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KLE'/NI�ELOER <br /> , Bright People.RightSo/utions. <br /> 2 MONITORING ACTIVITIES <br /> tThe ET test pad has been monitored since 2006. For the current reporting period, the ET test <br /> pad area was monitored from July 2012 to June 2013. <br /> 2.1 RAINFALL MONITORING - <br /> Rainfall data was collected at the Test Pad between July 1, 2012 to June 30, 2013 (water year) <br /> (Table 1 and Appendix A). Rainfall data is collected using a tipping bucket rain gauge located at <br /> rthe test pad (west station). Rainfall data is measured in inches of rain and then converted to <br /> cubic feet water within the known volume of the test pad. The data is collected and analyzed <br /> each month during the rainy season (October through June). <br /> 2.2 RUN-OFF MONITORING <br /> Run-off is measured from precipitation falling on the test pad enclosure. Precipitation that does <br /> not seep into the ground surface soil travels along the test pad ground surface, collects at a <br /> central drain point, and is conveyed to the collection station located outside of the test pad area <br /> (Plate 4). Prior to this year, run-off from the Test Pad was measured using a dosing siphon with <br /> a cycle counter. The dosing siphon typically records 10 gallon increments. <br /> In February, 2012 a water level data logger was installed in the runoff surge tank to monitor <br /> real-time run-off trends and analyze the effects of evaporation. The water level logger was <br /> successful in proving that less than 10 gallons per year was running off of the test pad and <br /> would therefore not be recorded accurately with the dosing siphon system. This data indicated <br /> the need for a more precise measurement of runoff volume, and in September of 2012 a tipping <br /> bucket with data logging capabilities was installed at the outlet of the runoff drain. The data <br /> logger records the number of tips which is then converted to gallons based on the measured <br /> 10cc volume of the tipping bucket. According to the data collected, approximately 0.85 gallons <br /> 1 of run-off was measured during the 2012/2013 season. (Appendix A). <br /> 47717.11/ST013R0532 Page 4 of 10 August 30, 2013 <br /> Copyright 2013 Kleinfelder <br />