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• <br />' PART I <br />Page 6 of 29 <br />Permit No.: CO-0038776 <br />c/ - The seven (7) day average concentration shall be determined by an arithmetic <br />mean. At least three (3) samples, taken on three (3) separate days in a <br />seven (7) day period, are to be used in the calculation. Samples may not <br />be used for more than one (1) reporting period. (Not applicable to fecal <br />coliform determinations - please see footnote d/. <br />d/ - Fecal coliform bacteria average concentrations shall be determined by a <br />geometric mean. A minimum of three (3) or more samples collected in <br />separate calendar weeks during a thirty (30) consecutive day period with <br />a minimum of 20 days occurring between the first and last sample are to be . <br />used for the 30 day average. For the 7 day average, samples are to be taken on <br />three separate days in a 7 day period. <br />e/ - Any discharge beyond the above limitations for total residual chlorine, <br />oil and grease, and pH as indicated by any single analysis and/or measurement <br />shall be considered a violation of tfie conditions of this permit. <br />5. Facilities Operation <br /> <br />The permittee shall at all times maintain in good working order and <br />make adequate provision to assure proper and efficient operation of <br />the domestic wastewater treatment works, including the employment of <br />trained management and operations personnel, to achieve compliance <br />with the terms and conditions of this permit. Any sludge produced at <br />the wastewater treatment facility shall 6e disposed of in accordance <br />with State and Federal guidelines and regulations. <br />B. MONITORING REQUIREMENTS <br />1. Influent and Effluent Parameters (Domestic WWTP) <br />In order to obtain an indication of the probable compliance or non- <br />compliance with the effluent limitations specified in Section A, the <br />permittee shall monitor all effluent parameters at the following required <br />frequencies. <br />• <br />Effluent Parameter jf <br />Flow (WWTF), MGD <br />Measurement Frequency f/i/ Samole Tvpe ~/ <br />8005, mg/l <br />Total Suspended Solids, mg/1 <br />Fecal Coliforms, X/100 m1 <br />pH, s. u. <br />Oil and Grease, mg/1 <br />Total Residual Chlorine, mg/1 <br />Salinity <br />Weekly <br />Monthly <br />Monthly <br />Monthly <br />Weekly <br />Weekly <br />Weekly h/ <br />Quarterly k/1/ <br />Instantaneous <br />or Continuous <br />Composite <br />Composite <br />Grab <br />Grab <br />Grab or Visual <br />Grab <br />Grab <br />