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KLl: INFELDER <br /> I <br /> Nb = Background nitrate nitrogen concentration of rainfall recharge at the water table = <br />` 0.5 mg/1 (per Technical Memorandum, Hydrologic and Soil Investigation for the <br /> If Chico Urban Area, page 6, Dames and Moore, April 1996) <br /> Our calculation is as follows: <br /> N, = 0.026 2 35 1 —0.35 +0.5 12.75 = 1.183 + 6.375 <br /> 0.026(2)+12.75 = 0.59 mg/l as N <br /> 0.052 +12.75 <br /> CONCLUSIONS <br /> Based on the above evaluation, we conclude that wastewater produced by the proposed residence <br /> and barn should not cause the nitrate levels in groundwater below the site to rise above the state <br /> standards. Furthermore, the results of our percolation tests indicate that a conventional septic <br /> tank/leach trench sewage disposal system should adequately serve the proposed residence. A <br /> suitable soil strata for wastewater anon co � e 'dentifi �T * e for the <br /> proposed toilet fixture. Sewage from the proposed barn may need to be pumped or gravity fed to <br /> a suitable alternate location on the property or a specialized sewage disposal system, such as a <br /> mounded sewage disposal system, may need to be installed. <br /> LIMITATIONS <br /> The conclusions of this report are based on the information provided regarding the existing and <br /> proposed development and on the site conditions. It was assumed that the percolation test results <br /> are representative of the subsurface conditions in the general area. <br /> F <br /> This completes the scope of work requested. Our work was performed in general accordance <br /> with the standard of care that exists in San Joaquin County. No other guarantee or warranty, <br /> expressed or implied, is made. <br /> Respectfully submitted, <br /> KLEINFELDE C. <br /> ((y 91�,OFESS/ <br /> SV {4l <br /> Ronald E. Lout enhis ,��� Q'� N. 6�� f= <br /> Staff Engi <br /> No //2263 <br /> E. <br /> eot ical Department Manager <br /> A <br /> RE :lr Attachment cc: SKW and Associates <br /> 5 <br /> I <br /> 20-4683-01.G01/201 I R 1533 <br /> ©2001 Kleinfelder, Inc. December 12,2001 <br /> Page 4 of 4 <br />