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June 8,2001 <br /> Job Number: LGOI-141 <br /> Page 5 <br /> Table 3. <br /> _ Selected Soil Properties of the Veritas Fine Sandy Loam (No. 266)' <br /> Soil Name and Depth(in) Unified Soil Salinity Soil Septic tank <br /> Map Symbol Classification mmhos/cm Reaction absorption <br /> pH fields <br /> Veritas fine 0-15:Fine sandy Loam SM,SC-SM <2 24-8.4 Moderate: <br /> ` sandy loam,0 15-54:Clay loam,clay SM,SC-SM <2 7.4-8.4 flooding, <br /> to 2%slopes, 54-70: Cemented --- --- --- cemented pan. <br /> 266. <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. <br /> One soil boring was drilled by Neil O. Anderson& Associates, Inc., to a depth of 2.5 feet <br /> ` to characterize the soil profile of the proposed septic field as per the requirements of San Joaquin <br /> County Environmental Health Division. A 4.5 inch portable hand auger was used to drill the <br /> _ boring between many truck trailers. Below a depth of 2.5 feet, a hardpan layer was present <br /> causing auger refusal.No ground water was encountered in the boring. Generally, the soil <br /> profile consisted of a 0.5-foot aggregate surface followed by a silty sand to a total depth of 2.5 <br /> feet. Below 2.5 feet is a hardpan surface. Table 4 presents the log of the 2.5-foot soil boring. <br /> Table 4. <br /> 2.5-foot Soil Profile Log. <br /> Depth(feet) soil <br /> 0 to 0.5 Aggregate surface. <br /> 0.5 to 2.5 30 Light brown to rusty silty fine to medium sand(SM). <br /> One percolation test was performed adjacent to the exploratory boring in the proposed <br /> septic leach field. The percolation test hole was set to a depth of 2.5 feet in a soil consisting of <br /> silty sand. The percolation test casing was a 2-inch PVC pipe with holes drilled on the bottom. <br /> Two inches of"pea gravel'was placed in the bottom of hole, the casing was installed, and <br /> several feet of"pea gravel'was backfilled in the annular space. A preliminary percolation test <br /> ti was conducted on May 17, 2001 to determine if a 1-hour or 4-hour test was required. Based on a <br /> preliminary test, a one(1)hour test would be acceptable. The percolation hole was pre-soaked <br /> 24-hours prior to the actual one-hour percolation test. <br /> `+0` <br />