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�p E R 90 NEIL O. AItir1ERSON & ASSOCIATES, INC. <br /> p y GEOTECHNICAL•ENVIRONMENTAL•GROUNDWATER•INSPECTIONS•TESTING•LABORATORY SERVICES <br /> D .n W BSTM w moandenon.com CORPORATE OFFICE SACRAMENTO OFFICE <br /> Z au EMA noa@noauderson.com 22 Houston lane 4221 Nonhgate 130ulewwd,Suite 6 <br /> CIBCO'. (53o)991a3oa La di,California 95240- <br /> y p 2405 916)929-9 C9 ifomia 95834-1227 <br /> SfOCKTON' (2(9)en (-1091 (209)367-3701 (9I6)929-9267 <br /> RANCHO COROOVA. (916)631 4 55 FAX'(209)333-8303 FAX (916)929-9269 <br /> August 12, 2002 <br /> Our Job Number: LG02-140 <br /> Gary McEnemey <br /> Steele Realty and Investment Company, Inc. <br /> 8900 Grantline Road <br /> Elk Grove, CA 95624-1414 <br /> Subject: Engineered Septic System Design/Percolation Tests <br /> MS-01-43,APN 008-110-23,Proposed Parcel 1 <br /> 18333 East Liberty Road <br /> Acampo, CA <br /> Dear Mr. McEnemey: <br /> Per your request,our office has completed additional percolation testing and has provided an <br /> engineered septic system design for a new residence to be located on Proposed Parcel No. 1 of Minor ; <br /> Subdivision Application MS-01-43 (See Plate 1). A Soil Suitability Study performed by our office hasP'i-a ("(� <br /> found this property was suitable for an engineered septic system due to low percolation rate measured <br /> (Neil O. Anderson&Assoc., 2002). <br /> The engineered septic system for proposed Parcel I was designed for a future 4 bedroom <br /> residence to be occupied by 5 people. The septic system leach field was located and staked by the <br /> property buyer. The proposed leach field was found to vary in elevation up to several feet. We believe a <br /> north-south layout would best follow the elevation contours. <br /> Our office has prepared an engineered septic system design based partly on the percolation rates <br /> measured during the Soil Suitability Study completed in May,2002 and mainly on additional percolation <br /> tests performed in August,2002. The system calculations,percolation test field sheets and system <br /> drawings are attached to this letter. <br /> I. Percolation Tests <br /> A total of five(5)percolation tests have been performed at two(2)different locations on the <br /> Parcel 1. The percolation tests performed in May,2002 are described in detail in the Soil Suitability <br /> Report prepared by our office. Three(3)additional shallow 3-foot deep percolation tests were performed <br /> in an area designated by the property buyer. The soil encountered was a gravelly to sandy clay loam. <br /> The results of these three(3)additional percolation tests helped to determine the percolation rae for <br /> which the system design was based. <br /> For each of the 3-foot deep percolation test holes,the bottom 6-inches was filled with pea gravel. <br /> A 2-inch open ended and slotted PVC pipe was place on the bottom and backfilled with about 1-foot of <br /> pea gravel in the annular space. The hole was then saturated with 12 inches of water 24 hours prior to <br /> the percolation test. To run the test,the holes were filled with water to 6-inches above the bottom and the <br /> water drop was measured each 1/2 hour for a period of 4 hours.The additional percolation test holes for <br /> Parcel 1 were performed on August 1,2002. These tests were observed by Lisa Medina, inspector San <br />