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KLEINFELDER under sunny and warm weather and in accordance with accepted guidelines using clear potable water. The approximate depth of each percolation test below existing site grade is shown on the following table. All of the holes exhibited minor sloughing or caving (about 6 inches) after presoaking. The shallow percolation test was originally approximately 3.3 feet in depth. The holes were dry prior to testing. From a fixed reference point, a marked location on the side of / PVC pipe inserted into the hole, the drop in water level is measured in approximately 30-minute 5- intervals for four hours, refilling as necessary to maintain the prescribed amount of water over the gravel (SJCEHD Procedure #2). Under the observation of a representative from the SJCEHD, 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 a representative from SJCEHD is attached. Details of each test can be found on the percolation test sheet. (G,/1) Test Number Depth (feet) Percolation Rate (min./inch) P-1 2.6 9 9.5 7 14.6 6 7. CONCLUSIONS The results of our percolation tests indicate that suitable soil percolation strata exist at the location of the percolation tests. A suitable soil condition for septic percolation tests is defined as a stratum capable of percolating water at a rate of 60 minutes per inch (min/inch) at a depth of up to 3.5 feet below existing site grade and 30 min/inch for deeper tests. The existing permits on file with SJCEHD do not give distances from property lines for locating the system. Based on the location of the existing septic system as described to us by Mr. Gillies, we estimate that the tests were performed within approximately 10 feet of that system, as requested by Mr. Mike Huggins of SJCEHD for similar testing. We would anticipate that, with a(�,.: ) maximum of 4 full-time employees at approximately 15 gallons/day each (60 gallons/day), the estimated wastewater flow should be less than that produced by the former single-family residence (assuming 150 gallons/day). Based on the recent improvements made to the system and the estimated reduction in use, it is our opinion that the system, if functional, should be suitable for the proposed use. We would anticipate that the correct leach line lengths for the existing_E2ppLcs tem are probabl the lengths indicated on posed to the lengths given—on-the site n an. the exact len are re ire , a fine specializing in septic system inspection/repair should be co'ntacte� tic to veen�y the existing leach line lengths. 37210.601 /ST03L664 November 19,2003 0 2003 Meinfelder,tnc. Page 4 of 7