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March 26,2003 = . <br /> Job Number:LG02-031 <br /> Page.S <br /> 2 Table 2. z <br /> Selected sail-properties of the Tokay fine sand, <br /> San Joaquin County Soil Survey report 6 . <br /> Depth Salinit Soil m Unified Soil y Septic.tank <br /> Soil Naive and De P.. ) , <br /> Map Symbol Classification mmhos/cm Reaction absorption <br /> PH. .'field <br /> ` <2 6:1-7.8 Slight <br /> Tokay fine sandy- 0-19:Fine sandy loam SM <2 6:1-7.8 <br /> SM <br /> loam,0 to 2% . 19-46-.:tine sandy loam SM <2 6.1-7.8 <br /> slo es,256. 45-60: Cemented . <br /> Note: The table descriptions do riot-necessarily reflect site-specific soil properties. <br /> ercolation test borings.were drilled in an area-proposed for the new septic <br /> .. A.total of tvvo (2),'percolation e B-5.3 4-inch hollow <br /> system (Plate 1). Both percolation test holes were dulled with aedMobtageol-1 <br /> stern auger rig. The soil cuttings aril drillin resist <br /> s a ow and deep percolation test hole was drilled in the area of the proposed septic system. <br /> The surface soils"of the proposed septic system disposal field were,found to be silty sand to a <br /> depth of 4 feet. The.surface soils were underlain by a clayey silt to a depth of eet o by <br /> slightly cemented sandy 'silty to a depth of 1'S feet. .The soil below 15 fee mix of silty sand <br /> sand silt to a of 22 feet. <br /> A 2-inch diameter PVC plastic pipe was placed'into each percolation test hole. The pipe.was <br /> open ended and slots were cut on approximately.the last 1 foot of the pipe. The pipe�was.set on <br /> k..`� approximately 2 inches of ea avel. Pea gravel was,placed in the annular space.around the pipe <br /> pea " <br /> r= to a height.of 2'to 3 feet. The hole was pre-soaked with 12 inches of water 24 hours prior to the <br /> ' test on March 10, 2003. A Four hour percolation test was run on both the.shallow and deep' <br /> percolation test hole on March 1 i; 2003. A representative of EHD observed.the last percolation <br /> test measurement at each hole location. <br /> A satisfactory percolation rate was achieved"at both locations tested. A satisfactory percolation <br /> rate is less than or equal to b0 minutes per inch or less (drop).for a"shallow test and 30 minutes <br /> per inch or less (drop) for a deep test per EHD requirements for a shallow percolation test. <br /> Pleasexefer to Table 3 for a summary of the percolation tests. <br />