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~~ COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division Summary of Rationale - Page 12, Permit No. CO--0042439 VII. TERMS AND CONDITIONS: D. Monitoring: 1. Influent and Effluent Monitoring: Influent and effluent monitoring will be required as shown in Table VII-3. Refer to the permit for locations of monitoring points. Table VII-3 -- Influent and Effluent Monitoring Requirements Parameter Influent Flow, MGD Influent BODS, mg/1 Clb/~iay} Influent Total Suspended Solids, mg/1 Effluent Flow, MGD Effluent BODS, mg/1 (lb/~iay) Effluent Total Suspended Solids, mg/1 (lb/day) Effluent Fecal Coliform, ~/100 ml Effluent Total Residual Chlorine, mg/1 Effluent pH, s.u. Effluent 011 and Grease, mg/1 Frequency Sample Type 3 R/Week Monthly Monthly 3 R/Week Monthly Monthly Monthly Weekly Weekly Weekly Calculated Composite Composite Instantaneous Grab* Grab Grab Grab Grab Visual** * Sample must be collected prior to dechlorlnation of the effluent. ** If a visible sheen is. noted, a grab sample shall be collected, analyzed for oil and grease and reported as an attachment to the DMR. 2. Salinity Monitoring: In compliance with the "Regulations for Implementeition of the Colorado Salinity Standards Through the CDPS Permit Program", the permit tee shall monitor for salinity on a quarterly basis. Samples shall be taken at both the raw (potable) water supply intake prior to any treatment and at discharge point 001 following dechlorination. After two years of sampling, a report must be submitted summarizing the increment,il salt load being contributed to the Colorado River basin due to the use of water in this domestic system. Salinity requirements are included in Part I, Section B.3 of the permit.