SU0011462 SSNL - Laserfiche WebLink

Home Browse Search

LOGE 1726: Phillips/Michael David NLS Addendum Page 3 September 20, 2017 • An electronic well sounder with a depth accuracy of 1/100`h foot was utilized for the water level measurements. The water level was measured against a fixed reference point on the well casing. Measurements were recorded on the data sheet in decimal feet. When necessary after measuring the water level, the hole was refilled with water to a level of six inches or more above the bottom of the hole. Percolation Test Results The completed percolation test form is attached to this report. The form was signed by Mr. Sangalang and indicates a percolation rate for the hale based on the final water drop observed. Per San Joaquin County Environmental Health Department's definition, a shallow percolation test hole has a depth between 36 and 42 inches; a satisfactory percolation rate for a shallow test is greater than 1 minute per inch (min/in) but less than or equal to 60 min/in drop. For the Site to utilize a standard septic system, one percolation test must demonstrate a satisfactory percolation rate within the proposed septic system disposal field. Details and results of the percolation test are summarized in the following table. Table 1. Percolation Test Summary Test No., Percolation Percolation Test Duration Comments Date Tested Test Rate (see notes) Depth (ft.) (minutes/inch) • P1 3.35 1.6 1 hr. Satisfactory 9/12/2017 perc. rate Note: A satisfactory percolation rate for a "shallow' test is greater than 1 min/in but less than or equal to 60 min/in. Discussion of Percolation Test Results The soil within the proposed sewage disposal area of the Site has demonstrated a satisfactory percolation rate for the use of a septic system in accordance with the requirements of the San Joaquin County Environmental Health Department. Discussion of Septic System Sizing Septic system construction utilizing leach lines or a filter bed should follow the San Joaquin County On-Site Wastewater Disposal Standards (2016) where applicable. Based on the guidance within that document, a percolation rate between 1 and 5 min/in requires 20 feet minimum separation from the bottom of the dispersal system to ground water. In the original Soil Suitability/Nitrate Loading Stur y (2015), Live Oak estimated depth to ground water at 25 to 31 feet below ground surface on the Site. This separation would allow for a standard system. •