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Now <br /> Our Lady of Sorrows Chapel <br /> Page 5 <br /> yield much water to well and would impede the vertical movement of water.2 <br /> The soils located on the site are reported to be the Sailboat Silt(Plate 8). The following <br /> is an excerpt of the engineering properties of the following soils.' <br /> Selected Properties from the Soil Survey of San Joaquin County, California' <br /> Soil Name Depth(in) Unified Soil Salinity Soil Reaction Septic tank absorption <br /> and Map Classification mmhos/cm pH fields <br /> Symbol <br /> Sailboat silt 0-8: Silt loam CL-ML,ML <2 6.1-7.3 Severe:peres slowly. <br /> loam,234 <br /> 8-23: Stratified sandy 0--mi"CL <2 6.6-7.8 <br /> loam to silty clay loam <br /> 23-61: Stratified sandy CL <2 7.4-8.4 <br /> clay loam to silty clay <br /> loam <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. <br /> One soil boring was drilled by Neil O. Anderson& Associates and was excavated to a <br /> depth of 20 feet to characterize the soil profile of the site and determine the depth to ground <br /> water. The entire soil profile is characterized as brown fine to medium sand. First ground-water <br /> was encountered at 17 feet in depth. The boring was backfilled to a depth of 8.5 feet and a 2 in <br /> pipe was installed in the boring for the percolation test. Several inches of"pea gravel" was "`"' <br /> placed in the bottom of the hole, the casing was installed, and several feet of"pea gravel" was <br /> backfilled in the annular space. The result of the percolation test indicates a fast peculation rate <br /> of 0.268 min/in (see the percolation test and adjustment calculation in appendix). <br /> VII. NITRATE LOADING STUDY <br /> A build up of nitrates in the upper ground-water zones can cause a temporary blood <br /> disorder in infants called methemoglobinemia(blue baby). Serious and occasionally fatal <br /> _ z Page,R.W., 1986,Geology of the Fresh Ground-Water Basin of the Central Valley,California,with <br /> Texture Maps and Sections,USGS Prof. Paper 1401-C. <br /> 3 USDA Soil Conservation Service,Soil Survey of San Joaquin County,California, sheet 8. <br /> P pERSOP <br /> � <br /> D ^ <br /> O � <br /> 4SSOG\ <br />