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� KLEINFELDER approximately 30-minute intervals for four hours, refilling as necessary to maintain the prescribed amount of water over the gravel. Under the observation of a sanitarian (Michael Escotto) from the SJCPHS/EHD, the last 30-minute reading of the four hour period is recorded and used to calculate the percolation rate in minutes per inch. The estimated percolation rates are summarized below. A copy of our field percolation test results signed by Mr. Escotto is attached. P-1 10.0 3.5 P-2 3.5 no percolation Prior to our percolation testing, nitrate samples from the spray bar at the polishing pond and soil samples from adjacent to an existing leach field were obtained at the request of SJCPHS/EHD. The water sample from the spray bar was collected by an engineer from our firm on September 3, 2002 and submitted to FGL Environmental the following day on September 4, 2002. The chain-of-custody and test results are attached and indicated total nitrogen of 13 and nitrate plus nitrite as N of.3 mg/l. For your information, total nitrogen is a summation of nitrite, nitrate, free N, and ammonium. On September 6, 2002, a soil sample was obtained by a geologist from our firm adjacent to an existing leach line as shown on Plate A-1. The soil sample was taken at the depth of 3 feet and submitted to FGL Environmental. The total nitrogen concentration of this soil sample was .11 mg/l, and the results are attached. NITRATE LOADING CALCULATIONS Per SJCPHS/EHD requirements, the following summarizes our nitrate loading calculations for the existing leach field. As previously described, no modifications to the existing septic system has been proposed since no increase in patron usage is anticipated. Although published guidelines suggest waste quantities of approximately 125 gallons per restaurant seat and up to twenty people per house, it is fortunate that well usage information is available to more accurately document the waste stream volume at the restaurant and theatre. Attached are copies of a pump test report prepared by Power Hydrodynamics. There is a dedicated pump for the facility which is metered. Since the pump is the only one on the property, it is also used for landscape purposes during the spring, summer, and fall months. We have attached information on PG&E power usage for this dedicated pump. During the winter months, the approximate average power usage is 150 kilowatt hours. You have indicated that there are generally about twenty percent less customers during the winter than during the summer months. Although there is reduced landscape watering during the winter months, there remains a fountain in constant operation and some landscaping. For our computations we have assumed that the reduced flow because of fewer customers is offset by the water usage for the fountain and landscaping. According to the pump test, the required power usage to .pump one acre foot is 470 kilowatt hours. We have attached our hand calculations which were previously submitted to SJCPHS/EHD. In summary, approximately one-third of an acre foot per month or approximately 3,586 gallons per day is used by the facility "exclusive" of landscape use. Using 20-0268-01/ST02R886 December 5,2002 ©2002 Kleinfelder,Inc. Page 3 of 5