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hours (e.g., 1 hour and 15 minutes would read 125 hours on the ETM).Additional EC meters record the number of times selected floats are raised. The Drainfield Flow Calculation Worksheet(Form 3)is intended to assist with the analysis of flow data on a monthly basis.Transfer the raw data from the paper copy of Form 2 to the spreadsheet version of Form 3 to automatically calculate the average daily flow. Calibration of the pumps and meters should be done on an annual basis. 7.1 Manual Calculations If the spreadsheet version of Form 3 is not used,manual flow calculations should be done primarily using the ETM method.The ETM and EC data can also be used to calculate flows and troubleshoot problems.The estimated gallons per cycle and actual(measured)flow rate of the pumps(in gallons per hour)were calibrated during system start-up and are shown in the column headings. Enter the data from Form 2. Subtract the current readings from the previous readings to calculate the difference(e.g., AEC and^ETM).For the AEC method,add the cycles(^EC)for the period for each pump and multiply by the gallons per cycle.This will give you the total gallons for the period.Divide this total by the number of days in the period to get the average daily flow.Repeat this process for the run times(AETM).The values should be very similar. A general flow pattern should become apparent during normal operations.The flows should follow usage patterns(number of people).On a seasonal basis,the average daily flow to the drainfield is expected to average around half of the design flow. In this case,average flows to the drainfield during the summer are expected to average about 600 gpd. The projected daily flow for the facility is 1,170 gpd but the peak design flow is 1,350 gpd. The actual values should correlate with the number of people using the system.Higher-than-expected values could be related to infiltration or inflow somewhere within the system(leaky fixtures or pipes, damaged tank, etc.). 8.0 INSPECTION, MONITORING AND MAINTENANCE The Semi-Annual Inspection Checklist(Form 4)is used to document periodic monitoring and maintenance activities. 8.1 Screen Inspection and Cleaning It is necessary to inspect the pump vault screen on a periodic basis and clean as needed. Semi-annual inspection and cleaning is recommended, at least initially,to assess the degree of accumulation and clogging between cleanings. The frequency can then be adjusted based on operational experience.This will involve removing the fiberglass lid from the outlet riser of the surge dosing tank. Lift the biotube cartridge out of the pump vault using the handle provided. If not cleaned regularly,the weight of accumulated solids may add enough weight to the cartridge to make removal difficult. If the screen tubes appear to have material accumulating and blocking the 1/8-inch openings(greater than or equal to 25 percent),clean them immediately.There is a plastic grate on top of the tank at the inlet end of the surge dosing tank. Set the biotube cartridge on the top of the grate and spray with a high-pressure nozzle rinsing the material into the tank.Replace the cartridge in its housing and secure the lids. Record observations and actions on Form 4. CES-Albany,OR St.Innocent Winery and Tasting Room 0&M Manual Doc:2018240028 St.Innocent Winery OM BTR May 2018 I Page 4