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• rate for a shallow test is greater than 1 minute per inch (min/in) but less than or equal to 60 min/in drop. A deep percolation test hole has a depth between 42 inches and 25 feet; a satisfactory percolation rate for a deep test is greater than 1 min/in but less than or equal to 30 min/in drop. For the Site to utilize a standard septic system, one percolation test per parcel must demonstrate a satisfactory percolation rate. Details and results of the percolation tests are summarized in the following table. Table 2. Percolation Test Summary Test No., Percolation Percolation Test Duration Comments Date Tested Test Rate (see notes) Depth (ft.) (minutes/inch) P1-S-#1 7-18-18 3.05 <0.67 1 hr. Failed, rate too Shallow Test rapid* P1-S-#2 Satisfactory 7-27-18 3.35 1.2 1 hr. perc. rate Shallow Test P1-D Satisfactory 7-27-18 9.65 2.4 1 hr. perc. rate Deep Test • P2-S Failed, rate too 7-18-18 3.25 0.89 1 hr. rapid* Shallow Test P2-D 7-27-18 13.68 1.3 1 hr. Satisfactory Deep Test 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. A satisfactory percolation rate for a deep test is greater than 1 min/in but less than or equal to 30 min/in. Only one test(shallow or deep) is required to pass per parcel for that parcel to utilize a standard septic system. Discussion of Percolation Test Results The soils within the percolation test areas have demonstrated satisfactory percolation rates for the use of standard septic systems utilizing leach lines and seepage pits in accordance with the requirements of the San Joaquin County Environmental Health Department. Discussion of Septic System Sizing Future septic system construction should follow the San Joaquin County On-Site Wastewater Treatment Systems Standards (2017) where applicable. • LOGE 1825 Page 6