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Two schools with similar percentages of pupils achieving Level 2 or Level 1 thresholds may have different average point scores . Those four panelists ( a total of five NRC I panelists served on NRC II ) concluded that " that the current [ Maximum Contaminant Level ] MCL for arsenic in drinking water of 50 ug / L does not achieve EPA 's goal for public health protection and therefore requires downward revision as promptly as possible . As outlined by Kirkpatrick ( Kirkpatrick , 1994 ) , the evaluation of training programs can be conducted on four distinct levels , as follows : f. ) Level 1 – Reaction : An assessment by learners of the value and effectiveness of the program . Spellman 's Standard Handbook for Wastewater Operators , Volume 2 : Intermediate Level provides information and unit process trouble-shooting guidance required on a daily basis , not only by the plant manager , plant superintendent , chief operator , lab technician , maintenance operator , but more importantly by and for the plant operator , and those in preparation for taking the entry-level Class IV / Class III or Grade I / II operator examinations . " Level 3 's data centers are well connected facilities that enable diverse routing and easy connections with other communications companies , " said Jon Fetveit , an executive vice president with United Online .