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Oil and Grease Visual NA NA NA 2x/month Visual2 <br /> 84066 <br /> Oil and Grease, mg/l NA NA 10 Contingent2 Grab <br /> 03582 <br /> Site Specific Limitations <br /> Total Flow3 Report <br /> 515001 MG Qrtr Total NA NA Continuous' Calculated <br /> Iron, Total <br /> Recoverable, ug/l Report NA NA 2x/month Grab <br /> 00980 <br /> Total Dissolved <br /> Solids,4 mg/l Report NA Report Quarterly Grab <br /> 70295 <br /> 1: Flow- The chronic flow limit is equal to the flow rate provided in the permit application, and will be <br /> stated on the certification. If power is not available, flow may be measured on an instantaneous basis. <br /> 2: Oil and Grease: -A visual observation of the discharge for each permitted outfall must be made <br /> 2 times per month. In the event an oil sheen or floating oil is observed, a grab sample shall be <br /> collected, analyzed, and reported on the DMR. In addition, corrective action shall be taken <br /> immediately to mitigate the discharge of oil. <br /> 3: Total Flow - Total flow is the cumulative flow of the discharge for the quarter in million gallons. If <br /> continuous flow monitoring is not conducted, the permittee must calculate the total flow for the month <br /> or quarter using the 30-day average flow (measured) and the number of days the facility discharged <br /> within the month or quarter. <br /> 4: Total Dissolved Solids (TDS) -Analysis for salinity, measured as TDS, and a requirement to report <br /> quarterly total flow is required for all discharges to the Colorado River Basin. The requirement to <br /> report a mass-based loading (tbs. /day) may be added to the permit certification on a case-by-case <br /> basis. <br /> Modification 1: <br /> Modified and reissued date: 2/23/2022 Effective date: 3/1/2022 <br /> Modification 1 increased the design flow from 0.4 MGD to 3.6 MGD. <br /> Certification issued: 8/3/2021 Effective: 9/1/2021 Expiration Date: 12/31/2021 <br /> This certification under the permit requires that specific actions be performed at designated times. The <br /> certification holder is legally obligated to comply with all terms and conditions of the permit. <br /> Approved by <br /> Kathleen Rosow - Work Group Lead <br /> Industrial Et Natural Resource Extraction Permitting Unit <br /> Permits Section <br /> Water Quality Control Division <br /> Page 2 of 2 <br /> 4300 Cherry Creek Drive S,Denver,CO 80246-1530 P 303-692-2000 vww colorado gov/cdphe/wgcd I <br />