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PARTI <br />Page No. 4 <br />Permit No. COG-500000 <br />form of communication. To approve a chemical (including release agents), the Division must have the chemical's MSDS <br />sheet. All chemicals must be used and stored in accordance with the manufacturers recommendations and in accordance <br />with any applicable state or federal regulation. <br />7. There shall be no discharge of solid animal or food waste, vegetative wastes (grass, leaves, manure, garbage, etc), or any <br />floating solids or visible foam, in other than trace amounts. <br />8. All discharges must comply with the lawful requirements of federal agencies, municipalities, counties, drainage districts <br />and other local agencies regarding any discharges to storm drains systems, conveyances, or other water courses under their <br />jurisdiction- In addition, prior to the discharge the permittee must notify the owner of the system of the date, approximate <br />time, location, and duration of the discharge(s). <br />9. Bulk storage structures for petroleum products and other chemicals shall have secondary containment or equivalent <br />adequate protection so as to contain all spills and prevent any spilled material from entering discharged waters or waters of <br />the State. <br />B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS <br />1. Effluent Limitations and Monitoring Requirements - Crushed Stone, Construction Gravel and all other industrial <br />facilities covered under SIC Code 14 (not covered below) <br />a. Crushed Stone -means process wastewater generated during the mining or quarrying and processing of crushed <br />and broken stone and rip rap. This includes all types of rock and stone, exc t rock and stone that is crushed or <br />broken prior to the extraction of mineral, which is covered elsewhere. The processing of calcite, however, in <br />conjunction with the processing of crushed and broken limestone or dolomite is included. <br />b. Construction Sand and Gravel- means process wastewater generated during the mining and processing of sand <br />and gravel for construction or fill uses. <br />The above categories are subject to 40 CFR Part 436 Subparts B (Crushed Stone), and C (Construction Sand and Gravel). <br />These limitations also apply to all other industrial facilities covered under SIC Code 14 (that are not covered below). The <br />following limitations apply as outlined in these subparts. <br /> Liitations Aonitoring <br />Parameter 30-Day 7-Day Daily Rationale Frequency I <br /> A ??' ??vg. Max. _ _ .. _ _..z .. <br /> --- -General Permit Requirements <br />Flow, MGD <br />Report <br />NA <br />Report <br />Discharge Evaluation Continuous / <br />Instantaneous' <br />pH, s.u. N/A NA 6.5-9.0 Water Quality Standards Weekly <br />Oil and Grease, mg/1 N/A NA 10 State Effluent Regulations Weekly <br />Total Suspended Solids, mg/1 30 45 NA State Effluent Regulations Weekly <br /> Site Specific Limitation <br />Total Dissolved Solids, mg/l * Report NA Report Salinity Regulations Quarterly 4 <br />Total Phosphorus (as P), mg/l ** Report NA Various Control Regulations ` Monthly <br />Other Pollutants of Concern Various NA Various Water Quality Standards Weekly <br />Sampli <br />Type, <br />Recorde <br />In-situ <br />Grab <br />Visual <br />Grab <br />Grab <br />Grab <br />Grab <br />Whole Effluent Toxicity (WET) State Permit Limitations Quarterly 3 Grabfl <br />Chronic Stat Diff and IC25 > IWC Quarterly Grab <br />Acute LC50 > 100% <br />1 - For a minor facility, as determined by the EPA NPDES Permit Rating Worksheet, all weekly monitoring requirements shall be changed to 2 days per month. <br />2 - If power is not available, flow may be measured on an instantaneous basis. Major facilities shall monitor flow weekly, minor facilities 2 days / month <br />3 - If a visual sheen is noticed, a gab sample must be taken and analyzed for oil and grease <br />4 - Quarterly monitoring shall be prescribed if the limitation is based upon discharge to the Colorado River Basin. If the limitation is based upon agricultural protecticr <br />the monitoring frequency shall be weekly. <br />*'Me TDS limitation will normally apply to discharges in the Colorado River Basin. <br />** The phosphorus limitations apply to discharges to the Dillon Reservoir Watershed, Cherry Creek Reservoir Watershed, Chatfield Reservoir Watershed, and the Bea <br />Creek Watershed, as defined in Regulation 71, 72,73 or 74 respectively. The permittee maybe required to obtain a phosphorus allocation from the applicable contrc <br />regulation authority prior to certification under this general permit.