# Monthly Average Concentration definition

Monthly Average Concentration means the arithmetic mean of all Daily Concentrations of a contaminant in the effluent sampled or measured, or both, during a calendar month;
Monthly Average Concentration means the arithmetic mean of measurements made during the month.
Monthly Average Concentration means the arithmetic average (proportional to flow) of all daily determinations of concentration made during a calendar month. Daily determinations of concentration made using a composite sample shall be the concentration of the composite sample. When grab samples are used, the daily determinations of concentration shall be the arithmetic average (weighted by flow value) of all the samples collected during the calendar day.

## Examples of Monthly Average Concentration in a sentence

• The Monthly Average Concentration, a limitation on the discharge concentration, in milligrams per liter (mg/L), is the arithmetic mean of all daily concentrations determined in a one-month period.

## More Definitions of Monthly Average Concentration

Monthly Average Concentration means the average discharge concentration during 30-consecutive day period (for reporting purposes a calendar month). It shall be determined by the summation of all daily concentrations for 30 days (calendar month) divided by the total number of days on which the values were obtained. If more than one sample is taken on a calendar day, the average of all such samples shall be the daily concentration of the day.
Monthly Average Concentration means the arithmetic average (proportional to flow) of all daily determinations of
Monthly Average Concentration means the arithmetic mean of all samples collected in a calendar-month, expressed in units of mass per volume, for any pollutant.

## Related to Monthly Average Concentration

• Monthly Average Subscriber Level means the average number of Subscribers of the Licensee in a particular month, as set forth in the applicable month’s Subscriber Report (refer Schedule D).

• Net concentration means the difference between the concentration of a given substance in a sample taken of the discharge and the concentration of the same substances in a sample taken at the intake which supplies water to the given process. For the purpose of this definition, samples that are taken to determine the net concentration shall always be 24-hour composite samples made up of at least six increments taken at regular intervals throughout the plant day.

• Daily Concentration means the concentration of a substance as measured in a daily composite sample, or, arithmetic average of all grab sample results defining a grab sample average.

• Derived air concentration or "DAC" means the concentration of a given radionuclide in air which, if breathed by the reference man for a working year of two thousand hours under conditions of light work, results in an intake of one ALI. The condition of light work is inhaling 1.2 cubic meters of air per hour for two thousand hours in a year. DAC values are given in appendix C to rule 3701:1-38-12 of the Administrative Code.