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ATTACHMENT C— INFORMATION SHEET C-4 <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 /> 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 /> Parameter Units Sample Sampling Reporting <br /> Type Frequency Frequency <br /> Flow Rate gpd Metered a Continuous Quarterly <br /> Biochemical Oxygen Demand mg/L Grab Monthly Quarterly <br /> Total Nitrogen b mg/L Grab Monthly Quarterly <br /> gpd denotes gallons per day. mg/L denotes milligrams per liter. <br /> a. Flow rate may be metered or estimated based on potable water supply meter readings or other <br /> approved method. Flow rates maybe measured as influent or effluent flow. <br /> b. Include nitrogen monitoring when a nitrogen effluent limit is imposed. <br /> Aerobic treatment units may be integrated in a treatment train and all components shall be <br /> inspected to verify operational status. It is highly recommended that a service agreement <br /> with a qualified service provider/vendor be required by the Regional Water Board's Executive <br /> Officer. Because aerobic treatment units generate more biosolids than septic systems <br /> (similar to the activated sludge process), systems shall be inspected and/or pumped at least <br /> as frequently as described below. Depending upon the amount of solids removed from the <br /> aerobic treatment unit, less frequent inspections may be allowed by the Regional Water <br /> Board's Executive Officer. Inspections of sludge and scum depth are not required if the tanks <br /> are pumped at least annually. <br /> Parameter Units Measurement Inspection/Reporting <br /> Type Frequency <br /> Sludge depth and scum thickness Feet Staff Gauge Quarterly <br /> in each compartment of each tank <br /> Distance between bottom of scum Inches Staff Gauge Quarterly <br /> layer and bottom of outlet device <br /> Distance between top of sludge Inches Staff Gauge Quarterly <br /> layer and bottom of outlet device <br /> Effluent filter condition NA NA Quarterly <br /> (if equipped, clean as needed) <br /> NA denotes not applicable. <br /> September 23, 2014 <br />