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January 6,2000 Job Number: 599328 Page 4 r of Calaveras River and Vicinity.' The Calaveras River and Vicinity was deposited by Calaveras River, Bear Creek, and several lesser streams between the Molelumne and Stanislaus Rivers. The bw alluvium consists of gravel, sand, silt, and clay including flood plane deposits. The site is located on Urban Land Soil. Information from the Soil Conservation Service is IBM not available due to the land being covered and altered by Urban Growth. Selected soil properties neighboring the Urban Land area is summarized in the following table and can be located on Plate 7.2 ` -San Joaquin County Soil Survey- Selected Soil Properties of Onsite Soils Z Soil Depth Unified Soil Classification Salinity Soil Perme- Septic Name (in) mmhost Reaction ability tank and Map em pH in/hr absorption Symbol fields Urban NA NA NA NA NA NA Land,260. Hollen- 0-10 Silty clay, CH,CL. <2 6.6-8.4 0.06-2.0 Severe: beck silty 10-37 Clay,silty clay,CH,CL. <2 6.6-8.4 0.06-2.0 Peres clay, 173. 37-42 Silty clay loam,clay loam, CL. <2 6.6-8.4 0.2-0.6 slowly. 42.60 Cemented Jacktone 0-22 Clay, CL,CH. <2 6.6-8.4 0.06-2.0 Severe: clay, 180. 22-34 Clay loam, clay,silty clay, CL,CH. <2 7.9-9.0 0.06-2.0 cemented 34-37 Indurated - - - pan,peres 37-46 Loam,clay loam,CL-ML,CL. <2 7.9-9.0 0.2-0.6 slowly. 46.60 Cemented. _ - Stockton 0-12 Silty clay loam,ML. <2 7.4-8.4 0.2-0.6 Severe: ` silty clay 12-34 Clay,silty clay,CL,CH. <2 7.4-8.4 0.06-0.2 peres loam, 34-47 Clay loam,silty clay loam, CL,ML. <2 7.9-8.4 0.06-0.2 slowly. 249. 47-00 Cemented. - Note: The table descriptions do not necessarily reflect site-specific soil properties. NA=Information not available for Urban Land area,over 80%of area covered by buildings. r ' Atwater,B. F. 1982,Geologic maps of the Sacramento-San Joaquin Delta,California,USGS Miscellaneous Field Studies Map,MF- 1401,p. (21 sheets). r 2 USDA Soil Conservation Service, Soil Survey of San Joaquin County,California, Sheet 31. r 'DF0.j°4 S1