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ATTACHMENT C— INFORMATION SHEET C-5 <br /> MODEL MONITORING AND REPORTING PROGRAM <br /> STATE WATER RESOURCES CONTROL BOARD <br /> ORDER WQ 2014-0153-DWQ <br /> GENERAL WASTE DISCHARGE REQUIREMENTS <br /> FOR SMALL DOMESTIC WASTEWATER TREATMENT SYSTEMS <br /> Aerobic treatment units shall be pumped when any one of the following conditions exists: <br /> 1. The combined thickness of sludge and scum exceeds one-third of the tank depth of <br /> the final settling tank or interferes with the operation of the system (mixed liquor <br /> aerator solids shall not exceed the manufacturer's recommendation). <br /> 2. The scum layer is within 3 inches of the outlet device. <br /> 3. The sludge layer is within 8 inches of the outlet device. <br /> All pumping reports shall be submitted with the next regularly scheduled monitoring report. <br /> At a minimum, the record shall include the date, nature of service, service company name, <br /> and service company license number. <br /> ACTIVATED SLUDGE MONITORING <br /> Influent Monitoring <br /> Influent samples shall be taken from a location that provides representative samples of the <br /> wastewater quality. At a minimum, influent monitoring shall consist of the following: <br /> Constituent Units Sample Sample Reporting <br /> Type Frequency Frequency <br /> Total Nitrogen a mg/L Grab Monthly Quarterly <br /> mg/L denotes milligrams per liter. <br /> a. When needed for 50% reduction effluent limit calculation. <br /> Effluent Monitoring <br /> Samples of effluent shall be taken at an area that represents the effluent quality distributed to <br /> the disposal area. At a minimum, effluent monitoring shall consist of the following: <br /> Constituent Units Sample Sample Reporting <br /> Type Frequency Frequency <br /> Flow Rate a gpd Meter Continuous Quarterly <br /> Biochemical Oxygen Demand m /L Grab Monthly Quarterly <br /> Total Suspended Solids mg/L Grab Monthly Quarterly <br /> Total Nitrogen b mg/L Grab Monthly Quarter) <br /> gpd denotes gallons per day. <br /> a. At a minimum, the total flow shall be measured monthly to calculate the average daily flow for the <br /> month. Flow rates may be measured on influent or effluent flow. <br /> b. Include nitrogen monitoring when a nitrogen effluent limit is imposed. <br /> " Determine the need for monitoring based on the flow rate and Attachment 1. Biochemical oxygen demand <br /> limits apply with flow rates above 400 gpd; nitrogen limits may apply at flow rates above 20,000 gpd. (See <br /> General Order Section D, Effluent Limits and Attachment 1, Nitrogen Effluent Limit Evaluation.) <br /> September 23, 2014 <br />