homework 5 - Vanessa Barela March 4, 2007 Enve 302 Homework...

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Vanessa Barela March 4, 2007 Enve 302 Homework #5 1. According to 40 CFR 133.105 a lagoon-based POTW facility is a stabilization pond that has a treatment equivalent to secondary treatment. In the NPDES permit the most stringent effluent of BOD 5 is 45/65 and TSS is also 45/65. For both the BOD 5 and the TSS the 7-day average compared to the NPDES permit is 45/45. The percent removal for BOD 5 and TSS is 65%, which is the same as the 65% removal in the question. There cannot be more stringent on either the effluent of percent removal unless the permitting authorities according to 40 CFR 133.105 (f) (2) shows that it is possible to obtain a more stringent limitation. For this new facility the permitting authorities determines that the effluent values that could be achieved through proper operation and maintenance, considering the design capability of the treatment process and geographical and climate considerations, would enable the treatment works to achieve more stringent limitations. The percent removal for a Standardized Discharge Monitoring Report (DMR) is a percentage expression of the removal efficiency across a treatment plant for a given pollutant parameter, as determined by the 30-day average values of the raw wastewater influent pollutant concentrations to the facility and the 30-day average values of the effluent pollutant concentrations for a given time period. A C BOD
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homework 5 - Vanessa Barela March 4, 2007 Enve 302 Homework...

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