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COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENV/RONMENT, Water Quality Control Division Amendment No. 1 -Rationale -Page 5. Permit No. CO-0044776 • Table V/-2 -- Monitoring Requirements for Outfall 004 (unless otherwise stated, manitorin,~ applies to Effluent) Parameter Measurement Frequency Sample Type /nfluent Flow, MGD Continuous Recorder Flow, MGD Continuous Recorder Influent Five-Dav Biochemical Oxygen Monthly Composite Demand (BODSJ mg/P (lb/day) Five-Day Biochemical Oxygen Demand Monthly Composite (BODE, mg/A Influent Total Suspended Solids, mg/P Monthly Composite Total Suspended Solids, mg/P Monthly Composite Fecal Coliform, No./100 mP Monthly Grab Total Residual Chlorine, mg/P Weekly Grab Oif and Grease, mg/P Weekly Visual pH, s. u. Weekly /n-situ 2. Biosolids Monitorine a) Biosolids Monitoring and Reporting: Permiaees that practice any methods of biosolids disposal, including • beneficial use, landfilling, or any combination of disposal methods, are required to determine and report the annual rate of biosolids produced. Annual biosolids production and a description ojbiosolidr disposal practices are to be included in an annual report. Additional requirements apply if land disposal for beneficial use is practiced. b) Land Application of Biosolids for Beni cial Use The discharge of solid waste to land for disposal is regulated by the Colorado Solid Wastes Disposal Sites and Facilities Act (30-20, Pan 1 C.R.S. 1973) Biosolids Regulations ,Regulation Number 64 Section 30.20-102(6) of the Act provides an exemption from the Certificate of Designarion requirement for biosolids which are used in a beneficial manner and where the disposal of such biosolids is designated as meeting all applicable regulations ojthe Department, including the Biosolids Reeulations. The Bowie No. 2 Mine wastewater treatment facility is a "Treatment Works Treating Domestic Sewage" (T'WTDS) as that term is defined in the Biosolids Relations. §64.9. As such, the requirements of the Biosolids Regulations are applicable to biosolids produced at this WWTF and which are land applied for beneficial use. The requirements imposed in this permit will be consistent with the Biosolids Regulations. See Part /.A.2.d. of the permit for specific requirements. There are pathogen reduction and vector attraction reduction alternatives, in addition ro those identified in Part I.A.2.d. of the permit which may be allowed per the Colorado Biosolids Regulations. §64.12.B and C. /f the permittee intends to use one of these alternatives the Division and EPA must be informed at least 30 days prior to its use. This change may be rttade without additional public notice. Requirements of the Biosolids Regulations are in addition to the monitoring requirements noted above. •