SU0012921 SSNL - Laserfiche WebLink

Home Browse Search

it k9 KLEiNFELDER File No. 20-3551-01 January 27 , 1992 0 On January 15, 1992 , a representative of our firm visited five residencesi;located on and adjacent to the site. The purpose of the visits was to obtain information on septic system use and to inquire about any problems known to exist with this method of sewage disposal. Residents were home i, at four of thell locations, and they reported having no problems with the performance of their septic systems. The residents ' opinions on the quality of water produced from their private wells varied from "hard" to "excellent" to "fair. " ITEM C-2t i3 "The suitability of the soil for development utilizing septic systems;" , i On January 14, 1992 , a representative of our firm drilled l and set-up four, 3-foot deep percolation test holes at the approximate locations indicated on Plate I. The test holes were drilled with hand drilling equipment using a 6-inch diameter continuous-flight auger. Perforated PVC pipe was inserted into the test holes to prevent disturbance when adding water. The test holes were filled with relatively clean water and were left to soak overnight. Our representative returned to the site on January 15, 1992, and water remained in all four test holes, which �r constituted ailing tests. 16� our representatives drilled and set-up (f�wo - add itions-l ,;percolation test holes in the vicinity of eac_h-Z�f-t�xe 3-foot deep test locations. The additional test holes varied from approximately 3 to 9-1/2 feet deep. The test holes were drilled with a truck-mounted drill rig equipped with 6-inch diameter continuous-flight augers. ` Perforated PVC !Npipe was inserted int the test holes to prevent disturbance when adding water. The test holes were filled with approximately 3 feet of re a ively clean water the day before 'ltesting and were left to soak overnighg On January 21 and 22 , 19 our representative returned to he�' the our tests. As per San ' Joaquin Countyl�,guidelines, the tests were performed for a period of 4 hours. The last 30 minutes of each test were used to calculate the percolation rates. In order to use standard leachl� lines, the County requires a percolation rate of 60 minutes per inch (min/in) , or faster, at the 3- foot depth. One 3-foot deep test passed (Lot 3) with a percolation rate of 60 minutes per inch. In order to use sump pits, the County requires a percolation rate of 30 f' min/in, or faster, at a depth greater than 3 feet. The .F Copyright 1992 Kleinfelder, Inc. Page 2 of 4 M