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Lisa Medina �../ <br /> December 29,2003 <br /> Page 3 <br /> hour percolation tests was observed by Mr. Michael Escotto, Environmental Health <br /> Inspector, EHD. <br /> Measurement of the water level during the percolation test was from a fixed reference <br /> point on the PVC casing using an electric well sounder with an depth accuracy of 1/100th <br /> foot. All tabulated values on the field data sheet (attached) are in decimal feet. After <br /> water drop was observed, the holes were checked for refill. The refill level is <br /> approximately 0.5 ft (6 inches) of water above the bottom level of the percolation test <br /> hole. The readings were taken approximately every 30-minutes for a period of 4 hours. <br /> A shallow percolation test is defined as being between 36 and 42 inches in depth. A deep <br /> percolation test is defined as being between 42 inches and 25 feet in depth. A satisfactory <br /> percolation rate for a shallow test is less than or equal to 60 minutes per inch drop. A <br /> satisfactory percolation rate for a deep test is less than or equal to 30 minutes per inch <br /> drop. Either one shallow or deep test must demonstrate a satisfactory percolation rate on <br /> each parcel for the percolation test requirement to be met by EHD. <br /> A summary of the percolation tests is presented in the following table. <br /> Table 5. <br /> Summary of Percolation Tests. <br /> Test No., Percolation Percolation Rate Test Comment <br /> Date Tested Test Depth(ft) (minutes/inch) Duration (see notes) <br /> P-1 shallow, 12-18-03 3.15 4.2 4 hr Satisfactory percolation rate <br /> P-1 deep, 12-18-03 22.4 4.5 1 4 hr I Satisfactory percolation rate <br /> Notes: A satisfactory percolation rate for a"shallow"test is less than or equal to 60 minutes per inch. <br /> A satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. <br /> Discussion of Percolation Tests <br /> The shallow soil strata was composed dark brown/gray silty sand with clay from 0 to 4 <br /> feet. Located below the silty sand was various layers of brown sandy lean clay and sandy <br /> silt to a depth of 25 feet. Both tests demonstrated a satisfactory percolation rate in <br /> accordance with the requirements of the San Joaquin County EDH. The soils of the site <br /> appear to be suitable for a septic system utilizing shallow leach lines and seepage pits. <br /> Required Size of Septic System <br /> The construction specifications of the septic system should follow the San Joaquin <br /> County Sewage Standards guidelines. <br /> �pE RSO <br /> P 1. <br /> a <br /> 1 W <br /> q P <br /> SS OC <br />