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4 GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> - A N D A S 5 O C I A T E S IINSPECTIONS a TESTING <br /> i <br /> LABORATORY SERYICES <br /> r POOL ENGINEERING <br /> POST TENSION DESIGN <br /> rMarch 30, 2005 <br /> NOA Project Number: E05041A <br /> FMr. Dennis Sacc/one <br /> Sacchone Construction <br /> t 4302 Mallard Creek Circle <br /> i r Stockton, Ca <br /> Subject: Engineered Septic System Design - 1 <br /> r 2"d Berolzheimer Residence <br /> 14.00-Acre Parcel, APN 121-030-005 <br /> 3548 Country Club Circle, Stockton <br /> Dear Mr. Sac�ione, <br /> Per your request, our office has completed a design for an engineered septic system to serve a <br /> proposed four(4) bedroom residence. An engineered septic system consisting of a raised mound <br /> was required by the San Joaquin County, Environmental Health Department due to the shallow <br /> ground water conditions in the area. <br /> At your request, your architect has provided our office with detailed site plans for the home. This <br /> plan was the basis for the base map for the engineered septic system design. <br /> Soil Conditions and Percolation Test <br /> A three foot deep soil boring was excavated in the general area of the septic system to <br /> investigate the soil properties of the existing soils. Groundwater was observed varying from <br /> between T and 2.5' over several days. The soil was found to be a fat clay, with some organic <br /> matter entrapped which graded into a brown moist clayey silt to silty sand. <br /> OneP ercolation test hole was drilled to a depth of 18"on 03/24/05. The percolation test hole was <br /> constructed by first placing about 1 to 2 inches of pea-gravel in the bottom. Next, a 1.5 inch <br /> perforated pipe was placed in the hole. Then pea-gravel was added in the annular space around <br /> " the pipe up to about a foot in height. The hole was pre saturated 24 hours prior to testing the hole <br /> with a level 12" above the bottom of the hole. <br /> A one hourP ercolation test was performed by Daniel Kramer of our office on 03/29/05 using an <br /> electric well sounder with an depth accuracy of 1/100th foot. After water drop was observed, the <br /> hole was checked for refill. The refill level was approximately 0.5 ft (6 inches) of water above the <br /> bottom level of the percolation test hole. The readings were taken approximately every 10 minutes <br /> LODI ■ SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi, California 95240 ■209.367.3701 M 209.369.427-8 ■www.noanderson.corn <br /> # 1 <br /> i <br /> i <br />