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,R <br /> NEIL,O.-ANi ..I RSON &ASSOCIATES INC. <br /> ID F It 3 <br /> GEOTECHNICAL•ENVIRONMENTAL•GROUNDWATER•INSPECTIONS•TESTING-LABORATORY SERVICES <br /> ,� CORPORA'T'E OFFICE SACRAMENTO OFFICE <br /> Z r: 22 Houston Lane 4221 Norffipte Boulevard,Suite6 <br /> p CMCD ($30)891-6304'. Lodi,California 95240 Sacramento,California 95834 <br /> 4`sS 0 STOCKTON (209)472-1D91 (209)367-3701 (916)929-9267 <br /> ` - RANCHO CORDOVA (916)631-4455 FAX:(209)333-9303. _ FAX:(916)929-9269 - <br /> August 21,2001 <br /> Job No.LG04-339 :. <br /> 'Mr.George Rose, <br /> Western Asset Recovery , <br /> 900 Post Road . <br /> Oakdale,CA 95361 w <br /> Re: Addendum, Soil Suitability/Nitrate Loading Study <br /> 12897 South Comets Road,Oakdale California _ <br /> LA-O l-04 <br /> Dear Mr.Rose; <br /> -Per your request,we have completed our evaluation of eleven(11)newt proposed residential parcels <br /> located northwest of the intersection of Cometa and Edwards Roads in Valley Home,California..-This work <br /> was performed as anew addendum to a Soil'Suitability/Nitrate Loading Study dated October 12;2000: Two <br /> (2)addendum letters dated November 27,2000 and dated April 12,2001 in addition to this letter,supplement <br /> the original.report. <br /> General <br /> Eleden (11)neve proposed residential'' arcels, whose size manges from 2.10 to 2.47 acres, are <br /> planned to be included as'part of the residential development: The location of the eleven(1.1)parcels are <br /> shown on Plate no:`.1'. We understand from San-Joaquin County-Public Health Services, Environmental <br /> Health Division (SJC PHS-EHD) that additional percolation tests and an-'addendum letter to the.Soil' . <br /> Suitability/Nitrate Loading Study dated October 12,2000 would be required for the project. <br /> Our scope of work included conducfin eight' 8 new ercolation tests one on each of eight 8 <br /> P g ( } P ( } <br /> parcels which have not received'a,test. Three(3)of the eleven(11)parcels are in areas which have been. " <br /> evaluated by a percolation test performed by our office during the first phase of percolation testing last year: <br /> In addition,an addendum letter,describing the,results of the testing and our recommendations was prepared. <br /> Test Borings <br /> On August 8, 0,and 16,2001,eigbt(8)percolation testborings were�drilled on eight parcels(Plate <br /> 1).,Generally,the eight(8)borings composed of similar materials which consisted of a mix of medium sand <br /> within a matrix of silt or clay:Below clayey suiface soils,sandy silt was the,predominate soil type.A thin <br /> clean sandy stratum was normally encountered between the depths of 7-feet to 21-feet. This sandy zone was <br /> selected for the percolation test:.The soils encountered during the drilling of the eight.(_8),percolation test <br /> holes,were similaiof the soil conditions encountered-at other locations of the site: <br />