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30 August 2019 <br />AGE Project No. 19-4819 <br />Page 7 of 15 <br /> <br />4.6. GROUNDWATER ANALYTICAL REPORT <br /> <br />Nitrate as N was detected at 1.5 milligrams per liter (mg/l) and Nitrate as NO3- was <br />detected at 6.6 mg/l in the water sample. The MAI laboratory report (Work Order: <br />1908C95) with quality assurance/quality control (QA/QC) reports and chain-of-custody <br />form are provided in Appendix C. <br /> <br /> <br />5.0. SOIL PROFILE <br /> <br />An OWTS Permit was issued for the property by the EHD on 16 August 2019 to perform <br />a percolation test (Appendix D). On 22 August 2019, a 4-inch diameter hand auger was <br />utilized to advance a percolation test hole to 42 inches bsg, in the proposed septic system <br />disposal field area. <br /> <br />A plan of the specific site features including the percolation test hole locations <br />(i.e., structures, drives, wells, septic systems, large trees, pastures, pools, natural <br />drainage courses, ponds, waterways, etc.) is illustrated in Figure 2. <br /> <br /> <br />5.1. SOIL PROFILE PIT INCLUDING DEPTH AND DIMENSIONS <br /> <br />The percolation test hole was located in the disposal field area of the proposed septic <br />system. The percolation test hole was advanced to a depth of 42 inches bsg using a four- <br />inch diameter hand auger (Figure 2). <br /> <br /> <br />5.2. SOIL LITHOLOGY AS RELATED TO FUTURE ONSITE SEPTIC USES <br /> <br />The soil was visually described in accordance with the Unified Soil Classification System <br />by a representative of AGE under the supervision of a California Professional Geologist. <br />The soil collected from the percolation test hole boring consisted of dry silty clayey fine- <br />grained sand from surface grade to approximately 30 inches bsg and fine-grained sand <br />with silt from 30 inches bsg to total depth. The soil type is considered semi-permeable to <br />permeable and sufficient for liquid waste disposal and treatment. <br /> <br /> <br />6.0. PERCOLATION TEST INFORMATION <br /> <br />A percolation soil suitability test was performed at the site under EHD permit No. <br />SR0081050 using a four-inch diameter soil boring established to depths of 42 inches bsg. <br />A site map showing the approximate location of the percolation test hole is illustrated in <br />Figure 2. A precise description of the location and construction of the percolation test hole <br />is included in Appendix D (EHD form 42-03 revised 11/02/2009). The soil suitability study <br />was conducted within the area of the proposed septic system leach field. <br />