Laserfiche WebLink
COLORADO DEPARTMENT OF HEALTH <br /> Water Quality Control Division <br /> Rationale Page 3 <br /> Permit No. CO-0000396 <br /> EFFLUENT LIMITATIONS, RATIONALE AND MONITORING FREQUENCIES: <br /> The limitations shown below were chosen for outfall 009. They represent the <br /> more stringent (with noted exceptions) of those in Table 1. <br /> Monitoring <br /> Parameter Limitation Rationale Frequency <br /> Flow, MGD N/A Monitoring Weekly <br /> pH, s.u. 6.5 - 9.0 WQS Weekly <br /> Oil and Grease, mg/l 10 SES Weekly <br /> BOD5, mg/l 30/45/60 1/ SES Monthly <br /> TSS, mg/l 35/70 Z/ BAT Monthly <br /> Total Iron, mg/l 3.5/7.0 2/ BAT Monthly <br /> Fecal Coliform, No/100ml 6,000/12,000 SES Monthly <br /> Settleable Solids, ml/l 0.5 3/ BAT Monthly <br /> Salinity N/A Salinity Standards Quarterly <br /> 1/ SES - 30/45 (30-day/7-day average). A daily maximum limitation of 60 is <br /> included to facilitate monitoring. <br /> 2/. These limitations do not apply to storm-related discharges (see permit). <br /> TSS limitations based on BAT were chosen over SES because 10.1.3(3), State <br /> Regulations for Effluent Limitations, states that where federal technology <br /> based guidelines exist they shall take precedence over SES. <br /> 3/ This limitation applies to discharges caused by precipitation less than <br /> the 10-year, 24-hour event. <br /> Influent Monitoring <br /> In order to assess the significance of the bath house flow, the permittee will <br /> be required to sample the flow prior to entering the pond. Required <br /> parameters and monitoring frequencies are shown on page 5 of the permit. This <br /> influent monitoring will be required for one year, beginning on the effective <br /> date of the amendment. At the end of all monitoring, the division will <br /> analyze the results. At that time the division may determine that limitations <br /> are necessary at the point where the flow enters the pond or that further <br /> monitoring is needed. It may be determined that no action is needed. Each <br /> facility is different and without a sufficient data base no course of action <br /> can be determined. The one-year monitoring program will provide this data <br /> base. It should be noted that if additional limitations or other permit <br /> changes become necessary, the permit modifications will be subject to public <br /> notice. <br /> - jl -- <br />