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STORMWATER MANAGEMENT PLAN MORRISON QUARRY <br /> REVISION NO.8 1 August 2022 CERTIFICATION NO.COG500320 <br /> storm event sampled and the end of the most recent storm event that produced <br /> a discharge. <br /> • Results of observations of the stormwater discharge; <br /> • Probable sources of any observed stormwater contamination; and <br /> • If applicable, why it was not possible to take samples within the first 30 minutes. <br /> 6.3 EFFLUENT LIMITATIONS <br /> Process water monitoring is required for this facility. Data must be reported to the Division <br /> using a Discharge Monitoring Report (DMR). Parameters to be monitored, discharge <br /> limitations maximum concentrations, monitoring frequencies and sample types are as <br /> follows: <br /> DISCHARGE LIMITATIONS <br /> PARAMETER UNITS MAXIMUM CONCENTRATIONS MONITORING SAMPLE <br /> 30-DAY 7-DAY DAILY FREQUENCY TYPE <br /> AVERAGE AVERAGE MAX. <br /> Flow], 50050 MGD 0.08 NA Report Instantaneous In-situ] <br /> Monthly <br /> pH, (Minimum- S.U. NA NA 6.5-9.0 2x/month Grab <br /> Maximum), m- <br /> Total Suspended <br /> Solids, 00530 mg/I 30 45 NA 2x/month Grab <br /> Oil and Grease Visual, <br /> NA NA NA 2x/month Visua12 <br /> 84066 <br /> Oil and Grease, 03582 mg/I NA NA 10 Contingent2 Grab <br /> Site Specific Limitations <br /> Electrical Conductivity dS/m Report NA NA Quarterly Grab <br /> (EC), 00094 <br /> Phosphorus, Tota13 <br /> 00665 mg/I Report NA NA Monthly Grab <br /> 1: Flow-The chronic flow limit is equal to the flow rate provided in the permit application, <br /> and is stated on the certification. If power is not available, flow may be measured on an <br /> instantaneous basis. <br /> 2: Oil and Grease:-A visual observation of the discharge for each permitted outfall must <br /> be made 2x/month. In the event an oil sheen or floating oil is observed, a grab sample <br /> 25 <br />