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G EOTECN N ICAL <br /> �I NEIL 4. ANDERSON ENVIRONMENTAL <br /> AND ASSOC IATES INSPECTIONS a TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> POST TENSION DESIGN <br /> April 24, 2006 <br /> NOA Project Nutnbet: T-05139B <br /> Rodney Esttada,land Use Program <br /> San Joaquin County,Environmental Health Department <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, California 95202 <br /> Subject: ADDENDUM LETTER <br /> SOIL SUITABILTTX STUDY <br /> MQFFTT PROPERTY <br /> 25744 EAST LONE TREE ROAD <br /> ESCALON,CALIFORNIA <br /> Dear Rodney, <br /> In the Soil Suitability Report for the Moffit property, dated Februatv 24,2006,our office <br /> recommended a modified filter bed design for the proposed septic disposal areas of the Site. This <br /> tecon=cndation was incorrect because of the failing rates of shallow percolation tests. The soils <br /> within the deep Percolation test areas in the sewage disposal locations of the site have demonsxatr_d <br /> a satisfactory percolation rate. Please sec the following for the cottected septic system design <br /> recommendation. <br /> -Surnmary of Petcolation Tests. <br /> Test Ytio., Percolation Percolation Rate Test Gomment <br /> Date Tested Tcst Depth(ft) (minutes/inch) Duration (see notes) <br /> P-1 Shallow 3.32 No movement 4 ht failing percolation rate <br /> 2-1-06 1 _ <br /> P-1 Deep 2415 1.67 1 hr Satsfaaory percolatio't rate <br /> 2-1-06 <br /> P-2 Shallow 3.23 No movement 4 hr failing,percolatiml Iate <br /> 2-1-06 <br /> P-2 Deep 24.441.67 1 ht Satisfactoy pctcolatioa rate <br /> 2-1-06 <br /> Note: A satiSEictory percolation tate for a"shalloV'test is Ics;than or equal to 60 misutcs pct in h. <br /> A satisfactory percolation rate for a"deep"testis less than.or equal to 30 minutes per Tach. <br /> LODI ■ SACRAMENTO ■ MODESTO M RENO <br /> ENNRONMENTAL DIVISION 9021ndwmzj Way,l.odi,Califomia 95240 ■209567.3701 ■ 2(]9.369.4229 fax ■worw.r.oaadexson.:-om <br />