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PARTI
<br />Page No. 9
<br />Permit No.: CO-0032115
<br />c. Outfal-s 012, 013, 015, 016
<br />Parameter Freauencv Sample Type
<br />Flow, MGD Once per week Instantaneous or Continuous
<br />pH, s.u. (minimum-maximum) Once per week In-situ
<br />Oil and Grease, mg/1 Once per month Visual
<br />Total Dissolved Solids, mg/1 Once per quarter Grab
<br />Settleable Solids, ml/1 Once per month Grab
<br />Self-monitoring sampling by the permittee for compliance with the monitoring requirements specified above shall be
<br />performed at the following locations: outfalls 001, 002, 005, 008, 009, 011, 012, 013, 014, 015, 016, 017, 018, 019, 020,
<br />021, 022, 023, 024, as shown in Figures 2, 3 and 4.
<br />If the permittee, using the approved analytical methods, monitors any parameter more frequently than required by this pemrit,
<br />then the results of such monitoring shall be included in the calculation and reporting of the values required in the Dischazge
<br />Monitoring Report Form (DMRs) or other forms as required by the Division. Such increased frequency shall also be
<br />indicated.
<br />d. Oil and Grease Monitorine
<br />For every outfall with oil and grease monitoring, in the event an oil sheen or floating oil is observed, a grab sample shall
<br />be collected, analyzed, and reported on the appropriate DMR. In addition, corrective action shall be taken immediately
<br />to mitigate the discharge of oil and grease. A description of the corrective action taken should be included with the
<br />DMR.
<br />2. Salinity Parameters
<br />In ordez to obtain an indication of the quantity of Salinity, measured as total dissolved solids (TDS), being discharged from
<br />the site the permittee shall monitor the wastewater effluent at the following frequencies:
<br />Outfalls Freauencv Sample Tvpe
<br />001, 002, 005, 008, 009, 011, 012, 013, 014, 015, 016, 017, 018, 019, 020, Quarterly Grab
<br />021, 022, 023, 024
<br />Self-monitoring samples taken in compliance with the monitoring requirements specified above shall be taken at those
<br />locations listed in Part I.B.S.
<br />Where, based on a minimum of 5 samples, the permittee demonstrates [o the satisfaction of the Division that Ore level of total
<br />dissolved solids (TDS) in the effluent can be calculated based upon the level of electrical conductivity, the permittee may
<br />measure and report TDS in terms of electrical conductivity.
<br />3. Special Monitorinc
<br />a. Twelve Time Anah~sis - Outfalls 011, 017, 019.020, 021. 023
<br />In order to determine the quality of water discharged at this facility, the pemtittee is required to perform a twelve time
<br />analysis for the following parameters at outfalls 011, 017, 019, 020, 021, 023. The fast sampling shall occur during the
<br />first month after the perarit becomes effective, or when discharge commences, and sampling shall continue for the next
<br />eleven consecutive months. If no discharge occurs during the month, sampling shall resume when dischazge resumes and
<br />continue until twelve samples have been collected and analyzed using approved methods with method detection limits as
<br />low or lower than those specified in Part I.E.3. of the permit.
<br />A sumrnary report in the form of a letter shall be submitted to the Permits Unit by September 30, 2005. This report shall
<br />include all individual sample results collected over the twelve month period. If sampling is incomplete because no
<br />dischazge occurred during part or all of the period, this shall be noted in the report. If sampling has not yet been
<br />completed by [his date, this twelve time analysis requirement shall continue until twelve samples have been collected and
<br />analyzed and the results have been submitted to the Pemvts Unit. Monitoring results previously collected (1998 and
<br />more recent) maybe substituted for furure monitoring results such that the total is ] 2 results per pazameter.
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