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NEIL O. AAeERSON & ASSOCIATES, INC. <br /> GEOTECHNICAL•ENVIRONMENTAL•GROUNDWATER•INSPECTIONS•TESTING•LABORATORY SERVICES <br /> to 3 Sln www.noandetson.w. CORPORATE OFFICE SACRAMENTO OFFICE <br /> 1 W eMA1L. noa&oanderson.eom 22 Houston Lane 4221 Nonhpte Boulevard,Suite 6 <br /> '\ CMCO. (530)891-6304 Lodi,Califomia 95240-2405 SaOmment0,Califunda 95834-1227 <br /> ,SSOC\p STOCKTON: (209)4n.101 (209)367-3701 (916)929-9267 <br /> RANCHOCOB VA, (916)631M55 FA :(209)333-8303 FA (916)929-9269 <br /> August 12, 2002 <br /> Our Job Number: LG02-140 <br /> Gary McEnerney <br /> Steele Realty and Investment Company,Inc. <br /> 8900 Grantline Road o <br /> Elk Grove, CA 95624-1414 Ill' <br /> - r- <br /> n <br /> Subject: Engineered Septic System Design/Percolation Tests _ <br /> MS-01-43,APN 008-110-23, Proposed Parcel 4 <br /> 18333 East Liberty Road v <br /> Acampo, CA <br /> C..0 <br /> Dear Mr. McEnerney: = <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. 4 of Minor <br /> Subdivision Application MS-01-43 (See Plate 1). A Soil Suitability Study performed by our office has <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 4 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 /> east-west 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 in the area of the proposed septic <br /> disposal field for Parcel 4. The initial percolation tests were performed in May, 2002 are described in <br /> detail in the Soil Suitability Report prepared by our office. Three(3)additional shallow 3-foot deep <br /> percolation tests were performed within an area designated by the property buyer. The additional <br /> percolation tests were performed within several hundred feet of the initial tests. The soil encountered <br /> was a cobble/gravelly to sandy clay loam. The slowest percolation rate measured was 125 min/inch. <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 were performed on August 1, 2002. These tests were observed by Lisa Medina, inspector San <br />