fluid out of authorized areas or unapproved changes to a chemical or physical parameter. For certain parameters, such as pH, a UCL may be defined as an acceptable range of values.