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'^ April 13, 2000 <br /> .lob Number: LG00 1141 <br /> : Paje5 <br /> loam. The next 9 inches is:a.claypan of brown clay: The.lower part to'a depth of 60 inches is a <br /> (' :- and-and-light brown,indurated,hard'pan: In,some areas"the surface.layeYis a fine sandy loam or, <br /> t <br /> 3 sandy Ioam. Permeability is_very.slow.and the shrink-swell potential is.high. Rtinoffis ponded in <br /> - <br /> d <br /> pools, is very slow or porided in level areas,and is slow on the convex slopes. The hazard of <br /> water.erosion is shg.h"a -The following is an excerpt of the engineering properties for the <br /> following soil <br /> A. <br /> Table of S44 ed Soil_Properties of the San,Joaquin.Urban.land Complex' <br /> Soil Name and Depth.Qn) -Unified Soil Salinity. Soil . Septic tank. - <br /> ? Map Symbol ; Classification rumhostrur Reaction absorption' <br /> a pH. fields <br /> San Joaquin 0-12:Loam, CL-PAI,ML :<2 5.6.6.5 " Severe: <br /> loam,0 to 2. 13 26: Sand 'clay loam, -2 6.1-7:3 cemented pan, <br /> percent slopes fine sandy loam :SC' • pence slowly. <br /> 240 <br /> 26-35t Clay loam,clay CL .. Q 6.1-7.8 <br /> Indurated. — <br /> Note:_ The table descriptions do,not necessarily reflect site-specific soil properties. <br /> Examination of awater well drilling log located at 12759 E. Brandt Road (enclosed in the <br /> ennui section located in the endix indicates generally alternatin Ia ens of sand cla and <br /> P . pP ) g, y . $ y y . y <br /> v sand:with occasional gravel layers to a total well depth of.z " eet. The sandy clay layers(if <br /> continuous)would act as'confining layer restricting the vertical mixing of ground water located' <br /> within the more permeable layers composed of sand and gravel. This in not:uncommon for <br /> sediments located'in he Sacramento-San Joaquin Valley especially near large river.drainages.' . <br /> Three soil borings were drilled by Neil O.,Anderson& Associates, Inc.to:characterize,the <br /> �-+ subsurface and locateja suitable'site.for the proposes septic field Boring B-1 was somewhat <br /> .different in composition when compared to borings.B=2:and B-3.. Boring 9-1. was composed of a <br /> sandy clay, clayey sarid,-sandy clay and clay wnh;sand to a,maximum depth of 15 feet (Plate 8),. A <br /> zone between 10 5 and 11 was found to be molst.,No hardpan layer was found to exist at B-1. <br /> 1. . . � .� •., <br /> 3 USDA Soil Conservation Service;Sbil Survey of San Joaquin County;California, Sheet 7. <br />