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Ms. Jana Ash <br />January 28, 2009 <br />Page 3 <br />Qtotal - Qpump - Qprecip + Qevap <br />or <br />Qtotal = 4.39 gpm - 0.40 gpm+ 0.70 gpm = 4.69 gpm <br />A daily accounting of the water balance for the test is presented on Table 3. The column labeled 1 <br />is the cumulative pump data converted to a flow rate in gpm. Similarly, column 2 is the calculated <br />precipitation flow rate and column 3 is the evaporative flow rate. The net unregulated flow during <br />any point of the test can calculated by taking the pumping rate, subtracting the precipitation, and <br />adding the evaporation (column 4). Approximately 50 days into the test, the calculated unregulated <br />inflow became relatively stable, between approximately 4.5 and 5.5 gpm. <br />Since the unregulated flow calculated for the 90-day test (4.69 gpm) is less than one-quarter the <br />design standard (22.32gpm), it appears French Pit meets the State's guidelines as a lined gravel pit <br />reservoir. <br />Please notify us if you need additional information or have any questions or comments regarding <br />the leak test for French Pit. If this meets with your approval, please direct your approval letter to <br />my attention. <br />Sincerely, <br />DEERE & AULT CONSULTANTS, INC. <br />Scott A. Palmer, P.E. <br />Project Engineer <br />Roy . Spitzer, P.G. <br />Principal, Project Manager <br />cc: Mr. Jim Sittner, L.G. Everist <br />Matt Noteboom, L.G. Everist <br />Q \0201 LG Evr.HW0201 004. DO French Sndl.eak Tm7reach Pit Leak Test 90-day FINAL Repon doc