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GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> AN D ASSOCIATES INSPECTIONS & TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> POST TENSION DESIGN <br /> March 18, 2004 <br /> NOA Project Number: LE03-437 <br /> Mark Schnabel <br /> 2624 Bristol Lane <br /> Lodi, CA 95242 <br /> Subject: <br /> Engineered Septic System Design <br /> 22750 Samra/Hayer Lane <br /> Acampo, California <br /> Dear Mr. Schnabel, <br /> Per your request, our office has completed an engineered septic system design for the proposed <br /> new four bedroom residence. The residence is presently under construction on a 4.85 net acre <br /> parcel located at 22750 Samra/Hayer Lane, Acampo, CA. The Assessor's Parcel Number is 007- <br /> 160-07. <br /> A percolation test was performed on the property by our office last October,2003. Please refer <br /> to the attached letter for details regarding the percolation testing conducted on the property. Due <br /> to the "unsatisfactory"percolation rate observed during the test, our office has prepared an <br /> engineered septic system design to help mitigate the poor soil conditions which exist on the <br /> property. Please refer to the attached sheets for design details. <br /> The location of the percolation test is shown on the attached plan. The location of the engineered <br /> system was moved away from that area and located in the front yard of the residence. The design <br /> size of the septic system reflects the poor soil conditions observed at the location of the <br /> percolation test. <br /> Sizing of the Leach Lines and Seepage Pits <br /> Since the percolation tests yielded no observed percolation, the final design size of the system <br /> was based on experience and judgement rather than a an observed percolation rate. Our office is <br /> aware of the limitations of the percolation test based on the Manual of Septic Tank Practice <br /> which cannot always measure the percolation rate in fine-grained or cemented soils. We believe <br /> the soils in the area do have some capacity to absorb the effluent. Other beneficial factors such <br /> as evaporation,plant transpiration, and wind are also helpful in removing moisture from the <br /> shallow soil zone. <br /> LODI ■ SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California 95240 ■209.367.3701 ■ 209.369.4228 ■w .noandersonxcnn <br />