2017-05-11_PERMIT FILE - C1981012 (18)

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PART I Page 9 of 52 Permit No.: C00000906 ALTERNATE LIMITATIONS Any discharge or increase in the volume of a discharge is caused by precipitation within any 24-hour period less than or equal to the 10 -year, 24-hour precipitation event (or snowmelt of equivalent volume) may comply with alternate limitations subject to burden of proof requirements as described in the EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS section. The following limits for Fe(TR) and Settleable Solids may be substituted for the Fe(TR) and TSS limitations contained in the previous table. All other parameters remain unchanged. Alternate Limits Outfall 007 (less than or equal to the 10 -year, 24-hour precipitation event) ALTERNATE LIMITATIONS Any discharge or increase in volume of a discharge caused by precipitation within any 24-hour period greater than the 10 -year, 24-hour event (or series of storms or snowmelt of equivalent volume) may comply with alternate Limitations subject to burden of proof requirements as described in the EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS section. The following limits for Fe(TR) may be substituted for those contained in the previous table. All other parameters remain unchanged. Alternate Limits Outfall 007 (greater than the 10 -year, 24-hour precipitation event) ICIS Code Effluent Parameter Effluent Limitations Maximum Monitoring ICIS Effluent Parameter Concentrations Re uirements 30 -Day 7-DaV Daily Maximum Frequency Sample Code 00980 Fe, TR (pg/1) Avera a Average Type 00980 Fe, TR (pg/1) Monthly Grab Beginning July 1, 2018 1000 Through June 30, 2018 3500 Monthly Grab Beginning July 1, 2018 1000 Monthly Grab 00545 Settleable Solids (ml/1) 0.5 Monthly Grab ALTERNATE LIMITATIONS Any discharge or increase in volume of a discharge caused by precipitation within any 24-hour period greater than the 10 -year, 24-hour event (or series of storms or snowmelt of equivalent volume) may comply with alternate Limitations subject to burden of proof requirements as described in the EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS section. The following limits for Fe(TR) may be substituted for those contained in the previous table. All other parameters remain unchanged. Alternate Limits Outfall 007 (greater than the 10 -year, 24-hour precipitation event) ICIS Code Effluent Parameter Effluent Limitations Maximum Concentrations Monitorine Require ent.s 30 -Day 7 -Day Daily Maximum - Sample FrequencyType Avera a Avera a 00980 Fe, TR (pg/1) Through June 30, 2018 3500 Monthly Grab Beginning July 1, 2018 1000 Monthly Grab