Laserfiche WebLink
rr 'Januaryi28,2003 <br /> Job Number:LG02-496 . <br /> Page 5 <br /> The San Joaquin County-Soil Survey lists the surface.soils at the proposed"project location as <br /> Tujunga�loamy sand (Plate 7).6 -For general background information, the following We presents <br /> some general engineering properties for the'given soil. <br /> Table 3. . <br /> f Selected Soil.Properties,Located on.the Site <br /> From the San Joaquin County Soil Survey (Plate 7). <br /> Soil Naime,and Depth(in) Unified Soil _ Salinity .. Soil Septic tank <br /> Map Symbol Classification mmhos/cm Reaction absorption <br /> PH fields- <br />�Y <br /> Tujunga loamy 0-22:Loamy sand. . SW-SM,SM; '<2 • 6.1-7.3 Severe: <br /> sand, 0 to 2% SP-SM poor filter. <br />, F slopes,259:: <br /> 22-67: Loamy sand,fine . SW-SM,SM, <2' 6.1-7.8 <br /> sand,sand. SP-SM <br /> Note: The.table descriptions do not necessarily reflect site-specific,soil properties. <br /> Twa shallow ercolatiori tests were conducted ow each parcel to evaluate the suitability of the <br /> shallow soil. Plate'1 identifies the locations of the percolation tests. Each of the percolation test <br /> f ' borings were`drilled utilizing a 4-inch diameter hand auger. The soils within.both 3 foot deep <br /> borings were found to be a brown silty fine to medium sand. Generally, the soil properties from <br /> the San Joaquin Soil Survey were similar to the soils encountered Within the shallow percolation <br /> test borings. <br /> Two inch PVC.pipe with an open end on the top and bottom was used for the percolation test. <br /> Perforations were made on approximately the last 12 inches of the pipe. The percolation test <br /> .hole was constructed by first placing approximately two (2) inches of"pea gravel"in the bottom_ <br /> ` of the clean boring., The casing.was set within the open boring on top of the gravel base.. One <br /> ". . foot of"pea gravel"was'backfilled in'the annular space around the PVC casing. ,The percolation <br /> test borings.were pre-soaked 24-hours prior to the test on January 7, 2003. <br /> A four(4)hour test.was conducted for each percolation hole. Each test was conducted on <br /> January 7, 2003 under EHD permit no. SR0032302. The drop of water was measured each-%z <br /> 6 USDA Soil Conservation'Servic e, 1992,Soil Survey,of San Joaquin County,California;scale 1:24,000. ' <br /> O � <br /> r <br />