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NEIL O. An. ; CI
<br /> RSON.& AS ATES; INC.
<br /> r oE Rs /.ata
<br />-,J �
<br /> � GEOTECHNICAL•ENVIRONMENTAL•GROUNDWATER•INSPECTIONS•TESTING-LA130RATORY SERVICES
<br /> a N CORPORATE OFFICE SACRAMEN'T'O OFFICE
<br /> Z W 22 Houston Lane 4221 Northgate Boulevard,Suites
<br /> q rMCO (530)B91-5304 Lodi,California 95240 Sacramento;California 95834
<br /> 9 -TON (209)422-1691 -3701 -92b7 STOCK )sSOG
<br /> RANCHO Coti.oavA (916)631-4455 FAx (209),333-8303 FAX:(916)929-9269
<br /> December 19,2001
<br /> Jab No.LGOO-339
<br /> Mr. George Rose
<br /> Western Asset Recovery
<br /> 900 Post Road 1-M
<br /> Oakdale, CA 95361
<br /> FED
<br /> Re: Addendum, Soil Suitability/Nitrate Loading Study JAN 0 7 200z
<br /> Cometa and Edwards Road,.Oakdale'California � V1RQ
<br /> LA-O1-73,Parcels 21,22;23,24,
<br /> 25 26 27;and 28 pRMN S R1 NF HEALTH
<br /> MS-01-33,Parcels 1,.2, 3, and Remainder ICES
<br /> Dear Mr.Rose,
<br /> Per your request,we have completed our'evaluation of twelve(12)parcels located northwest of the
<br /> intersection of Cometa and Edwards Roads in Valley Home,California, This work was performed as a new
<br /> addendum to a Soil Suitability/Nitrate Loading Study dated October 12,2000. Four(4)previous addendum
<br /> letters dated November 27,2000,April 12,2001,August 21,2001,and November 27,2001 were prepared,
<br /> to supplement the original report or respond to'questions from.San Joaquin County Public Health Services,
<br /> Environmental Health Division (SJC PHS-EHD). This is the fifth addendum letter for the project.
<br /> Genera[ '
<br /> We were asked by George.Rose to complete percolation tests and prepare an.addendum letter for,
<br /> the original Soil Suitability/NitfateLoading Study for submittal to SJC PHS-EHD. This involved conducting
<br /> twenty-four(24)percolation tests,a shallow and deep percolation test on each of the twelve(12)new parcels.
<br /> 'A conversation with Ms.Lisa Medona,;R.E.H.S.with SJC PHS-EHD;indicated that a report amendmentwill
<br /> be required for project approval.- She also indicated that this phase of the project involves a lot line
<br /> adjustment number LA-O1.-73and minor subdivisionnumberMS-01-33. Thelotlineadjustment(LA-01-73)
<br /> includes Parcels 21,22, 23,24,25, 26, 27, and 28. The minor subdivision MS-01-33) includes Parcels 1; f
<br /> 2,3,and the remainder parcel The twelve(12)new proposed residential parcels range in fr m 2.10 to
<br /> 10.78 acres..Please see attached maps for parcel location and percolation tests location-
<br /> Test Borings
<br /> On November,15, 17 and Deceffiber 4,2001,the percolation test borings were drilled. One shallow
<br /> and'one deep percolation test hole was drilled on each parcel. Generally, the soils were fairly consistent.
<br /> throughout the site. A brown sandy silt or brown sandy clay was encountered in the shallow depths up to
<br /> about 2.5-feet deep. Typically located below the surface soil is a brown siltyfine to medium sand. Within .
<br /> the brown silty finc.to medium sand is often a fairly clean fine to medium sand whose thickness is between
<br /> about 3-feet to 7-feet. Occasionally clayey soils were encountered. The percolation tests were set adjacent
<br /> to a permeable soil layer. The depth to the first permeable soil layer is presented in Table 1.
<br />
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