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June 8,2001 <br /> Job Number:LGOI-141 <br /> Page 6 <br /> r <br /> A one-hour percolation test was conducted on May 18, 2001 in accordance with the <br /> requirements of San Joaquin County Environmental Health Division. The entire test was <br /> observed by Steven Shih, R.E.H.S. of that office. The result of the percolation test indicates a <br /> satisfactory percolation rate of 4.0 min/in was achieved. Mr. Shih signed and noted the <br /> percolation rate on the Liquid Waste Permit(percolation test permit) for the property(see <br /> permit copy in appendix). <br /> VII. CONCLUSIONS AND RECOMMENDATIONS <br /> In conclusion, a satisfactory percolation rate was achieved for the parcel. The percolation <br /> rate was measured at 4.0 min/inch at a depth of 2.5 feet. No ground water was encountered in <br /> the borings and the depth to ground water according to a recent San Joaquin County Flood <br /> Control and Water Conservation District ground-water map is about 19 to 24 feet below the <br /> ground surface at the site. The gradient for Fall 1998 and Spring 1999 ranged between 5 to 6.5 <br /> feet per mile northward. <br /> Based on the results of this study, our office has found the soils to be suitable for a septic <br /> system and leach lines and seepage pits for the proposed parcel. Please note that Silva Trucking <br /> does not have any plans to develop the property further or install a water well or septic system on <br /> the property. If a septic system were to be installed,we believe it would not negatively impact <br /> the ground water quality of the area. The design and installation of any septic system should <br /> follow the requirements established by the San Joaquin County Environmental Health Division. <br /> VIII. LIMITATIONS <br /> The conclusions of this report are based on the information provided regarding the <br /> existing and proposed development,the use of the subject property, and the site conditions as <br /> they existed at the time we excavated our test hole and performed the percolation test. It was <br /> assumed that the test hole and percolation test results are representative of the subsurface <br /> conditions in the general area. <br /> �f ISO <br /> i <br />