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5.4 Discussion of soil lithology as related to future onsite septic uses: The Hollenbeck Silty Clay and Stockton Clay have a permeability that is slow. 6.0 PERCOLATION TEST INFORMATION SECTION 6.1 Site map showing the location, with concise and accurate dimensions of the percolation test holes on the parcel: See Appendix. 6.2 The minimum number of shallow and deep percolation tests were performed fo►- each parcel: One shallow percolation test hole was prepared on subject Parcel. 6.3 Description of the date, time and protocol used to prepare the test hole, including depth and dimensions of hole, preparation of hole, and depth of water used to presoak (minimum 12 inches): The shallow test hole was excavated to a depth of 42 inches and 10 inches in diameter and backfilled with 2 inches of "pea gravel" in accordance with County Standards. The shallow hole was prepared by Kevin Holtberg, the owner, on December 20, 2021 at 7:30 a.m. On January 4, 2022 at 7:30 a.m., the 24 hour presoak period was started. The hole was filled with 12 inches of water over the gravel at this time. 6.4 Description of the date, time and condition of the test hole after the 24-hour soak period (hole still intact, hole dry, preparation of hole, and depth of water used to presoak (minimum 12 inches): On January 5, 2022 at 7:30 a.m., the shallow test hole was dry. Six inches of water was added to the hole and the hole was deemed suitable to continue. The shallow test passed the minimum County requirements. 6.5 The test conformed to SJC Policy EH 02-02 (correct depth, diameter, 2" gravel, 6" water refill, correct readings recorded). The percolation tests conformed to San Joaquin County Policy EHD 02-02. 6.6 Complete Percolation Test Form (including readings) was provided with REHS verification signature. The rate was correctly calculated using the last reading. See Appendix for Test Results Form. Shallow Test(s) TEST HOLE PERCOLATION RATE 1 (Parcel 1) 42 Min/In *See Results in Appendix. 6.7 Discussion of any potential problems predicted and/or the need for an engineered or alternative septic system. In this area, the soils are classified as Hollenbeck Silty Clay and Stockton Clay. Due to this classification and percolation rate, a standard septic system similar to the one found on the other homesites would be recommended on the proposed parcels.