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S. <br /> k D <br /> KLEINFELDER 0005ZOQOI <br /> F An employee owned company <br /> File No. 20-1108-31.G02 ENVIRONMENT HEALTH <br /> NPERMiT/SERVIOES <br /> November 212000 <br /> y <br /> Mr. Sam Cox 2, <br /> Granite Construction Company <br /> Post Office Box 151 NOV 27 21798 <br /> ` Stockton, California 95201 GZ Ni r c(Utp—6 e, w- l i <br /> Subject: SOILS SUITABILITY STUDY <br /> XTON <br /> SUPPORT BUILDING LEACH FIELD <br /> BNSF STOCKTON INTERMODAL FACILITY <br /> SAN JOAQUIN COUNTY, CALIFORNIA <br /> Dear Mr. Cox: <br /> W Kleinfelder is pleased to present the results of our soil suitability and nitrate loading study for the <br /> proposed Support Building Leach Field to be located at the BNSF Stockton Intermodal Facility <br /> in San Joaquin County, California. The purpose of our study was to determine the suitability of <br /> the property for septic tank usage. The study was performed in general accordance with the <br /> requirements of Section 9-10100© of San Joaquin County Ordinance. The following includes <br /> background information regarding the proposed development, present and past use'iof the site, <br /> and the historical groundwater depths in the project area. In addition, discussions regarding our <br /> investigative procedures and the site conditions encountered during our field exploration and the <br /> results of percolation tests are presented. Finally, the results of our nitrate loading calculations <br /> and project limitations are provided. <br /> PROPOSED DEVELOPMENT <br /> On a preliminary basis, we understand the subject leach field will service support buildings. We <br /> understand the bathrooms will have a total of 6 commodes, 6 to 8 urinals and 4 to 5 sinks. Based <br /> on this information, we anticipate the on-site sewage disposal system will have a conventional <br /> 1,500 to 2,000 gallon septic tank. We anticipate that disposal trenches may be cut deep to <br /> intersect suitable percolating soils or shallow leach lines will lead to a seepage pit fon disposal of <br /> effluent. <br /> PRESENT AND PAST USE OF THE SITE <br /> Through an aerial photograph review, since 1953 until construction of the BNSF facility, the site <br /> appears to have been used for agriculture. In the six photographs reviewed, up until 111985 the site <br /> appeared essentially the same, i.e., covered by row crops. <br /> 20-1108-31.G02/2000R1099 November 21,2000 <br /> ©2000 Kleinfelder,tnc. Page 1 of 4 <br /> KLONFELDER 2825 East Myrtle Street,Stockton, CA 95205-4794 (209)948-1345 (209)948-0621 fax <br /> it <br />