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ATTACHMENT C— INFORMATION SHEET C-3 <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 /> Parameter Units Measurement Inspection/Reporting <br /> Type Freuenc <br /> Sludge depth and scum thickness Feet Staff Gauge Annually <br /> in each compartment of each tank <br /> Distance between bottom of scum Inches Staff Gauge Annually <br /> layer and bottom of outlet device <br /> Distance between top of sludge Inches Staff Gauge Annually <br /> layer and bottom of outlet device <br /> Effluent filter condition NA NA Annually <br /> (if equipped, clean as needed) <br /> NA denotes not applicable. <br /> Septic tanks 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 first compartment. <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 /> If a septic tank is pumped during the year, the pumping report shall be submitted with the <br /> annual report. All pumping reports shall be submitted with the next regularly scheduled <br /> monitoring report. At a minimum, the record shall include the date, nature of service, service <br /> company name, and service company license number. <br /> AEROBIC TREATMENT UNIT MONITORING 10 <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 m /L Grab Monthly Quarter) <br /> mg/L denotes milligrams per liter. <br /> a. When needed for 50% reduction effluent limit calculations. . <br /> 10 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 />